Merge pull request #15 from DMarby/master

Character Type Metrics

src/main/java/net/citizensnpcs/Citizens.java

@@ -19,6 +19,7 @@ import net.citizensnpcs.api.util.DatabaseStorage;
 import net.citizensnpcs.api.util.NBTStorage;
 import net.citizensnpcs.api.util.Storage;
 import net.citizensnpcs.api.util.YamlStorage;
+import net.citizensnpcs.api.npc.character.Character;
 import net.citizensnpcs.command.CommandManager;
 import net.citizensnpcs.command.Injector;
 import net.citizensnpcs.command.command.AdminCommands;
@@ -167,15 +168,14 @@ public class Citizens extends JavaPlugin {
         if (getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable() {
             @Override
             public void run() {
-                setupNPCs();
+                setupNPCs(); 
+                // Run metrics "last"
+                startMetrics();
             }
         }) == -1) {
             Messaging.log(Level.SEVERE, "Issue enabling plugin. Disabling.");
             getServer().getPluginManager().disablePlugin(this);
         }
-
-        // Run metrics last
-        startMetrics();
     }
 
     private void startMetrics() {
@@ -183,19 +183,24 @@ public class Citizens extends JavaPlugin {
             @Override
             public void run() {
                 try {
-                    Metrics metrics = new Metrics();
-                    metrics.addCustomData(Citizens.this, new Metrics.Plotter() {
-                        @Override
-                        public String getColumnName() {
-                            return "Total NPCs";
-                        }
-
+                    Metrics metrics = new Metrics(Citizens.this);
+                    metrics.addCustomData(new Metrics.Plotter("Total NPCs") {
                         @Override
                         public int getValue() {
                             return Iterators.size(npcManager.iterator());
                         }
                     });
-                    metrics.beginMeasuringPlugin(Citizens.this);
+                    Metrics.Graph graph = metrics.createGraph("Character Type Usage");
+                    Messaging.log("Starting Metrics");
+                    for(Character character : characterManager.getRegistered()){                        
+                        graph.addPlotter(new Metrics.Plotter(StringHelper.capitalize(character.getName())) {
+                            @Override
+                            public int getValue() {
+                                return 1;
+                            }
+                        });
+                    }
+                    metrics.start();
                 } catch (IOException ex) {
                     Messaging.log("Unable to load metrics");
                 }

src/main/java/net/citizensnpcs/npc/CitizensCharacterManager.java

@@ -27,4 +27,7 @@ public class CitizensCharacterManager implements CharacterManager {
             ex.printStackTrace();
         }
     }
+    public Iterable<Character> getRegistered(){
+        return registered.values();
+    }
 }

src/main/java/net/citizensnpcs/util/Metrics.java

@@ -27,6 +27,12 @@
  */
 package net.citizensnpcs.util;
 
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.configuration.InvalidConfigurationException;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.PluginDescriptionFile;
+
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
@@ -38,26 +44,109 @@ import java.net.URL;
 import java.net.URLConnection;
 import java.net.URLEncoder;
 import java.util.Collections;
-import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
 import java.util.LinkedHashSet;
-import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
+import java.util.logging.Level;
 
-import org.bukkit.Bukkit;
-import org.bukkit.configuration.file.YamlConfiguration;
-import org.bukkit.plugin.Plugin;
-
+/**
+ * <p>
+ * The metrics class obtains data about a plugin and submits statistics about it to the metrics backend.
+ * </p>
+ * <p>
+ * Public methods provided by this class:
+ * </p>
+ * <code>
+ * Graph createGraph(String name); <br/>
+ * void addCustomData(Metrics.Plotter plotter); <br/>
+ * void start(); <br/>
+ * </code>
+ */
 public class Metrics {
+
+    /**
+     * The current revision number
+     */
+    private final static int REVISION = 5;
+
+    /**
+     * The base url of the metrics domain
+     */
+    private static final String BASE_URL = "http://mcstats.org";
+
+    /**
+     * The url used to report a server's status
+     */
+    private static final String REPORT_URL = "/report/%s";
+
+    /**
+     * The file where guid and opt out is stored in
+     */
+    private static final String CONFIG_FILE = "plugins/PluginMetrics/config.yml";
+
+    /**
+     * The separator to use for custom data. This MUST NOT change unless you are hosting your own
+     * version of metrics and want to change it.
+     */
+    private static final String CUSTOM_DATA_SEPARATOR = "~~";
+
+    /**
+     * Interval of time to ping (in minutes)
+     */
+    private static final int PING_INTERVAL = 10;
+
+    /**
+     * The plugin this metrics submits for
+     */
+    private final Plugin plugin;
+
+    /**
+     * All of the custom graphs to submit to metrics
+     */
+    private final Set<Graph> graphs = Collections.synchronizedSet(new HashSet<Graph>());
+
+    /**
+     * The default graph, used for addCustomData when you don't want a specific graph
+     */
+    private final Graph defaultGraph = new Graph("Default");
+
+    /**
+     * The plugin configuration file
+     */
     private final YamlConfiguration configuration;
-    private final Map<Plugin, Set<Plotter>> customData = Collections
-            .synchronizedMap(new HashMap<Plugin, Set<Plotter>>());
+    
+    /**
+     * The plugin configuration file
+     */
+    private final File configurationFile;
+
+    /**
+     * Unique server id
+     */
     private final String guid;
 
