* // Create a connection to the igniterealtime.org XMPP server.
* XMPPConnection con = new XMPPConnection("igniterealtime.org");
* // Connect to the server
* con.connect();
* // Most servers require you to login before performing other tasks.
* con.login("jsmith", "mypass");
* // Start a new conversation with John Doe and send him a message.
* Chat chat = connection.getChatManager().createChat("jdoe@igniterealtime.org", new MessageListener() {
*
* public void processMessage(Chat chat, Message message) {
* // Print out any messages we get back to standard out.
* System.out.println("Received message: " + message);
* }
* });
* chat.sendMessage("Howdy!");
* // Disconnect from the server
* con.disconnect();
*
*
* XMPPConnections can be reused between connections. This means that an XMPPConnection
* may be connected, disconnected and then connected again. Listeners of the XMPPConnection
* will be retained accross connections.*
* If a connected XMPPConnection gets disconnected abruptly then it will try to reconnect * again. To stop the reconnection process, use {@link #disconnect()}. Once stopped * you can use {@link #connect()} to manually connect to the server. * * @author Matt Tucker */ public class XMPPConnection { /** * Value that indicates whether debugging is enabled. When enabled, a debug * window will apear for each new connection that will contain the following * information:*
* This is the simplest constructor for connecting to an XMPP server. Alternatively, * you can get fine-grained control over connection settings using the * {@link #XMPPConnection(ConnectionConfiguration)} constructor.*
* Note that XMPPConnection constructors do not establish a connection to the server * and you must call {@link #connect()}. * * @param serviceName the name of the XMPP server to connect to; e.g. example.com. */ public XMPPConnection(String serviceName) { // Create the configuration for this new connection ConnectionConfiguration config = new ConnectionConfiguration(serviceName); config.setCompressionEnabled(false); config.setSASLAuthenticationEnabled(true); config.setDebuggerEnabled(DEBUG_ENABLED); this.configuration = config; } /** * Creates a new XMPP connection using the specified connection configuration.*
* Manually specifying connection configuration information is suitable for * advanced users of the API. In many cases, using the * {@link #XMPPConnection(String)} constructor is a better approach.*
* Note that XMPPConnection constructors do not establish a connection to the server * and you must call {@link #connect()}. * * @param config the connection configuration. */ public XMPPConnection(ConnectionConfiguration config) { this.configuration = config; } /** * Returns the connection ID for this connection, which is the value set by the server * when opening a XMPP stream. If the server does not set a connection ID, this value * will be null. This value will be null if not connected to the server. * * @return the ID of this connection returned from the XMPP server or null if * not connected to the server. */ public String getConnectionID() { if (!isConnected()) { return null; } return connectionID; } /** * Returns the name of the service provided by the XMPP server for this connection. After * authenticating with the server the returned value may be different. * * @return the name of the service provided by the XMPP server. */ public String getServiceName() { return serviceName; } /** * Returns the host name of the server where the XMPP server is running. This would be the * IP address of the server or a name that may be resolved by a DNS server. * * @return the host name of the server where the XMPP server is running. */ public String getHost() { return host; } /** * Returns the port number of the XMPP server for this connection. The default port * for normal connections is 5222. The default port for SSL connections is 5223. * * @return the port number of the XMPP server. */ public int getPort() { return port; } /** * Returns the full XMPP address of the user that is logged in to the connection or * null if not logged in yet. An XMPP address is in the form * username@server/resource. * * @return the full XMPP address of the user logged in. */ public String getUser() { if (!isAuthenticated()) { return null; } return user; } /** * Logs in to the server using the strongest authentication mode supported by * the server, then sets presence to available. If more than five seconds * (default timeout) elapses in each step of the authentication process without * a response from the server, or if an error occurs, a XMPPException will be thrown. * * @param username the username. * @param password the password. * @throws XMPPException if an error occurs. */ public void login(String username, String password) throws XMPPException { login(username, password, "Smack"); } /** * Logs in to the server using the strongest authentication mode supported by * the server, then sets presence to available. If more than five seconds * (default timeout) elapses in each step of the authentication process without * a response from the server, or if an error occurs, a XMPPException will be thrown. * * @param username the username. * @param password the password. * @param resource the resource. * @throws XMPPException if an error occurs. * @throws IllegalStateException if not connected to the server, or already logged in * to the serrver. */ public synchronized void login(String username, String password, String resource) throws XMPPException { login(username, password, resource, true); } /** * Logs in to the server using the strongest authentication mode supported by * the server. If the server supports SASL authentication then the user will be * authenticated using SASL if not Non-SASL authentication will be tried. An available * presence may optionally be sent. If sendPresence * is false, a presence packet must be sent manually later. If more than five seconds * (default timeout) elapses in each step of the authentication process without a * response from the server, or if an error occurs, a XMPPException will be thrown.*
