org.jivesoftware.smack.ChatManager Maven / Gradle / Ivy
/**
*
* Copyright 2003-2007 Jive Software.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smack;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.WeakHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.filter.AndFilter;
import org.jivesoftware.smack.filter.FromMatchesFilter;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.filter.ThreadFilter;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Message.Type;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.util.StringUtils;
/**
* The chat manager keeps track of references to all current chats. It will not hold any references
* in memory on its own so it is necessary to keep a reference to the chat object itself. To be
* made aware of new chats, register a listener by calling {@link #addChatListener(ChatManagerListener)}.
*
* @author Alexander Wenckus
*/
public class ChatManager extends Manager{
private static final Map INSTANCES = new WeakHashMap();
/**
* Sets the default behaviour for allowing 'normal' messages to be used in chats. As some clients don't set
* the message type to chat, the type normal has to be accepted to allow chats with these clients.
*/
private static boolean defaultIsNormalInclude = true;
/**
* Sets the default behaviour for how to match chats when there is NO thread id in the incoming message.
*/
private static MatchMode defaultMatchMode = MatchMode.BARE_JID;
/**
* Returns the ChatManager instance associated with a given XMPPConnection.
*
* @param connection the connection used to look for the proper ServiceDiscoveryManager.
* @return the ChatManager associated with a given XMPPConnection.
*/
public static synchronized ChatManager getInstanceFor(XMPPConnection connection) {
ChatManager manager = INSTANCES.get(connection);
if (manager == null)
manager = new ChatManager(connection);
return manager;
}
/**
* Defines the different modes under which a match will be attempted with an existing chat when
* the incoming message does not have a thread id.
*/
public enum MatchMode {
/**
* Will not attempt to match, always creates a new chat.
*/
NONE,
/**
* Will match on the JID in the from field of the message.
*/
SUPPLIED_JID,
/**
* Will attempt to match on the JID in the from field, and then attempt the base JID if no match was found.
* This is the most lenient matching.
*/
BARE_JID;
}
/**
* Determines whether incoming messages of type normal can create chats.
*/
private boolean normalIncluded = defaultIsNormalInclude;
/**
* Determines how incoming message with no thread will be matched to existing chats.
*/
private MatchMode matchMode = defaultMatchMode;
/**
* Maps thread ID to chat.
*/
private Map threadChats = Collections.synchronizedMap(new HashMap());
/**
* Maps jids to chats
*/
private Map jidChats = Collections.synchronizedMap(new HashMap());
/**
* Maps base jids to chats
*/
private Map baseJidChats = Collections.synchronizedMap(new HashMap());
private Set chatManagerListeners
= new CopyOnWriteArraySet();
private Map interceptors
= new WeakHashMap();
private ChatManager(XMPPConnection connection) {
super(connection);
PacketFilter filter = new PacketFilter() {
public boolean accept(Packet packet) {
if (!(packet instanceof Message)) {
return false;
}
Message.Type messageType = ((Message) packet).getType();
return (messageType == Type.chat) || (normalIncluded ? messageType == Type.normal : false);
}
};
// Add a listener for all message packets so that we can deliver
// messages to the best Chat instance available.
connection.addPacketListener(new PacketListener() {
public void processPacket(Packet packet) {
Message message = (Message) packet;
Chat chat;
if (message.getThread() == null) {
chat = getUserChat(message.getFrom());
}
else {
chat = getThreadChat(message.getThread());
}
if(chat == null) {
chat = createChat(message);
}
// The chat could not be created, abort here
if (chat == null)
return;
deliverMessage(chat, message);
}
}, filter);
INSTANCES.put(connection, this);
}
/**
* Determines whether incoming messages of type normal will be used for creating new chats or matching
* a message to existing ones.
*
* @return true if normal is allowed, false otherwise.
*/
public boolean isNormalIncluded() {
return normalIncluded;
}
/**
* Sets whether to allow incoming messages of type normal to be used for creating new chats or matching
* a message to an existing one.
*
* @param normalIncluded true to allow normal, false otherwise.
*/
public void setNormalIncluded(boolean normalIncluded) {
this.normalIncluded = normalIncluded;
}
/**
* Gets the current mode for matching messages with NO thread id to existing chats.
*
* @return The current mode.
*/
public MatchMode getMatchMode() {
return matchMode;
}
/**
* Sets the mode for matching messages with NO thread id to existing chats.
*
* @param matchMode The mode to set.
*/
public void setMatchMode(MatchMode matchMode) {
this.matchMode = matchMode;
}
/**
* Creates a new chat and returns it.
*
* @param userJID the user this chat is with.
* @param listener the listener which will listen for new messages from this chat.
* @return the created chat.
*/
public Chat createChat(String userJID, MessageListener listener) {
return createChat(userJID, null, listener);
}
/**
* Creates a new chat using the specified thread ID, then returns it.
