001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.mina.example.proxy; 021 022import java.nio.charset.Charset; 023 024import org.apache.mina.core.buffer.IoBuffer; 025import org.apache.mina.core.service.IoHandlerAdapter; 026import org.apache.mina.core.session.IoSession; 027import org.slf4j.Logger; 028import org.slf4j.LoggerFactory; 029 030/** 031 * Base class of {@link org.apache.mina.core.service.IoHandler} classes which handle 032 * proxied connections. 033 * 034 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 035 */ 036public abstract class AbstractProxyIoHandler extends IoHandlerAdapter { 037 private static final Charset CHARSET = Charset.forName("iso8859-1"); 038 public static final String OTHER_IO_SESSION = AbstractProxyIoHandler.class.getName()+".OtherIoSession"; 039 040 private final static Logger LOGGER = LoggerFactory.getLogger(AbstractProxyIoHandler.class); 041 042 /** 043 * {@inheritDoc} 044 */ 045 @Override 046 public void sessionCreated(IoSession session) throws Exception { 047 session.suspendRead(); 048 session.suspendWrite(); 049 } 050 051 /** 052 * {@inheritDoc} 053 */ 054 @Override 055 public void sessionClosed(IoSession session) throws Exception { 056 if (session.getAttribute( OTHER_IO_SESSION ) != null) { 057 IoSession sess = (IoSession) session.getAttribute(OTHER_IO_SESSION); 058 sess.setAttribute(OTHER_IO_SESSION, null); 059 sess.close(false); 060 session.setAttribute(OTHER_IO_SESSION, null); 061 } 062 } 063 064 /** 065 * {@inheritDoc} 066 */ 067 @Override 068 public void messageReceived(IoSession session, Object message) 069 throws Exception { 070 IoBuffer rb = (IoBuffer) message; 071 IoBuffer wb = IoBuffer.allocate(rb.remaining()); 072 rb.mark(); 073 wb.put(rb); 074 wb.flip(); 075 ((IoSession) session.getAttribute(OTHER_IO_SESSION)).write(wb); 076 rb.reset(); 077 LOGGER.info(rb.getString(CHARSET.newDecoder())); 078 } 079}