Merge pull request #3941 from vmware/replication_enhancement

Replication enhancement

.travis.yml

@@ -89,8 +89,8 @@ script:
   - sudo mkdir -p ./make/common/config/registry/
   - sudo mv ./tests/reg_config.yml ./make/common/config/registry/config.yml
   - sudo docker-compose -f ./make/docker-compose.test.yml up -d
-  - go list ./... | grep -v -E 'vendor|tests' | xargs -L1 fgt golint
-  - go list ./... | grep -v -E 'vendor|tests' | xargs -L1 go vet
+  - go list ./... | grep -v -E 'vendor|tests|test' | xargs -L1 fgt golint
+  - go list ./... | grep -v -E 'vendor|tests|test' | xargs -L1 go vet
   - export MYSQL_HOST=$IP
   - export REGISTRY_URL=$IP:5000
   - echo $REGISTRY_URL

docs/swagger.yaml

@@ -1391,6 +1391,32 @@ paths:
           description: User need to login first.
         '500':
           description: Unexpected internal errors.
+    put:
+      summary: Update status of jobs. Only stop is supported for now.
+      description: >
+        The endpoint is used to stop the replication jobs of a policy.
+      tags:
+        - Products
+      parameters:
+        - name: policyinfo
+          in: body
+          description: The policy ID and status.
+          required: true
+          schema:
+            $ref: '#/definitions/UpdateJobs'
+      responses:
+        '200':
+          description: Update the status successfully.
+        '400':
+          description: Bad request because of invalid parameters.
+        '401':
+          description: User need to login first.
+        '403':
+          description: User has no privilege for the operation.
+        '404':
+          description: Resource requested does not exist.
+        '500':
+          description: Unexpected internal errors.
   /jobs/replication/{id}:
     delete:
       summary: Delete specific ID job.
@@ -1511,7 +1537,7 @@ paths:
           description: Create new policy.
           required: true
           schema:
-            $ref: '#/definitions/RepPolicyPost'
+            $ref: '#/definitions/RepPolicy'
       tags:
         - Products
       responses:
@@ -1566,10 +1592,10 @@ paths:
           description: policy ID
         - name: policyupdate
           in: body
-          description: 'Update policy name, description, target and enablement.'
+          description: 'Updated properties of the replication policy.'
           required: true
           schema:
-            $ref: '#/definitions/RepPolicyUpdate'
+            $ref: '#/definitions/RepPolicy'
       tags:
         - Products
       responses:
@@ -1587,35 +1613,27 @@ paths:
             project and target.
         '500':
           description: Unexpected internal errors.
-  /policies/replication/{id}/enablement:
-    put:
-      summary: Put modifies enablement of the policy.
+  /replications:
+    post:
+      summary: Trigger the replication according to the specified policy.
       description: |
-        This endpoint let user update policy enablement flag.
+        This endpoint is used to trigger a replication.
       parameters:
-        - name: id
-          in: path
-          type: integer
-          format: int64
-          required: true
-          description: policy ID
-        - name: enabledflag
+        - name: policy ID
           in: body
-          description: The policy enablement flag.
+          description: The ID of replication policy.
           required: true
           schema:
-            $ref: '#/definitions/RepPolicyEnablementReq'
+            $ref: '#/definitions/Replication'
       tags:
         - Products
       responses:
         '200':
-          description: Update job policy enablement successfully.
-        '400':
-          description: Invalid enabled value.
+          description: Trigger the replication successfully.
         '401':
           description: User need to log in first.
         '404':
-          description: The specific repository ID's policy does not exist.
+          description: The policy does not exist.
         '500':
           description: Unexpected internal errors.
   /targets:
@@ -2378,33 +2396,35 @@ definitions:
         type: integer
         format: int64
         description: The policy ID.
-      project_id:
-        type: integer
-        format: int64
-        description: The project ID.
-      project_name:
-        type: string
-        description: The project name.
-      target_id:
-        type: integer
-        format: int64
-        description: The target ID.
       name:
         type: string
         description: The policy name.
-      enabled:
-        type: integer
-        format: int
-        description: The policy's enabled status.
       description:
         type: string
         description: The description of the policy.
-      cron_str:
-        type: string
-        description: The cron string for schedule job.
-      start_time:
-        type: string
-        description: The start time of the policy.
+      projects:
+        type: array
+        description: The project list that the policy applys to.
+        items:
+          $ref: '#/definitions/Project'
+      targets:
+        type: array
+        description: The target list.
+        items:
+          $ref: '#/definitions/RepTarget'
+      trigger:
+        $ref: '#/definitions/RepTrigger'
+      filters:
+        type: array
+        description: The replication policy filter array.
+        items:
+          $ref: '#/definitions/RepFilter'
+      replicate_existing_image_now:
+        type: boolean
+        description: Whether to replicate the existing images now.
+      replicate_deletion:
+        type: boolean
+        description: Whether to replicate the deletion operation.
       creation_time:
         type: string
         description: The create time of the policy.
@@ -2412,55 +2432,42 @@ definitions:
         type: string
         description: The update time of the policy.
       error_job_count:
-        format: int
+        type: integer
         description: The error job count number for the policy.
-      deleted:
-        type: integer
-  RepPolicyPost:
+  RepTrigger:
     type: object
     properties:
-      project_id:
-        type: integer
-        format: int64
-        description: The project ID.
-      target_id:
-        type: integer
-        format: int64
-        description: The target ID.
-      name:
+      kind:
         type: string
-        description: The policy name.
-      enabled:
-        type: integer
-        format: int
-        description: '1-enable, 0-disable'
-  RepPolicyUpdate:
+        description: The replication policy trigger kind. The valid values are manual, immediate and schedule. 
+      schedule_param:
+        $ref: '#/definitions/ScheduleParam'
+  ScheduleParam:
     type: object
     properties:
-      target_id:
+      type:
+        type: string
+        description: The schedule type. The valid values are daily and weekly. 
+      weekday:
+        type: integer
+        format: int8
+        description: Optional, only used when the type is weedly. The valid values are 1-7.
+      offtime:
         type: integer
         format: int64
-        description: The target ID.
-      name:
-        type: string
-        description: The policy name.
-      enabled:
-        type: integer
-        format: int
-        description: The policy's enabled status.
-      description:
-        type: string
-        description: The description of the policy.
-      cron_str:
-        type: string
-        description: The cron string for schedule job.
-  RepPolicyEnablementReq:
+        description: The time offset with the UTC 00:00 in seconds.
+  RepFilter:
     type: object
     properties:
-      enabled:
-        type: integer
-        format: int
-        description: The policy enablement flag.
+      kind:
+        type: string
+        description: The replication policy filter kind. The valid values are project, repository and tag.
+      pattern:
+        type: string
+        description: The replication policy filter pattern.
+      metadata:
+        type: object
+        description: This map object is the replication policy filter metadata.
   RepTarget:
     type: object
     properties:
@@ -2947,12 +2954,24 @@ definitions:
                 type: integer
                 description: The offest in seconds of UTC 0 o'clock, only valid when the policy type is "daily"
             description: The parameters of the policy, the values are dependant on the type of the policy.
+  Replication:
+    type: object
+    properties:
+      policy_id:
+        type: integer
+        description: The ID of replication policy
   RepositoryDescription:
     type: object
     properties:
       description:
         type: string
         description: The description of the repository.
-          
-      
-    
+  UpdateJobs:
+    type: object
+    properties:
+      policy_id:
+        type: integer
+        description: The ID of replication policy  
+      status:
+        type: string
+        description: The status of jobs. The only valid value is stop for now.

make/photon/db/registry.sql

@@ -147,6 +147,8 @@ create table replication_policy (
  description text,
  deleted tinyint (1) DEFAULT 0 NOT NULL,
  cron_str varchar(256),
+ filters varchar(1024),
+ replicate_deletion tinyint (1) DEFAULT 0 NOT NULL,
  start_time timestamp NULL,
  creation_time timestamp default CURRENT_TIMESTAMP,
  update_time timestamp default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
@@ -185,6 +187,17 @@ create table replication_job (
  INDEX poid_uptime (policy_id, update_time)
  );
 
+create table replication_immediate_trigger (
+ id int NOT NULL AUTO_INCREMENT,
+ policy_id int NOT NULL,
+ namespace varchar(256) NOT NULL,
+ on_push tinyint(1) NOT NULL DEFAULT 0,
+ on_deletion tinyint(1) NOT NULL DEFAULT 0,
+ creation_time timestamp default CURRENT_TIMESTAMP,
+ update_time timestamp default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
+ PRIMARY KEY (id)
+ );
+ 
 create table img_scan_job (
  id int NOT NULL AUTO_INCREMENT,
  status varchar(64) NOT NULL,

make/photon/db/registry_sqlite.sql

@@ -142,6 +142,8 @@ create table replication_policy (
  description text,
  deleted tinyint (1) DEFAULT 0 NOT NULL,
  cron_str varchar(256),
+ filters varchar(1024),
+ replicate_deletion tinyint (1) DEFAULT 0 NOT NULL,
  start_time timestamp NULL,
  creation_time timestamp default CURRENT_TIMESTAMP,
  update_time timestamp default CURRENT_TIMESTAMP
@@ -175,6 +177,16 @@ create table replication_job (
  update_time timestamp default CURRENT_TIMESTAMP
  );
 
+create table replication_immediate_trigger (
+ id INTEGER PRIMARY KEY, 
+ policy_id int NOT NULL,
+ namespace varchar(256) NOT NULL,
+ on_push tinyint(1) NOT NULL DEFAULT 0,
+ on_deletion tinyint(1) NOT NULL DEFAULT 0,
+ creation_time timestamp default CURRENT_TIMESTAMP,
+ update_time timestamp default CURRENT_TIMESTAMP
+ );
+
 
 create table img_scan_job (
  id INTEGER PRIMARY KEY,

src/adminserver/client/client.go

@@ -15,16 +15,11 @@
 package client
 
 import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"net/http"
 	"strings"
 
-	"github.com/vmware/harbor/src/adminserver/client/auth"
 	"github.com/vmware/harbor/src/adminserver/systeminfo/imagestorage"
+	"github.com/vmware/harbor/src/common/http"
+	"github.com/vmware/harbor/src/common/http/modifier/auth"
 	"github.com/vmware/harbor/src/common/utils"
 )
 
@@ -43,38 +38,29 @@ type Client interface {
 }
 
 // NewClient return an instance of Adminserver client
-func NewClient(baseURL string, authorizer auth.Authorizer) Client {
+func NewClient(baseURL string, cfg *Config) Client {
 	baseURL = strings.TrimRight(baseURL, "/")
 	if !strings.Contains(baseURL, "://") {
 		baseURL = "http://" + baseURL
 	}
-	return &client{
-		baseURL:    baseURL,
-		client:     &http.Client{},
-		authorizer: authorizer,
+	client := &client{
+		baseURL: baseURL,
 	}
+	if cfg != nil {
+		authorizer := auth.NewSecretAuthorizer(cfg.Secret)
+		client.client = http.NewClient(nil, authorizer)
+	}
+	return client
 }
 
 type client struct {
-	baseURL    string
-	client     *http.Client
-	authorizer auth.Authorizer
+	baseURL string
+	client  *http.Client
 }
 
-// do creates request and authorizes it if authorizer is not nil
-func (c *client) do(method, relativePath string, body io.Reader) (*http.Response, error) {
-	url := c.baseURL + relativePath
-	req, err := http.NewRequest(method, url, body)
-	if err != nil {
-		return nil, err
-	}
-
-	if c.authorizer != nil {
-		if err := c.authorizer.Authorize(req); err != nil {
-			return nil, err
-		}
-	}
-	return c.client.Do(req)
+// Config contains configurations needed for client
+type Config struct {
+	Secret string
 }
 
 func (c *client) Ping() error {
@@ -88,96 +74,32 @@ func (c *client) Ping() error {
 
 // GetCfgs ...
 func (c *client) GetCfgs() (map[string]interface{}, error) {
-	resp, err := c.do(http.MethodGet, "/api/configurations", nil)
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
-
-	b, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		return nil, err
-	}
-
-	if resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("failed to get configurations: %d %s",
-			resp.StatusCode, b)
-	}
-
+	url := c.baseURL + "/api/configurations"
 	cfgs := map[string]interface{}{}
-	if err = json.Unmarshal(b, &cfgs); err != nil {
+	if err := c.client.Get(url, &cfgs); err != nil {
 		return nil, err
 	}
-
 	return cfgs, nil
 }
 
 // UpdateCfgs ...
 func (c *client) UpdateCfgs(cfgs map[string]interface{}) error {
-	data, err := json.Marshal(cfgs)
-	if err != nil {
-		return err
-	}
-
-	resp, err := c.do(http.MethodPut, "/api/configurations", bytes.NewReader(data))
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode != http.StatusOK {
-		b, err := ioutil.ReadAll(resp.Body)
-		if err != nil {
-			return err
-		}
-		return fmt.Errorf("failed to update configurations: %d %s",
-			resp.StatusCode, b)
-	}
-
-	return nil
+	url := c.baseURL + "/api/configurations"
+	return c.client.Put(url, cfgs)
 }
 
 // ResetCfgs ...
 func (c *client) ResetCfgs() error {
-	resp, err := c.do(http.MethodPost, "/api/configurations/reset", nil)
-	if err != nil {
-		return err
-	}
-
-	if resp.StatusCode != http.StatusOK {
-		b, err := ioutil.ReadAll(resp.Body)
-		if err != nil {
-			return err
-		}
-		return fmt.Errorf("failed to reset configurations: %d %s",
-			resp.StatusCode, b)
-	}
-
-	return nil
+	url := c.baseURL + "/api/configurations/reset"
+	return c.client.Post(url)
 }
 
 // Capacity ...
 func (c *client) Capacity() (*imagestorage.Capacity, error) {
-	resp, err := c.do(http.MethodGet, "/api/systeminfo/capacity", nil)
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
-
-	b, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		return nil, err
-	}
-
-	if resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("failed to get capacity: %d %s",
-			resp.StatusCode, b)
-	}
-
+	url := c.baseURL + "/api/systeminfo/capacity"
 	capacity := &imagestorage.Capacity{}
-	if err = json.Unmarshal(b, capacity); err != nil {
+	if err := c.client.Get(url, capacity); err != nil {
 		return nil, err
 	}
-
 	return capacity, nil
 }

src/adminserver/client/client_test.go

@@ -34,7 +34,7 @@ func TestMain(m *testing.M) {
 		os.Exit(1)
 	}
 
-	c = NewClient(server.URL, nil)
+	c = NewClient(server.URL, &Config{})
 
 	os.Exit(m.Run())
 }

src/common/dao/dao_test.go

@@ -941,7 +941,6 @@ func TestFilterRepTargets(t *testing.T) {
 func TestAddRepPolicy(t *testing.T) {
 	policy := models.RepPolicy{
 		ProjectID:   1,
-		Enabled:     1,
 		TargetID:    targetID,
 		Description: "whatever",
 		Name:        "mypolicy",
@@ -961,15 +960,10 @@ func TestAddRepPolicy(t *testing.T) {
 		t.Errorf("Unable to find a policy with id: %d", id)
 	}
 
-	if p.Name != "mypolicy" || p.TargetID != targetID || p.Enabled != 1 || p.Description != "whatever" {
-		t.Errorf("The data does not match, expected: Name: mypolicy, TargetID: %d, Enabled: 1, Description: whatever;\n result: Name: %s, TargetID: %d, Enabled: %d, Description: %s",
-			targetID, p.Name, p.TargetID, p.Enabled, p.Description)
+	if p.Name != "mypolicy" || p.TargetID != targetID || p.Description != "whatever" {
+		t.Errorf("The data does not match, expected: Name: mypolicy, TargetID: %d, Description: whatever;\n result: Name: %s, TargetID: %d, Description: %s",
+			targetID, p.Name, p.TargetID, p.Description)
 	}
-	var tm = time.Now().AddDate(0, 0, -1)
-	if !p.StartTime.After(tm) {
-		t.Errorf("Unexpected start_time: %v", p.StartTime)
-	}
-
 }
 
 func TestGetRepPolicyByTarget(t *testing.T) {
@@ -1019,44 +1013,9 @@ func TestGetRepPolicyByName(t *testing.T) {
 
 }
 
-func TestDisableRepPolicy(t *testing.T) {
-	err := DisableRepPolicy(policyID)
-	if err != nil {
-		t.Errorf("Failed to disable policy, id: %d", policyID)
-	}
-	p, err := GetRepPolicy(policyID)
-	if err != nil {
-		t.Errorf("Error occurred in GetPolicy: %v, id: %d", err, policyID)
-	}
-	if p == nil {
-		t.Errorf("Unable to find a policy with id: %d", policyID)
-	}
-	if p.Enabled == 1 {
-		t.Errorf("The Enabled value of replication policy is still 1 after disabled, id: %d", policyID)
-	}
-}
-
-func TestEnableRepPolicy(t *testing.T) {
-	err := EnableRepPolicy(policyID)
-	if err != nil {
-		t.Errorf("Failed to disable policy, id: %d", policyID)
-	}
-	p, err := GetRepPolicy(policyID)
-	if err != nil {
-		t.Errorf("Error occurred in GetPolicy: %v, id: %d", err, policyID)
-	}
-	if p == nil {
-		t.Errorf("Unable to find a policy with id: %d", policyID)
-	}
-	if p.Enabled == 0 {
-		t.Errorf("The Enabled value of replication policy is still 0 after disabled, id: %d", policyID)
-	}
-}
-
 func TestAddRepPolicy2(t *testing.T) {
 	policy2 := models.RepPolicy{
 		ProjectID:   3,
-		Enabled:     0,
 		TargetID:    3,
 		Description: "whatever",
 		Name:        "mypolicy",
@@ -1073,10 +1032,6 @@ func TestAddRepPolicy2(t *testing.T) {
 	if p == nil {
 		t.Errorf("Unable to find a policy with id: %d", policyID2)
 	}
-	var tm time.Time
-	if p.StartTime.After(tm) {
-		t.Errorf("Unexpected start_time: %v", p.StartTime)
-	}
 }
 
 func TestAddRepJob(t *testing.T) {

src/common/dao/replication_job.go

@@ -106,34 +106,26 @@ func FilterRepTargets(name string) ([]*models.RepTarget, error) {
 // AddRepPolicy ...
 func AddRepPolicy(policy models.RepPolicy) (int64, error) {
 	o := GetOrmer()
-	sql := `insert into replication_policy (name, project_id, target_id, enabled, description, cron_str, start_time, creation_time, update_time ) values (?, ?, ?, ?, ?, ?, ?, ?, ?)`
-	p, err := o.Raw(sql).Prepare()
-	if err != nil {
-		return 0, err
-	}
-
+	sql := `insert into replication_policy (name, project_id, target_id, enabled, description, cron_str, creation_time, update_time, filters, replicate_deletion) 
+				values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`
 	params := []interface{}{}
-	params = append(params, policy.Name, policy.ProjectID, policy.TargetID, policy.Enabled, policy.Description, policy.CronStr)
 	now := time.Now()
-	if policy.Enabled == 1 {
-		params = append(params, now)
-	} else {
-		params = append(params, nil)
-	}
-	params = append(params, now, now)
+	params = append(params, policy.Name, policy.ProjectID, policy.TargetID, 1,
+		policy.Description, policy.Trigger, now, now, policy.Filters,
+		policy.ReplicateDeletion)
 
-	r, err := p.Exec(params...)
+	result, err := o.Raw(sql, params...).Exec()
 	if err != nil {
 		return 0, err
 	}
-	id, err := r.LastInsertId()
-	return id, err
+
+	return result.LastInsertId()
 }
 
