openfire 开发时输出xml到控制台

openfire以前的版本，可以在调试时，直接把xml输出到控制台。但现在不能输出了。我跟了下源码。调试输出是由插件 Debugger Plugin 实现的。

位于源码目录：srcpluginsxmldebugger

public void initializePlugin(PluginManager manager,File pluginDirectory) {
        // Add filter to filter chain builder
        ConnectionManagerImpl connManager = (ConnectionManagerImpl) XMPPServer.getInstance().getConnectionManager();
        defaultPortFilter = new RawPrintFilter("C2S");
        SocketAcceptor socketAcceptor = connManager.getSocketAcceptor();
        if (socketAcceptor != null) {
            socketAcceptor.getFilterChain().addBefore("xmpp","rawDebugger",defaultPortFilter);
        }
        oldPortFilter = new RawPrintFilter("SSL");
        SocketAcceptor sslAcceptor = connManager.getSSLSocketAcceptor();
        if (sslAcceptor != null) {
            sslAcceptor.getFilterChain().addBefore("xmpp",oldPortFilter);
        }

        componentPortFilter = new RawPrintFilter("ExComp");
        SocketAcceptor componentAcceptor = connManager.getComponentAcceptor();
        if (componentAcceptor != null) {
            componentAcceptor.getFilterChain().addBefore("xmpp",componentPortFilter);
        }

        multiplexerPortFilter = new RawPrintFilter("CM");
        SocketAcceptor multiplexerAcceptor = connManager.getMultiplexerSocketAcceptor();
        if (multiplexerAcceptor != null) {
            multiplexerAcceptor.getFilterChain().addBefore("xmpp",multiplexerPortFilter);
        }

        interpretedPrinter = new InterpretedXMLPrinter();
        if (JiveGlobals.getBooleanProperty("plugin.debugger.interpretedAllowed")) {
            // Add the packet interceptor that prints interpreted XML
            InterceptorManager.getInstance().addInterceptor(interpretedPrinter);
        }
        // Listen to property events
        PropertyEventDispatcher.addListener(this);
    }

从上面已经允许C2S打印日志输出。但是实际上openfire并没有打印C2S日志。再看RawPrintFilter实现：

/** * MINA filter that prints to the stdout received XML stanzas before they are actually parsed and * also prints XML stanzas as sent to the XMPP entities. Moreover,it also prints information when * a session is closed. * * @author Gaston Dombiak */
public class RawPrintFilter extends IoFilterAdapter {
    private boolean enabled = true;
    private String prefix;
    private Collection<IoSession> sessions = new ConcurrentLinkedQueue<IoSession>();

    public RawPrintFilter(String prefix) {
        this.prefix = prefix;
        this.enabled = JiveGlobals.getBooleanProperty("plugin.xmldebugger." + prefix.toLowerCase(),true);
    }

    @Override
    public void messageReceived(NextFilter nextFilter,IoSession session,Object message) throws Exception {
        // Decode the bytebuffer and print it to the stdout
        if (enabled && message instanceof ByteBuffer) {
            ByteBuffer byteBuffer = (ByteBuffer) message;
            // Keep current position in the buffer
            int currentPos = byteBuffer.position();
            // Decode buffer
            Charset encoder = Charset.forName("UTF-8");
            CharBuffer charBuffer = encoder.decode(byteBuffer.asReadOnlyBuffer());
            // Print buffer content
            System.out.println(prefix + " - RECV (" + session.hashCode() + "): " + charBuffer);
            // Reset to old position in the buffer
            byteBuffer.position(currentPos);
        }
        // Pass the message to the next filter
        super.messageReceived(nextFilter,session,message);
    }

    @Override
    public void messageSent(NextFilter nextFilter,WriteRequest writeRequest) throws Exception {
        if (enabled && writeRequest.getMessage() instanceof ByteBuffer) {
            System.out.println(prefix + " - SENT (" + session.hashCode() + "): " +
                    Charset.forName("UTF-8").decode(((ByteBuffer) writeRequest.getMessage()).asReadOnlyBuffer()));
        }

        // Pass the message to the next filter
        super.messageSent(nextFilter,writeRequest);
    }

    public boolean isEnabled() {
        return enabled;
    }

    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
        JiveGlobals.setProperty("plugin.xmldebugger." + prefix.toLowerCase(),Boolean.toString(enabled)); 
    }

    public void shutdown() {
        // Remove this filter from sessions that are using it
        for (IoSession session : sessions) {
            session.getFilterChain().remove("rawDebugger");
        }
        sessions = null;
    }

    @Override
    public void sessionCreated(NextFilter nextFilter,IoSession session) throws Exception {
        // Keep track of sessions using this filter
        sessions.add(session);

        super.sessionCreated(nextFilter,session);
    }

    @Override
    public void sessionClosed(NextFilter nextFilter,IoSession session) throws Exception {
        // Update list of sessions using this filter
        sessions.remove(session);
        if (enabled) {
            // Print that a session was closed
            System.out.println("CLOSED (" + session.hashCode() + ") ");
        }

        super.sessionClosed(nextFilter,session);
    }
}

在构造函数中，此类定义了一个开关enable。所以要打开c2s，需要设置 plugin.xmldebugger.c2s为 true。 如果要打开ssl打印日志。需要设置plugin.xmldebugger.ssl为true。等等。 如果要打开拦截器日志，则需要设置 plugin.debugger.interpretedAllowed 为 true 。 所以，登录管理端，把它加到服务器-》服务器管理-》系统属性中。xml 可以输出到控制端了。