-    public Metrics() throws IOException {
+    /**
+     * Lock for synchronization
+     */
+    private final Object optOutLock = new Object();
+
+    /**
+     * Id of the scheduled task
+     */
+    private volatile int taskId = -1;
+
+    public Metrics(final Plugin plugin) throws IOException {
+        if (plugin == null) {
+            throw new IllegalArgumentException("Plugin cannot be null");
+        }
+
+        this.plugin = plugin;
+
         // load the config
-        File file = new File(CONFIG_FILE);
-        configuration = YamlConfiguration.loadConfiguration(file);
+        configurationFile = new File(CONFIG_FILE);
+        configuration = YamlConfiguration.loadConfiguration(configurationFile);
 
         // add some defaults
         configuration.addDefault("opt-out", false);
@@ -65,87 +154,226 @@ public class Metrics {
 
         // Do we need to create the file?
         if (configuration.get("guid", null) == null) {
-            configuration.options().header("http://metrics.griefcraft.com").copyDefaults(true);
-            configuration.save(file);
+            configuration.options().header("http://mcstats.org").copyDefaults(true);
+            configuration.save(configurationFile);
         }
 
         // Load the guid then
         guid = configuration.getString("guid");
     }
 
-    public void addCustomData(Plugin plugin, Plotter plotter) {
-        Set<Plotter> plotters = customData.get(plugin);
-
-        if (plotters == null) {
-            plotters = Collections.synchronizedSet(new LinkedHashSet<Plotter>());
-            customData.put(plugin, plotters);
+    /**
+     * Construct and create a Graph that can be used to separate specific plotters to their own graphs
+     * on the metrics website. Plotters can be added to the graph object returned.
+     *
+     * @param name
+     * @return Graph object created. Will never return NULL under normal circumstances unless bad parameters are given
+     */
+    public Graph createGraph(final String name) {
+        if (name == null) {
+            throw new IllegalArgumentException("Graph name cannot be null");
         }
 
-        plotters.add(plotter);
+        // Construct the graph object
+        final Graph graph = new Graph(name);
+
+        // Now we can add our graph
+        graphs.add(graph);
+
+        // and return back
+        return graph;
     }
 
-    public void beginMeasuringPlugin(final Plugin plugin) throws IOException {
-        // Did we opt out?
-        if (configuration.getBoolean("opt-out", false)) {
-            return;
+    /**
+     * Adds a custom data plotter to the default graph
+     *
+     * @param plotter
+     */
+    public void addCustomData(final Plotter plotter) {
+        if (plotter == null) {
+            throw new IllegalArgumentException("Plotter cannot be null");
         }
 
-        // First tell the server about us
-        postPlugin(plugin, false);
+        // Add the plotter to the graph o/
+        defaultGraph.addPlotter(plotter);
 
-        // Ping the server in intervals
-        plugin.getServer().getScheduler().scheduleAsyncRepeatingTask(plugin, new Runnable() {
-            @Override
-            public void run() {
-                try {
-                    postPlugin(plugin, true);
-                } catch (IOException e) {
-                    System.out.println("[Metrics] " + e.getMessage());
-                }
+        // Ensure the default graph is included in the submitted graphs
+        graphs.add(defaultGraph);
+    }
+
+    /**
+     * Start measuring statistics. This will immediately create an async repeating task as the plugin and send
+     * the initial data to the metrics backend, and then after that it will post in increments of
+     * PING_INTERVAL * 1200 ticks.
+     *
+     * @return True if statistics measuring is running, otherwise false.
+     */
+    public boolean start() {
+        synchronized (optOutLock) {
+            // Did we opt out?
+            if (isOptOut()) {
+                return false;
             }
-        }, PING_INTERVAL * 1200, PING_INTERVAL * 1200);
-    }
 
