/*
* 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.transport.udt.util;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundByteHandlerAdapter;
import io.netty.channel.ChannelOption;
import io.netty.transport.udt.nio.NioUdtProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.yammer.metrics.core.Meter;
/**
* 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 EchoByteHandler extends ChannelInboundByteHandlerAdapter {
private static final Logger log = LoggerFactory
.getLogger(EchoByteHandler.class.getName());
private final ByteBuf message;
private final Meter meter;
public Meter meter() {
return meter;
}
public EchoByteHandler(final Meter meter, final int messageSize) {
this.meter = meter;
message = Unpooled.buffer(messageSize);
for (int i = 0; i < message.capacity(); i++) {
message.writeByte((byte) i);
}
}
@Override
public void channelActive(final ChannelHandlerContext ctx) throws Exception {
log.info("ECHO active {}", NioUdtProvider.socketUDT(ctx.channel())
.toStringOptions());
ctx.write(message);
ctx.flush();
}
@Override
public void inboundBufferUpdated(final ChannelHandlerContext ctx,
final ByteBuf in) {
if (meter != null) {
meter.mark(in.readableBytes());
}
final ByteBuf out = ctx.nextOutboundByteBuffer();
out.discardReadBytes(); // FIXME
out.writeBytes(in);
ctx.flush();
}
@Override
public void exceptionCaught(final ChannelHandlerContext ctx,
final Throwable e) {
log.error("exception : {}", e.getMessage());
ctx.close();
}
@Override
public ByteBuf newInboundBuffer(final ChannelHandlerContext ctx)
throws Exception {
return ctx.alloc().directBuffer(
ctx.channel().config().getOption(ChannelOption.SO_RCVBUF));
}
}