 // GetRepPolicy ...
 func GetRepPolicy(id int64) (*models.RepPolicy, error) {
 	o := GetOrmer()
-	sql := `select * from replication_policy where id = ?`
+	sql := `select * from replication_policy where id = ? and deleted = 0`
 
 	var policy models.RepPolicy
 
@@ -154,8 +146,9 @@ func FilterRepPolicies(name string, projectID int64) ([]*models.RepPolicy, error
 	var args []interface{}
 
 	sql := `select rp.id, rp.project_id, rp.target_id, 
-				rt.name as target_name, rp.name, rp.enabled, rp.description,
-				rp.cron_str, rp.start_time, rp.creation_time, rp.update_time, 
+				rt.name as target_name, rp.name, rp.description,
+				rp.cron_str, rp.filters, rp.replicate_deletion, 
+				rp.creation_time, rp.update_time, 
 				count(rj.status) as error_job_count 
 			from replication_policy rp 
 			left join replication_target rt on rp.target_id=rt.id 
@@ -181,6 +174,7 @@ func FilterRepPolicies(name string, projectID int64) ([]*models.RepPolicy, error
 	if _, err := o.Raw(sql, args).QueryRows(&policies); err != nil {
 		return nil, err
 	}
+
 	return policies, nil
 }
 
@@ -247,7 +241,8 @@ func GetRepPolicyByProjectAndTarget(projectID, targetID int64) ([]*models.RepPol
 func UpdateRepPolicy(policy *models.RepPolicy) error {
 	o := GetOrmer()
 	policy.UpdateTime = time.Now()
-	_, err := o.Update(policy, "TargetID", "Name", "Enabled", "Description", "CronStr", "UpdateTime")
+	_, err := o.Update(policy, "ProjectID", "TargetID", "Name", "Description",
+		"Trigger", "Filters", "ReplicateDeletion", "UpdateTime")
 	return err
 }
 
@@ -263,36 +258,6 @@ func DeleteRepPolicy(id int64) error {
 	return err
 }
 
-// UpdateRepPolicyEnablement ...
-func UpdateRepPolicyEnablement(id int64, enabled int) error {
-	o := GetOrmer()
-	p := models.RepPolicy{
-		ID:         id,
-		Enabled:    enabled,
-		UpdateTime: time.Now(),
-	}
-
-	var err error
-	if enabled == 1 {
-		p.StartTime = time.Now()
-		_, err = o.Update(&p, "Enabled", "StartTime")
-	} else {
-		_, err = o.Update(&p, "Enabled")
-	}
-
-	return err
-}
-
-// EnableRepPolicy ...
-func EnableRepPolicy(id int64) error {
-	return UpdateRepPolicyEnablement(id, 1)
-}
-
-// DisableRepPolicy ...
-func DisableRepPolicy(id int64) error {
-	return UpdateRepPolicyEnablement(id, 0)
-}
-
 // AddRepJob ...
 func AddRepJob(job models.RepJob) (int64, error) {
 	o := GetOrmer()

src/common/dao/watch_item.go

@@ -0,0 +1,62 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package dao
+
+import (
+	"time"
+
+	"github.com/vmware/harbor/src/common/models"
+)
+
+// DefaultDatabaseWatchItemDAO is an instance of DatabaseWatchItemDAO
+var DefaultDatabaseWatchItemDAO WatchItemDAO = &DatabaseWatchItemDAO{}
+
+// WatchItemDAO defines operations about WatchItem
+type WatchItemDAO interface {
+	Add(*models.WatchItem) (int64, error)
+	DeleteByPolicyID(int64) error
+	Get(namespace, operation string) ([]models.WatchItem, error)
+}
+
+// DatabaseWatchItemDAO implements interface WatchItemDAO for database
+type DatabaseWatchItemDAO struct{}
+
+// Add a WatchItem
+func (d *DatabaseWatchItemDAO) Add(item *models.WatchItem) (int64, error) {
+	now := time.Now()
+	item.CreationTime = now
+	item.UpdateTime = now
+	return GetOrmer().Insert(item)
+}
+
+// DeleteByPolicyID deletes the WatchItem specified by policy ID
+func (d *DatabaseWatchItemDAO) DeleteByPolicyID(policyID int64) error {
+	_, err := GetOrmer().QueryTable(&models.WatchItem{}).Filter("PolicyID", policyID).Delete()
+	return err
+}
+
+// Get returns WatchItem list according to the namespace and operation
+func (d *DatabaseWatchItemDAO) Get(namespace, operation string) ([]models.WatchItem, error) {
+	qs := GetOrmer().QueryTable(&models.WatchItem{}).Filter("Namespace", namespace)
+	if operation == "push" {
+		qs = qs.Filter("OnPush", 1)
+	} else if operation == "delete" {
+		qs = qs.Filter("OnDeletion", 1)
+	}
+
+	items := []models.WatchItem{}
+	_, err := qs.All(&items)
+	return items, err
+}

src/common/dao/watch_item_test.go

@@ -0,0 +1,71 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package dao
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/vmware/harbor/src/common/models"
+)
+
+func TestMethodsOfWatchItem(t *testing.T) {
+	targetID, err := AddRepTarget(models.RepTarget{
+		Name: "test_target_for_watch_item",
+		URL:  "http://127.0.0.1",
+	})
+	require.Nil(t, err)
+	defer DeleteRepTarget(targetID)
+
+	policyID, err := AddRepPolicy(models.RepPolicy{
+		Name:      "test_policy_for_watch_item",
+		ProjectID: 1,
+		TargetID:  targetID,
+	})
+	require.Nil(t, err)
+	defer DeleteRepPolicy(policyID)
+
+	item := &models.WatchItem{
+		PolicyID:   policyID,
+		Namespace:  "library",
+		OnPush:     false,
+		OnDeletion: true,
+	}
+
+	// test Add
+	id, err := DefaultDatabaseWatchItemDAO.Add(item)
+	require.Nil(t, err)
+
+	// test Get: operation-push
+	items, err := DefaultDatabaseWatchItemDAO.Get("library", "push")
+	require.Nil(t, err)
+	assert.Equal(t, 0, len(items))
+
+	// test Get: operation-delete
+	items, err = DefaultDatabaseWatchItemDAO.Get("library", "delete")
+	require.Nil(t, err)
+	assert.Equal(t, 1, len(items))
+	assert.Equal(t, id, items[0].ID)
+	assert.Equal(t, "library", items[0].Namespace)
+	assert.True(t, items[0].OnDeletion)
+
+	// test DeleteByPolicyID
+	err = DefaultDatabaseWatchItemDAO.DeleteByPolicyID(policyID)
+	require.Nil(t, err)
+	items, err = DefaultDatabaseWatchItemDAO.Get("library", "delete")
+	require.Nil(t, err)
+	assert.Equal(t, 0, len(items))
+}

src/common/http/client.go

@@ -0,0 +1,162 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package http
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/vmware/harbor/src/common/http/modifier"
+)
+
+// Client is a util for common HTTP operations, such Get, Head, Post, Put and Delete.
+// Use Do instead if  those methods can not meet your requirement
+type Client struct {
+	modifiers []modifier.Modifier
+	client    *http.Client
+}
+
+// NewClient creates an instance of Client.
+// Use net/http.Client as the default value if c is nil.
+// Modifiers modify the request before sending it.
+func NewClient(c *http.Client, modifiers ...modifier.Modifier) *Client {
+	client := &Client{
+		client: c,
+	}
+	if client.client == nil {
+		client.client = &http.Client{}
+	}
+	if len(modifiers) > 0 {
+		client.modifiers = modifiers
+	}
+	return client
+}
+
+// Do ...
+func (c *Client) Do(req *http.Request) (*http.Response, error) {
+	for _, modifier := range c.modifiers {
+		if err := modifier.Modify(req); err != nil {
+			return nil, err
+		}
+	}
+
+	return c.client.Do(req)
+}
+
+// Get ...
+func (c *Client) Get(url string, v ...interface{}) error {
+	req, err := http.NewRequest(http.MethodGet, url, nil)
+	if err != nil {
+		return err
+	}
+
+	data, err := c.do(req)
+	if err != nil {
+		return err
+	}
+
+	if len(v) == 0 {
+		return nil
+	}
+
+	return json.Unmarshal(data, v[0])
+}
+
+// Head ...
+func (c *Client) Head(url string) error {
+	req, err := http.NewRequest(http.MethodHead, url, nil)
+	if err != nil {
+		return err
+	}
+	_, err = c.do(req)
+	return err
+}
+
+// Post ...
+func (c *Client) Post(url string, v ...interface{}) error {
+	var reader io.Reader
+	if len(v) > 0 {
+		data, err := json.Marshal(v[0])
+		if err != nil {
+			return err
+		}
+
+		reader = bytes.NewReader(data)
+	}
+
+	req, err := http.NewRequest(http.MethodPost, url, reader)
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	_, err = c.do(req)
+	return err
+}
+
+// Put ...
+func (c *Client) Put(url string, v ...interface{}) error {
+	var reader io.Reader
+	if len(v) > 0 {
+		data := []byte{}
+		data, err := json.Marshal(v[0])
+		if err != nil {
+			return err
+		}
+		reader = bytes.NewReader(data)
+	}
+
+	req, err := http.NewRequest(http.MethodPut, url, reader)
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	_, err = c.do(req)
+	return err
+}
+
+// Delete ...
+func (c *Client) Delete(url string) error {
+	req, err := http.NewRequest(http.MethodDelete, url, nil)
+	if err != nil {
+		return err
+	}
+	_, err = c.do(req)
+	return err
+}
+
+func (c *Client) do(req *http.Request) ([]byte, error) {
+	resp, err := c.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	data, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode < 200 || resp.StatusCode > 299 {
+		return nil, &Error{
+			Code:    resp.StatusCode,
+			Message: string(data),
+		}
+	}
+
+	return data, nil
+}

src/common/http/error.go

@@ -0,0 +1,30 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package http
+
+import (
+	"fmt"
+)
+
+// Error wrap HTTP status code and message as an error
+type Error struct {
+	Code    int
+	Message string
+}
+
+// Error ...
+func (e *Error) Error() string {
+	return fmt.Sprintf("http error: code %d, message %s", e.Code, e.Message)
+}

src/common/http/modifier/auth/auth.go

@@ -0,0 +1,54 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package auth
+
+import (
+	"errors"
+	"net/http"
+
+	"github.com/vmware/harbor/src/common/http/modifier"
+)
+
+const (
+	secretCookieName = "secret"
+)
+
+// Authorizer is a kind of Modifier used to authorize the requests
+type Authorizer modifier.Modifier
+
+// SecretAuthorizer authorizes the requests with the specified secret
+type SecretAuthorizer struct {
+	secret string
+}
+
+// NewSecretAuthorizer returns an instance of SecretAuthorizer
+func NewSecretAuthorizer(secret string) *SecretAuthorizer {
+	return &SecretAuthorizer{
+		secret: secret,
+	}
+}
+
+// Modify the request by adding secret authentication information
+func (s *SecretAuthorizer) Modify(req *http.Request) error {
+	if req == nil {
+		return errors.New("the request is null")
+	}
+
+	req.AddCookie(&http.Cookie{
+		Name:  secretCookieName,
+		Value: s.secret,
+	})
+	return nil
+}

src/common/http/modifier/auth/auth_test.go

@@ -1,4 +1,3 @@
-// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -19,25 +18,22 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
-func TestAuthorize(t *testing.T) {
-	cookieName := "secret"
+func TestAuthorizeOfSecretAuthorizer(t *testing.T) {
 	secret := "secret"
-	authorizer := NewSecretAuthorizer(cookieName, secret)
+	authorizer := NewSecretAuthorizer(secret)
+
+	// nil request
+	require.NotNil(t, authorizer.Modify(nil))
+
+	// valid request
 	req, err := http.NewRequest("", "", nil)
-	if !assert.Nil(t, err, "unexpected error") {
-		return
-	}
-
-	err = authorizer.Authorize(req)
-	if !assert.Nil(t, err, "unexpected error") {
-		return
-	}
-
-	cookie, err := req.Cookie(cookieName)
-	if !assert.Nil(t, err, "unexpected error") {
-		return
-	}
-	assert.Equal(t, secret, cookie.Value, "unexpected cookie")
+	require.Nil(t, err)
+	require.Nil(t, authorizer.Modify(req))
+	require.Equal(t, 1, len(req.Cookies()))
+	v, err := req.Cookie(secretCookieName)
+	require.Nil(t, err)
+	assert.Equal(t, secret, v.Value)
 }

src/common/http/modifier/modifier.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package registry
+package modifier
 
 import (
 	"net/http"

src/common/models/base.go

@@ -30,6 +30,7 @@ func init() {
 		new(RepoRecord),
 		new(ImgScanOverview),
 		new(ClairVulnTimestamp),
+		new(WatchItem),
 		new(ProjectMetadata),
-	    new(ConfigEntry))
+		new(ConfigEntry))
 }

src/common/models/replication_job.go

@@ -38,48 +38,17 @@ const (
 
 // RepPolicy is the model for a replication policy, which associate to a project and a target (destination)
 type RepPolicy struct {
-	ID          int64  `orm:"pk;auto;column(id)" json:"id"`
-	ProjectID   int64  `orm:"column(project_id)" json:"project_id"`
-	ProjectName string `json:"project_name,omitempty"`
-	TargetID    int64  `orm:"column(target_id)" json:"target_id"`
-	TargetName  string `json:"target_name,omitempty"`
-	Name        string `orm:"column(name)" json:"name"`
-	//	Target       RepTarget `orm:"-" json:"target"`
-	Enabled       int       `orm:"column(enabled)" json:"enabled"`
-	Description   string    `orm:"column(description)" json:"description"`
-	CronStr       string    `orm:"column(cron_str)" json:"cron_str"`
-	StartTime     time.Time `orm:"column(start_time)" json:"start_time"`
-	CreationTime  time.Time `orm:"column(creation_time);auto_now_add" json:"creation_time"`
-	UpdateTime    time.Time `orm:"column(update_time);auto_now" json:"update_time"`
-	ErrorJobCount int       `json:"error_job_count"`
-	Deleted       int       `orm:"column(deleted)" json:"deleted"`
-}
-
-// Valid ...
-func (r *RepPolicy) Valid(v *validation.Validation) {
-	if len(r.Name) == 0 {
-		v.SetError("name", "can not be empty")
-	}
-
-	if len(r.Name) > 256 {
-		v.SetError("name", "max length is 256")
-	}
-
-	if r.ProjectID <= 0 {
-		v.SetError("project_id", "invalid")
-	}
-
-	if r.TargetID <= 0 {
-		v.SetError("target_id", "invalid")
-	}
-
-	if r.Enabled != 0 && r.Enabled != 1 {
-		v.SetError("enabled", "must be 0 or 1")
-	}
-
-	if len(r.CronStr) > 256 {
-		v.SetError("cron_str", "max length is 256")
-	}
+	ID                int64     `orm:"pk;auto;column(id)"`
+	ProjectID         int64     `orm:"column(project_id)" `
+	TargetID          int64     `orm:"column(target_id)"`
+	Name              string    `orm:"column(name)"`
+	Description       string    `orm:"column(description)"`
+	Trigger           string    `orm:"column(cron_str)"`
+	Filters           string    `orm:"column(filters)"`
+	ReplicateDeletion bool      `orm:"column(replicate_deletion)"`
+	CreationTime      time.Time `orm:"column(creation_time);auto_now_add"`
+	UpdateTime        time.Time `orm:"column(update_time);auto_now"`
+	Deleted           int       `orm:"column(deleted)"`
 }
 
 // RepJob is the model for a replication job, which is the execution unit on job service, currently it is used to transfer/remove

src/common/models/watch_item.go

@@ -0,0 +1,35 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package models
+
+import (
+	"time"
+)
+
+// WatchItem ...
+type WatchItem struct {
+	ID           int64     `orm:"pk;auto;column(id)" json:"id"`
+	PolicyID     int64     `orm:"column(policy_id)" json:"policy_id"`
+	Namespace    string    `orm:"column(namespace)" json:"namespace"`
+	OnDeletion   bool      `orm:"column(on_deletion)" json:"on_deletion"`
+	OnPush       bool      `orm:"column(on_push)" json:"on_push"`
+	CreationTime time.Time `orm:"column(creation_time)" json:"creation_time"`
+	UpdateTime   time.Time `orm:"column(update_time)" json:"update_time"`
+}
+
+//TableName ...
+func (w *WatchItem) TableName() string {
+	return "replication_immediate_trigger"
+}

src/common/notifier/notifier_test.go

@@ -39,6 +39,7 @@ func (fsh *fakeStatelessHandler) Handle(v interface{}) error {
 }
 
 func TestSubscribeAndUnSubscribe(t *testing.T) {
+	count := len(notificationWatcher.handlers)
 	err := Subscribe("topic1", &fakeStatefulHandler{0})
 	if err != nil {
 		t.Fatal(err)
@@ -59,7 +60,7 @@ func TestSubscribeAndUnSubscribe(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if len(notificationWatcher.handlers) != 2 {
+	if len(notificationWatcher.handlers) != (count + 2) {
 		t.Fail()
 	}
 
@@ -94,7 +95,7 @@ func TestSubscribeAndUnSubscribe(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if len(notificationWatcher.handlers) != 1 {
+	if len(notificationWatcher.handlers) != (count + 1) {
 		t.Fail()
 	}
 
@@ -103,12 +104,13 @@ func TestSubscribeAndUnSubscribe(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if len(notificationWatcher.handlers) != 0 {
+	if len(notificationWatcher.handlers) != count {
 		t.Fail()
 	}
 }
 
 func TestPublish(t *testing.T) {
+	count := len(notificationWatcher.handlers)
 	err := Subscribe("topic1", &fakeStatefulHandler{0})
 	if err != nil {
 		t.Fatal(err)
@@ -119,7 +121,7 @@ func TestPublish(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if len(notificationWatcher.handlers) != 2 {
+	if len(notificationWatcher.handlers) != (count + 2) {
 		t.Fail()
 	}
 
@@ -149,12 +151,13 @@ func TestPublish(t *testing.T) {
 }
 
 func TestConcurrentPublish(t *testing.T) {
+	count := len(notificationWatcher.handlers)
 	err := Subscribe("topic1", &fakeStatefulHandler{0})
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	if len(notificationWatcher.handlers) != 1 {
+	if len(notificationWatcher.handlers) != (count + 1) {
 		t.Fail()
 	}
 
@@ -186,11 +189,12 @@ func TestConcurrentPublishWithScanPolicyHandler(t *testing.T) {
 		t.Fatal("Policy scheduler is not started")
 	}
 
+	count := len(notificationWatcher.handlers)
 	if err := Subscribe("testing_topic", &ScanPolicyNotificationHandler{}); err != nil {
 		t.Fatal(err.Error())
 	}
-	if len(notificationWatcher.handlers) != 1 {
-		t.Fatal("Handler is not registered")
+	if len(notificationWatcher.handlers) != (count + 1) {
+		t.Fatalf("Handler is not registered")
 	}
 
 	utcTime := time.Now().UTC().Unix()
@@ -209,7 +213,7 @@ func TestConcurrentPublishWithScanPolicyHandler(t *testing.T) {
 		t.Fatal(err.Error())
 	}
 
-	if len(notificationWatcher.handlers) != 0 {
+	if len(notificationWatcher.handlers) != count {
 		t.Fatal("Handler is not unregistered")
 	}
 

src/common/notifier/scan_policy_notitification_handler.go

@@ -63,7 +63,7 @@ func (s *ScanPolicyNotificationHandler) Handle(value interface{}) error {
 
 		//To check and compare if the related parameter is changed.
 		if pl := scheduler.DefaultScheduler.GetPolicy(alternatePolicy); pl != nil {
-			policyCandidate := policy.NewAlternatePolicy(&policy.AlternatePolicyConfiguration{
+			policyCandidate := policy.NewAlternatePolicy(alternatePolicy, &policy.AlternatePolicyConfiguration{
 				Duration:   24 * time.Hour,
 				OffsetTime: notification.DailyTime,
 			})
@@ -95,7 +95,7 @@ func (s *ScanPolicyNotificationHandler) Handle(value interface{}) error {
 
