Paper/Spigot-API-Patches/0149-Performance-Concurrency-Improvements-to-Permissions.patch
Zach Brown 70ce6ce831
Move version command update checking to the implementation
This makes it easier for downstream projects (forks) to replace the
version fetching system with their own. It is as simple as implementing
an interface and overriding the default implementation of
org.bukkit.UnsafeValues#getVersionFetcher()

It also makes it easier for us to organize things like the version
history feature.

Lastly I have updated the paper implementation to check against the site
API rather than against jenkins.
2019-05-27 04:13:41 -05:00

117 lines
5.1 KiB
Diff

From 31a97ee3841d55754647d0751fed2a488e4139e3 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 13 Sep 2018 20:51:50 -0400
Subject: [PATCH] Performance & Concurrency Improvements to Permissions
Modifying of permissions was only half protected, enabling concurrency
issues to occur if permissions were modified async.
While no plugin really should be doing that, modifying operations
are not heavily called, so they are safe to add synchronization to.
Now, all modification API's will be synchronized ensuring safety.
Additionally, hasPermission was victim to a common java newbie mistake
of calling if (containsKey(k)) return get(k), resulting in 2 map lookups.
Optimized it to simply be a single get call cutting permission map
lookups in half.
diff --git a/src/main/java/org/bukkit/permissions/PermissibleBase.java b/src/main/java/org/bukkit/permissions/PermissibleBase.java
index 497775f7..c94e4cdb 100644
--- a/src/main/java/org/bukkit/permissions/PermissibleBase.java
+++ b/src/main/java/org/bukkit/permissions/PermissibleBase.java
@@ -75,8 +75,11 @@ public class PermissibleBase implements Permissible {
String name = inName.toLowerCase(java.util.Locale.ENGLISH);
- if (isPermissionSet(name)) {
- return permissions.get(name).getValue();
+ // Paper start
+ PermissionAttachmentInfo info = permissions.get(name);
+ if (info != null) {
+ return info.getValue();
+ // Paper end
} else {
Permission perm = Bukkit.getServer().getPluginManager().getPermission(name);
@@ -96,15 +99,18 @@ public class PermissibleBase implements Permissible {
String name = perm.getName().toLowerCase(java.util.Locale.ENGLISH);
- if (isPermissionSet(name)) {
- return permissions.get(name).getValue();
+ // Paper start
+ PermissionAttachmentInfo info = permissions.get(name);
+ if (info != null) {
+ return info.getValue();
}
+ // Paper end
return perm.getDefault().getValue(isOp());
}
@Override
@NotNull
- public PermissionAttachment addAttachment(@NotNull Plugin plugin, @NotNull String name, boolean value) {
+ public synchronized PermissionAttachment addAttachment(@NotNull Plugin plugin, @NotNull String name, boolean value) { // Paper - synchronized
if (name == null) {
throw new IllegalArgumentException("Permission name cannot be null");
} else if (plugin == null) {
@@ -123,7 +129,7 @@ public class PermissibleBase implements Permissible {
@Override
@NotNull
- public PermissionAttachment addAttachment(@NotNull Plugin plugin) {
+ public synchronized PermissionAttachment addAttachment(@NotNull Plugin plugin) { // Paper - synchronized
if (plugin == null) {
throw new IllegalArgumentException("Plugin cannot be null");
} else if (!plugin.isEnabled()) {
@@ -139,7 +145,7 @@ public class PermissibleBase implements Permissible {
}
@Override
- public void removeAttachment(@NotNull PermissionAttachment attachment) {
+ public synchronized void removeAttachment(@NotNull PermissionAttachment attachment) { // Paper - synchronized
if (attachment == null) {
throw new IllegalArgumentException("Attachment cannot be null");
}
@@ -159,7 +165,7 @@ public class PermissibleBase implements Permissible {
}
@Override
- public void recalculatePermissions() {
+ public synchronized void recalculatePermissions() { // Paper - synchronized
clearPermissions();
Set<Permission> defaults = Bukkit.getServer().getPluginManager().getDefaultPermissions(isOp());
Bukkit.getServer().getPluginManager().subscribeToDefaultPerms(isOp(), parent);
@@ -208,7 +214,7 @@ public class PermissibleBase implements Permissible {
@Override
@Nullable
- public PermissionAttachment addAttachment(@NotNull Plugin plugin, @NotNull String name, boolean value, int ticks) {
+ public synchronized PermissionAttachment addAttachment(@NotNull Plugin plugin, @NotNull String name, boolean value, int ticks) { // Paper
if (name == null) {
throw new IllegalArgumentException("Permission name cannot be null");
} else if (plugin == null) {
@@ -228,7 +234,7 @@ public class PermissibleBase implements Permissible {
@Override
@Nullable
- public PermissionAttachment addAttachment(@NotNull Plugin plugin, int ticks) {
+ public synchronized PermissionAttachment addAttachment(@NotNull Plugin plugin, int ticks) { // Paper - synchronized
if (plugin == null) {
throw new IllegalArgumentException("Plugin cannot be null");
} else if (!plugin.isEnabled()) {
@@ -248,7 +254,7 @@ public class PermissibleBase implements Permissible {
@Override
@NotNull
- public Set<PermissionAttachmentInfo> getEffectivePermissions() {
+ public synchronized Set<PermissionAttachmentInfo> getEffectivePermissions() { // Paper - synchronized
return new HashSet<PermissionAttachmentInfo>(permissions.values());
}
--
2.21.0