-    private boolean isMineshafterPresent() {
-        try {
-            Class.forName("mineshafter.MineServer");
+            // Is metrics already running?
+            if (taskId >= 0) {
+                return true;
+            }
+
+            // Begin hitting the server with glorious data
+            taskId = plugin.getServer().getScheduler().scheduleAsyncRepeatingTask(plugin, new Runnable() {
+
+                private boolean firstPost = true;
+
+                public void run() {
+                    try {
+                        // This has to be synchronized or it can collide with the disable method.
+                        synchronized (optOutLock) {
+                            // Disable Task, if it is running and the server owner decided to opt-out
+                            if (isOptOut() && taskId > 0) {
+                                plugin.getServer().getScheduler().cancelTask(taskId);
+                                taskId = -1;
+                            }
+                        }
+
+                        // We use the inverse of firstPost because if it is the first time we are posting,
+                        // it is not a interval ping, so it evaluates to FALSE
+                        // Each time thereafter it will evaluate to TRUE, i.e PING!
+                        postPlugin(!firstPost);
+
+                        // After the first post we set firstPost to false
+                        // Each post thereafter will be a ping
+                        firstPost = false;
+                    } catch (IOException e) {
+                        Bukkit.getLogger().log(Level.INFO, "[Metrics] " + e.getMessage());
+                    }
+                }
+            }, 0, PING_INTERVAL * 1200);
+
             return true;
-        } catch (Exception e) {
-            return false;
         }
     }
 
-    private void postPlugin(Plugin plugin, boolean isPing) throws IOException {
+    /**
+     * Has the server owner denied plugin metrics?
+     *
+     * @return
+     */
+    public boolean isOptOut() {
+        synchronized(optOutLock) {
+            try {
+                // Reload the metrics file
+                configuration.load(CONFIG_FILE);
+            } catch (IOException ex) {
+                Bukkit.getLogger().log(Level.INFO, "[Metrics] " + ex.getMessage());
+                return true;
+            } catch (InvalidConfigurationException ex) {
+                Bukkit.getLogger().log(Level.INFO, "[Metrics] " + ex.getMessage());
+                return true;
+            }
+            return configuration.getBoolean("opt-out", false);
+        }
+    }
+
+    /**
+    * Enables metrics for the server by setting "opt-out" to false in the config file and starting the metrics task.
+    *
+    * @throws IOException
+    */
+    public void enable() throws IOException {
+        // This has to be synchronized or it can collide with the check in the task.
+        synchronized (optOutLock) {
+        	// Check if the server owner has already set opt-out, if not, set it.
+        	if (isOptOut()) {
+        		configuration.set("opt-out", false);
+        		configuration.save(configurationFile);
+        	}
+
+        	// Enable Task, if it is not running
+        	if (taskId < 0) {
+        		start();
+        	}
+        }
+    }
+
+    /**
+     * Disables metrics for the server by setting "opt-out" to true in the config file and canceling the metrics task.
+     *
+     * @throws IOException
+     */
+    public void disable() throws IOException {
+        // This has to be synchronized or it can collide with the check in the task.
+        synchronized (optOutLock) {
+            // Check if the server owner has already set opt-out, if not, set it.
+            if (!isOptOut()) {
+                configuration.set("opt-out", true);
+                configuration.save(configurationFile);
+            }
+
+            // Disable Task, if it is running
+            if (taskId > 0) {
+                this.plugin.getServer().getScheduler().cancelTask(taskId);
+                taskId = -1;
+            }
+        }
+    }
+
+    /**
+     * Generic method that posts a plugin to the metrics website
+     */
+    private void postPlugin(final boolean isPing) throws IOException {
+        // The plugin's description file containg all of the plugin data such as name, version, author, etc
+        final PluginDescriptionFile description = plugin.getDescription();
+
         // Construct the post data
-        String response = "ERR No response";
-        String data = encode("guid") + '=' + encode(guid) + '&' + encode("version") + '='
-                + encode(plugin.getDescription().getVersion()) + '&' + encode("server") + '='
-                + encode(Bukkit.getVersion()) + '&' + encode("players") + '='
-                + encode(String.valueOf(Bukkit.getServer().getOnlinePlayers().length)) + '&' + encode("revision") + '='
-                + encode(REVISION + "");
+        final StringBuilder data = new StringBuilder();
+        data.append(encode("guid")).append('=').append(encode(guid));
+        encodeDataPair(data, "version", description.getVersion());
+        encodeDataPair(data, "server", Bukkit.getVersion());
+        encodeDataPair(data, "players", Integer.toString(Bukkit.getServer().getOnlinePlayers().length));
+        encodeDataPair(data, "revision", String.valueOf(REVISION));
 
