socketconnection.java

openfire 服务器源码下载

        return idleTimeout;
    }

    /**
     * Sets the number of milliseconds a connection has to be idle to be closed. Sending
     * stanzas to the client is not considered as activity. We are only considering the
     * connection active when the client sends some data or hearbeats (i.e. whitespaces)
     * to the server.
     *
     * @param timeout the number of milliseconds a connection has to be idle to be closed.
     */
    public void setIdleTimeout(long timeout) {
        this.idleTimeout = timeout;
    }

    public int getMajorXMPPVersion() {
        return majorVersion;
    }

    public int getMinorXMPPVersion() {
        return minorVersion;
    }

    /**
     * Sets the XMPP version information. In most cases, the version should be "1.0".
     * However, older clients using the "Jabber" protocol do not set a version. In that
     * case, the version is "0.0".
     *
     * @param majorVersion the major version.
     * @param minorVersion the minor version.
     */
    public void setXMPPVersion(int majorVersion, int minorVersion) {
        this.majorVersion = majorVersion;
        this.minorVersion = minorVersion;
    }

    public String getLanguage() {
        return language;
    }

    /**
     * Sets the language code that should be used for this connection (e.g. "en").
     *
     * @param language the language code.
     */
    public void setLanaguage(String language) {
        this.language = language;
    }

    public boolean isFlashClient() {
        return flashClient;
    }

    /**
     * Sets whether the connected client is a flash client. Flash clients need to
     * receive a special character (i.e. \0) at the end of each xml packet. Flash
     * clients may send the character \0 in incoming packets and may start a
     * connection using another openning tag such as: "flash:client".
     *
     * @param flashClient true if the if the connection is a flash client.
     */
    public void setFlashClient(boolean flashClient) {
        this.flashClient = flashClient;
    }

    public SSLSession getSSLSession() {
        if (tlsStreamHandler != null) {
            return tlsStreamHandler.getSSLSession();
        }
        return null;
    }

    public PacketDeliverer getPacketDeliverer() {
        return backupDeliverer;
    }

    public void close() {
        boolean wasClosed = false;
        synchronized (this) {
            if (!isClosed()) {
                try {
                    if (session != null) {
                        session.setStatus(Session.STATUS_CLOSED);
                    }
                    boolean allowedToWrite = false;
                    try {
                        requestWriting();
                        allowedToWrite = true;
                        // Register that we started sending data on the connection
                        writeStarted();
                        writer.write("</stream:stream>");
                        if (flashClient) {
                            writer.write('\0');
                        }
                        writer.flush();
                    }
                    catch (IOException e) {
                        // Do nothing
                    }
                    finally {
                        // Register that we finished sending data on the connection
                        writeFinished();
                        if (allowedToWrite) {
                            releaseWriting();
                        }
                    }
                }
                catch (Exception e) {
                    Log.error(LocaleUtils.getLocalizedString("admin.error.close")
                            + "\n" + this.toString(), e);
                }
                closeConnection();
                wasClosed = true;
            }
        }
        if (wasClosed) {
            notifyCloseListeners();
        }
    }

    public void systemShutdown() {
        deliverRawText("<stream:error><system-shutdown " +
                "xmlns='urn:ietf:params:xml:ns:xmpp-streams'/></stream:error>");
        close();
    }

    void writeStarted() {
        writeStarted = System.currentTimeMillis();
    }

    void writeFinished() {
        writeStarted = -1;
    }

    /**
     * Returns true if the socket was closed due to a bad health. The socket is considered to
     * be in a bad state if a thread has been writing for a while and the write operation has
     * not finished in a long time or when the client has not sent a heartbeat for a long time.
     * In any of both cases the socket will be closed.
     *
     * @return true if the socket was closed due to a bad health.s
     */
    boolean checkHealth() {
        // Check that the sending operation is still active
        long writeTimestamp = writeStarted;
        if (writeTimestamp > -1 && System.currentTimeMillis() - writeTimestamp >
                JiveGlobals.getIntProperty("xmpp.session.sending-limit", 60000)) {
            // Close the socket
            if (Log.isDebugEnabled()) {
                Log.debug("Closing connection: " + this + " that started sending data at: " +
                        new Date(writeTimestamp));
            }
            forceClose();
            return true;
        }
        else {
            // Check if the connection has been idle. A connection is considered idle if the client
            // has not been receiving data for a period. Sending data to the client is not
            // considered as activity.
            if (idleTimeout > -1 && socketReader != null &&
                    System.currentTimeMillis() - socketReader.getLastActive() > idleTimeout) {
                // Close the socket
                if (Log.isDebugEnabled()) {
                    Log.debug("Closing connection that has been idle: " + this);
                }
                forceClose();
                return true;
            }
        }
        return false;
    }

    private void release() {
        writeStarted = -1;
        instances.remove(this);
    }

