mirror of
https://codeberg.org/Mercury-IM/Smack
synced 2024-10-02 12:49:34 +02:00
git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@2779 b35dd754-fafc-0310-a699-88a17e54d16e
270 lines
9.1 KiB
Java
270 lines
9.1 KiB
Java
/**
|
|
* $RCSfile$
|
|
* $Revision$
|
|
* $Date$
|
|
*
|
|
* Copyright 2003-2004 Jive Software.
|
|
*
|
|
* All rights reserved. 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 org.jivesoftware.smack.packet.Message;
|
|
import org.jivesoftware.smack.util.StringUtils;
|
|
import org.jivesoftware.smack.filter.*;
|
|
|
|
import java.util.*;
|
|
import java.lang.ref.WeakReference;
|
|
|
|
/**
|
|
* A chat is a series of messages sent between two users. Each chat has a unique
|
|
* thread ID, which is used to track which messages are part of a particular
|
|
* conversation. Some messages are sent without a thread ID, and some clients
|
|
* don't send thread IDs at all. Therefore, if a message without a thread ID
|
|
* arrives it is routed to the most recently created Chat with the message
|
|
* sender.
|
|
*
|
|
* @see XMPPConnection#createChat(String)
|
|
* @author Matt Tucker
|
|
*/
|
|
public class Chat {
|
|
|
|
/**
|
|
* A prefix helps to make sure that ID's are unique across mutliple instances.
|
|
*/
|
|
private static String prefix = StringUtils.randomString(5);
|
|
|
|
/**
|
|
* Keeps track of the current increment, which is appended to the prefix to
|
|
* forum a unique ID.
|
|
*/
|
|
private static long id = 0;
|
|
|
|
/**
|
|
* Returns the next unique id. Each id made up of a short alphanumeric
|
|
* prefix along with a unique numeric value.
|
|
*
|
|
* @return the next id.
|
|
*/
|
|
private static synchronized String nextID() {
|
|
return prefix + Long.toString(id++);
|
|
}
|
|
|
|
private XMPPConnection connection;
|
|
private String threadID;
|
|
private String participant;
|
|
private PacketFilter messageFilter;
|
|
private PacketCollector messageCollector;
|
|
private Set listeners = new HashSet();
|
|
|
|
/**
|
|
* Creates a new chat with the specified user.
|
|
*
|
|
* @param connection the connection the chat will use.
|
|
* @param participant the user to chat with.
|
|
*/
|
|
public Chat(XMPPConnection connection, String participant) {
|
|
// Automatically assign the next chat ID.
|
|
this(connection, participant, nextID());
|
|
}
|
|
|
|
/**
|
|
* Creates a new chat with the specified user and thread ID.
|
|
*
|
|
* @param connection the connection the chat will use.
|
|
* @param participant the user to chat with.
|
|
* @param threadID the thread ID to use.
|
|
*/
|
|
public Chat(XMPPConnection connection, String participant, String threadID) {
|
|
this.connection = connection;
|
|
this.participant = participant;
|
|
this.threadID = threadID;
|
|
|
|
// Register with the map of chats so that messages with no thread ID
|
|
// set will be delivered to this Chat.
|
|
connection.chats.put(StringUtils.parseBareAddress(participant),
|
|
new WeakReference(this));
|
|
|
|
// Filter the messages whose thread equals Chat's id
|
|
messageFilter = new ThreadFilter(threadID);
|
|
|
|
messageCollector = connection.createPacketCollector(messageFilter);
|
|
}
|
|
|
|
/**
|
|
* Returns the thread id associated with this chat, which corresponds to the
|
|
* <tt>thread</tt> field of XMPP messages. This method may return <tt>null</tt>
|
|
* if there is no thread ID is associated with this Chat.
|
|
*
|
|
* @return the thread ID of this chat.
|
|
*/
|
|
public String getThreadID() {
|
|
return threadID;
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the user the chat is with.
|
|
*
|
|
* @return the name of the user the chat is occuring with.
|
|
*/
|
|
public String getParticipant() {
|
|
return participant;
|
|
}
|
|
|
|
/**
|
|
* Sends the specified text as a message to the other chat participant.
|
|
* This is a convenience method for:
|
|
*
|
|
* <pre>
|
|
* Message message = chat.createMessage();
|
|
* message.setBody(messageText);
|
|
* chat.sendMessage(message);
|
|
* </pre>
|
|
*
|
|
* @param text the text to send.
|
|
* @throws XMPPException if sending the message fails.