 //Schedule policy.
 func schedulePolicy(notification ScanPolicyNotification) error {
-	schedulePolicy := policy.NewAlternatePolicy(&policy.AlternatePolicyConfiguration{
+	schedulePolicy := policy.NewAlternatePolicy(alternatePolicy, &policy.AlternatePolicyConfiguration{
 		Duration:   24 * time.Hour,
 		OffsetTime: notification.DailyTime,
 	})

src/common/scheduler/policy/alternate_policy.go

@@ -10,11 +10,22 @@ import (
 	"github.com/vmware/harbor/src/common/utils/log"
 )
 
+const (
+	oneDay = 24 * 3600
+)
+
 //AlternatePolicyConfiguration store the related configurations for alternate policy.
 type AlternatePolicyConfiguration struct {
 	//Duration is the interval of executing attached tasks.
+	//E.g: 24*3600 for daily
+	//     7*24*3600 for weekly
 	Duration time.Duration
 
+	//An integer to indicate the the weekday of the week. Please be noted that Sunday is 7.
+	//Use default value 0 to indicate weekday is not set.
+	//To support by weekly function.
+	Weekday int8
+
 	//OffsetTime is the execution time point of each turn
 	//It's a number to indicate the seconds offset to the 00:00 of UTC time.
 	OffsetTime int64
@@ -42,16 +53,21 @@ type AlternatePolicy struct {
 
 	//Channel used to receive terminate signal.
 	terminator chan bool
+
+	//Unique name of this policy to support multiple instances
+	name string
 }
 
 //NewAlternatePolicy is constructor of creating AlternatePolicy.
-func NewAlternatePolicy(config *AlternatePolicyConfiguration) *AlternatePolicy {
+//Accept name and configuration as parameters.
+func NewAlternatePolicy(name string, config *AlternatePolicyConfiguration) *AlternatePolicy {
 	return &AlternatePolicy{
 		RWMutex:    new(sync.RWMutex),
 		tasks:      task.NewDefaultStore(),
 		config:     config,
 		isEnabled:  false,
 		terminator: make(chan bool),
+		name:       name,
 	}
 }
 
@@ -62,7 +78,7 @@ func (alp *AlternatePolicy) GetConfig() *AlternatePolicyConfiguration {
 
 //Name is an implementation of same method in policy interface.
 func (alp *AlternatePolicy) Name() string {
-	return "Alternate Policy"
+	return alp.name
 }
 
 //Tasks is an implementation of same method in policy interface.
@@ -110,6 +126,11 @@ func (alp *AlternatePolicy) Evaluate() (<-chan bool, error) {
 	defer alp.Unlock()
 	alp.Lock()
 
+	//Check if configuration is valid
+	if !alp.isValidConfig() {
+		return nil, errors.New("Policy configuration is not valid")
+	}
+
 	//Check if policy instance is still running
 	if alp.isEnabled {
 		return nil, fmt.Errorf("Instance of policy %s is still running", alp.Name())
@@ -124,19 +145,41 @@ func (alp *AlternatePolicy) Evaluate() (<-chan bool, error) {
 	alp.evaluation = make(chan bool)
 
 	go func() {
+		var (
+			waitingTime int64
+		)
 		timeNow := time.Now().UTC()
 
 		//Reach the execution time point?
+		//Weekday is set
+		if alp.config.Weekday > 0 {
+			targetWeekday := (alp.config.Weekday + 7) % 7
+			currentWeekday := timeNow.Weekday()
+			weekdayDiff := (int)(targetWeekday - (int8)(currentWeekday))
+			if weekdayDiff < 0 {
+				weekdayDiff += 7
+			}
+			waitingTime = (int64)(weekdayDiff * oneDay)
+		}
+
+		//Time
 		utcTime := (int64)(timeNow.Hour()*3600 + timeNow.Minute()*60)
 		diff := alp.config.OffsetTime - utcTime
-		if diff < 0 {
-			diff += 24 * 3600
+		if waitingTime > 0 {
+			waitingTime += diff
+		} else {
+			waitingTime = diff
+			if waitingTime < 0 {
+				waitingTime += oneDay
+			}
 		}
-		if diff > 0 {
+
+		//Let's wait for a while
+		if waitingTime > 0 {
 			//Wait for a while.
 			log.Infof("Waiting for %d seconds after comparing offset %d and utc time %d\n", diff, alp.config.OffsetTime, utcTime)
 			select {
-			case <-time.After(time.Duration(diff) * time.Second):
+			case <-time.After(time.Duration(waitingTime) * time.Second):
 			case <-alp.terminator:
 				return
 			}
@@ -188,7 +231,10 @@ func (alp *AlternatePolicy) Equal(p Policy) bool {
 		return false
 	}
 
-	return cfg == nil || (cfg.Duration == cfg2.Duration && cfg.OffsetTime == cfg2.OffsetTime)
+	return cfg == nil ||
+		(cfg.Duration == cfg2.Duration &&
+			cfg.OffsetTime == cfg2.OffsetTime &&
+			cfg.Weekday == cfg2.Weekday)
 }
 
 //IsEnabled is an implementation of same method in policy interface.
@@ -198,3 +244,8 @@ func (alp *AlternatePolicy) IsEnabled() bool {
 
 	return alp.isEnabled
 }
+
+//Check if the config is valid. At least it should have the configurations for supporting daily policy.
+func (alp *AlternatePolicy) isValidConfig() bool {
+	return alp.config != nil && alp.config.Duration > 0 && alp.config.OffsetTime >= 0
+}

src/common/scheduler/policy/alternate_policy_test.go

@@ -6,6 +6,10 @@ import (
 	"time"
 )
 
+const (
+	testPolicyName = "TestingPolicy"
+)
+
 type fakeTask struct {
 	number int32
 }
@@ -24,18 +28,18 @@ func (ft *fakeTask) Number() int32 {
 }
 
 func TestBasic(t *testing.T) {
-	tp := NewAlternatePolicy(&AlternatePolicyConfiguration{})
+	tp := NewAlternatePolicy(testPolicyName, &AlternatePolicyConfiguration{})
 	err := tp.AttachTasks(&fakeTask{number: 100})
 	if err != nil {
 		t.Fail()
 	}
 
 	if tp.GetConfig() == nil {
-		t.Fail()
+		t.Fatal("nil config")
 	}
 
-	if tp.Name() != "Alternate Policy" {
-		t.Fail()
+	if tp.Name() != testPolicyName {
+		t.Fatalf("Wrong name %s", tp.Name())
 	}
 
 	tks := tp.Tasks()
@@ -48,7 +52,7 @@ func TestBasic(t *testing.T) {
 func TestEvaluatePolicy(t *testing.T) {
 	now := time.Now().UTC()
 	utcOffset := (int64)(now.Hour()*3600 + now.Minute()*60)
-	tp := NewAlternatePolicy(&AlternatePolicyConfiguration{
+	tp := NewAlternatePolicy(testPolicyName, &AlternatePolicyConfiguration{
 		Duration:   1 * time.Second,
 		OffsetTime: utcOffset + 1,
 	})
@@ -78,7 +82,7 @@ func TestEvaluatePolicy(t *testing.T) {
 func TestDisablePolicy(t *testing.T) {
 	now := time.Now().UTC()
 	utcOffset := (int64)(now.Hour()*3600 + now.Minute()*60)
-	tp := NewAlternatePolicy(&AlternatePolicyConfiguration{
+	tp := NewAlternatePolicy(testPolicyName, &AlternatePolicyConfiguration{
 		Duration:   1 * time.Second,
 		OffsetTime: utcOffset + 1,
 	})
@@ -118,3 +122,28 @@ func TestDisablePolicy(t *testing.T) {
 		t.Fatalf("Policy is still running after calling Disable() %d=%d", atomic.LoadInt32(&copiedCounter), atomic.LoadInt32(&counter))
 	}
 }
+
+func TestPolicyEqual(t *testing.T) {
+	tp1 := NewAlternatePolicy(testPolicyName, &AlternatePolicyConfiguration{
+		Duration:   1 * time.Second,
+		OffsetTime: 8000,
+	})
+
+	tp2 := NewAlternatePolicy(testPolicyName+"2", &AlternatePolicyConfiguration{
+		Duration:   100 * time.Second,
+		OffsetTime: 8000,
+	})
+
+	if tp1.Equal(tp2) {
+		t.Fatal("tp1 should not equal tp2")
+	}
+
+	tp3 := NewAlternatePolicy(testPolicyName, &AlternatePolicyConfiguration{
+		Duration:   1 * time.Second,
+		OffsetTime: 8000,
+	})
+
+	if !tp1.Equal(tp3) {
+		t.Fatal("tp1 should equal tp3")
+	}
+}

src/common/scheduler/policy/policy.go

@@ -15,6 +15,7 @@ import (
 //
 type Policy interface {
 	//Name will return the name of the policy.
+	//If the policy supports multiple instances, please make sure the name is unique as an UUID.
 	Name() string
 
 	//Tasks will return the attached tasks with this policy.

src/common/scheduler/policy/uuid.go

@@ -0,0 +1,22 @@
+package policy
+
+import (
+	"crypto/rand"
+	"fmt"
+	"io"
+)
+
+//NewUUID will generate a new UUID.
+//Code copied from https://play.golang.org/p/4FkNSiUDMg
+func newUUID() (string, error) {
+	uuid := make([]byte, 16)
+	n, err := io.ReadFull(rand.Reader, uuid)
+	if n != len(uuid) || err != nil {
+		return "", err
+	}
+
+	uuid[8] = uuid[8]&^0xc0 | 0x80
+	uuid[6] = uuid[6]&^0xf0 | 0x40
+
+	return fmt.Sprintf("%x-%x-%x-%x-%x", uuid[0:4], uuid[4:6], uuid[6:8], uuid[8:10], uuid[10:]), nil
+}

src/common/scheduler/task/replication/replication_task.go

@@ -0,0 +1,31 @@
+package replication
+
+import (
+	"github.com/vmware/harbor/src/common/notifier"
+	"github.com/vmware/harbor/src/replication/event/notification"
+	"github.com/vmware/harbor/src/replication/event/topic"
+)
+
+//Task is the task for triggering one replication
+type Task struct {
+	PolicyID int64
+}
+
+//NewTask is constructor of creating ReplicationTask
+func NewTask(policyID int64) *Task {
+	return &Task{
+		PolicyID: policyID,
+	}
+}
+
+//Name returns the name of this task
+func (t *Task) Name() string {
+	return "replication"
+}
+
+//Run the actions here
+func (t *Task) Run() error {
+	return notifier.Publish(topic.StartReplicationTopic, notification.StartReplicationNotification{
+		PolicyID: t.PolicyID,
+	})
+}

src/common/scheduler/task/replication/replication_task_test.go

@@ -0,0 +1,14 @@
+package replication
+
+import "testing"
+
+func TestTask(t *testing.T) {
+	tk := NewTask(1)
+	if tk == nil {
+		t.Fail()
+	}
+
+	if tk.Name() != "replication" {
+		t.Fail()
+	}
+}

src/common/scheduler/task/scan_all_task_test.go

@@ -4,7 +4,7 @@ import (
 	"testing"
 )
 
-func TestTask(t *testing.T) {
+func TestScanAllTask(t *testing.T) {
 	tk := NewScanAllTask()
 	if tk == nil {
 		t.Fail()

src/common/utils/registry/auth/tokenauthorizer.go

@@ -23,9 +23,9 @@ import (
 	"time"
 
 	"github.com/docker/distribution/registry/auth/token"
+	"github.com/vmware/harbor/src/common/http/modifier"
 	"github.com/vmware/harbor/src/common/models"
 	"github.com/vmware/harbor/src/common/utils/log"
-	"github.com/vmware/harbor/src/common/utils/registry"
 	token_util "github.com/vmware/harbor/src/ui/service/token"
 )
 
@@ -254,7 +254,7 @@ func ping(client *http.Client, endpoint string) (string, string, error) {
 // from token server and add it to the origin request
 // If customizedTokenService is set, the token request will be sent to it instead of the server get from authorizer
 func NewStandardTokenAuthorizer(client *http.Client, credential Credential,
-	customizedTokenService ...string) registry.Modifier {
+	customizedTokenService ...string) modifier.Modifier {
 	generator := &standardTokenGenerator{
 		credential: credential,
 		client:     client,
@@ -309,7 +309,7 @@ func (s *standardTokenGenerator) generate(scopes []*token.ResourceActions, endpo
 
 // NewRawTokenAuthorizer returns a token authorizer which calls method to create
 // token directly
-func NewRawTokenAuthorizer(username, service string) registry.Modifier {
+func NewRawTokenAuthorizer(username, service string) modifier.Modifier {
 	generator := &rawTokenGenerator{
 		service:  service,
 		username: username,

src/common/utils/registry/transport.go

@@ -17,17 +17,18 @@ package registry
 import (
 	"net/http"
 
+	"github.com/vmware/harbor/src/common/http/modifier"
 	"github.com/vmware/harbor/src/common/utils/log"
 )
 
 // Transport holds information about base transport and modifiers
 type Transport struct {
 	transport http.RoundTripper
-	modifiers []Modifier
+	modifiers []modifier.Modifier
 }
 
 // NewTransport ...
-func NewTransport(transport http.RoundTripper, modifiers ...Modifier) *Transport {
+func NewTransport(transport http.RoundTripper, modifiers ...modifier.Modifier) *Transport {
 	return &Transport{
 		transport: transport,
 		modifiers: modifiers,

src/common/utils/test/policy_manager.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package test
+
+import (
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+type FakePolicyManager struct {
+}
+
+func (f *FakePolicyManager) GetPolicies(query models.QueryParameter) ([]models.ReplicationPolicy, error) {
+	return []models.ReplicationPolicy{}, nil
+}
+
+func (f *FakePolicyManager) GetPolicy(id int64) (models.ReplicationPolicy, error) {
+	return models.ReplicationPolicy{
+		ID: 1,
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindManual,
+		},
+	}, nil
+}
+func (f *FakePolicyManager) CreatePolicy(policy models.ReplicationPolicy) (int64, error) {
+	return 1, nil
+}
+func (f *FakePolicyManager) UpdatePolicy(models.ReplicationPolicy) error {
+	return nil
+}
+func (f *FakePolicyManager) RemovePolicy(int64) error {
+	return nil
+}

src/common/utils/test/replication_controllter.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package test
+
+type FakeReplicatoinController struct {
+	FakePolicyManager
+}
+
+func (f *FakeReplicatoinController) Init() error {
+	return nil
+}
+func (f *FakeReplicatoinController) Replicate(policyID int64, metadata ...map[string]interface{}) error {
+	return nil
+}

src/common/utils/test/watch_item.go

@@ -0,0 +1,65 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package test
+
+import (
+	"github.com/vmware/harbor/src/common/models"
+)
+
+// FakeWatchItemDAO is the fake implement for the dao.WatchItemDAO
+type FakeWatchItemDAO struct {
+	items []models.WatchItem
+}
+
+// Add ...
+func (f *FakeWatchItemDAO) Add(item *models.WatchItem) (int64, error) {
+	f.items = append(f.items, *item)
+	return int64(len(f.items) + 1), nil
+}
+
+// DeleteByPolicyID : delete the WatchItem specified by policy ID
+func (f *FakeWatchItemDAO) DeleteByPolicyID(policyID int64) error {
+	for i, item := range f.items {
+		if item.PolicyID == policyID {
+			f.items = append(f.items[:i], f.items[i+1:]...)
+			break
+		}
+	}
+	return nil
+}
+
+// Get returns WatchItem list according to the namespace and operation
+func (f *FakeWatchItemDAO) Get(namespace, operation string) ([]models.WatchItem, error) {
+	items := []models.WatchItem{}
+	for _, item := range f.items {
+		if item.Namespace != namespace {
+			continue
+		}
+
+		if operation == "push" {
+			if item.OnPush {
+				items = append(items, item)
+			}
+		}
+
+		if operation == "delete" {
+			if item.OnDeletion {
+				items = append(items, item)
+			}
+		}
+	}
+
+	return items, nil
+}

src/jobservice/client/client.go

@@ -0,0 +1,76 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package client
+
+import (
+	"github.com/vmware/harbor/src/common/http"
+	"github.com/vmware/harbor/src/common/http/modifier/auth"
+)
+
+// Replication holds information for submiting a replication job
+type Replication struct {
+	PolicyID   int64    `json:"policy_id"`
+	Repository string   `json:"repository"`
+	Operation  string   `json:"operation"`
+	Tags       []string `json:"tags"`
+}
+
+// Client defines the methods that a jobservice client should implement
+type Client interface {
+	SubmitReplicationJob(*Replication) error
+	StopReplicationJobs(policyID int64) error
+}
+
+// DefaultClient provides a default implement for the interface Client
+type DefaultClient struct {
+	endpoint string
+	client   *http.Client
+}
+
+// Config contains configuration items needed for DefaultClient
+type Config struct {
+	Secret string
+}
+
+// NewDefaultClient returns an instance of DefaultClient
+func NewDefaultClient(endpoint string, cfg *Config) *DefaultClient {
+	c := &DefaultClient{
+		endpoint: endpoint,
+	}
+
+	if cfg != nil {
+		c.client = http.NewClient(nil, auth.NewSecretAuthorizer(cfg.Secret))
+	}
+
+	return c
+}
+
+// SubmitReplicationJob submits a replication job to the jobservice
+func (d *DefaultClient) SubmitReplicationJob(replication *Replication) error {
+	url := d.endpoint + "/api/jobs/replication"
+	return d.client.Post(url, replication)
+}
+
+// StopReplicationJobs stop replication jobs of the policy specified by the policy ID
+func (d *DefaultClient) StopReplicationJobs(policyID int64) error {
+	url := d.endpoint + "/api/jobs/replication/actions"
+	return d.client.Post(url, &struct {
+		PolicyID int64  `json:"policy_id"`
+		Action   string `json:"action"`
+	}{
+		PolicyID: policyID,
+		Action:   "stop",
+	})
+}

src/jobservice/client/client_test.go

@@ -0,0 +1,86 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package client
+
+import (
+	"encoding/json"
+	"net/http"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/common/utils/test"
+)
+
+var url string
+
+func TestMain(m *testing.M) {
+	requestMapping := []*test.RequestHandlerMapping{
+		&test.RequestHandlerMapping{
+			Method:  http.MethodPost,
+			Pattern: "/api/jobs/replication/actions",
+			Handler: func(w http.ResponseWriter, r *http.Request) {
+				action := &struct {
+					PolicyID int64  `json:"policy_id"`
+					Action   string `json:"action"`
+				}{}
+				if err := json.NewDecoder(r.Body).Decode(action); err != nil {
+					w.WriteHeader(http.StatusInternalServerError)
+					return
+				}
+
+				if action.PolicyID != 1 {
+					w.WriteHeader(http.StatusNotFound)
+					return
+				}
+
+			},
+		},
+		&test.RequestHandlerMapping{
+			Method:  http.MethodPost,
+			Pattern: "/api/jobs/replication",
+			Handler: func(w http.ResponseWriter, r *http.Request) {
+				replication := &Replication{}
+				if err := json.NewDecoder(r.Body).Decode(replication); err != nil {
+					w.WriteHeader(http.StatusInternalServerError)
+				}
+			},
+		},
+	}
+	server := test.NewServer(requestMapping...)
+	defer server.Close()
+
+	url = server.URL
+
+	os.Exit(m.Run())
+}
+
+func TestSubmitReplicationJob(t *testing.T) {
+	client := NewDefaultClient(url, &Config{})
+	err := client.SubmitReplicationJob(&Replication{})
+	assert.Nil(t, err)
+}
+
+func TestStopReplicationJobs(t *testing.T) {
+	client := NewDefaultClient(url, &Config{})
+
+	// 404
+	err := client.StopReplicationJobs(2)
+	assert.NotNil(t, err)
+
+	// 200
+	err = client.StopReplicationJobs(1)
+	assert.Nil(t, err)
+}

src/jobservice/config/config.go

@@ -20,7 +20,6 @@ import (
 	"strings"
 