    /**
     * Forces the connection to be closed immediately no matter if closing the socket takes
     * a long time. This method should only be called from {@link SocketSendingTracker} when
     * sending data over the socket has taken a long time and we need to close the socket, discard
     * the connection and its session.
     */
    private void forceClose() {
        if (session != null) {
            // Set that the session is closed. This will prevent threads from trying to
            // deliver packets to this session thus preventing future locks.
            session.setStatus(Session.STATUS_CLOSED);
        }
        closeConnection();
        // Notify the close listeners so that the SessionManager can send unavailable
        // presences if required.
        notifyCloseListeners();
    }

    private void closeConnection() {
        release();
        try {
            if (tlsStreamHandler == null) {
                socket.close();
            }
            else {
                // Close the channels since we are using TLS (i.e. NIO). If the channels implement
                // the InterruptibleChannel interface then any other thread that was blocked in
                // an I/O operation will be interrupted and an exception thrown
                tlsStreamHandler.close();
            }
        }
        catch (Exception e) {
            Log.error(LocaleUtils.getLocalizedString("admin.error.close")
                    + "\n" + this.toString(), e);
        }
    }

    public void deliver(Packet packet) throws UnauthorizedException, PacketException {
        if (isClosed()) {
            backupDeliverer.deliver(packet);
        }
        else {
            boolean errorDelivering = false;
            boolean allowedToWrite = false;
            try {
                requestWriting();
                allowedToWrite = true;
                xmlSerializer.write(packet.getElement());
                if (flashClient) {
                    writer.write('\0');
                }
                xmlSerializer.flush();
            }
            catch (Exception e) {
                Log.debug("Error delivering packet" + "\n" + this.toString(), e);
                errorDelivering = true;
            }
            finally {
                if (allowedToWrite) {
                    releaseWriting();
                }
            }
            if (errorDelivering) {
                close();
                // Retry sending the packet again. Most probably if the packet is a
                // Message it will be stored offline
                backupDeliverer.deliver(packet);
            }
            else {
                session.incrementServerPacketCount();
            }
        }
    }

    public void deliverRawText(String text) {
        if (!isClosed()) {
            boolean errorDelivering = false;
            boolean allowedToWrite = false;
            try {
                requestWriting();
                allowedToWrite = true;
                // Register that we started sending data on the connection
                writeStarted();
                writer.write(text);
                if (flashClient) {
                    writer.write('\0');
                }
                writer.flush();
            }
            catch (Exception e) {
                Log.debug("Error delivering raw text" + "\n" + this.toString(), e);
                errorDelivering = true;
            }
            finally {
                // Register that we finished sending data on the connection
                writeFinished();
                if (allowedToWrite) {
                    releaseWriting();
                }
            }
            if (errorDelivering) {
                close();
            }
        }
    }

    /**
     * Notifies all close listeners that the connection has been closed.
     * Used by subclasses to properly finish closing the connection.
     */
    private void notifyCloseListeners() {
        synchronized (listeners) {
            for (ConnectionCloseListener listener : listeners.keySet()) {
                try {
                    listener.onConnectionClose(listeners.get(listener));
                }
                catch (Exception e) {
                    Log.error("Error notifying listener: " + listener, e);
                }
            }
        }
    }

    private void requestWriting() throws Exception {
        for (;;) {
            if (writing.compareAndSet(false, true)) {
                // We are now in writing mode and only we can write to the socket
                return;
            }
            else {
                // Check health of the socket
                if (checkHealth()) {
                    // Connection was closed then stop
                    throw new Exception("Probable dead connection was closed");
                }
                else {
                    Thread.sleep(1);
                }
            }
        }
    }

    private void releaseWriting() {
        writing.compareAndSet(true, false);
    }

    public String toString() {
        return super.toString() + " socket: " + socket + " session: " + session;
    }

    public void setSocketReader(SocketReader socketReader) {
        this.socketReader = socketReader;
    }
}