|
|
*/
|
|
public void sendMessage(String text) throws XMPPException {
|
|
Message message = createMessage();
|
|
message.setBody(text);
|
|
connection.sendPacket(message);
|
|
}
|
|
|
|
/**
|
|
* Creates a new Message to the chat participant. The message returned
|
|
* will have its thread property set with this chat ID.
|
|
*
|
|
* @return a new message addressed to the chat participant and
|
|
* using the correct thread value.
|
|
* @see #sendMessage(Message)
|
|
*/
|
|
public Message createMessage() {
|
|
Message message = new Message(participant, Message.Type.CHAT);
|
|
message.setThread(threadID);
|
|
return message;
|
|
}
|
|
|
|
/**
|
|
* Sends a message to the other chat participant. The thread ID, recipient,
|
|
* and message type of the message will automatically set to those of this chat
|
|
* in case the Message was not created using the {@link #createMessage() createMessage}
|
|
* method.
|
|
*
|
|
* @param message the message to send.
|
|
* @throws XMPPException if an error occurs sending the message.
|
|
*/
|
|
public void sendMessage(Message message) throws XMPPException {
|
|
// Force the recipient, message type, and thread ID since the user elected
|
|
// to send the message through this chat object.
|
|
message.setTo(participant);
|
|
message.setType(Message.Type.CHAT);
|
|
message.setThread(threadID);
|
|
connection.sendPacket(message);
|
|
}
|
|
|
|
/**
|
|
* Polls for and returns the next message, or <tt>null</tt> if there isn't
|
|
* a message immediately available. This method provides significantly different
|
|
* functionalty than the {@link #nextMessage()} method since it's non-blocking.
|
|
* In other words, the method call will always return immediately, whereas the
|
|
* nextMessage method will return only when a message is available (or after
|
|
* a specific timeout).
|
|
*
|
|
* @return the next message if one is immediately available and
|
|
* <tt>null</tt> otherwise.
|
|
*/
|
|
public Message pollMessage() {
|
|
return (Message)messageCollector.pollResult();
|
|
}
|
|
|
|
/**
|
|
* Returns the next available message in the chat. The method call will block
|
|
* (not return) until a message is available.
|
|
*
|
|
* @return the next message.
|
|
*/
|
|
public Message nextMessage() {
|
|
return (Message)messageCollector.nextResult();
|
|
}
|
|
|
|
/**
|
|
* Returns the next available message in the chat. The method call will block
|
|
* (not return) until a packet is available or the <tt>timeout</tt> has elapased.
|
|
* If the timeout elapses without a result, <tt>null</tt> will be returned.
|
|
*
|
|
* @param timeout the maximum amount of time to wait for the next message.
|
|
* @return the next message, or <tt>null</tt> if the timeout elapses without a
|
|
* message becoming available.
|
|
*/
|
|
public Message nextMessage(long timeout) {
|
|
return (Message)messageCollector.nextResult(timeout);
|
|
}
|
|
|
|
/**
|
|
* Adds a packet listener that will be notified of any new messages in the
|
|
* chat.
|
|
*
|
|
* @param listener a packet listener.
|
|
*/
|
|
public void addMessageListener(PacketListener listener) {
|
|
connection.addPacketListener(listener, messageFilter);
|
|
// Keep track of the listener so that we can manually deliver extra
|
|
// messages to it later if needed.
|
|
synchronized (listeners) {
|
|
listeners.add(new WeakReference(listener));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Delivers a message directly to this chat, which will add the message
|
|
* to the collector and deliver it to all listeners registered with the
|
|
* Chat. This is used by the XMPPConnection class to deliver messages
|
|
* without a thread ID.
|
|
*
|
|
* @param message the message.
|
|
*/
|
|
void deliver(Message message) {
|
|
// Because the collector and listeners are expecting a thread ID with
|
|
// a specific value, set the thread ID on the message even though it
|
|
// probably never had one.
|
|
message.setThread(threadID);
|
|
|
|
messageCollector.processPacket(message);
|
|
synchronized (listeners) {
|
|
for (Iterator i=listeners.iterator(); i.hasNext(); ) {
|
|
WeakReference listenerRef = (WeakReference)i.next();
|
|
PacketListener listener;
|
|
if ((listener = (PacketListener)listenerRef.get()) != null) {
|
|
listener.processPacket(message);
|
|
}
|
|
// If the reference was cleared, remove it from the set.
|
|
else {
|
|
i.remove();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public void finalize() throws Throwable {
|
|
super.finalize();
|
|
try {
|
|
if (messageCollector != null) {
|
|
messageCollector.cancel();
|
|
}
|
|
}
|
|
catch (Exception e) {
|
|
// Ignore.
|
|
}
|
|
}
|
|
} |