 	"github.com/vmware/harbor/src/adminserver/client"
-	"github.com/vmware/harbor/src/adminserver/client/auth"
 	"github.com/vmware/harbor/src/common"
 	comcfg "github.com/vmware/harbor/src/common/config"
 	"github.com/vmware/harbor/src/common/models"
@@ -50,8 +49,10 @@ func Init() error {
 		adminServerURL = "http://adminserver"
 	}
 	log.Infof("initializing client for adminserver %s ...", adminServerURL)
-	authorizer := auth.NewSecretAuthorizer(secretCookieName, UISecret())
-	AdminserverClient = client.NewClient(adminServerURL, authorizer)
+	cfg := &client.Config{
+		Secret: UISecret(),
+	}
+	AdminserverClient = client.NewClient(adminServerURL, cfg)
 	if err := AdminserverClient.Ping(); err != nil {
 		return fmt.Errorf("failed to ping adminserver: %v", err)
 	}

src/jobservice/job/job_test.go

@@ -105,7 +105,6 @@ func TestRepJob(t *testing.T) {
 	assert.Nil(err)
 	j, err := dao.GetRepJob(repJobID)
 	assert.Equal(models.JobRetrying, j.Status)
-	assert.Equal(1, rj.parm.Enabled)
 	assert.False(rj.parm.Insecure)
 	rj2 := NewRepJob(99999)
 	err = rj2.Init()
@@ -163,7 +162,6 @@ func prepareRepJobData() error {
 	}
 	policy := models.RepPolicy{
 		ProjectID:   1,
-		Enabled:     1,
 		TargetID:    targetID,
 		Description: "whatever",
 		Name:        "mypolicy",

src/jobservice/job/jobs.go

@@ -62,7 +62,6 @@ type RepJobParm struct {
 	TargetPassword string
 	Repository     string
 	Tags           []string
-	Enabled        int
 	Operation      string
 	Insecure       bool
 }
@@ -124,13 +123,8 @@ func (rj *RepJob) Init() error {
 		LocalRegURL: regURL,
 		Repository:  job.Repository,
 		Tags:        job.TagList,
-		Enabled:     policy.Enabled,
 		Operation:   job.Operation,
 	}
-	if policy.Enabled == 0 {
-		//worker will cancel this job
-		return nil
-	}
 	target, err := dao.GetRepTarget(policy.TargetID)
 	if err != nil {
 		return fmt.Errorf("Failed to get target, error: %v", err)

src/jobservice/job/statemachine.go

@@ -208,16 +208,6 @@ func (sm *SM) Reset(j Job) error {
 }
 
 func (sm *SM) kickOff() error {
-	if repJob, ok := sm.CurrentJob.(*RepJob); ok {
-		if repJob.parm.Enabled == 0 {
-			log.Debugf("The policy of job:%v is disabled, will cancel the job", repJob)
-			_, err := sm.EnterState(models.JobCanceled)
-			if err != nil {
-				log.Warningf("For job: %v, failed to update state to 'canceled', error: %v", repJob, err)
-			}
-			return err
-		}
-	}
 	log.Debugf("In kickOff: will start job: %v", sm.CurrentJob)
 	sm.Start(models.JobRunning)
 	return nil

src/replication/consts.go

@@ -0,0 +1,25 @@
+package replication
+
+const (
+	//FilterItemKindProject : Kind of filter item is 'project'
+	FilterItemKindProject = "project"
+	//FilterItemKindRepository : Kind of filter item is 'repository'
+	FilterItemKindRepository = "repository"
+	//FilterItemKindTag : Kind of filter item is 'tag'
+	FilterItemKindTag = "tag"
+
+	//AdaptorKindHarbor : Kind of adaptor of Harbor
+	AdaptorKindHarbor = "Harbor"
+
+	//TriggerKindImmediate : Kind of trigger is 'Immediate'
+	TriggerKindImmediate = "immediate"
+	//TriggerKindSchedule : Kind of trigger is 'Schedule'
+	TriggerKindSchedule = "schedule"
+	//TriggerKindManual : Kind of trigger is 'Manual'
+	TriggerKindManual = "manual"
+
+	//TriggerScheduleDaily : type of scheduling is 'daily'
+	TriggerScheduleDaily = "daily"
+	//TriggerScheduleWeekly : type of scheduling is 'weekly'
+	TriggerScheduleWeekly = "weekly"
+)

src/replication/core/controller.go

@@ -0,0 +1,319 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package core
+
+import (
+	"fmt"
+	"strings"
+
+	common_models "github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/jobservice/client"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/policy"
+	"github.com/vmware/harbor/src/replication/replicator"
+	"github.com/vmware/harbor/src/replication/source"
+	"github.com/vmware/harbor/src/replication/target"
+	"github.com/vmware/harbor/src/replication/trigger"
+	"github.com/vmware/harbor/src/ui/config"
+)
+
+// Controller defines the methods that a replicatoin controllter should implement
+type Controller interface {
+	policy.Manager
+	Init() error
+	Replicate(policyID int64, metadata ...map[string]interface{}) error
+}
+
+//DefaultController is core module to cordinate and control the overall workflow of the
+//replication modules.
+type DefaultController struct {
+	//Indicate whether the controller has been initialized or not
+	initialized bool
+
+	//Manage the policies
+	policyManager policy.Manager
+
+	//Manage the targets
+	targetManager target.Manager
+
+	//Handle the things related with source
+	sourcer *source.Sourcer
+
+	//Manage the triggers of policies
+	triggerManager *trigger.Manager
+
+	//Handle the replication work
+	replicator replicator.Replicator
+}
+
+//Keep controller as singleton instance
+var (
+	GlobalController Controller
+)
+
+//ControllerConfig includes related configurations required by the controller
+type ControllerConfig struct {
+	//The capacity of the cache storing enabled triggers
+	CacheCapacity int
+}
+
+//NewDefaultController is the constructor of DefaultController.
+func NewDefaultController(cfg ControllerConfig) *DefaultController {
+	//Controller refer the default instances
+	ctl := &DefaultController{
+		policyManager:  policy.NewDefaultManager(),
+		targetManager:  target.NewDefaultManager(),
+		sourcer:        source.NewSourcer(),
+		triggerManager: trigger.NewManager(cfg.CacheCapacity),
+	}
+
+	ctl.replicator = replicator.NewDefaultReplicator(config.GlobalJobserviceClient)
+
+	return ctl
+}
+
+// Init creates the GlobalController and inits it
+func Init() error {
+	GlobalController = NewDefaultController(ControllerConfig{}) //Use default data
+	return GlobalController.Init()
+}
+
+//Init will initialize the controller and the sub components
+func (ctl *DefaultController) Init() error {
+	if ctl.initialized {
+		return nil
+	}
+
+	//Build query parameters
+	query := models.QueryParameter{
+		TriggerType: replication.TriggerKindSchedule,
+	}
+
+	policies, err := ctl.policyManager.GetPolicies(query)
+	if err != nil {
+		return err
+	}
+	if policies != nil && len(policies) > 0 {
+		for _, policy := range policies {
+			if err := ctl.triggerManager.SetupTrigger(&policy); err != nil {
+				log.Errorf("failed to setup trigger for policy %v: %v", policy, err)
+			}
+		}
+	}
+
+	//Initialize sourcer
+	ctl.sourcer.Init()
+
+	ctl.initialized = true
+
+	return nil
+}
+
+//CreatePolicy is used to create a new policy and enable it if necessary
+func (ctl *DefaultController) CreatePolicy(newPolicy models.ReplicationPolicy) (int64, error) {
+	id, err := ctl.policyManager.CreatePolicy(newPolicy)
+	if err != nil {
+		return 0, err
+	}
+
+	newPolicy.ID = id
+	if err = ctl.triggerManager.SetupTrigger(&newPolicy); err != nil {
+		return 0, err
+	}
+
+	return id, nil
+}
+
+//UpdatePolicy will update the policy with new content.
+//Parameter updatedPolicy must have the ID of the updated policy.
+func (ctl *DefaultController) UpdatePolicy(updatedPolicy models.ReplicationPolicy) error {
+	id := updatedPolicy.ID
+	originPolicy, err := ctl.policyManager.GetPolicy(id)
+	if err != nil {
+		return err
+	}
+
+	if originPolicy.ID == 0 {
+		return fmt.Errorf("policy %d not found", id)
+	}
+
+	reset := false
+	if updatedPolicy.Trigger.Kind != originPolicy.Trigger.Kind {
+		reset = true
+	} else {
+		switch updatedPolicy.Trigger.Kind {
+		case replication.TriggerKindSchedule:
+			if !originPolicy.Trigger.ScheduleParam.Equal(updatedPolicy.Trigger.ScheduleParam) {
+				reset = true
+			}
+		case replication.TriggerKindImmediate:
+			// Always reset immediate trigger as it is relevent with namespaces
+			reset = true
+		default:
+			// manual trigger, no need to reset
+		}
+	}
+
+	if err = ctl.policyManager.UpdatePolicy(updatedPolicy); err != nil {
+		return err
+	}
+
+	if reset {
+		if err = ctl.triggerManager.UnsetTrigger(&originPolicy); err != nil {
+			return err
+		}
+
+		return ctl.triggerManager.SetupTrigger(&updatedPolicy)
+	}
+
+	return nil
+}
+
+//RemovePolicy will remove the specified policy and clean the related settings
+func (ctl *DefaultController) RemovePolicy(policyID int64) error {
+	// TODO check pre-conditions
+
+	policy, err := ctl.policyManager.GetPolicy(policyID)
+	if err != nil {
+		return err
+	}
+
+	if policy.ID == 0 {
+		return fmt.Errorf("policy %d not found", policyID)
+	}
+
+	if err = ctl.triggerManager.UnsetTrigger(&policy); err != nil {
+		return err
+	}
+
+	return ctl.policyManager.RemovePolicy(policyID)
+}
+
+//GetPolicy is delegation of GetPolicy of Policy.Manager
+func (ctl *DefaultController) GetPolicy(policyID int64) (models.ReplicationPolicy, error) {
+	return ctl.policyManager.GetPolicy(policyID)
+}
+
+//GetPolicies is delegation of GetPoliciemodels.ReplicationPolicy{}s of Policy.Manager
+func (ctl *DefaultController) GetPolicies(query models.QueryParameter) ([]models.ReplicationPolicy, error) {
+	return ctl.policyManager.GetPolicies(query)
+}
+
+//Replicate starts one replication defined in the specified policy;
+//Can be launched by the API layer and related triggers.
+func (ctl *DefaultController) Replicate(policyID int64, metadata ...map[string]interface{}) error {
+	policy, err := ctl.GetPolicy(policyID)
+	if err != nil {
+		return err
+	}
+	if policy.ID == 0 {
+		return fmt.Errorf("policy %d not found", policyID)
+	}
+
+	// prepare candidates for replication
+	candidates := getCandidates(&policy, ctl.sourcer, metadata...)
+
+	/*
+		targets := []*common_models.RepTarget{}
+		for _, targetID := range policy.TargetIDs {
+			target, err := ctl.targetManager.GetTarget(targetID)
+			if err != nil {
+				return err
+			}
+			targets = append(targets, target)
+		}
+	*/
+
+	// submit the replication
+	return replicate(ctl.replicator, policyID, candidates)
+}
+
+func getCandidates(policy *models.ReplicationPolicy, sourcer *source.Sourcer,
+	metadata ...map[string]interface{}) []models.FilterItem {
+	candidates := []models.FilterItem{}
+	if len(metadata) > 0 {
+		meta := metadata[0]["candidates"]
+		if meta != nil {
+			cands, ok := meta.([]models.FilterItem)
+			if ok {
+				candidates = append(candidates, cands...)
+			}
+		}
+	}
+
+	if len(candidates) == 0 {
+		for _, namespace := range policy.Namespaces {
+			candidates = append(candidates, models.FilterItem{
+				Kind:      replication.FilterItemKindProject,
+				Value:     namespace,
+				Operation: common_models.RepOpTransfer,
+			})
+		}
+	}
+
+	filterChain := buildFilterChain(policy, sourcer)
+
+	return filterChain.DoFilter(candidates)
+}
+
+func buildFilterChain(policy *models.ReplicationPolicy, sourcer *source.Sourcer) source.FilterChain {
+	filters := []source.Filter{}
+
+	patterns := map[string]string{}
+	for _, f := range policy.Filters {
+		patterns[f.Kind] = f.Pattern
+	}
+
+	registry := sourcer.GetAdaptor(replication.AdaptorKindHarbor)
+	// only support repository and tag filter for now
+	filters = append(filters,
+		source.NewRepositoryFilter(patterns[replication.FilterItemKindRepository], registry))
+	filters = append(filters,
+		source.NewTagFilter(patterns[replication.FilterItemKindTag], registry))
+
+	return source.NewDefaultFilterChain(filters)
+}
+
+func replicate(replicator replicator.Replicator, policyID int64, candidates []models.FilterItem) error {
+	if len(candidates) == 0 {
+		log.Debugf("replicaton candidates are null, no further action needed")
+	}
+
+	repositories := map[string][]string{}
+	// TODO the operation of all candidates are same for now. Update it after supporting
+	// replicate deletion
+	operation := ""
+	for _, candidate := range candidates {
+		strs := strings.SplitN(candidate.Value, ":", 2)
+		repositories[strs[0]] = append(repositories[strs[0]], strs[1])
+		operation = candidate.Operation
+	}
+
+	for repository, tags := range repositories {
+		replication := &client.Replication{
+			PolicyID:   policyID,
+			Repository: repository,
+			Operation:  operation,
+			Tags:       tags,
+		}
+		log.Debugf("submiting replication job to jobservice: %v", replication)
+		if err := replicator.Replicate(replication); err != nil {
+			return err
+		}
+	}
+	return nil
+}

src/replication/core/controller_test.go

@@ -0,0 +1,142 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package core
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/common/utils/test"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/source"
+)
+
+func TestMain(m *testing.M) {
+	GlobalController = NewDefaultController(ControllerConfig{})
+	// set the policy manager used by GlobalController with a fake policy manager
+	controller := GlobalController.(*DefaultController)
+	controller.policyManager = &test.FakePolicyManager{}
+	os.Exit(m.Run())
+}
+
+func TestNewDefaultController(t *testing.T) {
+	controller := NewDefaultController(ControllerConfig{})
+	assert.NotNil(t, controller)
+}
+
+func TestInit(t *testing.T) {
+	assert.Nil(t, GlobalController.Init())
+}
+
+func TestCreatePolicy(t *testing.T) {
+	_, err := GlobalController.CreatePolicy(models.ReplicationPolicy{
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindManual,
+		},
+	})
+	assert.Nil(t, err)
+}
+
+func TestUpdatePolicy(t *testing.T) {
+	assert.Nil(t, GlobalController.UpdatePolicy(models.ReplicationPolicy{
+		ID: 2,
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindManual,
+		},
+	}))
+}
+
+func TestRemovePolicy(t *testing.T) {
+	assert.Nil(t, GlobalController.RemovePolicy(1))
+}
+
+func TestGetPolicy(t *testing.T) {
+	_, err := GlobalController.GetPolicy(1)
+	assert.Nil(t, err)
+}
+
+func TestGetPolicies(t *testing.T) {
+	_, err := GlobalController.GetPolicies(models.QueryParameter{})
+	assert.Nil(t, err)
+}
+
+func TestReplicate(t *testing.T) {
+	// TODO
+}
+
+func TestGetCandidates(t *testing.T) {
+	policy := &models.ReplicationPolicy{
+		ID: 1,
+		Filters: []models.Filter{
+			models.Filter{
+				Kind:    replication.FilterItemKindTag,
+				Pattern: "*",
+			},
+		},
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindImmediate,
+		},
+	}
+
+	sourcer := source.NewSourcer()
+
+	candidates := []models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/hello-world:release-1.0",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/hello-world:latest",
+		},
+	}
+	metadata := map[string]interface{}{
+		"candidates": candidates,
+	}
+	result := getCandidates(policy, sourcer, metadata)
+	assert.Equal(t, 2, len(result))
+
+	policy.Filters = []models.Filter{
+		models.Filter{
+			Kind:    replication.FilterItemKindTag,
+			Pattern: "release-*",
+		},
+	}
+	result = getCandidates(policy, sourcer, metadata)
+	assert.Equal(t, 1, len(result))
+}
+
+func TestBuildFilterChain(t *testing.T) {
+	policy := &models.ReplicationPolicy{
+		ID: 1,
+		Filters: []models.Filter{
+			models.Filter{
+				Kind:    replication.FilterItemKindRepository,
+				Pattern: "*",
+			},
+			models.Filter{
+				Kind:    replication.FilterItemKindTag,
+				Pattern: "*",
+			},
+		},
+	}
+
+	sourcer := source.NewSourcer()
+
+	chain := buildFilterChain(policy, sourcer)
+	assert.Equal(t, 2, len(chain.Filters()))
+}

src/replication/event/init.go

@@ -0,0 +1,39 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package event
+
+import (
+	"github.com/vmware/harbor/src/common/notifier"
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/replication/event/topic"
+)
+
+//Subscribe related topics
+func init() {
+	//Listen the related event topics
+	handlers := map[string]notifier.NotificationHandler{
+		topic.StartReplicationTopic:           &StartReplicationHandler{},
+		topic.ReplicationEventTopicOnPush:     &OnPushHandler{},
+		topic.ReplicationEventTopicOnDeletion: &OnDeletionHandler{},
+	}
+
+	for topic, handler := range handlers {
+		if err := notifier.Subscribe(topic, handler); err != nil {
+			log.Errorf("failed to subscribe topic %s: %v", topic, err)
+			continue
+		}
+		log.Debugf("topic %s is subscribed", topic)
+	}
+}

src/replication/event/notification/notification.go

@@ -0,0 +1,34 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package notification
+
+//OnPushNotification contains the data required by this handler
+type OnPushNotification struct {
+	//The name of the image that is being pushed
+	Image string
+}
+
+//OnDeletionNotification contains the data required by this handler
+type OnDeletionNotification struct {
+	//The name of the image that is being deleted
+	Image string
+}
+
+//StartReplicationNotification contains data required by this handler
+type StartReplicationNotification struct {
+	//ID of the policy
+	PolicyID int64
+	Metadata map[string]interface{}
+}

src/replication/event/on_deletion_handler.go

@@ -0,0 +1,48 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package event
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+
+	"github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/replication/event/notification"
+)
+
+//OnDeletionHandler implements the notification handler interface to handle image on push event.
+type OnDeletionHandler struct{}
+
+//Handle implements the same method of notification handler interface
+func (oph *OnDeletionHandler) Handle(value interface{}) error {
+	if value == nil {
+		return errors.New("OnDeletionHandler can not handle nil value")
+	}
+
+	vType := reflect.TypeOf(value)
+	if vType.Kind() != reflect.Struct || vType.String() != "notification.OnDeletionNotification" {
+		return fmt.Errorf("Mismatch value type of OnDeletionHandler, expect %s but got %s", "notification.OnDeletionNotification", vType.String())
+	}
+
+	notification := value.(notification.OnDeletionNotification)
+	return checkAndTriggerReplication(notification.Image, models.RepOpDelete)
+}
+
+//IsStateful implements the same method of notification handler interface
+func (oph *OnDeletionHandler) IsStateful() bool {
+	//Statless
+	return false
+}

