改造MUC实现Openfire群

我的Openfire群实现思路：

1、群和群成员，要保存到表中。

2、拉取群列表和群成员列表，均从DB中查询返回。

3、抛弃老外的“进房间，要发Presence ”。只要此人一上线，就模似一个Presence进行joinRoom，进入他的各群房间。

     多了解LocalMUCRoom 类中：public LocalMUCRole joinRoom(String nickname, String password, HistoryRequest historyRequest, LocalMUCUser user, Presence presence)

    我的模似代码如下：

 1 /**
 2      * 模似用户进群（含呢称、含Precense、初始化角色LocalMUCRole）
 3      * @param roomId
 4      * @param packet
 5      * @return
 6      */
 7     public MUCRole getRolesByRoomId(long roomId, Packet packet)
 8     {
 9         MUCRole role = null;
10         try {
11             // Get or create the room  获取该群
12             MUCRoom room = server.getChatRoom(roomId, packet.getFrom());
13             
14             //从数据库中查询他的姓名作为昵称（得自己实现）
15             String nickname = new MUCRoomServiceDao().getUserNickname(packet.getFrom().getNode());
16             if(nickname == null)
17             {
18                 if(packet.getFrom().getResource() != null)
19                 {
20                     nickname = packet.getFrom().getResource();
21                 }
22                 else 
23                 {
24                     nickname = packet.getFrom().getNode();
25                 }
26             }
27             
28             HistoryRequest historyRequest = null;
29             String password = null;
30             
31             //构建成员进入群的Presence
32             Presence presence = new Presence();
33             presence.setTo(room.getJID().toBareJID() + "/" + nickname);    
34             presence.setFrom(packet.getFrom());
35             PacketExtension extension = new PacketExtension("x", http://jabber.org/protocol/muc);
36             presence.addExtension(extension);
37             
38             // The user joins the room 用户进入群
39             role = room.joinRoom(nickname,
40                     password,
41                     historyRequest,
42                     this,
43                     presence);
44             
45             // If the client that created the room is non-MUC compliant then
46             // unlock the room thus creating an "instant" room
47             //if (mucInfo == null && room.isLocked() && !room.isManuallyLocked()) {
48             if (room.isLocked() && !room.isManuallyLocked()) {
49                 room.unlock(role);
50                 //server.chatRoomAdded((LocalMUCRoom)room);
51             }
52             
53             addRole(roomId, (LocalMUCRole)role);//添加“用户在某个群中的角色”
54             
55         }
56         catch (UnauthorizedException e) {
57             sendErrorPacket(packet, PacketError.Condition.not_authorized);
58         }
59         catch (ServiceUnavailableException e) {
60             sendErrorPacket(packet, PacketError.Condition.service_unavailable);
61         }
62         catch (UserAlreadyExistsException e) {
63             sendErrorPacket(packet, PacketError.Condition.conflict);
64         }
65         catch (RoomLockedException e) {
66             sendErrorPacket(packet, PacketError.Condition.recipient_unavailable);
67         }
68         catch (ForbiddenException e) {
69             sendErrorPacket(packet, PacketError.Condition.forbidden);
70         }
71         catch (RegistrationRequiredException e) {
72             sendErrorPacket(packet, PacketError.Condition.registration_required);
73         }
74         catch (ConflictException e) {
75             sendErrorPacket(packet, PacketError.Condition.conflict);
76         }
77         catch (NotAcceptableException e) {
78             sendErrorPacket(packet, PacketError.Condition.not_acceptable);
79         }
80         catch (NotAllowedException e) {
81             sendErrorPacket(packet, PacketError.Condition.not_allowed);
82         }        
83         return role;
84     }

 4、抛弃老外的“以昵称为Key 缓存群成员”。改为以帐号为Key。

     多了解 LocalMUCRoom 类中：private Map<String,MUCRole> occupants = new ConcurrentHashMap<String, MUCRole>();

     在joinRoom办法中：    

 //以JID作为缓存的key
2         JID userJid = user.getAddress();
3         if (userJid != null) {
4             occupants.put(userJid.toBareJID(), joinRole);
5         }

 5、详细了解 LocalMUCRoom、LocalMUCUser、LocalMUCRole这三个类，各类中的数据成员、方法。