Add /dynmap purgequeue to purge tile update queue

src/main/java/org/dynmap/DynmapPlugin.java

@@ -217,7 +217,7 @@ public class DynmapPlugin extends JavaPlugin implements DynmapAPI {
         if (permissions == null)
             permissions = BukkitPermissions.create("dynmap");
         if (permissions == null)
-            permissions = new OpPermissions(new String[] { "fullrender", "cancelrender", "radiusrender", "resetstats", "reload" });
+            permissions = new OpPermissions(new String[] { "fullrender", "cancelrender", "radiusrender", "resetstats", "reload", "purgequeue" });
 
         dataDirectory = this.getDataFolder();
         
@@ -724,7 +724,8 @@ public class DynmapPlugin extends JavaPlugin implements DynmapAPI {
         "reload",
         "stats",
         "resetstats",
-        "sendtoweb" }));
+        "sendtoweb",
+        "purgequeue" }));
 
     @Override
     public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
@@ -846,6 +847,8 @@ public class DynmapPlugin extends JavaPlugin implements DynmapAPI {
                 } else {
                     sender.sendMessage("World name is required");
                 }
+            } else if (c.equals("purgequeue") && checkPlayerPermission(sender, "purgequeue")) {
+                mapManager.purgeQueue(sender);
             } else if (c.equals("reload") && checkPlayerPermission(sender, "reload")) {
                 sender.sendMessage("Reloading Dynmap...");
                 reload();

src/main/java/org/dynmap/MapManager.java

@@ -724,6 +724,18 @@ public class MapManager {
     	}
     }
     
+    void purgeQueue(CommandSender sender) {
+        if(tileQueue != null) {
+            int cnt = 0;
+            List<MapTile> popped = tileQueue.popAll();
+            if(popped != null) {
+                cnt = popped.size();
+                popped.clear();
+            }
+            sender.sendMessage("Purged " + cnt + " tiles from queue");
+        }
+    }
+    
     public void activateWorld(World w) {
         ConfigurationNode worldConfiguration = plug_in.getWorldConfiguration(w);
         if (!worldConfiguration.getBoolean("enabled", false)) {

src/main/resources/plugin.yml

@@ -24,6 +24,7 @@ commands:
            /<command> resetstats - Reset render statistics.
            /<command> resetstats world - Reset render statistics for maps on world 'world'.
            /<command> sendtoweb msg - Send message to web users
+           /<command> purgequeue - Set tile update queue to empty
             
   dmarker:
     description: Manipulate map markers
@@ -77,6 +78,7 @@ permissions:
       dynmap.stats: true
       dynmap.resetstats: true
       dynmap.sendtoweb: true
+      dynmap.purgequeue: true
       dynmap.marker.add: true
       dynmap.marker.update: true
       dynmap.marker.movehere: true
@@ -131,6 +133,9 @@ permissions:
   dynmap.sendtoweb:
     description: Allows /dynmap sendtoweb
     default: op
+  dynmap.purgequeue:
+    description: Allows /dynmap purgequeue
+    default: op
   dynmap.marker.add:
     description: Allows /dmarker add
     default: op