src/replication/event/on_deletion_handler_test.go

@@ -0,0 +1,43 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package event
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/utils/test"
+	"github.com/vmware/harbor/src/replication/event/notification"
+)
+
+func TestHandleOfOnDeletionHandler(t *testing.T) {
+	dao.DefaultDatabaseWatchItemDAO = &test.FakeWatchItemDAO{}
+
+	handler := &OnDeletionHandler{}
+
+	assert.NotNil(t, handler.Handle(nil))
+	assert.NotNil(t, handler.Handle(map[string]string{}))
+	assert.NotNil(t, handler.Handle(struct{}{}))
+
+	assert.Nil(t, handler.Handle(notification.OnDeletionNotification{
+		Image: "library/hello-world:latest",
+	}))
+}
+
+func TestIsStatefulOfOnDeletionHandler(t *testing.T) {
+	handler := &OnDeletionHandler{}
+	assert.False(t, handler.IsStateful())
+}

src/replication/event/on_push_handler.go

@@ -0,0 +1,91 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package event
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+
+	common_models "github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/common/notifier"
+	"github.com/vmware/harbor/src/common/utils"
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/event/notification"
+	"github.com/vmware/harbor/src/replication/event/topic"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/trigger"
+)
+
+//OnPushHandler implements the notification handler interface to handle image on push event.
+type OnPushHandler struct{}
+
+//Handle implements the same method of notification handler interface
+func (oph *OnPushHandler) Handle(value interface{}) error {
+	if value == nil {
+		return errors.New("OnPushHandler can not handle nil value")
+	}
+
+	vType := reflect.TypeOf(value)
+	if vType.Kind() != reflect.Struct || vType.String() != "notification.OnPushNotification" {
+		return fmt.Errorf("Mismatch value type of OnPushHandler, expect %s but got %s", "notification.OnPushNotification", vType.String())
+	}
+
+	notification := value.(notification.OnPushNotification)
+
+	return checkAndTriggerReplication(notification.Image, common_models.RepOpTransfer)
+}
+
+//IsStateful implements the same method of notification handler interface
+func (oph *OnPushHandler) IsStateful() bool {
+	//Statless
+	return false
+}
+
+// checks whether replication policy is set on the resource, if is, trigger the replication
+func checkAndTriggerReplication(image, operation string) error {
+	project, _ := utils.ParseRepository(image)
+	watchItems, err := trigger.DefaultWatchList.Get(project, operation)
+	if err != nil {
+		return fmt.Errorf("failed to get watch list for resource %s, operation %s: %v",
+			image, operation, err)
+	}
+	if len(watchItems) == 0 {
+		log.Debugf("no replication should be triggered for resource %s, operation %s, skip", image, operation)
+		return nil
+	}
+
+	for _, watchItem := range watchItems {
+		item := models.FilterItem{
+			Kind:      replication.FilterItemKindTag,
+			Value:     image,
+			Operation: operation,
+		}
+
+		if err := notifier.Publish(topic.StartReplicationTopic, notification.StartReplicationNotification{
+			PolicyID: watchItem.PolicyID,
+			Metadata: map[string]interface{}{
+				"candidates": []models.FilterItem{item},
+			},
+		}); err != nil {
+			return fmt.Errorf("failed to publish replication topic for resource %s, operation %s, policy %d: %v",
+				image, operation, watchItem.PolicyID, err)
+		}
+		log.Infof("replication topic for resource %s, operation %s, policy %d triggered",
+			image, operation, watchItem.PolicyID)
+	}
+	return nil
+}

src/replication/event/on_push_handler_test.go

@@ -0,0 +1,43 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package event
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/utils/test"
+	"github.com/vmware/harbor/src/replication/event/notification"
+)
+
+func TestHandleOfOnPushHandler(t *testing.T) {
+	dao.DefaultDatabaseWatchItemDAO = &test.FakeWatchItemDAO{}
+
+	handler := &OnPushHandler{}
+
+	assert.NotNil(t, handler.Handle(nil))
+	assert.NotNil(t, handler.Handle(map[string]string{}))
+	assert.NotNil(t, handler.Handle(struct{}{}))
+
+	assert.Nil(t, handler.Handle(notification.OnPushNotification{
+		Image: "library/hello-world:latest",
+	}))
+}
+
+func TestIsStatefulOfOnPushHandler(t *testing.T) {
+	handler := &OnPushHandler{}
+	assert.False(t, handler.IsStateful())
+}

src/replication/event/start_replication_handler.go

@@ -0,0 +1,53 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package event
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+
+	"github.com/vmware/harbor/src/replication/core"
+	"github.com/vmware/harbor/src/replication/event/notification"
+)
+
+//StartReplicationHandler implements the notification handler interface to handle start replication requests.
+type StartReplicationHandler struct{}
+
+//Handle implements the same method of notification handler interface
+func (srh *StartReplicationHandler) Handle(value interface{}) error {
+	if value == nil {
+		return errors.New("StartReplicationHandler can not handle nil value")
+	}
+
+	vType := reflect.TypeOf(value)
+	if vType.Kind() != reflect.Struct || vType.String() != "notification.StartReplicationNotification" {
+		return fmt.Errorf("Mismatch value type of StartReplicationHandler, expect %s but got %s", "notification.StartReplicationNotification", vType.String())
+	}
+
+	notification := value.(notification.StartReplicationNotification)
+	if notification.PolicyID <= 0 {
+		return errors.New("Invalid policy")
+	}
+
+	//Start replication
+	return core.GlobalController.Replicate(notification.PolicyID, notification.Metadata)
+}
+
+//IsStateful implements the same method of notification handler interface
+func (srh *StartReplicationHandler) IsStateful() bool {
+	//Stateless
+	return false
+}

src/replication/event/start_replication_handler_test.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package event
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/common/utils/test"
+	"github.com/vmware/harbor/src/replication/core"
+	"github.com/vmware/harbor/src/replication/event/notification"
+)
+
+func TestHandle(t *testing.T) {
+	core.GlobalController = &test.FakeReplicatoinController{}
+
+	handler := &StartReplicationHandler{}
+
+	assert.NotNil(t, handler.Handle(nil))
+	assert.NotNil(t, handler.Handle(map[string]string{}))
+	assert.NotNil(t, handler.Handle(struct{}{}))
+	assert.NotNil(t, handler.Handle(notification.StartReplicationNotification{
+		PolicyID: -1,
+	}))
+	assert.Nil(t, handler.Handle(notification.StartReplicationNotification{
+		PolicyID: 1,
+	}))
+}
+
+func TestIsStateful(t *testing.T) {
+	handler := &StartReplicationHandler{}
+	assert.False(t, handler.IsStateful())
+}

src/replication/event/topic/topics.go

@@ -0,0 +1,12 @@
+package topic
+
+const (
+	//ReplicationEventTopicOnPush : OnPush event
+	ReplicationEventTopicOnPush = "OnPush"
+
+	//ReplicationEventTopicOnDeletion : OnDeletion event
+	ReplicationEventTopicOnDeletion = "OnDeletion"
+
+	//StartReplicationTopic : Start application request
+	StartReplicationTopic = "StartReplication"
+)

src/replication/models/filter.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package models
+
+import (
+	"fmt"
+
+	"github.com/astaxie/beego/validation"
+	"github.com/vmware/harbor/src/replication"
+)
+
+// Filter is the data model represents the filter defined by user.
+type Filter struct {
+	Kind    string `json:"kind"`
+	Pattern string `json:"pattern"`
+}
+
+// Valid ...
+func (f *Filter) Valid(v *validation.Validation) {
+	if !(f.Kind == replication.FilterItemKindProject ||
+		f.Kind == replication.FilterItemKindRepository ||
+		f.Kind == replication.FilterItemKindTag) {
+		v.SetError("kind", fmt.Sprintf("invalid filter kind: %s", f.Kind))
+	}
+
+	if len(f.Pattern) == 0 {
+		v.SetError("pattern", "filter pattern can not be empty")
+	}
+}

src/replication/models/filter_config.go

@@ -0,0 +1,7 @@
+package models
+
+//FilterConfig is data model to provide configurations to the filters.
+type FilterConfig struct {
+	//The pattern for fuzzy matching
+	Pattern string
+}

src/replication/models/filter_item.go

@@ -0,0 +1,35 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package models
+
+//FilterItem is the general data model represents the filtering resources which are used as input and output for the filters.
+type FilterItem struct {
+
+	//The kind of the filtering resources. Support 'project','repository' and 'tag' etc.
+	Kind string `json:"kind"`
+
+	//The key value of resource which can be used to filter out the resource matched with specified pattern.
+	//E.g:
+	//kind == 'project', value will be project name;
+	//kind == 'repository', value will be repository name
+	//kind == 'tag', value will be tag name.
+	Value string `json:"value"`
+
+	Operation string `json:"operation"`
+
+	//Extension placeholder.
+	//To append more additional information if required by the filter.
+	Metadata map[string]interface{} `json:"metadata"`
+}

src/replication/models/filter_test.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package models
+
+import (
+	"testing"
+
+	"github.com/astaxie/beego/validation"
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/replication"
+)
+
+func TestValid(t *testing.T) {
+	cases := map[*Filter]bool{
+		&Filter{}: true,
+		&Filter{
+			Kind: "invalid_kind",
+		}: true,
+		&Filter{
+			Kind: replication.FilterItemKindRepository,
+		}: true,
+		&Filter{
+			Kind:    replication.FilterItemKindRepository,
+			Pattern: "*",
+		}: false,
+	}
+
+	for filter, hasError := range cases {
+		v := &validation.Validation{}
+		filter.Valid(v)
+		assert.Equal(t, hasError, v.HasErrors())
+	}
+}

src/replication/models/policy.go

@@ -0,0 +1,38 @@
+package models
+
+import (
+	"time"
+)
+
+//ReplicationPolicy defines the structure of a replication policy.
+type ReplicationPolicy struct {
+	ID                int64 //UUID of the policy
+	Name              string
+	Description       string
+	Filters           []Filter
+	ReplicateDeletion bool
+	Trigger           *Trigger //The trigger of the replication
+	ProjectIDs        []int64  //Projects attached to this policy
+	TargetIDs         []int64
+	Namespaces        []string // The namespaces are used to set immediate trigger
+	CreationTime      time.Time
+	UpdateTime        time.Time
+}
+
+//QueryParameter defines the parameters used to do query selection.
+type QueryParameter struct {
+	//Query by page, couple with pageSize
+	Page int64
+
+	//Size of each page, couple with page
+	PageSize int64
+
+	//Query by the type of trigger
+	TriggerType string
+
+	//Query by project ID
+	ProjectID int64
+
+	//Query by name
+	Name string
+}

src/replication/models/registry_models.go

@@ -0,0 +1,34 @@
+package models
+
+//Namespace is the resource group/scope like project in Harbor and organization in docker hub.
+type Namespace struct {
+	//Name of the namespace
+	Name string
+
+	//Extensions to provide flexibility
+	Metadata map[string]interface{}
+}
+
+//Repository is to keep the info of image repository.
+type Repository struct {
+	//Name of the repository
+	Name string
+
+	//Project reference of this repository belongs to
+	Namespace Namespace
+
+	//Extensions to provide flexibility
+	Metadata map[string]interface{}
+}
+
+//Tag keeps the info of image with specified version
+type Tag struct {
+	//Name of the tag
+	Name string
+
+	//The repository reference of this tag belongs to
+	Repository Repository
+
+	//Extensions to provide flexibility
+	Metadata map[string]interface{}
+}

src/replication/models/trigger.go

@@ -0,0 +1,79 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package models
+
+import (
+	"fmt"
+
+	"github.com/astaxie/beego/validation"
+	"github.com/vmware/harbor/src/replication"
+)
+
+//Trigger is replication launching approach definition
+type Trigger struct {
+	Kind          string         `json:"kind"`           // the type of the trigger
+	ScheduleParam *ScheduleParam `json:"schedule_param"` // optional, only used when kind is 'schedule'
+}
+
+// Valid ...
+func (t *Trigger) Valid(v *validation.Validation) {
+	if !(t.Kind == replication.TriggerKindImmediate ||
+		t.Kind == replication.TriggerKindManual ||
+		t.Kind == replication.TriggerKindSchedule) {
+		v.SetError("kind", fmt.Sprintf("invalid trigger kind: %s", t.Kind))
+	}
+
+	if t.Kind == replication.TriggerKindSchedule {
+		if t.ScheduleParam == nil {
+			v.SetError("schedule_param", "empty schedule_param")
+		} else {
+			t.ScheduleParam.Valid(v)
+		}
+	}
+}
+
+// ScheduleParam defines the parameters used by schedule trigger
+type ScheduleParam struct {
+	Type    string `json:"type"`    //daily or weekly
+	Weekday int8   `json:"weekday"` //Optional, only used when type is 'weekly'
+	Offtime int64  `json:"offtime"` //The time offset with the UTC 00:00 in seconds
+}
+
+// Valid ...
+func (s *ScheduleParam) Valid(v *validation.Validation) {
+	if !(s.Type == replication.TriggerScheduleDaily ||
+		s.Type == replication.TriggerScheduleWeekly) {
+		v.SetError("type", fmt.Sprintf("invalid schedule trigger parameter type: %s", s.Type))
+	}
+
+	if s.Type == replication.TriggerScheduleWeekly {
+		if s.Weekday < 1 || s.Weekday > 7 {
+			v.SetError("weekday", fmt.Sprintf("invalid schedule trigger parameter weekday: %d", s.Weekday))
+		}
+	}
+
+	if s.Offtime < 0 || s.Offtime > 3600*24 {
+		v.SetError("offtime", fmt.Sprintf("invalid schedule trigger parameter offtime: %d", s.Offtime))
+	}
+}
+
+// Equal ...
+func (s *ScheduleParam) Equal(param *ScheduleParam) bool {
+	if param == nil {
+		return false
+	}
+
+	return s.Type == param.Type && s.Weekday == param.Weekday && s.Offtime == param.Offtime
+}

src/replication/models/trigger_test.go

@@ -0,0 +1,77 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package models
+
+import (
+	"testing"
+
+	"github.com/astaxie/beego/validation"
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/replication"
+)
+
+func TestValidOfTrigger(t *testing.T) {
+	cases := map[*Trigger]bool{
+		&Trigger{}: true,
+		&Trigger{
+			Kind: "invalid_kind",
+		}: true,
+		&Trigger{
+			Kind: replication.TriggerKindImmediate,
+		}: false,
+		&Trigger{
+			Kind: replication.TriggerKindSchedule,
+		}: true,
+	}
+
+	for filter, hasError := range cases {
+		v := &validation.Validation{}
+		filter.Valid(v)
+		assert.Equal(t, hasError, v.HasErrors())
+	}
+}
+
+func TestValidOfScheduleParam(t *testing.T) {
+	cases := map[*ScheduleParam]bool{
+		&ScheduleParam{}: true,
+		&ScheduleParam{
+			Type: "invalid_type",
+		}: true,
+		&ScheduleParam{
+			Type:    replication.TriggerScheduleDaily,
+			Offtime: 3600*24 + 1,
+		}: true,
+		&ScheduleParam{
+			Type:    replication.TriggerScheduleDaily,
+			Offtime: 3600 * 2,
+		}: false,
+		&ScheduleParam{
+			Type:    replication.TriggerScheduleWeekly,
+			Weekday: 0,
+			Offtime: 3600 * 2,
+		}: true,
+		&ScheduleParam{
+			Type:    replication.TriggerScheduleWeekly,
+			Weekday: 7,
+			Offtime: 3600 * 2,
+		}: false,
+	}
+
+	for param, hasError := range cases {
+		v := &validation.Validation{}
+		param.Valid(v)
+		assert.Equal(t, hasError, v.HasErrors())
+	}
+}

src/replication/policy/manager.go

@@ -0,0 +1,188 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package policy
+
+import (
+	"encoding/json"
+	"time"
+
+	"github.com/vmware/harbor/src/common/dao"
+	persist_models "github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/ui/config"
+)
+
+// Manager defines the method a policy manger should implement
+type Manager interface {
+	GetPolicies(models.QueryParameter) ([]models.ReplicationPolicy, error)
+	GetPolicy(int64) (models.ReplicationPolicy, error)
+	CreatePolicy(models.ReplicationPolicy) (int64, error)
+	UpdatePolicy(models.ReplicationPolicy) error
+	RemovePolicy(int64) error
+}
+
+//DefaultManager provides replication policy CURD capabilities.
+type DefaultManager struct{}
+
+//NewDefaultManager is the constructor of DefaultManager.
+func NewDefaultManager() *DefaultManager {
+	return &DefaultManager{}
+}
+
+//GetPolicies returns all the policies
+func (m *DefaultManager) GetPolicies(query models.QueryParameter) ([]models.ReplicationPolicy, error) {
+	result := []models.ReplicationPolicy{}
+	//TODO support more query conditions other than name and project ID
+	policies, err := dao.FilterRepPolicies(query.Name, query.ProjectID)
+	if err != nil {
+		return result, err
+	}
+
+	for _, policy := range policies {
+		ply, err := convertFromPersistModel(policy)
+		if err != nil {
+			return []models.ReplicationPolicy{}, err
+		}
+
+		if len(query.TriggerType) > 0 {
+			if ply.Trigger.Kind != query.TriggerType {
+				continue
+			}
+		}
+
+		result = append(result, ply)
+	}
+
+	return result, nil
+}
+
+//GetPolicy returns the policy with the specified ID
+func (m *DefaultManager) GetPolicy(policyID int64) (models.ReplicationPolicy, error) {
+	policy, err := dao.GetRepPolicy(policyID)
+	if err != nil {
+		return models.ReplicationPolicy{}, err
+	}
+
+	return convertFromPersistModel(policy)
+}
+
+func convertFromPersistModel(policy *persist_models.RepPolicy) (models.ReplicationPolicy, error) {
+	if policy == nil {
+		return models.ReplicationPolicy{}, nil
+	}
+
+	ply := models.ReplicationPolicy{
+		ID:                policy.ID,
+		Name:              policy.Name,
+		Description:       policy.Description,
+		ReplicateDeletion: policy.ReplicateDeletion,
+		ProjectIDs:        []int64{policy.ProjectID},
+		TargetIDs:         []int64{policy.TargetID},
+		CreationTime:      policy.CreationTime,
+		UpdateTime:        policy.UpdateTime,
+	}
+
+	project, err := config.GlobalProjectMgr.Get(policy.ProjectID)
+	if err != nil {
+		return models.ReplicationPolicy{}, err
+	}
+	ply.Namespaces = []string{project.Name}
+
+	if len(policy.Filters) > 0 {
+		filters := []models.Filter{}
+		if err := json.Unmarshal([]byte(policy.Filters), &filters); err != nil {
+			return models.ReplicationPolicy{}, err
+		}
+		ply.Filters = filters
+	}
+
+	if len(policy.Trigger) > 0 {
+		trigger := &models.Trigger{}
+		if err := json.Unmarshal([]byte(policy.Trigger), trigger); err != nil {
+			return models.ReplicationPolicy{}, err
+		}
+		ply.Trigger = trigger
+	}
+
+	return ply, nil
+}
+
+func convertToPersistModel(policy models.ReplicationPolicy) (*persist_models.RepPolicy, error) {
+	ply := &persist_models.RepPolicy{
+		ID:                policy.ID,
+		Name:              policy.Name,
+		Description:       policy.Description,
+		ReplicateDeletion: policy.ReplicateDeletion,
+		CreationTime:      policy.CreationTime,
+		UpdateTime:        policy.UpdateTime,
+	}
+
+	if len(policy.ProjectIDs) > 0 {
+		ply.ProjectID = policy.ProjectIDs[0]
+	}
+
+	if len(policy.TargetIDs) > 0 {
+		ply.TargetID = policy.TargetIDs[0]
+	}
+
+	if policy.Trigger != nil {
+		trigger, err := json.Marshal(policy.Trigger)
+		if err != nil {
+			return nil, err
+		}
+		ply.Trigger = string(trigger)
+	}
+
+	if len(policy.Filters) > 0 {
+		filters, err := json.Marshal(policy.Filters)
+		if err != nil {
+			return nil, err
+		}
+		ply.Filters = string(filters)
+	}
+
+	return ply, nil
+}
+
+//CreatePolicy creates a new policy with the provided data;
+//If creating failed, error will be returned;
+//If creating succeed, ID of the new created policy will be returned.
+func (m *DefaultManager) CreatePolicy(policy models.ReplicationPolicy) (int64, error) {
+	now := time.Now()
+	policy.CreationTime = now
+	policy.UpdateTime = now
+	ply, err := convertToPersistModel(policy)
+	if err != nil {
+		return 0, err
+	}
+	return dao.AddRepPolicy(*ply)
+}
+
+//UpdatePolicy updates the policy;
+//If updating failed, error will be returned.
+func (m *DefaultManager) UpdatePolicy(policy models.ReplicationPolicy) error {
+	policy.UpdateTime = time.Now()
+	ply, err := convertToPersistModel(policy)
+	if err != nil {
+		return err
+	}
+	return dao.UpdateRepPolicy(ply)
+}
+
+//RemovePolicy removes the specified policy;
+//If removing failed, error will be returned.
+func (m *DefaultManager) RemovePolicy(policyID int64) error {
+	return dao.DeleteRepPolicy(policyID)
+}

