add LocalMUCRoomManager to encapsule the simple management for LocalMUCRoom

src/java/org/jivesoftware/openfire/muc/spi/LocalMUCRoomManager.java

+package org.jivesoftware.openfire.muc.spi;
+
+import java.util.Collection;
+import java.util.Date;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.jivesoftware.openfire.event.GroupEventDispatcher;
+import org.jivesoftware.openfire.muc.MUCRoom;
+
+/**
+ * this class supports the simple LocalMUCRoom management including remove,add and query.
+ * @author wuchang
+ * @email 583424568@qq.com
+ * 2016-1-14
+ */
+public class LocalMUCRoomManager {
+    private Map<String, LocalMUCRoom> rooms = new ConcurrentHashMap<>();
+     
+    public int getNumberChatRooms(){
+    	return rooms.size();
+    }
+    public void addRoom(String roomname,LocalMUCRoom room){
+    	rooms.put(roomname, room);
+    }
+    
+    public Collection<LocalMUCRoom> getRooms(){
+    	return rooms.values();
+    }
+    
+    public LocalMUCRoom getRoom(String roomname){
+    	return rooms.get(roomname);
+    }
+    
+    public MUCRoom removeRoom(String roomname){
+    	//memory leak will happen if we forget remove it from GroupEventDispatcher
+    	if(rooms.containsKey(roomname))
+    		GroupEventDispatcher.removeListener((LocalMUCRoom) rooms.get(roomname));
+        return	rooms.remove(roomname);
+    }
+    
+    public void cleanupRooms(Date cleanUpDate) {
+        for (MUCRoom room : getRooms()) {
+            if (room.getEmptyDate() != null && room.getEmptyDate().before(cleanUpDate)) {
+                removeRoom(room.getName());
+            }
+        }
+    }
+}

src/java/org/jivesoftware/openfire/muc/spi/MultiUserChatServiceImpl.java

@@ -135,9 +135,9 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
     private String chatDescription = null;
 
     /**
-     * chatrooms managed by this manager, table: key room name (String); value ChatRoom
+     * LocalMUCRoom chat manager which supports simple chatroom management
      */
-    private Map<String, LocalMUCRoom> rooms = new ConcurrentHashMap<>();
+    private LocalMUCRoomManager localMUCRoomManager = new LocalMUCRoomManager();
 
     /**
      * Chat users managed by this manager. This includes only users connected to this JVM.
@@ -510,7 +510,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
                 return;
             }
             try {
-                cleanupRooms();
+            	localMUCRoomManager.cleanupRooms(getCleanupDate());
             }
             catch (Throwable e) {
                 Log.error(LocaleUtils.getLocalizedString("admin.error"), e);
@@ -518,13 +518,6 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
         }
     }
  
-    private void cleanupRooms() {
-        for (MUCRoom room : rooms.values()) {
-            if (room.getEmptyDate() != null && room.getEmptyDate().before(getCleanupDate())) {
-                removeChatRoom(room.getName());
-            }
-        }
-    }
 
     @Override
     public MUCRoom getChatRoom(String roomName, JID userjid) throws NotAllowedException {
@@ -532,7 +525,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
         boolean loaded = false;
         boolean created = false;
         synchronized (roomName.intern()) {
-            room = rooms.get(roomName);
+            room = localMUCRoomManager.getRoom(roomName);
             if (room == null) {
                 room = new LocalMUCRoom(this, roomName, router);
                 // If the room is persistent load the configuration values from the DB
@@ -576,7 +569,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
                         created = true;
                     }
                 }
-                rooms.put(roomName, room);
+                localMUCRoomManager.addRoom(roomName, room);
             }
         }
         if (created) {
@@ -598,11 +591,11 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
     @Override
     public MUCRoom getChatRoom(String roomName) {
         boolean loaded = false;
-        LocalMUCRoom room = rooms.get(roomName);
+        LocalMUCRoom room = localMUCRoomManager.getRoom(roomName);
         if (room == null) {
             // Check if the room exists in the databclase and was not present in memory
             synchronized (roomName.intern()) {
-                room = rooms.get(roomName);
+            	room = localMUCRoomManager.getRoom(roomName);
                 if (room == null) {
                     room = new LocalMUCRoom(this, roomName, router);
                     // If the room is persistent load the configuration values from the DB
@@ -612,7 +605,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
                         // room may be an old room that was not present in memory)
                         MUCPersistenceManager.loadFromDB(room);
                         loaded = true;
-                        rooms.put(roomName, room);
+                        localMUCRoomManager.addRoom(roomName,room);
                     }
                     catch (IllegalArgumentException e) {
                         // The room does not exist so do nothing
@@ -630,17 +623,17 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
 