* Before logging in (i.e. authenticate) to the server the connection must be connected. * For compatibility and easiness of use the connection will automatically connect to the * server if not already connected. * * @param username the username. * @param password the password. * @param resource the resource. * @param sendPresence if true an available presence will be sent automatically * after login is completed. * @throws XMPPException if an error occurs. * @throws IllegalStateException if not connected to the server, or already logged in * to the serrver. */ public synchronized void login(String username, String password, String resource, boolean sendPresence) throws XMPPException { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } if (authenticated) { throw new IllegalStateException("Already logged in to server."); } // Do partial version of nameprep on the username. username = username.toLowerCase().trim(); String response; if (configuration.isSASLAuthenticationEnabled() && saslAuthentication.hasNonAnonymousAuthentication()) { // Authenticate using SASL response = saslAuthentication.authenticate(username, password, resource); } else { // Authenticate using Non-SASL response = new NonSASLAuthentication(this).authenticate(username, password, resource); } // Set the user. if (response != null) { this.user = response; // Update the serviceName with the one returned by the server this.serviceName = StringUtils.parseServer(response); } else { this.user = username + "@" + this.serviceName; if (resource != null) { this.user += "/" + resource; } } // If compression is enabled then request the server to use stream compression if (configuration.isCompressionEnabled()) { useCompression(); } // Create the roster if it is not a reconnection. if (this.roster == null) { this.roster = new Roster(this); } roster.reload(); // Set presence to online. if (sendPresence) { packetWriter.sendPacket(new Presence(Presence.Type.available)); } // Indicate that we're now authenticated. authenticated = true; anonymous = false; // Stores the autentication for future reconnection this.getConfiguration().setLoginInfo(username, password, resource, sendPresence); // If debugging is enabled, change the the debug window title to include the // name we are now logged-in as. // If DEBUG_ENABLED was set to true AFTER the connection was created the debugger // will be null if (configuration.isDebuggerEnabled() && debugger != null) { debugger.userHasLogged(user); } } /** * Logs in to the server anonymously. Very few servers are configured to support anonymous * authentication, so it's fairly likely logging in anonymously will fail. If anonymous login * does succeed, your XMPP address will likely be in the form "server/123ABC" (where "123ABC" * is a random value generated by the server). * * @throws XMPPException if an error occurs or anonymous logins are not supported by the server. * @throws IllegalStateException if not connected to the server, or already logged in * to the serrver. */ public synchronized void loginAnonymously() throws XMPPException { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } if (authenticated) { throw new IllegalStateException("Already logged in to server."); } String response; if (configuration.isSASLAuthenticationEnabled() && saslAuthentication.hasAnonymousAuthentication()) { response = saslAuthentication.authenticateAnonymously(); } else { // Authenticate using Non-SASL response = new NonSASLAuthentication(this).authenticateAnonymously(); } // Set the user value. this.user = response; // Update the serviceName with the one returned by the server this.serviceName = StringUtils.parseServer(response); // If compression is enabled then request the server to use stream compression if (configuration.isCompressionEnabled()) { useCompression(); } // Anonymous users can't have a roster. roster = null; // Set presence to online. packetWriter.sendPacket(new Presence(Presence.Type.available)); // Indicate that we're now authenticated. authenticated = true; anonymous = true; // If debugging is enabled, change the the debug window title to include the // name we are now logged-in as. // If DEBUG_ENABLED was set to true AFTER the connection was created the debugger // will be null if (configuration.isDebuggerEnabled() && debugger != null) { debugger.userHasLogged(user); } } /** * Returns the roster for the user logged into the server. If the user has not yet * logged into the server (or if the user is logged in anonymously), this method will return * null. * * @return the user's roster, or null if the user has not logged in yet. */ public Roster getRoster() { if (roster == null) { return