         // If we're pinging, append it
         if (isPing) {
-            data += '&' + encode("ping") + '=' + encode("true");
+            encodeDataPair(data, "ping", "true");
         }
 
-        // Add any custom data (if applicable)
-        Set<Plotter> plotters = customData.get(plugin);
+        // Acquire a lock on the graphs, which lets us make the assumption we also lock everything
+        // inside of the graph (e.g plotters)
+        synchronized (graphs) {
+            final Iterator<Graph> iter = graphs.iterator();
 
-        if (plotters != null) {
-            for (Plotter plotter : plotters) {
-                data += "&" + encode("Custom" + plotter.getColumnName()) + "="
-                        + encode(Integer.toString(plotter.getValue()));
+            while (iter.hasNext()) {
+                final Graph graph = iter.next();
+
+                // Because we have a lock on the graphs set already, it is reasonable to assume
+                // that our lock transcends down to the individual plotters in the graphs also.
+                // Because our methods are private, no one but us can reasonably access this list
+                // without reflection so this is a safe assumption without adding more code.
+                for (Plotter plotter : graph.getPlotters()) {
+                    // The key name to send to the metrics server
+                    // The format is C-GRAPHNAME-PLOTTERNAME where separator - is defined at the top
+                    // Legacy (R4) submitters use the format Custom%s, or CustomPLOTTERNAME
+                    final String key = String.format("C%s%s%s%s", CUSTOM_DATA_SEPARATOR, graph.getName(), CUSTOM_DATA_SEPARATOR, plotter.getColumnName());
+
+                    // The value to send, which for the foreseeable future is just the string
+                    // value of plotter.getValue()
+                    final String value = Integer.toString(plotter.getValue());
+
+                    // Add it to the http post data :)
+                    encodeDataPair(data, key, value);
+                }
             }
         }
 
         // Create the url
-        URL url = new URL(BASE_URL + String.format(REPORT_URL, plugin.getDescription().getName()));
+        URL url = new URL(BASE_URL + String.format(REPORT_URL, encode(plugin.getDescription().getName())));
 
         // Connect to the website
         URLConnection connection;
 
         // Mineshafter creates a socks proxy, so we can safely bypass it
+        // It does not reroute POST requests so we need to go around it
         if (isMineshafterPresent()) {
             connection = url.openConnection(Proxy.NO_PROXY);
         } else {
@@ -155,70 +383,217 @@ public class Metrics {
         connection.setDoOutput(true);
 
         // Write the data
-        OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
-        writer.write(data);
+        final OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
+        writer.write(data.toString());
         writer.flush();
 
         // Now read the response
-        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
-        response = reader.readLine();
+        final BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+        final String response = reader.readLine();
 
         // close resources
         writer.close();
         reader.close();
 
-        if (response.startsWith("ERR")) {
-            throw new IOException(response); // Throw the exception
+        if (response == null || response.startsWith("ERR")) {
+            throw new IOException(response); //Throw the exception
         } else {
             // Is this the first update this hour?
             if (response.contains("OK This is your first update this hour")) {
-                if (plotters != null) {
-                    for (Plotter plotter : plotters) {
-                        plotter.reset();
+                synchronized (graphs) {
+                    final Iterator<Graph> iter = graphs.iterator();
+
+                    while (iter.hasNext()) {
+                        final Graph graph = iter.next();
+
+                        for (Plotter plotter : graph.getPlotters()) {
+                            plotter.reset();
+                        }
                     }
                 }
             }
         }
-        // if (response.startsWith("OK")) - We should get "OK" followed by an
-        // optional description if everything goes right
+        //if (response.startsWith("OK")) - We should get "OK" followed by an optional description if everything goes right
     }
 