     @Override
     public void refreshChatRoom(String roomName) {
-        rooms.remove(roomName);
+    	localMUCRoomManager.removeRoom(roomName);
         getChatRoom(roomName);
     }
 
     public LocalMUCRoom getLocalChatRoom(String roomName) {
-        return rooms.get(roomName);
+        return localMUCRoomManager.getRoom(roomName);
     }
 
     @Override
     public List<MUCRoom> getChatRooms() {
-        return new ArrayList<MUCRoom>(rooms.values());
+        return new ArrayList<MUCRoom>(localMUCRoomManager.getRooms());
     }
 
     @Override
@@ -672,11 +665,11 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
      */
     @Override
     public void chatRoomAdded(LocalMUCRoom room) {
-        rooms.put(room.getName(), room);
+    	localMUCRoomManager.addRoom(room.getName(), room) ;
     }
 
     private void removeChatRoom(String roomName, boolean notify) {
-        MUCRoom room = rooms.remove(roomName);
+        MUCRoom room = localMUCRoomManager.removeRoom(roomName);
 		Log.info("removing chat room:" + roomName + "|" + room.getClass().getName());
 		if (room instanceof LocalMUCRoom)
 			GroupEventDispatcher.removeListener((LocalMUCRoom) room);
@@ -740,7 +733,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
             if (user == null) {
                 if (roomName != null) {
                     // Check if the JID belong to a user hosted in another cluster node
-                    LocalMUCRoom localMUCRoom = rooms.get(roomName);
+                    LocalMUCRoom localMUCRoom = localMUCRoomManager.getRoom(roomName);
                     if (localMUCRoom != null) {
                         MUCRole occupant = localMUCRoom.getOccupantByFullJID(userjid);
                         if (occupant != null && !occupant.isLocal()) {
@@ -758,7 +751,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
     @Override
     public Collection<MUCRole> getMUCRoles(JID user) {
         List<MUCRole> userRoles = new ArrayList<>();
-        for (LocalMUCRoom room : rooms.values()) {
+        for (LocalMUCRoom room : localMUCRoomManager.getRooms()) {
         	MUCRole role = room.getOccupantByFullJID(user);
             if (role != null) {
                 userRoles.add(role);
@@ -1153,7 +1146,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
         Log.info(LocaleUtils.getLocalizedString("startup.starting.muc", params));
         // Load all the persistent rooms to memory
         for (LocalMUCRoom room : MUCPersistenceManager.loadRoomsFromDB(this, this.getCleanupDate(), router)) {
-            rooms.put(room.getName().toLowerCase(), room);
+        	localMUCRoomManager.addRoom(room.getName().toLowerCase(),room);
         }
     }
 
@@ -1205,7 +1198,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
      */
     @Override
     public int getNumberChatRooms() {
-        return rooms.size();
+    	 return localMUCRoomManager.getNumberChatRooms();
     }
 
     /**
@@ -1244,7 +1237,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
     @Override
     public int getNumberRoomOccupants() {
         int total = 0;
-        for (MUCRoom room : rooms.values()) {
+        for (MUCRoom room : localMUCRoomManager.getRooms()) {
             total = total + room.getOccupantsCount();
         }
         return total;
@@ -1562,7 +1555,7 @@ public class MultiUserChatServiceImpl implements Component, MultiUserChatService
 		if (name == null && node == null)
 		{
 			// Answer all the public rooms as items
-			for (MUCRoom room : rooms.values())
+			for (MUCRoom room : localMUCRoomManager.getRooms())
 			{
 				if (canDiscoverRoom(room, senderJID))
 				{