null; } // If this is the first time the user has asked for the roster after calling // login, we want to wait for the server to send back the user's roster. This // behavior shields API users from having to worry about the fact that roster // operations are asynchronous, although they'll still have to listen for // changes to the roster. Note: because of this waiting logic, internal // Smack code should be wary about calling the getRoster method, and may need to // access the roster object directly. if (!roster.rosterInitialized) { try { synchronized (roster) { long waitTime = SmackConfiguration.getPacketReplyTimeout(); long start = System.currentTimeMillis(); while (!roster.rosterInitialized) { if (waitTime <= 0) { break; } roster.wait(waitTime); long now = System.currentTimeMillis(); waitTime -= now - start; start = now; } } } catch (InterruptedException ie) { // Ignore. } } return roster; } /** * Returns an account manager instance for this connection. * * @return an account manager for this connection. */ public synchronized AccountManager getAccountManager() { if (accountManager == null) { accountManager = new AccountManager(this); } return accountManager; } /** * Returns a chat manager instance for this connection. The ChatManager manages all incoming and * outgoing chats on the current connection. * * @return a chat manager instance for this connection. */ public synchronized ChatManager getChatManager() { if (this.chatManager == null) { this.chatManager = new ChatManager(this); } return this.chatManager; } /** * Returns true if currently connected to the XMPP server. * * @return true if connected. */ public boolean isConnected() { return connected; } /** * Returns true if the connection is a secured one, such as an SSL connection or * if TLS was negotiated successfully. * * @return true if a secure connection to the server. */ public boolean isSecureConnection() { return isUsingTLS(); } /** * Returns true if currently authenticated by successfully calling the login method. * * @return true if authenticated. */ public boolean isAuthenticated() { return authenticated; } /** * Returns true if currently authenticated anonymously. * * @return true if authenticated anonymously. */ public boolean isAnonymous() { return anonymous; } /** * Closes the connection by setting presence to unavailable then closing the stream to * the XMPP server. The shutdown logic will be used during a planned disconnection or when * dealing with an unexpected disconnection. Unlike {@link #disconnect()} the connection's * packet reader, packet writer, and {@link Roster} will not be removed; thus * connection's state is kept. * * @param unavailablePresence the presence packet to send during shutdown. */ protected void shutdown(Presence unavailablePresence) { // Set presence to offline. packetWriter.sendPacket(unavailablePresence); this.setWasAuthenticated(authenticated); authenticated = false; connected = false; packetReader.shutdown(); packetWriter.shutdown(); // Wait 150 ms for processes to clean-up, then shutdown. try { Thread.sleep(150); } catch (Exception e) { // Ignore. } // Close down the readers and writers. if (reader != null) { try { reader.close(); } catch (Throwable ignore) { /* ignore */ } reader = null; } if (writer != null) { try { writer.close(); } catch (Throwable ignore) { /* ignore */ } writer = null; } try { socket.close(); } catch (Exception e) { // Ignore. } saslAuthentication.init(); } /** * Closes the connection by setting presence to unavailable then closing the stream to * the XMPP server. The XMPPConnection can still be used for connecting to the server * again.*
* This method cleans up all resources used by the connection. Therefore, the roster, * listeners and other stateful objects cannot be re-used by simply calling connect() * on this connection again. This is unlike the behavior during unexpected disconnects * (and subsequent connections). In that case, all state is preserved to allow for * more seamless error recovery. */ public void disconnect() { disconnect(new Presence(Presence.Type.unavailable)); } /** * Closes the connection. A custom unavailable presence is sent to the server, followed * by closing the stream. The XMPPConnection can still be used for connecting to the server * again. A custom unavilable presence is useful for communicating offline presence * information such as "On vacation". Typically, just the status text of the presence * packet is set with online information, but most XMPP servers will deliver the full * presence packet with whatever data is set.*