src/replication/policy/manager_test.go

@@ -0,0 +1,60 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package policy
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+func TestConvertToPersistModel(t *testing.T) {
+	var id, projectID, targetID int64 = 1, 1, 1
+	name := "policy01"
+	replicateDeletion := true
+	trigger := &models.Trigger{
+		Kind: "trigger_kind",
+	}
+	filters := []models.Filter{
+		models.Filter{
+			Kind:    "filter_kind",
+			Pattern: "filter_pattern",
+		},
+	}
+	policy := models.ReplicationPolicy{
+		ID:                id,
+		Name:              name,
+		ReplicateDeletion: replicateDeletion,
+		ProjectIDs:        []int64{projectID},
+		TargetIDs:         []int64{targetID},
+		Trigger:           trigger,
+		Filters:           filters,
+	}
+
+	ply, err := convertToPersistModel(policy)
+	require.Nil(t, err)
+	assert.Equal(t, id, ply.ID)
+	assert.Equal(t, name, ply.Name)
+	assert.Equal(t, replicateDeletion, ply.ReplicateDeletion)
+	assert.Equal(t, projectID, ply.ProjectID)
+	assert.Equal(t, targetID, ply.TargetID)
+	tg, _ := json.Marshal(trigger)
+	assert.Equal(t, string(tg), ply.Trigger)
+	ft, _ := json.Marshal(filters)
+	assert.Equal(t, string(ft), ply.Filters)
+}

src/replication/registry/adaptor.go

@@ -0,0 +1,34 @@
+package registry
+
+import (
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+//Adaptor defines the unified operations for all the supported registries such as Harbor or DockerHub.
+//It's used to adapt the different interfaces provied by the different registry providers.
+//Use external registry with restful api providing as example, these intrefaces may depends on the
+//related restful apis like:
+//  /api/vx/repositories/{namespace}/{repositoryName}/tags/{name}
+//  /api/v0/accounts/{namespace}
+type Adaptor interface {
+	//Return the unique kind identifier of the adaptor
+	Kind() string
+
+	//Get all the namespaces
+	GetNamespaces() []models.Namespace
+
+	//Get the namespace with the specified name
+	GetNamespace(name string) models.Namespace
+
+	//Get all the repositories under the specified namespace
+	GetRepositories(namespace string) []models.Repository
+
+	//Get the repository with the specified name under the specified namespace
+	GetRepository(name string, namespace string) models.Repository
+
+	//Get all the tags of the specified repository under the namespace
+	GetTags(repositoryName string, namespace string) []models.Tag
+
+	//Get the tag with the specified name of the repository under the namespace
+	GetTag(name string, repositoryName string, namespace string) models.Tag
+}

src/replication/registry/harbor_adaptor.go

@@ -0,0 +1,80 @@
+package registry
+
+import (
+	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/ui/utils"
+)
+
+// TODO refacotor the methods of HarborAdaptor by caling Harbor's API
+
+//HarborAdaptor is defined to adapt the Harbor registry
+type HarborAdaptor struct{}
+
+//Kind returns the unique kind identifier of the adaptor
+func (ha *HarborAdaptor) Kind() string {
+	return replication.AdaptorKindHarbor
+}
+
+//GetNamespaces is ued to get all the namespaces
+func (ha *HarborAdaptor) GetNamespaces() []models.Namespace {
+	return nil
+}
+
+//GetNamespace is used to get the namespace with the specified name
+func (ha *HarborAdaptor) GetNamespace(name string) models.Namespace {
+	return models.Namespace{}
+}
+
+//GetRepositories is used to get all the repositories under the specified namespace
+func (ha *HarborAdaptor) GetRepositories(namespace string) []models.Repository {
+	repos, err := dao.GetRepositoryByProjectName(namespace)
+	if err != nil {
+		log.Errorf("failed to get repositories under namespace %s: %v", namespace, err)
+		return nil
+	}
+
+	repositories := []models.Repository{}
+	for _, repo := range repos {
+		repositories = append(repositories, models.Repository{
+			Name: repo.Name,
+		})
+	}
+	return repositories
+}
+
+//GetRepository is used to get the repository with the specified name under the specified namespace
+func (ha *HarborAdaptor) GetRepository(name string, namespace string) models.Repository {
+	return models.Repository{}
+}
+
+//GetTags is used to get all the tags of the specified repository under the namespace
+func (ha *HarborAdaptor) GetTags(repositoryName string, namespace string) []models.Tag {
+	client, err := utils.NewRepositoryClientForUI("harbor-ui", repositoryName)
+	if err != nil {
+		log.Errorf("failed to create registry client: %v", err)
+		return nil
+	}
+
+	ts, err := client.ListTag()
+	if err != nil {
+		log.Errorf("failed to get tags of repository %s: %v", repositoryName, err)
+		return nil
+	}
+
+	tags := []models.Tag{}
+	for _, t := range ts {
+		tags = append(tags, models.Tag{
+			Name: t,
+		})
+	}
+
+	return tags
+}
+
+//GetTag is used to get the tag with the specified name of the repository under the namespace
+func (ha *HarborAdaptor) GetTag(name string, repositoryName string, namespace string) models.Tag {
+	return models.Tag{}
+}

src/replication/replicator/replicator.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package replicator
+
+import (
+	"github.com/vmware/harbor/src/jobservice/client"
+)
+
+// Replicator submits the replication work to the jobservice
+type Replicator interface {
+	Replicate(*client.Replication) error
+}
+
+// DefaultReplicator provides a default implement for Replicator
+type DefaultReplicator struct {
+	client client.Client
+}
+
+// NewDefaultReplicator returns an instance of DefaultReplicator
+func NewDefaultReplicator(client client.Client) *DefaultReplicator {
+	return &DefaultReplicator{
+		client: client,
+	}
+}
+
+// Replicate ...
+func (d *DefaultReplicator) Replicate(replication *client.Replication) error {
+	return d.client.SubmitReplicationJob(replication)
+}

src/replication/replicator/replicator_test.go

@@ -12,39 +12,26 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package auth
+package replicator
 
 import (
-	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/jobservice/client"
 )
 
-// Authorizer authorizes request
-type Authorizer interface {
-	Authorize(*http.Request) error
-}
-
-// NewSecretAuthorizer returns an instance of secretAuthorizer
-func NewSecretAuthorizer(cookieName, secret string) Authorizer {
-	return &secretAuthorizer{
-		cookieName: cookieName,
-		secret:     secret,
-	}
-}
-
-type secretAuthorizer struct {
-	cookieName string
-	secret     string
-}
-
-func (s *secretAuthorizer) Authorize(req *http.Request) error {
-	if req == nil {
-		return nil
-	}
-
-	req.AddCookie(&http.Cookie{
-		Name:  s.cookieName,
-		Value: s.secret,
-	})
+type fakeJobserviceClient struct{}
 
+func (f *fakeJobserviceClient) SubmitReplicationJob(replication *client.Replication) error {
 	return nil
 }
+
+func (f *fakeJobserviceClient) StopReplicationJobs(policyID int64) error {
+	return nil
+}
+
+func TestReplicate(t *testing.T) {
+	replicator := NewDefaultReplicator(&fakeJobserviceClient{})
+	assert.Nil(t, replicator.Replicate(&client.Replication{}))
+}

src/replication/source/convertor.go

@@ -0,0 +1,16 @@
+package source
+
+import (
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+//Convertor is designed to covert the format of output from upstream filter to the input format
+//required by the downstream filter if needed.
+//Each convertor covers only one specified conversion process between the two filters.
+//E.g:
+//If project filter connects to repository filter, then one convertor should be defined for this connection;
+//If project filter connects to tag filter, then another one should be defined. The above one can not be reused.
+type Convertor interface {
+	//Accept the items from upstream filter as input and then covert them to the required format and returned.
+	Convert(itemsOfUpstream []models.FilterItem) (itemsOfDownstream []models.FilterItem)
+}

src/replication/source/default_filter_chain.go

@@ -0,0 +1,57 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+// DefaultFilterChain provides a default implement for interface FilterChain
+type DefaultFilterChain struct {
+	filters []Filter
+}
+
+// NewDefaultFilterChain returns an instance of DefaultFilterChain
+func NewDefaultFilterChain(filters []Filter) *DefaultFilterChain {
+	return &DefaultFilterChain{
+		filters: filters,
+	}
+}
+
+// Build nil implement now
+func (d *DefaultFilterChain) Build(filters []Filter) error {
+	return nil
+}
+
+// Filters returns the filter list
+func (d *DefaultFilterChain) Filters() []Filter {
+	return d.filters
+}
+
+// DoFilter does the filter works for filterItems
+func (d *DefaultFilterChain) DoFilter(filterItems []models.FilterItem) []models.FilterItem {
+	if len(filterItems) == 0 {
+		return []models.FilterItem{}
+	}
+
+	for _, filter := range d.filters {
+		convertor := filter.GetConvertor()
+		if convertor != nil {
+			filterItems = convertor.Convert(filterItems)
+		}
+		filterItems = filter.DoFilter(filterItems)
+	}
+	return filterItems
+}

src/replication/source/default_filter_chain_test.go

@@ -0,0 +1,75 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+func TestBuild(t *testing.T) {
+	chain := NewDefaultFilterChain(nil)
+	require.Nil(t, chain.Build(nil))
+}
+
+func TestFilters(t *testing.T) {
+	filters := []Filter{NewPatternFilter("project", "*")}
+	chain := NewDefaultFilterChain(filters)
+	assert.EqualValues(t, filters, chain.Filters())
+}
+
+func TestDoFilter(t *testing.T) {
+	projectFilter := NewPatternFilter(replication.FilterItemKindProject, "library*")
+	repositoryFilter := NewPatternFilter(replication.FilterItemKindRepository,
+		"library/ubuntu*", &fakeRepositoryConvertor{})
+	filters := []Filter{projectFilter, repositoryFilter}
+
+	items := []models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindProject,
+			Value: "library",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindProject,
+			Value: "test",
+		},
+	}
+	chain := NewDefaultFilterChain(filters)
+	items = chain.DoFilter(items)
+	assert.EqualValues(t, []models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindRepository,
+			Value: "library/ubuntu",
+		},
+	}, items)
+
+}
+
+type fakeRepositoryConvertor struct{}
+
+func (f *fakeRepositoryConvertor) Convert(items []models.FilterItem) []models.FilterItem {
+	result := []models.FilterItem{}
+	for _, item := range items {
+		result = append(result, models.FilterItem{
+			Kind:  replication.FilterItemKindRepository,
+			Value: item.Value + "/ubuntu",
+		})
+	}
+	return result
+}

src/replication/source/filter.go

@@ -0,0 +1,18 @@
+package source
+
+import (
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+//Filter define the operations of selecting the matched resources from the candidates
+//according to the specified pattern.
+type Filter interface {
+	//Initialize the filter
+	Init() error
+
+	//Return the convertor if existing or nil if never set
+	GetConvertor() Convertor
+
+	//Filter the items
+	DoFilter(filterItems []models.FilterItem) []models.FilterItem
+}

src/replication/source/filter_chain.go

@@ -0,0 +1,21 @@
+package source
+
+import (
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+//FilterChain is the interface to define the operations of coordinating multiple filters
+//to work together as a whole pipeline.
+//E.g:
+//(original resources)---->[project filter]---->[repository filter]---->[tag filter]---->[......]---->(filter resources)
+type FilterChain interface {
+	//Build the filter chain with the filters provided;
+	//if failed, an error will be returned.
+	Build(filter []Filter) error
+
+	//Return all the filters in the chain.
+	Filters() []Filter
+
+	//Filter the items and returned the filtered items via the appended filters in the chain.
+	DoFilter(filterItems []models.FilterItem) []models.FilterItem
+}

src/replication/source/match.go

@@ -0,0 +1,23 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"path/filepath"
+)
+
+func match(pattern, str string) (bool, error) {
+	return filepath.Match(pattern, str)
+}

src/replication/source/match_test.go

@@ -0,0 +1,43 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMatch(t *testing.T) {
+	cases := []struct {
+		pattern string
+		str     string
+		matched bool
+	}{
+		{"", "", true},
+		{"*", "library", true},
+		{"library/*", "library/mysql", true},
+		{"library/*", "library/mysql/5.6", false},
+		{"library/mysq?", "library/mysql", true},
+		{"library/mysq?", "library/mysqld", false},
+	}
+
+	for _, c := range cases {
+		matched, err := match(c.pattern, c.str)
+		require.Nil(t, err)
+		assert.Equal(t, c.matched, matched)
+	}
+}

src/replication/source/pattern_filter.go

@@ -0,0 +1,84 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"regexp"
+
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+// PatternFilter implements Filter interface for pattern filter
+type PatternFilter struct {
+	kind      string
+	pattern   string
+	convertor Convertor
+}
+
+// NewPatternFilter returns an instance of PatternFilter
+func NewPatternFilter(kind, pattern string, convertor ...Convertor) *PatternFilter {
+	filer := &PatternFilter{
+		kind:    kind,
+		pattern: pattern,
+	}
+
+	if len(convertor) > 0 {
+		filer.convertor = convertor[0]
+	}
+
+	return filer
+}
+
+// Init the filter. nil implement for now
+func (p *PatternFilter) Init() error {
+	return nil
+}
+
+// GetConvertor returns the convertor
+func (p *PatternFilter) GetConvertor() Convertor {
+	return p.convertor
+}
+
+// DoFilter filters resources
+func (p *PatternFilter) DoFilter(filterItems []models.FilterItem) []models.FilterItem {
+	items := []models.FilterItem{}
+	for _, item := range filterItems {
+		if item.Kind != p.kind {
+			log.Warningf("unexpected filter item kind, expected: %s, got: %s, skip",
+				p.kind, item.Kind)
+			continue
+		}
+
+		matched, err := regexp.MatchString(p.pattern, item.Value)
+		if err != nil {
+			log.Errorf("failed to match pattern %s, value %s: %v, skip",
+				p.pattern, item.Value, err)
+			continue
+		}
+
+		if !matched {
+			log.Debugf("%s does not match to the %s filter %s, skip",
+				item.Value, p.kind, p.pattern)
+			continue
+		}
+
+		log.Debugf("add %s to the result of %s filter %s",
+			item.Value, p.kind, p.pattern)
+		items = append(items, item)
+	}
+
+	return items
+}

src/replication/source/pattern_filter_test.go

@@ -0,0 +1,63 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+
+	"testing"
+)
+
+var pfilter = NewPatternFilter(replication.FilterItemKindTag, "library/ubuntu:release-*", nil)
+
+func TestPatternFilterInit(t *testing.T) {
+	assert.Nil(t, pfilter.Init())
+}
+
+func TestPatternFilterGetConvertor(t *testing.T) {
+	assert.Nil(t, pfilter.GetConvertor())
+}
+
+func TestPatternFilterDoFilter(t *testing.T) {
+	items := []models.FilterItem{
+		models.FilterItem{
+			Kind: replication.FilterItemKindProject,
+		},
+		models.FilterItem{
+			Kind: replication.FilterItemKindRepository,
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/ubuntu:release-14.04",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/ubuntu:release-16.04",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/ubuntu:test",
+		},
+	}
+	result := pfilter.DoFilter(items)
+	assert.Equal(t, 2, len(result))
+	assert.Equal(t, replication.FilterItemKindTag, result[0].Kind)
+	assert.Equal(t, "library/ubuntu:release-14.04", result[0].Value)
+	assert.Equal(t, replication.FilterItemKindTag, result[1].Kind)
+	assert.Equal(t, "library/ubuntu:release-16.04", result[1].Value)
+
+}

src/replication/source/repository_convertor.go

@@ -0,0 +1,55 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/registry"
+)
+
+// RepositoryConvertor implement Convertor interface, convert projects to repositories
+type RepositoryConvertor struct {
+	registry registry.Adaptor
+}
+
+// NewRepositoryConvertor returns an instance of RepositoryConvertor
+func NewRepositoryConvertor(registry registry.Adaptor) *RepositoryConvertor {
+	return &RepositoryConvertor{
+		registry: registry,
+	}
+}
+
+// Convert projects to repositories
+func (r *RepositoryConvertor) Convert(items []models.FilterItem) []models.FilterItem {
+	result := []models.FilterItem{}
+	for _, item := range items {
+		// just put it to the result list if the item is not a project
+		if item.Kind != replication.FilterItemKindProject {
+			result = append(result, item)
+			continue
+		}
+
+		repositories := r.registry.GetRepositories(item.Value)
+		for _, repository := range repositories {
+			result = append(result, models.FilterItem{
+				Kind:      replication.FilterItemKindRepository,
+				Value:     repository.Name,
+				Operation: item.Operation,
+			})
+		}
+	}
+	return result
+}

src/replication/source/repository_convertor_test.go

@@ -0,0 +1,95 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+func TestRepositoryConvert(t *testing.T) {
+	items := []models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindProject,
+			Value: "library",
+		},
+		models.FilterItem{
+			Kind: replication.FilterItemKindRepository,
+		},
+	}
+	expected := []models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindRepository,
+			Value: "library/ubuntu",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindRepository,
+			Value: "library/centos",
+		},
+		models.FilterItem{
+			Kind: replication.FilterItemKindRepository,
+		},
+	}
+
+	convertor := NewRepositoryConvertor(&fakeRegistryAdaptor{})
+	assert.EqualValues(t, expected, convertor.Convert(items))
+}
+
+type fakeRegistryAdaptor struct{}
+
+func (f *fakeRegistryAdaptor) Kind() string {
+	return "fake"
+}
+
+func (f *fakeRegistryAdaptor) GetNamespaces() []models.Namespace {
+	return nil
+}
+
+func (f *fakeRegistryAdaptor) GetNamespace(name string) models.Namespace {
+	return models.Namespace{}
+}
+
+func (f *fakeRegistryAdaptor) GetRepositories(namespace string) []models.Repository {
+	return []models.Repository{
+		models.Repository{
+			Name: "library/ubuntu",
+		},
+		models.Repository{
+			Name: "library/centos",
+		},
+	}
+}
+
+func (f *fakeRegistryAdaptor) GetRepository(name string, namespace string) models.Repository {
+	return models.Repository{}
+}
+
+func (f *fakeRegistryAdaptor) GetTags(repositoryName string, namespace string) []models.Tag {
+	return []models.Tag{
+		models.Tag{
+			Name: "14.04",
+		},
+		models.Tag{
+			Name: "16.04",
+		},
+	}
+}
+
+func (f *fakeRegistryAdaptor) GetTag(name string, repositoryName string, namespace string) models.Tag {
+	return models.Tag{}
+}

