Add the ability to disable metrics in the config file.

ProtocolLib/src/main/java/com/comphenix/protocol/ProtocolConfig.java

@@ -14,6 +14,8 @@ class ProtocolConfig {
 	private static final String SECTION_GLOBAL = "global";
 	private static final String SECTION_AUTOUPDATER = "auto updater";
 	
+	private static final String METRICS_ENABLED = "metrics";
+	
 	private static final String UPDATER_NOTIFY = "notify";
 	private static final String UPDATER_DOWNLAD = "download";
 	private static final String UPDATER_DELAY = "delay";
@@ -119,6 +121,25 @@ class ProtocolConfig {
 		return updater.getLong(UPDATER_LAST_TIME, 0);
 	}
 	
+	/**
+	 * Retrieve whether or not metrics is enabled.
+	 * @return TRUE if metrics is enabled, FALSE otherwise.
+	 */
+	public boolean isMetricsEnabled() {
+		return global.getBoolean(METRICS_ENABLED, true);
+	}
+	
+	/**
+	 * Set whether or not metrics is enabled.
+	 * <p>
+	 * This setting will take effect next time ProtocolLib is started.
+	 * 
+	 * @param enabled - whether or not metrics is enabled.
+	 */
+	public void setMetricsEnabled(boolean enabled) {
+		global.set(METRICS_ENABLED, enabled);
+	}
+	
 	/**
 	 * Set the last time we updated, in seconds since 1970.01.01 00:00.
 	 * @param lastTimeSeconds - new last update time.

ProtocolLib/src/main/java/com/comphenix/protocol/ProtocolLibrary.java

@@ -189,7 +189,9 @@ public class ProtocolLibrary extends JavaPlugin {
 		
 		// Try to enable statistics
 		try {
-			statistisc = new Statistics(this);
+			if (config.isMetricsEnabled()) {
+				statistisc = new Statistics(this);
+			}
 		} catch (IOException e) {
 			reporter.reportDetailed(this, "Unable to enable metrics.", e, statistisc);
 		} catch (Throwable e) {
@@ -310,7 +312,8 @@ public class ProtocolLibrary extends JavaPlugin {
 	/**
 	 * Retrieve the metrics instance used to measure users of this library.
 	 * <p>
-	 * Note that this method may return NULL when the server is reloading or shutting down.
+	 * Note that this method may return NULL when the server is reloading or shutting down. It is also
+	 * NULL if metrics has been disabled.
 	 * @return Metrics instance container.
 	 */
 	public Statistics getStatistics() {

ProtocolLib/src/main/java/com/comphenix/protocol/metrics/Statistics.java

@@ -36,10 +36,11 @@ public class Statistics {
 	
 	public Statistics(Plugin plugin) throws IOException {
 		metrics = new Metrics(plugin);
-		metrics.start();
 		
 		// Determine who is using this library
 		addPluginUserGraph(metrics);
+		
+		metrics.start();
 	}
 	
 	private void addPluginUserGraph(Metrics metrics) {

ProtocolLib/src/main/java/com/comphenix/protocol/metrics/Updater.java

@@ -333,7 +333,7 @@ public class Updater
                 downloaded += count;
                 fout.write(data, 0, count);
                 int percent = (int) (downloaded * 100 / fileLength);
-                if(announce & (percent % 10 == 0))
+                if(announce && (percent % 10 == 0))
                 {
                     logger.info("Downloading update: " + percent + "% of " + fileLength + " bytes.");
                 }

ProtocolLib/src/main/resources/config.yml

@@ -7,4 +7,6 @@ global:
     # Number of seconds to wait until a new update is downloaded
     delay: 43200 # 12 hours
     # Last update time
-    last: 0
+    last: 0
+ 
+  metrics: true