/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.oncrpc;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ExceptionEvent;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelHandler;
/**
* Handler used by {@link SimpleUdpServer}.
*/
public class SimpleUdpServerHandler extends SimpleChannelHandler {
public static final Log LOG = LogFactory.getLog(SimpleUdpServerHandler.class);
private final RpcProgram rpcProgram;
public SimpleUdpServerHandler(RpcProgram rpcProgram) {
this.rpcProgram = rpcProgram;
}
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
ChannelBuffer buf = (ChannelBuffer) e.getMessage();
XDR request = new XDR();
request.writeFixedOpaque(buf.array());
InetAddress remoteInetAddr = ((InetSocketAddress) e.getRemoteAddress())
.getAddress();
XDR response = rpcProgram.handle(request, remoteInetAddr, null);
e.getChannel().write(XDR.writeMessageUdp(response), e.getRemoteAddress());
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
LOG.warn("Encountered ", e.getCause());
e.getChannel().close();
}
}