abstractproxyiohandler.java

mina是以Java实现的一个开源的网络程序框架

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 *  Licensed to the Apache Software Foundation (ASF) under one
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 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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 *    http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.mina.proxy;

import org.apache.mina.core.service.IoHandler;
import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.proxy.handlers.socks.SocksProxyRequest;
import org.apache.mina.proxy.session.ProxyIoSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * AbstractProxyIoHandler.java - {@link IoHandler} that intercepts events until handshake is complete.
 * 
 * @author The Apache MINA Project ([e-mail])
 * @version $Rev: 685703 $, $Date: 2008-08-14 00:14:47 +0200 (Thu, 14 Aug 2008) $
 * @since MINA 2.0.0-M3
 */
public abstract class AbstractProxyIoHandler extends IoHandlerAdapter {
    private final static Logger logger = LoggerFactory
            .getLogger(AbstractProxyIoHandler.class);

    /**
     * Method called only when handshake has completed.
     */
    public abstract void proxySessionOpened(IoSession session) throws Exception;

    /**
     * Hooked session opened event.
     */
    @Override
    public final void sessionOpened(IoSession session) throws Exception {
        ProxyIoSession proxyIoSession = (ProxyIoSession) session
                .getAttribute(ProxyIoSession.PROXY_SESSION);

        if (proxyIoSession.getRequest() instanceof SocksProxyRequest
                || proxyIoSession.isAuthenticationFailed()
                || proxyIoSession.getHandler().isHandshakeComplete()) {
            proxySessionOpened(session);
        } else {
            logger.debug("Filtered session opened event !");
        }
    }
}