* This method cleans up all resources used by the connection. Therefore, the roster, * listeners and other stateful objects cannot be re-used by simply calling connect() * on this connection again. This is unlike the behavior during unexpected disconnects * (and subsequent connections). In that case, all state is preserved to allow for * more seamless error recovery. * * @param unavailablePresence the presence packet to send during shutdown. */ public void disconnect(Presence unavailablePresence) { // If not connected, ignore this request. if (packetReader == null || packetWriter == null) { return; } shutdown(unavailablePresence); if (roster != null) { roster.cleanup(); roster = null; } wasAuthenticated = false; packetWriter.cleanup(); packetWriter = null; packetReader.cleanup(); packetReader = null; } /** * Sends the specified packet to the server. * * @param packet the packet to send. */ public void sendPacket(Packet packet) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } if (packet == null) { throw new NullPointerException("Packet is null."); } packetWriter.sendPacket(packet); } /** * Registers a packet listener with this connection. A packet filter determines * which packets will be delivered to the listener. If the same packet listener * is added again with a different filter, only the new filter will be used. * * @param packetListener the packet listener to notify of new packets. * @param packetFilter the packet filter to use. */ public void addPacketListener(PacketListener packetListener, PacketFilter packetFilter) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } packetReader.addPacketListener(packetListener, packetFilter); } /** * Removes a packet listener from this connection. * * @param packetListener the packet listener to remove. */ public void removePacketListener(PacketListener packetListener) { packetReader.removePacketListener(packetListener); } /** * Registers a packet listener with this connection. The listener will be * notified of every packet that this connection sends. A packet filter determines * which packets will be delivered to the listener. Note that the thread * that writes packets will be used to invoke the listeners. Therefore, each * packet listener should complete all operations quickly or use a different * thread for processing. * * @param packetListener the packet listener to notify of sent packets. * @param packetFilter the packet filter to use. */ public void addPacketWriterListener(PacketListener packetListener, PacketFilter packetFilter) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } packetWriter.addPacketListener(packetListener, packetFilter); } /** * Removes a packet listener from this connection. * * @param packetListener the packet listener to remove. */ public void removePacketWriterListener(PacketListener packetListener) { packetWriter.removePacketListener(packetListener); } /** * Registers a packet interceptor with this connection. The interceptor will be * invoked every time a packet is about to be sent by this connection. Interceptors * may modify the packet to be sent. A packet filter determines which packets * will be delivered to the interceptor. * * @param packetInterceptor the packet interceptor to notify of packets about to be sent. * @param packetFilter the packet filter to use. */ public void addPacketWriterInterceptor(PacketInterceptor packetInterceptor, PacketFilter packetFilter) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } packetWriter.addPacketInterceptor(packetInterceptor, packetFilter); } /** * Removes a packet interceptor. * * @param packetInterceptor the packet interceptor to remove. */ public void removePacketWriterInterceptor(PacketInterceptor packetInterceptor) { packetWriter.removePacketInterceptor(packetInterceptor); } /** * Creates a new packet collector for this connection. A packet filter determines * which packets will be accumulated by the collector. * * @param packetFilter the packet filter to use. * @return a new packet collector. */ public PacketCollector createPacketCollector(PacketFilter packetFilter) { return packetReader.createPacketCollector(packetFilter); } /** * Adds a connection listener to this connection that will be notified when * the connection closes or fails. The connection needs to already be connected * or otherwise an IllegalStateException will be thrown. * * @param connectionListener a connection listener. */ public void addConnectionListener(ConnectionListener connectionListener) { if (!isConnected()) { throw new IllegalStateException("Not connected to server."); } if (connectionListener == null) { return; } if (!packetReader.connectionListeners.contains(connectionListener)) { packetReader.connectionListeners.add(connectionListener); } } /** * Removes a connection listener from this connection. * * @param connectionListener a connection listener. */ public void removeConnectionListener(ConnectionListener connectionListener) { packetReader.connectionListeners.remove(connectionListener); } /** * Adds a new listener that will be notified when new XMPPConnections are created. Note * that newly created connections will not be actually connected to the server. * * @param connectionCreationListener a listener interested on new connections. */ public static void addConnectionCreationListener( ConnectionCreationListener connectionCreationListener) { connectionEstablishedListeners.add(connectionCreationListener); } /** * Removes a listener that was interested in connection creation events. * * @param connectionCreationListener a listener interested on new connections. */ public static void removeConnectionCreationListener( ConnectionCreationListener connectionCreationListener) { connectionEstablishedListeners.remove(connectionCreationListener); } private void connectUsingConfiguration(ConnectionConfiguration config) throws XMPPException { this.host = config.getHost(); this.port = config.getPort(); try { if (config.getSocketFactory() == null) { this.socket = new Socket(host, port); } else { this.socket = config.getSocketFactory().createSocket(host, port); } } catch (UnknownHostException uhe) { String errorMessage = "Could not connect to " + host + ":" + port + "."; throw new XMPPException(errorMessage, new XMPPError( XMPPError.Condition.remote_server_timeout, errorMessage), uhe); } catch (IOException ioe) { String errorMessage = "XMPPError connecting to " + host + ":" + port + "."; throw new XMPPException(errorMessage, new XMPPError( XMPPError.Condition.remote_server_error, errorMessage), ioe); } this.serviceName = config.getServiceName(); initConnection(); } /** * Initializes the connection by creating a packet reader and writer and opening a * XMPP stream to the server. * * @throws XMPPException if establishing a connection to the server fails. */ private void initConnection() throws XMPPException { boolean isFirstInitialization = packetReader == null || packetWriter == null; if (!isFirstInitialization) { usingCompression = false; } // Set the reader and writer instance variables initReaderAndWriter(); try { if (isFirstInitialization) { packetWriter = new PacketWriter(this); packetReader = new PacketReader(this); // If debugging is enabled, we should start the thread that will listen for // all packets and then log them. if (configuration.isDebuggerEnabled()) { packetReader.addPacketListener(debugger.getReaderListener(), null); if (debugger.getWriterListener() != null) { packetWriter.addPacketListener(debugger.getWriterListener(), null); } } } else { packetWriter.init(); packetReader.init(); } // Start the packet writer. This will open a XMPP stream to the server packetWriter.startup(); // Start the packet reader. The startup() method will block until we // get an opening stream packet back from server. packetReader.startup(); // Make note of the fact that we're now connected. connected = true; // Start keep alive process (after TLS was negotiated - if available) packetWriter.startKeepAliveProcess(); if (isFirstInitialization) { // Notify listeners that a new connection has been established for (ConnectionCreationListener listener : connectionEstablishedListeners) { listener.connectionCreated(this); } } else { packetReader.notifyReconnection(); } } catch (XMPPException ex) { // An exception occurred in setting up the connection. Make sure we shut down the // readers and writers and close the socket. if (packetWriter != null) { try { packetWriter.shutdown(); } catch (Throwable ignore) { /* ignore */ } packetWriter = null; } if (packetReader != null) { try { packetReader.shutdown(); } catch (Throwable ignore) { /* ignore */ } packetReader = null; } if (reader != null) { try { reader.close(); } catch (Throwable ignore) { /* ignore */ } reader = null; } if (writer != null) { try { writer.close(); } catch (Throwable ignore) { /* ignore */} writer = null; } if (socket != null) { try { socket.close(); } catch (Exception e) { /* ignore */ } socket = null; } this.setWasAuthenticated(authenticated); authenticated = false; connected = false; throw ex; // Everything stoppped. Now throw the exception. } } private void initReaderAndWriter() throws XMPPException { try { if (!usingCompression) { reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8")); writer = new BufferedWriter( new OutputStreamWriter(socket.getOutputStream(), "UTF-8")); } else { try { Class zoClass = Class.forName("com.jcraft.jzlib.ZOutputStream"); Constructor constructor = zoClass.getConstructor(OutputStream.class, Integer.TYPE); Object out = constructor.newInstance(socket.getOutputStream(), 9); Method method = zoClass.getMethod("setFlushMode", Integer.TYPE); method.invoke(out, 2); writer = new BufferedWriter(new OutputStreamWriter((OutputStream) out, "UTF-8")); Class ziClass = Class.forName("com.jcraft.jzlib.ZInputStream"); constructor = ziClass.getConstructor(InputStream.class); Object in = constructor.newInstance(socket.getInputStream()); method = ziClass.getMethod("setFlushMode", Integer.TYPE); method.invoke(in, 2); reader = new BufferedReader(new InputStreamReader((InputStream) in, "UTF-8")); } catch (Exception e) { e.printStackTrace(); reader = new BufferedReader( new InputStreamReader(socket.getInputStream(), "UTF-8")); writer = new BufferedWriter( new OutputStreamWriter(socket.getOutputStream(), "UTF-8")); } } } catch (IOException ioe) { throw new XMPPException( "XMPPError establishing connection with server.", new XMPPError(XMPPError.Condition.remote_server_error, "XMPPError establishing connection with server."), ioe); } // If debugging is enabled, we open a window and write out all network traffic. if (configuration.isDebuggerEnabled()) { if (debugger == null) { // Detect the debugger class to use. String className = null; // Use try block since we may not have permission to get a system // property (for example, when an applet). try { className = System.getProperty("smack.debuggerClass"); } catch (Throwable t) { // Ignore. } Class debuggerClass = null; if (className != null) { try { debuggerClass = Class.forName(className); } catch (Exception e) { e.printStackTrace(); } } if (debuggerClass == null) { try { debuggerClass = Class.forName("org.jivesoftware.smackx.debugger.EnhancedDebugger"); } catch (Exception ex) { try { debuggerClass = Class.forName("org.jivesoftware.smack.debugger.LiteDebugger"); } catch (Exception ex2) { ex2.printStackTrace(); } } } // Create a new debugger instance. If an exception occurs then disable the debugging // option try { Constructor constructor = debuggerClass .getConstructor(XMPPConnection.class, Writer.class, Reader.class); debugger = (SmackDebugger) constructor.newInstance(this, writer, reader); reader = debugger.getReader(); writer = debugger.getWriter(); } catch (Exception e) { e.printStackTrace(); DEBUG_ENABLED = false; } } else { // Obtain new reader and writer from the existing debugger reader = debugger.newConnectionReader(reader); writer = debugger.newConnectionWriter(writer); } } } /*********************************************** * TLS code below **********************************************/ /** * Returns true if the connection to the server has successfully negotiated TLS. Once TLS * has been negotiatied the connection has been secured. * * @return true if the connection to the server has successfully negotiated TLS. */ public boolean isUsingTLS() { return usingTLS; } /** * Returns the SASLAuthentication manager that is responsible for authenticating with * the server. * * @return the SASLAuthentication manager that is responsible for authenticating with * the server. */ public SASLAuthentication getSASLAuthentication() { return saslAuthentication; } /** * Returns the configuration used to connect to the server. * * @return the configuration used to connect to the server. */ protected ConnectionConfiguration getConfiguration() { return configuration; } /** * Notification message saying that the server supports TLS so confirm the server that we * want to secure the connection. * * @param required true when the server indicates that TLS is required. */ void startTLSReceived(boolean required) { if (required && configuration.getSecurityMode() == ConnectionConfiguration.SecurityMode.disabled) { packetReader.notifyConnectionError(new IllegalStateException( "TLS required by server but not allowed by connection configuration")); return; } if (configuration.getSecurityMode() == ConnectionConfiguration.SecurityMode.disabled) { // Do not secure the connection using TLS since TLS was disabled return; } try { writer.write("*
* Note: to use stream compression the smackx.jar file has to be present in the classpath. * * @return true if network traffic is being compressed. */ public boolean isUsingCompression() { return usingCompression; } /** * Starts using stream compression that will compress network traffic. Traffic can be * reduced up to 90%. Therefore, stream compression is ideal when using a slow speed network * connection. However, the server and the client will need to use more CPU time in order to * un/compress network data so under high load the server performance might be affected.*
* Stream compression has to have been previously offered by the server. Currently only the * zlib method is supported by the client. Stream compression negotiation has to be done * before authentication took place.*
* Note: to use stream compression the smackx.jar file has to be present in the classpath. * * @return true if stream compression negotiation was successful. */ private boolean useCompression() { // If stream compression was offered by the server and we want to use // compression then send compression request to the server if (authenticated) { throw new IllegalStateException("Compression should be negotiated before authentication."); } try { Class.forName("com.jcraft.jzlib.ZOutputStream"); } catch (ClassNotFoundException e) { throw new IllegalStateException("Cannot use compression. Add smackx.jar to the classpath"); } if (hasAvailableCompressionMethod("zlib")) { requestStreamCompression(); // Wait until compression is being used or a timeout happened synchronized (this) { try { this.wait(SmackConfiguration.getPacketReplyTimeout() * 5); } catch (InterruptedException e) { // Ignore. } } return usingCompression; } return false; } /** * Request the server that we want to start using stream compression. When using TLS * then negotiation of stream compression can only happen after TLS was negotiated. If TLS * compression is being used the stream compression should not be used. */ private void requestStreamCompression() { try { writer.write("*
* Listeners will be preserved from a previous connection if the reconnection * occurs after an abrupt termination. * * @throws XMPPException if an error occurs while trying to establish the connection. * Two possible errors can occur which will be wrapped by an XMPPException -- * UnknownHostException (XMPP error code 504), and IOException (XMPP error code * 502). The error codes and wrapped exceptions can be used to present more * appropiate error messages to end-users. */ public void connect() throws XMPPException { // Stablishes the connection, readers and writers connectUsingConfiguration(configuration); // Automatically makes the login if the user was previouslly connected successfully // to the server and the connection was terminated abruptly if (connected && wasAuthenticated) { // Make the login try { if (isAnonymous()) { // Make the anonymous login loginAnonymously(); } else { login(getConfiguration().getUsername(), getConfiguration().getPassword(), getConfiguration().getResource(), getConfiguration().isSendPresence()); } } catch (XMPPException e) { e.printStackTrace(); } } } /** * Sets whether the connection has already logged in the server. * * @param wasAuthenticated true if the connection has already been authenticated. */ private void setWasAuthenticated(boolean wasAuthenticated) { if (!this.wasAuthenticated) { this.wasAuthenticated = wasAuthenticated; } } }