src/replication/source/repository_filter.go

@@ -0,0 +1,89 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"strings"
+
+	"github.com/vmware/harbor/src/common/utils"
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/registry"
+)
+
+// RepositoryFilter implement Filter interface to filter repository
+type RepositoryFilter struct {
+	pattern   string
+	convertor Convertor
+}
+
+// NewRepositoryFilter returns an instance of RepositoryFilter
+func NewRepositoryFilter(pattern string, registry registry.Adaptor) *RepositoryFilter {
+	return &RepositoryFilter{
+		pattern:   pattern,
+		convertor: NewRepositoryConvertor(registry),
+	}
+}
+
+// Init ...
+func (r *RepositoryFilter) Init() error {
+	return nil
+}
+
+// GetConvertor ...
+func (r *RepositoryFilter) GetConvertor() Convertor {
+	return r.convertor
+}
+
+// DoFilter filters repository and image(according to the repository part) and drops any other resource types
+func (r *RepositoryFilter) DoFilter(items []models.FilterItem) []models.FilterItem {
+	candidates := []string{}
+	for _, item := range items {
+		candidates = append(candidates, item.Value)
+	}
+	log.Debugf("repository filter candidates: %v", candidates)
+
+	result := []models.FilterItem{}
+	for _, item := range items {
+		if item.Kind != replication.FilterItemKindRepository && item.Kind != replication.FilterItemKindTag {
+			log.Warningf("unsupported type %s for repository filter, drop", item.Kind)
+			continue
+		}
+
+		repository := item.Value
+		if item.Kind == replication.FilterItemKindTag {
+			repository = strings.SplitN(repository, ":", 2)[0]
+		}
+
+		if len(r.pattern) == 0 {
+			log.Debugf("pattern is null, add %s to the repository filter result list", item.Value)
+			result = append(result, item)
+		} else {
+			// trim the project
+			_, repository = utils.ParseRepository(repository)
+			matched, err := match(r.pattern, repository)
+			if err != nil {
+				log.Errorf("failed to match pattern %s to value %s: %v", r.pattern, repository, err)
+				break
+			}
+			if matched {
+				log.Debugf("pattern %s matched, add %s to the repository filter result list", r.pattern, item.Value)
+				result = append(result, item)
+			}
+		}
+	}
+	return result
+}

src/replication/source/repository_filter_test.go

@@ -0,0 +1,75 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/registry"
+)
+
+func TestInitOfRepositoryFilter(t *testing.T) {
+	filter := NewRepositoryFilter("", &registry.HarborAdaptor{})
+	assert.Nil(t, filter.Init())
+}
+
+func TestGetConvertorOfRepositoryFilter(t *testing.T) {
+	filter := NewRepositoryFilter("", &registry.HarborAdaptor{})
+	assert.NotNil(t, filter.GetConvertor())
+}
+
+func TestDoFilterOfRepositoryFilter(t *testing.T) {
+	// invalid filter item type
+	filter := NewRepositoryFilter("", &registry.HarborAdaptor{})
+	items := filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind: "invalid_type",
+		},
+	})
+	assert.Equal(t, 0, len(items))
+
+	// empty pattern
+	filter = NewRepositoryFilter("", &registry.HarborAdaptor{})
+	items = filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindRepository,
+			Value: "library/hello-world",
+		},
+	})
+	assert.Equal(t, 1, len(items))
+
+	// non-empty pattern
+	filter = NewRepositoryFilter("*", &registry.HarborAdaptor{})
+	items = filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/hello-world",
+		},
+	})
+	assert.Equal(t, 1, len(items))
+
+	// non-empty pattern
+	filter = NewRepositoryFilter("*", &registry.HarborAdaptor{})
+	items = filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/hello-world:latest",
+		},
+	})
+	assert.Equal(t, 1, len(items))
+}

src/replication/source/sourcer.go

@@ -0,0 +1,36 @@
+package source
+
+import (
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/registry"
+)
+
+//Sourcer is used to manage and/or handle all the artifacts and information related with source registry.
+//All the things with replication source should be covered in this object.
+type Sourcer struct {
+	//Keep the adaptors we support now
+	adaptors map[string]registry.Adaptor
+}
+
+//NewSourcer is the constructor of Sourcer
+func NewSourcer() *Sourcer {
+	return &Sourcer{
+		adaptors: make(map[string]registry.Adaptor),
+	}
+}
+
+//Init will do some initialization work like registrying all the adaptors we support
+func (sc *Sourcer) Init() {
+	//Register Harbor adaptor
+	sc.adaptors[replication.AdaptorKindHarbor] = &registry.HarborAdaptor{}
+}
+
+//GetAdaptor returns the required adaptor with the specified kind.
+//If no adaptor with the specified kind existing, nil will be returned.
+func (sc *Sourcer) GetAdaptor(kind string) registry.Adaptor {
+	if len(kind) == 0 {
+		return nil
+	}
+
+	return sc.adaptors[kind]
+}

src/replication/source/sourcer_test.go

@@ -0,0 +1,24 @@
+package source
+
+import (
+	"testing"
+
+	"github.com/vmware/harbor/src/replication"
+)
+
+func TestReplicationSourcer(t *testing.T) {
+	testingSourcer := NewSourcer()
+	if testingSourcer == nil {
+		t.Fatal("Failed to create sourcer")
+	}
+
+	testingSourcer.Init()
+
+	if testingSourcer.GetAdaptor("") != nil {
+		t.Fatal("Empty kind should not be supported")
+	}
+
+	if testingSourcer.GetAdaptor(replication.AdaptorKindHarbor) == nil {
+		t.Fatalf("%s adaptor should be existing", replication.AdaptorKindHarbor)
+	}
+}

src/replication/source/tag_combination_filter.go

@@ -0,0 +1,76 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"strings"
+
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+// TagCombinationFilter implements Filter interface for merging tag filter items
+// whose repository are same into one repository filter item
+type TagCombinationFilter struct{}
+
+// NewTagCombinationFilter returns an instance of TagCombinationFilter
+func NewTagCombinationFilter() *TagCombinationFilter {
+	return &TagCombinationFilter{}
+}
+
+// Init the filter. nil implement for now
+func (t *TagCombinationFilter) Init() error {
+	return nil
+}
+
+// GetConvertor returns the convertor
+func (t *TagCombinationFilter) GetConvertor() Convertor {
+	return nil
+}
+
+// DoFilter filters resources
+func (t *TagCombinationFilter) DoFilter(filterItems []models.FilterItem) []models.FilterItem {
+	repos := map[string][]string{}
+	for _, item := range filterItems {
+		if item.Kind != replication.FilterItemKindTag {
+			log.Warningf("unexpected filter item kind, expected: %s, got: %s, skip",
+				replication.FilterItemKindTag, item.Kind)
+			continue
+		}
+
+		strs := strings.Split(item.Value, ":")
+		if len(strs) != 2 {
+			log.Warningf("unexpected image format: %s, skip", item.Value)
+			continue
+		}
+
+		repos[strs[0]] = append(repos[strs[0]], strs[1])
+	}
+
+	// TODO append operation
+	items := []models.FilterItem{}
+	for repo, tags := range repos {
+		items = append(items, models.FilterItem{
+			Kind:  replication.FilterItemKindRepository,
+			Value: repo,
+			Metadata: map[string]interface{}{
+				"tags": tags,
+			},
+		})
+	}
+
+	return items
+}

src/replication/source/tag_combination_filter_test.go

@@ -0,0 +1,83 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+
+	"testing"
+)
+
+var tcfilter = NewTagCombinationFilter()
+
+func TestTagCombinationFilterInit(t *testing.T) {
+	assert.Nil(t, tcfilter.Init())
+}
+
+func TestTagCombinationFilterGetConvertor(t *testing.T) {
+	assert.Nil(t, tcfilter.GetConvertor())
+}
+
+func TestTagCombinationFilterDoFilter(t *testing.T) {
+	items := []models.FilterItem{
+		models.FilterItem{
+			Kind: replication.FilterItemKindProject,
+		},
+		models.FilterItem{
+			Kind: replication.FilterItemKindRepository,
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/ubuntu:invalid_tag:latest",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/ubuntu:14.04",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/ubuntu:16.04",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/centos:7",
+		},
+	}
+	result := tcfilter.DoFilter(items)
+	assert.Equal(t, 2, len(result))
+
+	var ubuntu, centos models.FilterItem
+	if result[0].Value == "library/ubuntu" {
+		ubuntu = result[0]
+		centos = result[1]
+	} else {
+		centos = result[0]
+		ubuntu = result[1]
+	}
+
+	assert.Equal(t, replication.FilterItemKindRepository, ubuntu.Kind)
+	assert.Equal(t, "library/ubuntu", ubuntu.Value)
+	metadata, ok := ubuntu.Metadata["tags"].([]string)
+	assert.True(t, ok)
+	assert.EqualValues(t, []string{"14.04", "16.04"}, metadata)
+
+	assert.Equal(t, replication.FilterItemKindRepository, centos.Kind)
+	assert.Equal(t, "library/centos", centos.Value)
+	metadata, ok = centos.Metadata["tags"].([]string)
+	assert.True(t, ok)
+	assert.EqualValues(t, []string{"7"}, metadata)
+}

src/replication/source/tag_convertor.go

@@ -0,0 +1,55 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/registry"
+)
+
+// TagConvertor implement Convertor interface, convert repositories to tags
+type TagConvertor struct {
+	registry registry.Adaptor
+}
+
+// NewTagConvertor returns an instance of TagConvertor
+func NewTagConvertor(registry registry.Adaptor) *TagConvertor {
+	return &TagConvertor{
+		registry: registry,
+	}
+}
+
+//Convert repositories to tags
+func (t *TagConvertor) Convert(items []models.FilterItem) []models.FilterItem {
+	result := []models.FilterItem{}
+	for _, item := range items {
+		if item.Kind != replication.FilterItemKindRepository {
+			// just put it to the result list if the item is not a repository
+			result = append(result, item)
+			continue
+		}
+
+		tags := t.registry.GetTags(item.Value, "")
+		for _, tag := range tags {
+			result = append(result, models.FilterItem{
+				Kind:      replication.FilterItemKindTag,
+				Value:     item.Value + ":" + tag.Name,
+				Operation: item.Operation,
+			})
+		}
+	}
+	return result
+}

src/replication/source/tag_convertor_test.go

@@ -0,0 +1,51 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+func TestTagConvert(t *testing.T) {
+	items := []models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindRepository,
+			Value: "library/ubuntu",
+		},
+		models.FilterItem{
+			Kind: replication.FilterItemKindProject,
+		},
+	}
+	expected := []models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/ubuntu:14.04",
+		},
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/ubuntu:16.04",
+		},
+		models.FilterItem{
+			Kind: replication.FilterItemKindProject,
+		},
+	}
+
+	convertor := NewTagConvertor(&fakeRegistryAdaptor{})
+	assert.EqualValues(t, expected, convertor.Convert(items))
+}

src/replication/source/tag_filter.go

@@ -0,0 +1,84 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"strings"
+
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/registry"
+)
+
+// TagFilter implements Filter interface to filter tag
+type TagFilter struct {
+	pattern   string
+	convertor Convertor
+}
+
+// NewTagFilter returns an instance of TagFilter
+func NewTagFilter(pattern string, registry registry.Adaptor) *TagFilter {
+	return &TagFilter{
+		pattern:   pattern,
+		convertor: NewTagConvertor(registry),
+	}
+}
+
+// Init ...
+func (t *TagFilter) Init() error {
+	return nil
+}
+
+// GetConvertor ...
+func (t *TagFilter) GetConvertor() Convertor {
+	return t.convertor
+}
+
+// DoFilter filters tag of the image
+func (t *TagFilter) DoFilter(items []models.FilterItem) []models.FilterItem {
+	candidates := []string{}
+	for _, item := range items {
+		candidates = append(candidates, item.Value)
+	}
+	log.Debugf("tag filter candidates: %v", candidates)
+
+	result := []models.FilterItem{}
+	for _, item := range items {
+		if item.Kind != replication.FilterItemKindTag {
+			log.Warningf("unsupported type %s for tag filter, dropped", item.Kind)
+			continue
+		}
+
+		if len(t.pattern) == 0 {
+			log.Debugf("pattern is null, add %s to the tag filter result list", item.Value)
+			result = append(result, item)
+			continue
+		}
+
+		tag := strings.SplitN(item.Value, ":", 2)[1]
+		matched, err := match(t.pattern, tag)
+		if err != nil {
+			log.Errorf("failed to match pattern %s to value %s: %v", t.pattern, tag, err)
+			continue
+		}
+
+		if matched {
+			log.Debugf("pattern %s matched, add %s to the tag filter result list", t.pattern, item.Value)
+			result = append(result, item)
+		}
+	}
+	return result
+}

src/replication/source/tag_filter_test.go

@@ -0,0 +1,85 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package source
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+	"github.com/vmware/harbor/src/replication/registry"
+)
+
+func TestInitOfTagFilter(t *testing.T) {
+	filter := NewTagFilter("", &registry.HarborAdaptor{})
+	assert.Nil(t, filter.Init())
+}
+
+func TestGetConvertorOfTagFilter(t *testing.T) {
+	filter := NewTagFilter("", &registry.HarborAdaptor{})
+	assert.NotNil(t, filter.GetConvertor())
+}
+
+func TestDoFilterOfTagFilter(t *testing.T) {
+	// invalid filter item type
+	filter := NewTagFilter("", &registry.HarborAdaptor{})
+	items := filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind: "invalid_type",
+		},
+	})
+	assert.Equal(t, 0, len(items))
+
+	// empty pattern
+	filter = NewTagFilter("", &registry.HarborAdaptor{})
+	items = filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/hello-world:latest",
+		},
+	})
+	assert.Equal(t, 1, len(items))
+
+	// non-empty pattern
+	filter = NewTagFilter("l*t", &registry.HarborAdaptor{})
+	items = filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/hello-world:latest",
+		},
+	})
+	assert.Equal(t, 1, len(items))
+
+	// non-empty pattern
+	filter = NewTagFilter("lates?", &registry.HarborAdaptor{})
+	items = filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/hello-world:latest",
+		},
+	})
+	assert.Equal(t, 1, len(items))
+
+	// non-empty pattern
+	filter = NewTagFilter("latest?", &registry.HarborAdaptor{})
+	items = filter.DoFilter([]models.FilterItem{
+		models.FilterItem{
+			Kind:  replication.FilterItemKindTag,
+			Value: "library/hello-world:latest",
+		},
+	})
+	assert.Equal(t, 0, len(items))
+}

src/replication/target/target.go

@@ -0,0 +1,38 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package target
+
+import (
+	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/models"
+)
+
+// Manager defines the methods that a target manager should implement
+type Manager interface {
+	GetTarget(int64) (*models.RepTarget, error)
+}
+
+// DefaultManager implement the Manager interface
+type DefaultManager struct{}
+
+// NewDefaultManager returns an instance of DefaultManger
+func NewDefaultManager() *DefaultManager {
+	return &DefaultManager{}
+}
+
+// GetTarget ...
+func (d *DefaultManager) GetTarget(id int64) (*models.RepTarget, error) {
+	return dao.GetRepTarget(id)
+}

src/replication/target/target_test.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package target
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewDefaultManager(t *testing.T) {
+	mgr := NewDefaultManager()
+	assert.NotNil(t, mgr)
+}

src/replication/trigger/cache.go

@@ -0,0 +1,212 @@
+package trigger
+
+import (
+	"container/heap"
+	"fmt"
+	"sync"
+	"time"
+)
+
+const (
+	//The max count of items the cache can keep
+	defaultCapacity = 1000
+)
+
+//Item keeps more metadata of the triggers which are stored in the heap.
+type Item struct {
+	//Which policy the trigger belong to
+	policyID int64
+
+	//Frequency of cache querying
+	//First compration factor
+	frequency int
+
+	//The timestamp of being put into heap
+	//Second compration factor
+	timestamp int64
+
+	//The index in the heap
+	index int
+}
+
+//MetaQueue implements heap.Interface and holds items which are metadata of trigger
+type MetaQueue []*Item
+
+//Len return the size of the queue
+func (mq MetaQueue) Len() int {
+	return len(mq)
+}
+
+//Less is a comparator of heap
+func (mq MetaQueue) Less(i, j int) bool {
+	return mq[i].frequency < mq[j].frequency ||
+		(mq[i].frequency == mq[j].frequency &&
+			mq[i].timestamp < mq[j].timestamp)
+}
+
+//Swap the items to rebuild heap
+func (mq MetaQueue) Swap(i, j int) {
+	mq[i], mq[j] = mq[j], mq[i]
+	mq[i].index = i
+	mq[j].index = j
+}
+
+//Push item into heap
+func (mq *MetaQueue) Push(x interface{}) {
+	item := x.(*Item)
+	n := len(*mq)
+	item.index = n
+	item.timestamp = time.Now().UTC().UnixNano()
+	*mq = append(*mq, item)
+}
+
+//Pop smallest item from heap
+func (mq *MetaQueue) Pop() interface{} {
+	old := *mq
+	n := len(old)
+	item := old[n-1] //Smallest item
+	item.index = -1  //For safety
+	*mq = old[:n-1]
+	return item
+}
+
+//Update the frequency of item
+func (mq *MetaQueue) Update(item *Item) {
+	item.frequency++
+	heap.Fix(mq, item.index)
+}
+
+//CacheItem is the data stored in the cache.
+//It contains trigger and heap item references.
+type CacheItem struct {
+	//The trigger reference
+	trigger Interface
+
+	//The heap item reference
+	item *Item
+}
+
+//Cache is used to cache the enabled triggers with specified capacity.
+//If exceed the capacity, cached items will be adjusted with the following rules:
+// The item with least usage frequency will be replaced;
+// If multiple items with same usage frequency, the oldest one will be replaced.
+type Cache struct {
+	//The max count of items this cache can keep
+	capacity int
+
+	//Lock to handle concurrent case
+	lock *sync.RWMutex
+
+	//Hash map for quick locating cached item
+	hash map[string]CacheItem
+
+	//Heap for quick locating the trigger with least usage
+	queue *MetaQueue
+}
+
+//NewCache is constructor of cache
+func NewCache(capacity int) *Cache {
+	cap := capacity
+	if cap <= 0 {
+		cap = defaultCapacity
+	}
+
+	//Initialize heap
+	mq := make(MetaQueue, 0)
+	heap.Init(&mq)
+
+	return &Cache{
+		capacity: cap,
+		lock:     new(sync.RWMutex),
+		hash:     make(map[string]CacheItem),
+		queue:    &mq,
+	}
+}
+
+//Get the trigger interface with the specified policy ID
+func (c *Cache) Get(policyID int64) Interface {
+	if policyID <= 0 {
+		return nil
+	}
+
+	c.lock.RLock()
+	defer c.lock.RUnlock()
+
+	k := c.key(policyID)
+
+	if cacheItem, ok := c.hash[k]; ok {
+		//Update frequency
+		c.queue.Update(cacheItem.item)
+		return cacheItem.trigger
+	}
+
+	return nil
+}
+
+//Put the item into cache with ID of ploicy as key
+func (c *Cache) Put(policyID int64, trigger Interface) {
+	if policyID <= 0 || trigger == nil {
+		return
+	}
+
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	//Exceed the capacity?
+	if c.Size() >= c.capacity {
+		//Pop one for the new one
+		v := heap.Pop(c.queue)
+		item := v.(*Item)
+		//Remove from hash
+		delete(c.hash, c.key(item.policyID))
+	}
+
+	//Add to meta queue
+	item := &Item{
+		policyID:  policyID,
+		frequency: 1,
+	}
+	heap.Push(c.queue, item)
+
+	//Cache
+	cacheItem := CacheItem{
+		trigger: trigger,
+		item:    item,
+	}
+
+	k := c.key(policyID)
+	c.hash[k] = cacheItem
+}
+
+//Remove the trigger attached to the specified policy
+func (c *Cache) Remove(policyID int64) Interface {
+	if policyID > 0 {
+		c.lock.Lock()
+		defer c.lock.Unlock()
+
+		//If existing
+		k := c.key(policyID)
+		if cacheItem, ok := c.hash[k]; ok {
+			//Remove from heap
+			heap.Remove(c.queue, cacheItem.item.index)
+
+			//Remove from hash
+			delete(c.hash, k)
+
+			return cacheItem.trigger
+		}
+
+	}
+
+	return nil
+}
+
+//Size return the count of triggers in the cache
+func (c *Cache) Size() int {
+	return len(c.hash)
+}
+
+//Generate a hash key with the policy ID
+func (c *Cache) key(policyID int64) string {
+	return fmt.Sprintf("trigger-%d", policyID)
+}