-    public static abstract class Plotter {
+    /**
+     * Check if mineshafter is present. If it is, we need to bypass it to send POST requests
+     *
+     * @return
+     */
+    private boolean isMineshafterPresent() {
+        try {
+            Class.forName("mineshafter.MineServer");
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    /**
+     * <p>Encode a key/value data pair to be used in a HTTP post request. This INCLUDES a & so the first
+     * key/value pair MUST be included manually, e.g:</p>
+     * <code>
+     * StringBuffer data = new StringBuffer();
+     * data.append(encode("guid")).append('=').append(encode(guid));
+     * encodeDataPair(data, "version", description.getVersion());
+     * </code>
+     *
+     * @param buffer
+     * @param key
+     * @param value
+     * @return
+     */
+    private static void encodeDataPair(final StringBuilder buffer, final String key, final String value) throws UnsupportedEncodingException {
+        buffer.append('&').append(encode(key)).append('=').append(encode(value));
+    }
+
+    /**
+     * Encode text as UTF-8
+     *
+     * @param text
+     * @return
+     */
+    private static String encode(final String text) throws UnsupportedEncodingException {
+        return URLEncoder.encode(text, "UTF-8");
+    }
+
+    /**
+     * Represents a custom graph on the website
+     */
+    public static class Graph {
+
+        /**
+         * The graph's name, alphanumeric and spaces only :)
+         * If it does not comply to the above when submitted, it is rejected
+         */
+        private final String name;
+
+        /**
+         * The set of plotters that are contained within this graph
+         */
+        private final Set<Plotter> plotters = new LinkedHashSet<Plotter>();
+
+        private Graph(final String name) {
+            this.name = name;
+        }
+
+        /**
+         * Gets the graph's name
+         *
+         * @return
+         */
+        public String getName() {
+            return name;
+        }
+
+        /**
+         * Add a plotter to the graph, which will be used to plot entries
+         *
+         * @param plotter
+         */
+        public void addPlotter(final Plotter plotter) {
+            plotters.add(plotter);
+        }
+
+        /**
+         * Remove a plotter from the graph
+         *
+         * @param plotter
+         */
+        public void removePlotter(final Plotter plotter) {
+            plotters.remove(plotter);
+        }
+
+        /**
+         * Gets an <b>unmodifiable</b> set of the plotter objects in the graph
+         *
+         * @return
+         */
+        public Set<Plotter> getPlotters() {
+            return Collections.unmodifiableSet(plotters);
+        }
 
         @Override
-        public boolean equals(Object object) {
-            if (!(object instanceof Plotter)) {
+        public int hashCode() {
+            return name.hashCode();
+        }
+
+        @Override
+        public boolean equals(final Object object) {
+            if (!(object instanceof Graph)) {
                 return false;
             }
 
-            Plotter plotter = (Plotter) object;
-            return plotter.getColumnName().equals(getColumnName()) && plotter.getValue() == getValue();
+            final Graph graph = (Graph) object;
+            return graph.name.equals(name);
         }
 
-        public abstract String getColumnName();
+    }
 
+    /**
+     * Interface used to collect custom data for a plugin
+     */
+    public static abstract class Plotter {
+
+        /**
+         * The plot's name
+         */
+        private final String name;
+
+        /**
+         * Construct a plotter with the default plot name
+         */
+        public Plotter() {
+            this("Default");
+        }
+
+        /**
+         * Construct a plotter with a specific plot name
+         *
+         * @param name
+         */
+        public Plotter(final String name) {
+            this.name = name;
+        }
+
+        /**
+         * Get the current value for the plotted point
+         *
+         * @return
+         */
         public abstract int getValue();
 
+        /**
+         * Get the column name for the plotted point
+         *
+         * @return the plotted point's column name
+         */
+        public String getColumnName() {
+            return name;
+        }
+
+        /**
+         * Called after the website graphs have been updated
+         */
+        public void reset() {
+        }
+
         @Override
         public int hashCode() {
             return getColumnName().hashCode() + getValue();
         }
 
-        public void reset() {
+        @Override
+        public boolean equals(final Object object) {
+            if (!(object instanceof Plotter)) {
+                return false;
+            }
+
+            final Plotter plotter = (Plotter) object;
+            return plotter.name.equals(name) && plotter.getValue() == getValue();
         }
+
     }
 
-    private static final String BASE_URL = "http://metrics.griefcraft.com";
-
-    private static final String CONFIG_FILE = "plugins/PluginMetrics/config.yml";
-
-    private final static int PING_INTERVAL = 10;
-
-    private static final String REPORT_URL = "/report/%s";
-
-    private final static int REVISION = 4;
-
-    private static String encode(String text) throws UnsupportedEncodingException {
-        return URLEncoder.encode(text, "UTF-8");
-    }
 }