/*
* 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.mina.core.nio.udp;
import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.DatagramChannel;
import io.netty.channel.socket.DatagramPacket;
import io.netty.channel.socket.nio.NioDatagramChannel;
import io.netty.util.Attribute;
import java.io.IOException;
import org.apache.mina.core.Netty4BenchmarkServer;
/**
* A Netty 4 based UDP server
*
* @author <a href="http://mina.apache.org">Apache MINA Project</a>
*/
public class Netty4UdpBenchmarkServer extends Netty4BenchmarkServer {
private Bootstrap bootstrap;
/**
* {@inheritDoc}
*/
public void start(int port) throws IOException {
bootstrap = new Bootstrap();
bootstrap.group(new NioEventLoopGroup());
bootstrap.channel(NioDatagramChannel.class);
bootstrap.option(ChannelOption.SO_RCVBUF, 65536);
bootstrap.handler(new ChannelInitializer<DatagramChannel>() {
@Override
protected void initChannel(DatagramChannel ch) throws Exception {
ch.pipeline().addLast(new SimpleChannelInboundHandler<DatagramPacket>() {
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
ctx.attr(STATE_ATTRIBUTE).set(State.WAIT_FOR_FIRST_BYTE_LENGTH);
}
@Override
protected void channelRead0(ChannelHandlerContext ctx, DatagramPacket message) throws Exception {
ByteBuf buffer = message.content();
State state = ctx.attr(STATE_ATTRIBUTE).get();
int length = 0;
Attribute<Integer> lengthAttribute = ctx.attr(LENGTH_ATTRIBUTE);
if (lengthAttribute.get() != null) {
length = lengthAttribute.get();
}
while (buffer.readableBytes() > 0) {
switch (state) {
case WAIT_FOR_FIRST_BYTE_LENGTH:
length = (buffer.readByte() & 255) << 24;
state = State.WAIT_FOR_SECOND_BYTE_LENGTH;
break;
case WAIT_FOR_SECOND_BYTE_LENGTH:
length += (buffer.readByte() & 255) << 16;
state = State.WAIT_FOR_THIRD_BYTE_LENGTH;
break;
case WAIT_FOR_THIRD_BYTE_LENGTH:
length += (buffer.readByte() & 255) << 8;
state = State.WAIT_FOR_FOURTH_BYTE_LENGTH;
break;
case WAIT_FOR_FOURTH_BYTE_LENGTH:
length += (buffer.readByte() & 255);
state = State.READING;
if ((length == 0) && (buffer.readableBytes() == 0)) {
ctx.writeAndFlush(new DatagramPacket(ACK.retain(1).resetReaderIndex(), message.sender()));
state = State.WAIT_FOR_FIRST_BYTE_LENGTH;
}
break;
case READING:
int remaining = buffer.readableBytes();
if (length > remaining) {
length -= remaining;
buffer.skipBytes(remaining);
} else {
buffer.skipBytes(length);
ctx.writeAndFlush(new DatagramPacket(ACK.retain(1).resetReaderIndex(), message.sender()));
state = State.WAIT_FOR_FIRST_BYTE_LENGTH;
length = 0;
}
}
}
ctx.attr(STATE_ATTRIBUTE).set(state);
ctx.attr(LENGTH_ATTRIBUTE).set(length);
}
});
}
});
bootstrap.bind(port);
}
/**
* {@inheritedDoc}
*/
public void stop() throws IOException {
bootstrap.group().shutdownGracefully();
}
}