src/replication/trigger/cache_test.go

@@ -0,0 +1,53 @@
+package trigger
+
+import "testing"
+import "time"
+
+func TestCache(t *testing.T) {
+	cache := NewCache(10)
+	trigger := NewImmediateTrigger(ImmediateParam{})
+
+	cache.Put(1, trigger)
+	if cache.Size() != 1 {
+		t.Fatalf("Invalid size, expect 1 but got %d", cache.Size())
+	}
+
+	tr := cache.Get(1)
+	if tr == nil {
+		t.Fatal("Should not get nil item")
+	}
+
+	tri := cache.Remove(1)
+	if tri == nil || cache.Size() > 0 {
+		t.Fatal("Failed to remove")
+	}
+}
+
+func TestCacheChange(t *testing.T) {
+	cache := NewCache(2)
+	trigger1 := NewImmediateTrigger(ImmediateParam{})
+	trigger2 := NewImmediateTrigger(ImmediateParam{})
+	cache.Put(1, trigger1)
+	cache.Put(2, trigger2)
+
+	if cache.Size() != 2 {
+		t.Fatalf("Invalid size, expect 2 but got %d", cache.Size())
+	}
+
+	if tr := cache.Get(2); tr == nil {
+		t.Fatal("Should not get nil item")
+	}
+
+	time.Sleep(100 * time.Microsecond)
+
+	trigger3 := NewImmediateTrigger(ImmediateParam{})
+	cache.Put(3, trigger3)
+	if cache.Size() != 2 {
+		t.Fatalf("Invalid size, expect 2 but got %d", cache.Size())
+	}
+
+	if tr := cache.Get(1); tr != nil {
+		t.Fatal("item1 should not exist")
+	}
+
+}

src/replication/trigger/immediate.go

@@ -0,0 +1,46 @@
+package trigger
+
+import (
+	"github.com/vmware/harbor/src/replication"
+)
+
+//ImmediateTrigger will setup watcher at the image pushing action to fire
+//replication event at pushing happening time.
+type ImmediateTrigger struct {
+	params ImmediateParam
+}
+
+//NewImmediateTrigger is constructor of ImmediateTrigger
+func NewImmediateTrigger(params ImmediateParam) *ImmediateTrigger {
+	return &ImmediateTrigger{
+		params: params,
+	}
+}
+
+//Kind is the implementation of same method defined in Trigger interface
+func (st *ImmediateTrigger) Kind() string {
+	return replication.TriggerKindImmediate
+}
+
+//Setup is the implementation of same method defined in Trigger interface
+func (st *ImmediateTrigger) Setup() error {
+	//TODO: Need more complicated logic here to handle partial updates
+	for _, namespace := range st.params.Namespaces {
+		wt := WatchItem{
+			PolicyID:   st.params.PolicyID,
+			Namespace:  namespace,
+			OnDeletion: st.params.OnDeletion,
+			OnPush:     true,
+		}
+
+		if err := DefaultWatchList.Add(wt); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+//Unset is the implementation of same method defined in Trigger interface
+func (st *ImmediateTrigger) Unset() error {
+	return DefaultWatchList.Remove(st.params.PolicyID)
+}

src/replication/trigger/immediate_test.go

@@ -0,0 +1,57 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trigger
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/utils/test"
+	"github.com/vmware/harbor/src/replication"
+)
+
+func TestKindOfImmediateTrigger(t *testing.T) {
+	trigger := NewImmediateTrigger(ImmediateParam{})
+	assert.Equal(t, replication.TriggerKindImmediate, trigger.Kind())
+}
+
+func TestSetupAndUnsetOfImmediateTrigger(t *testing.T) {
+	dao.DefaultDatabaseWatchItemDAO = &test.FakeWatchItemDAO{}
+
+	param := ImmediateParam{}
+	param.PolicyID = 1
+	param.OnDeletion = true
+	param.Namespaces = []string{"library"}
+	trigger := NewImmediateTrigger(param)
+
+	err := trigger.Setup()
+	require.Nil(t, err)
+
+	items, err := DefaultWatchList.Get("library", "push")
+	require.Nil(t, err)
+	assert.Equal(t, 1, len(items))
+
+	items, err = DefaultWatchList.Get("library", "delete")
+	require.Nil(t, err)
+	assert.Equal(t, 1, len(items))
+
+	err = trigger.Unset()
+	require.Nil(t, err)
+	items, err = DefaultWatchList.Get("library", "delete")
+	require.Nil(t, err)
+	assert.Equal(t, 0, len(items))
+}

src/replication/trigger/interface.go

@@ -0,0 +1,13 @@
+package trigger
+
+//Interface is certian mechanism to know when fire the replication operation.
+type Interface interface {
+	//Kind indicates what type of the trigger is.
+	Kind() string
+
+	//Setup/enable the trigger; if failed, an error would be returned.
+	Setup() error
+
+	//Remove/disable the trigger; if failed, an error would be returned.
+	Unset() error
+}

src/replication/trigger/manager.go

@@ -0,0 +1,124 @@
+package trigger
+
+import (
+	"fmt"
+
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+//Manager provides unified methods to manage the triggers of policies;
+//Cache the enabled triggers, setup/unset the trigger based on the parameters
+//with json format.
+type Manager struct {
+	//Cache for triggers
+	//cache *Cache
+}
+
+//NewManager is the constructor of trigger manager.
+//capacity is the max number of trigger references manager can keep in memory
+func NewManager(capacity int) *Manager {
+	return &Manager{
+	//cache: NewCache(capacity),
+	}
+}
+
+/*
+//GetTrigger returns the enabled trigger reference if existing in the cache.
+func (m *Manager) GetTrigger(policyID int64) Interface {
+	return m.cache.Get(policyID)
+}
+
+//RemoveTrigger will disable the trigger and remove it from the cache if existing.
+func (m *Manager) RemoveTrigger(policyID int64) error {
+	trigger := m.cache.Get(policyID)
+	if trigger == nil {
+		return errors.New("Trigger is not cached, please use UnsetTrigger to disable the trigger")
+	}
+
+	//Unset trigger
+	if err := trigger.Unset(); err != nil {
+		return err
+	}
+
+	//Remove from cache
+	//No need to check the return of remove because the dirty item cached in the cache
+	//will be removed out finally after a certain while
+	m.cache.Remove(policyID)
+
+	return nil
+}
+*/
+
+//SetupTrigger will create the new trigger based on the provided policy.
+//If failed, an error will be returned.
+func (m *Manager) SetupTrigger(policy *models.ReplicationPolicy) error {
+	trigger, err := createTrigger(policy)
+	if err != nil {
+		return err
+	}
+
+	// manual trigger, do nothing
+	if trigger == nil {
+		return nil
+	}
+
+	tg := trigger.(Interface)
+	if err = tg.Setup(); err != nil {
+		return err
+	}
+
+	log.Debugf("%s trigger for policy %d is set", tg.Kind(), policy.ID)
+	return nil
+}
+
+//UnsetTrigger will disable the trigger which is not cached in the trigger cache.
+func (m *Manager) UnsetTrigger(policy *models.ReplicationPolicy) error {
+	trigger, err := createTrigger(policy)
+	if err != nil {
+		return err
+	}
+
+	// manual trigger, do nothing
+	if trigger == nil {
+		return nil
+	}
+
+	tg := trigger.(Interface)
+	if err = tg.Unset(); err != nil {
+		return err
+	}
+
+	log.Debugf("%s trigger for policy %d is unset", tg.Kind(), policy.ID)
+	return nil
+}
+
+func createTrigger(policy *models.ReplicationPolicy) (interface{}, error) {
+	if policy == nil || policy.Trigger == nil {
+		return nil, fmt.Errorf("empty policy or trigger")
+	}
+
+	trigger := policy.Trigger
+	switch trigger.Kind {
+	case replication.TriggerKindSchedule:
+		param := ScheduleParam{}
+		param.PolicyID = policy.ID
+		param.Type = trigger.ScheduleParam.Type
+		param.Weekday = trigger.ScheduleParam.Weekday
+		param.Offtime = trigger.ScheduleParam.Offtime
+
+		return NewScheduleTrigger(param), nil
+	case replication.TriggerKindImmediate:
+		param := ImmediateParam{}
+		param.PolicyID = policy.ID
+		param.OnDeletion = policy.ReplicateDeletion
+		param.Namespaces = policy.Namespaces
+
+		return NewImmediateTrigger(param), nil
+	case replication.TriggerKindManual:
+		return nil, nil
+	default:
+		return nil, fmt.Errorf("invalid trigger type: %s", trigger.Kind)
+	}
+}

src/replication/trigger/manager_test.go

@@ -0,0 +1,96 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trigger
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/vmware/harbor/src/replication"
+	"github.com/vmware/harbor/src/replication/models"
+)
+
+func TestCreateTrigger(t *testing.T) {
+	// nil policy
+	_, err := createTrigger(nil)
+	require.NotNil(t, err)
+
+	// nil trigger
+	_, err = createTrigger(&models.ReplicationPolicy{})
+	require.NotNil(t, err)
+
+	// schedule trigger
+	trigger, err := createTrigger(&models.ReplicationPolicy{
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindSchedule,
+			ScheduleParam: &models.ScheduleParam{
+				Type:    replication.TriggerScheduleWeekly,
+				Weekday: 1,
+				Offtime: 1,
+			},
+		},
+	})
+	require.Nil(t, err)
+	assert.NotNil(t, trigger)
+
+	// immediate trigger
+	trigger, err = createTrigger(&models.ReplicationPolicy{
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindImmediate,
+		},
+	})
+	require.Nil(t, err)
+	assert.NotNil(t, trigger)
+
+	// manual trigger
+	trigger, err = createTrigger(&models.ReplicationPolicy{
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindManual,
+		},
+	})
+	require.Nil(t, err)
+	assert.Nil(t, trigger)
+}
+
+func TestSetupTrigger(t *testing.T) {
+	mgr := NewManager(1)
+
+	err := mgr.SetupTrigger(&models.ReplicationPolicy{
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindSchedule,
+			ScheduleParam: &models.ScheduleParam{
+				Type:    replication.TriggerScheduleDaily,
+				Offtime: 1,
+			},
+		},
+	})
+	assert.Nil(t, err)
+}
+
+func TestUnsetTrigger(t *testing.T) {
+	mgr := NewManager(1)
+
+	err := mgr.UnsetTrigger(&models.ReplicationPolicy{
+		Trigger: &models.Trigger{
+			Kind: replication.TriggerKindSchedule,
+			ScheduleParam: &models.ScheduleParam{
+				Type:    replication.TriggerScheduleDaily,
+				Offtime: 1,
+			},
+		},
+	})
+	assert.Nil(t, err)
+}

src/replication/trigger/param_immediate.go

@@ -0,0 +1,22 @@
+package trigger
+
+//NOTES: Whether replicate the existing images when the type of trigger is
+//'Immediate' is a once-effective setting which will not be persisted
+// and kept as one parameter of 'Immediate' trigger. It will only be
+//covered by the UI logic.
+
+//ImmediateParam defines the parameter of immediate trigger
+type ImmediateParam struct {
+	//Basic parameters
+	BasicParam
+
+	//Namepaces
+	Namespaces []string
+}
+
+//Parse is the implementation of same method in TriggerParam interface
+//NOTES: No need to implement this method for 'Immediate' trigger as
+//it does not have any parameters with json format.
+func (ip ImmediateParam) Parse(param string) error {
+	return nil
+}

src/replication/trigger/param_schedule.go

@@ -0,0 +1,30 @@
+package trigger
+
+import (
+	"encoding/json"
+	"errors"
+)
+
+//ScheduleParam defines the parameter of schedule trigger
+type ScheduleParam struct {
+	//Basic parameters
+	BasicParam
+
+	//Daily or weekly
+	Type string
+
+	//Optional, only used when type is 'weekly'
+	Weekday int8
+
+	//The time offset with the UTC 00:00 in seconds
+	Offtime int64
+}
+
+//Parse is the implementation of same method in TriggerParam interface
+func (stp ScheduleParam) Parse(param string) error {
+	if len(param) == 0 {
+		return errors.New("Parameter of schedule trigger should not be empty")
+	}
+
+	return json.Unmarshal([]byte(param), &stp)
+}

src/replication/trigger/schedule.go

@@ -0,0 +1,58 @@
+package trigger
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/vmware/harbor/src/common/scheduler"
+	"github.com/vmware/harbor/src/common/scheduler/policy"
+	replication_task "github.com/vmware/harbor/src/common/scheduler/task/replication"
+	"github.com/vmware/harbor/src/replication"
+)
+
+//ScheduleTrigger will schedule a alternate policy to provide 'daily' and 'weekly' trigger ways.
+type ScheduleTrigger struct {
+	params ScheduleParam
+}
+
+//NewScheduleTrigger is constructor of ScheduleTrigger
+func NewScheduleTrigger(params ScheduleParam) *ScheduleTrigger {
+	return &ScheduleTrigger{
+		params: params,
+	}
+}
+
+//Kind is the implementation of same method defined in Trigger interface
+func (st *ScheduleTrigger) Kind() string {
+	return replication.TriggerKindSchedule
+}
+
+//Setup is the implementation of same method defined in Trigger interface
+func (st *ScheduleTrigger) Setup() error {
+	config := &policy.AlternatePolicyConfiguration{}
+	switch st.params.Type {
+	case replication.TriggerScheduleDaily:
+		config.Duration = 24 * 3600 * time.Second
+		config.OffsetTime = st.params.Offtime
+	case replication.TriggerScheduleWeekly:
+		config.Duration = 7 * 24 * 3600 * time.Second
+		config.OffsetTime = st.params.Offtime
+		config.Weekday = st.params.Weekday
+	default:
+		return fmt.Errorf("unsupported schedual trigger type: %s", st.params.Type)
+	}
+
+	schedulePolicy := policy.NewAlternatePolicy(assembleName(st.params.PolicyID), config)
+	attachTask := replication_task.NewTask(st.params.PolicyID)
+	schedulePolicy.AttachTasks(attachTask)
+	return scheduler.DefaultScheduler.Schedule(schedulePolicy)
+}
+
+//Unset is the implementation of same method defined in Trigger interface
+func (st *ScheduleTrigger) Unset() error {
+	return scheduler.DefaultScheduler.UnSchedule(assembleName(st.params.PolicyID))
+}
+
+func assembleName(policyID int64) string {
+	return fmt.Sprintf("replication_policy_%d", policyID)
+}

src/replication/trigger/schedule_test.go

@@ -0,0 +1,63 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package trigger
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/vmware/harbor/src/common/scheduler"
+	"github.com/vmware/harbor/src/replication"
+)
+
+func TestAssembleName(t *testing.T) {
+	assert.Equal(t, "replication_policy_1", assembleName(1))
+}
+
+func TestKindOfScheduleTrigger(t *testing.T) {
+	trigger := NewScheduleTrigger(ScheduleParam{})
+	assert.Equal(t, replication.TriggerKindSchedule, trigger.Kind())
+}
+
+func TestSetupAndUnSetOfScheduleTrigger(t *testing.T) {
+	// invalid schedule param
+	trigger := NewScheduleTrigger(ScheduleParam{})
+	assert.NotNil(t, trigger.Setup())
+
+	// valid schedule param
+	var policyID int64 = 1
+	trigger = NewScheduleTrigger(ScheduleParam{
+		BasicParam: BasicParam{
+			PolicyID: policyID,
+		},
+		Type:    replication.TriggerScheduleWeekly,
+		Weekday: (int8(time.Now().Weekday()) + 1) % 7,
+		Offtime: 0,
+	})
+
+	count := scheduler.DefaultScheduler.PolicyCount()
+	require.Nil(t, scheduler.DefaultScheduler.GetPolicy(assembleName(policyID)))
+
+	require.Nil(t, trigger.Setup())
+
+	assert.Equal(t, count+1, scheduler.DefaultScheduler.PolicyCount())
+	assert.NotNil(t, scheduler.DefaultScheduler.GetPolicy(assembleName(policyID)))
+
+	require.Nil(t, trigger.Unset())
+	assert.Equal(t, count, scheduler.DefaultScheduler.PolicyCount())
+	assert.Nil(t, scheduler.DefaultScheduler.GetPolicy(assembleName(policyID)))
+}

src/replication/trigger/trigger_param.go

@@ -0,0 +1,17 @@
+package trigger
+
+//BasicParam contains the general parameters for all triggers
+type BasicParam struct {
+	//ID of the related policy
+	PolicyID int64
+
+	//Whether delete remote replicated images if local ones are deleted
+	OnDeletion bool
+}
+
+//Parameter defines operation of doing initialization from parameter json text
+type Parameter interface {
+	//Decode parameter with json style to the owner struct
+	//If failed, an error will be returned
+	Parse(param string) error
+}

src/replication/trigger/watch_list.go

@@ -0,0 +1,65 @@
+package trigger
+
+import (
+	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/models"
+)
+
+//DefaultWatchList is the default instance of WatchList
+var DefaultWatchList = &WatchList{}
+
+//WatchList contains the items which should be evaluated for replication
+//when image pushing or deleting happens.
+type WatchList struct{}
+
+//WatchItem keeps the related data for evaluation in WatchList.
+type WatchItem struct {
+	//ID of policy
+	PolicyID int64
+
+	//Corresponding namespace
+	Namespace string
+
+	//For deletion event
+	OnDeletion bool
+
+	//For pushing event
+	OnPush bool
+}
+
+//Add item to the list and persist into DB
+func (wl *WatchList) Add(item WatchItem) error {
+	_, err := dao.DefaultDatabaseWatchItemDAO.Add(
+		&models.WatchItem{
+			PolicyID:   item.PolicyID,
+			Namespace:  item.Namespace,
+			OnPush:     item.OnPush,
+			OnDeletion: item.OnDeletion,
+		})
+	return err
+}
+
+//Remove the specified watch item from list
+func (wl *WatchList) Remove(policyID int64) error {
+	return dao.DefaultDatabaseWatchItemDAO.DeleteByPolicyID(policyID)
+}
+
+//Get the watch items according to the namespace and operation
+func (wl *WatchList) Get(namespace, operation string) ([]WatchItem, error) {
+	items, err := dao.DefaultDatabaseWatchItemDAO.Get(namespace, operation)
+	if err != nil {
+		return nil, err
+	}
+
+	watchItems := []WatchItem{}
+	for _, item := range items {
+		watchItems = append(watchItems, WatchItem{
+			PolicyID:   item.PolicyID,
+			Namespace:  item.Namespace,
+			OnPush:     item.OnPush,
+			OnDeletion: item.OnDeletion,
+		})
+	}
+
+	return watchItems, nil
+}