/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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 io.netty.example.udt.echo.message;
import com.yammer.metrics.Metrics;
import com.yammer.metrics.core.Meter;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.MessageBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import io.netty.channel.udt.UdtMessage;
import io.netty.channel.udt.nio.NioUdtProvider;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Handler implementation for the echo client. It initiates the ping-pong
* traffic between the echo client and server by sending the first message to
* the server on activation.
*/
public class MsgEchoClientHandler extends
ChannelInboundMessageHandlerAdapter<UdtMessage> {
private static final Logger log = Logger.getLogger(MsgEchoClientHandler.class.getName());
private final UdtMessage message;
public MsgEchoClientHandler(final int messageSize) {
final ByteBuf byteBuf = Unpooled.buffer(messageSize);
for (int i = 0; i < byteBuf.capacity(); i++) {
byteBuf.writeByte((byte) i);
}
message = new UdtMessage(byteBuf);
}
final Meter meter = Metrics.newMeter(MsgEchoClientHandler.class, "rate",
"bytes", TimeUnit.SECONDS);
@Override
public void channelActive(final ChannelHandlerContext ctx) throws Exception {
log.info("ECHO active " + NioUdtProvider.socketUDT(ctx.channel()).toStringOptions());
final MessageBuf<Object> out = ctx.nextOutboundMessageBuffer();
out.add(message);
ctx.flush();
}
@Override
public void exceptionCaught(final ChannelHandlerContext ctx,
final Throwable cause) {
log.log(Level.WARNING, "close the connection when an exception is raised", cause);
ctx.close();
}
@Override
public void messageReceived(final ChannelHandlerContext ctx,
final UdtMessage message) throws Exception {
final ByteBuf byteBuf = message.data();
meter.mark(byteBuf.readableBytes());
final MessageBuf<Object> out = ctx.nextOutboundMessageBuffer();
out.add(message.retain());
ctx.flush();
}
}