*
* @param userJID the jid of the user this chat is with
* @param thread the thread of the created chat.
* @param listener the listener to add to the chat
* @return the created chat.
*/
public Chat createChat(String userJID, String thread, MessageListener listener) {
if (thread == null) {
thread = nextID();
}
Chat chat = threadChats.get(thread);
if(chat != null) {
throw new IllegalArgumentException("ThreadID is already used");
}
chat = createChat(userJID, thread, true);
chat.addMessageListener(listener);
return chat;
}
private Chat createChat(String userJID, String threadID, boolean createdLocally) {
Chat chat = new Chat(this, userJID, threadID);
threadChats.put(threadID, chat);
jidChats.put(userJID, chat);
baseJidChats.put(StringUtils.parseBareAddress(userJID), chat);
for(ChatManagerListener listener : chatManagerListeners) {
listener.chatCreated(chat, createdLocally);
}
return chat;
}
void closeChat(Chat chat) {
threadChats.remove(chat.getThreadID());
String userJID = chat.getParticipant();
jidChats.remove(userJID);
baseJidChats.remove(StringUtils.parseBareAddress(userJID));
}
/**
* Creates a new {@link Chat} based on the message. May returns null if no chat could be
* created, e.g. because the message comes without from.
*
* @param message
* @return a Chat or null if none can be created
*/
private Chat createChat(Message message) {
String userJID = message.getFrom();
// According to RFC6120 8.1.2.1 4. messages without a 'from' attribute are valid, but they
// are of no use in this case for ChatManager
if (userJID == null) {
return null;
}
String threadID = message.getThread();
if(threadID == null) {
threadID = nextID();
}
return createChat(userJID, threadID, false);
}
/**
* Try to get a matching chat for the given user JID, based on the {@link MatchMode}.
* NONE - return null
* SUPPLIED_JID - match the jid in the from field of the message exactly.
* BARE_JID - if not match for from field, try the bare jid.
*
* @param userJID jid in the from field of message.
* @return Matching chat, or null if no match found.
*/
private Chat getUserChat(String userJID) {
if (matchMode == MatchMode.NONE) {
return null;
}
// According to RFC6120 8.1.2.1 4. messages without a 'from' attribute are valid, but they
// are of no use in this case for ChatManager
if (userJID == null) {
return null;
}
Chat match = jidChats.get(userJID);
if (match == null && (matchMode == MatchMode.BARE_JID)) {
match = baseJidChats.get(StringUtils.parseBareAddress(userJID));
}
return match;
}
public Chat getThreadChat(String thread) {
return threadChats.get(thread);
}
/**
* Register a new listener with the ChatManager to recieve events related to chats.
*
* @param listener the listener.
*/
public void addChatListener(ChatManagerListener listener) {
chatManagerListeners.add(listener);
}
/**
* Removes a listener, it will no longer be notified of new events related to chats.
*
* @param listener the listener that is being removed
*/
public void removeChatListener(ChatManagerListener listener) {
chatManagerListeners.remove(listener);
}
/**
* Returns an unmodifiable collection of all chat listeners currently registered with this
* manager.
*
* @return an unmodifiable collection of all chat listeners currently registered with this
* manager.
*/
public Collection getChatListeners() {
return Collections.unmodifiableCollection(chatManagerListeners);
}
private void deliverMessage(Chat chat, Message message) {
// Here we will run any interceptors
chat.deliver(message);
}
void sendMessage(Chat chat, Message message) throws NotConnectedException {
for(Map.Entry interceptor : interceptors.entrySet()) {
PacketFilter filter = interceptor.getValue();
if(filter != null && filter.accept(message)) {
interceptor.getKey().interceptPacket(message);
}
}
// Ensure that messages being sent have a proper FROM value
if (message.getFrom() == null) {
message.setFrom(connection().getUser());
}
connection().sendPacket(message);
}
PacketCollector createPacketCollector(Chat chat) {
return connection().createPacketCollector(new AndFilter(new ThreadFilter(chat.getThreadID()),
FromMatchesFilter.create(chat.getParticipant())));
}
/**
* Adds an interceptor which intercepts any messages sent through chats.
*
* @param packetInterceptor the interceptor.
*/
public void addOutgoingMessageInterceptor(PacketInterceptor packetInterceptor) {
addOutgoingMessageInterceptor(packetInterceptor, null);
}
public void addOutgoingMessageInterceptor(PacketInterceptor packetInterceptor, PacketFilter filter) {
if (packetInterceptor != null) {
interceptors.put(packetInterceptor, filter);
}
}
/**
* Returns a unique id.
*
* @return the next id.
*/
private static String nextID() {
return UUID.randomUUID().toString();
}
public static void setDefaultMatchMode(MatchMode mode) {
defaultMatchMode = mode;
}
public static void setDefaultIsNormalIncluded(boolean allowNormal) {
defaultIsNormalInclude = allowNormal;
}
}
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