322 lines
12 KiB
Java
322 lines
12 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.epoll;
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import io.netty.bootstrap.Bootstrap;
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import io.netty.bootstrap.ServerBootstrap;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.Unpooled;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundHandlerAdapter;
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import io.netty.channel.EventLoopGroup;
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import io.netty.channel.SimpleChannelInboundHandler;
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import io.netty.channel.unix.FileDescriptor;
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import io.netty.util.NetUtil;
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import org.junit.Assert;
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import org.junit.Test;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.util.Random;
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import java.util.concurrent.atomic.AtomicReference;
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import static org.junit.Assert.assertEquals;
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public class EpollSpliceTest {
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private static final int SPLICE_LEN = 32 * 1024;
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private static final Random random = new Random();
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private static final byte[] data = new byte[1048576];
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static {
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random.nextBytes(data);
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}
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@Test
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public void spliceToSocket() throws Throwable {
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final EchoHandler sh = new EchoHandler();
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final EchoHandler ch = new EchoHandler();
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EventLoopGroup group = new EpollEventLoopGroup(1);
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ServerBootstrap bs = new ServerBootstrap();
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bs.channel(EpollServerSocketChannel.class);
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bs.group(group).childHandler(sh);
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final Channel sc = bs.bind(NetUtil.LOCALHOST, 0).syncUninterruptibly().channel();
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ServerBootstrap bs2 = new ServerBootstrap();
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bs2.channel(EpollServerSocketChannel.class);
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bs2.childOption(EpollChannelOption.EPOLL_MODE, EpollMode.LEVEL_TRIGGERED);
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bs2.group(group).childHandler(new ChannelInboundHandlerAdapter() {
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@Override
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public void channelActive(final ChannelHandlerContext ctx) throws Exception {
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ctx.channel().config().setAutoRead(false);
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Bootstrap bs = new Bootstrap();
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bs.option(EpollChannelOption.EPOLL_MODE, EpollMode.LEVEL_TRIGGERED);
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bs.channel(EpollSocketChannel.class);
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bs.group(ctx.channel().eventLoop()).handler(new ChannelInboundHandlerAdapter() {
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@Override
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public void channelActive(ChannelHandlerContext context) throws Exception {
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final EpollSocketChannel ch = (EpollSocketChannel) ctx.channel();
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final EpollSocketChannel ch2 = (EpollSocketChannel) context.channel();
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// We are splicing two channels together, at this point we have a tcp proxy which handles all
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// the data transfer only in kernel space!
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// Integer.MAX_VALUE will splice infinitly.
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ch.spliceTo(ch2, Integer.MAX_VALUE).addListener(new ChannelFutureListener() {
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@Override
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public void operationComplete(ChannelFuture future) throws Exception {
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if (!future.isSuccess()) {
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future.channel().close();
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}
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}
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});
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// Trigger multiple splices to see if partial splicing works as well.
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ch2.spliceTo(ch, SPLICE_LEN).addListener(new ChannelFutureListener() {
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@Override
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public void operationComplete(ChannelFuture future) throws Exception {
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if (!future.isSuccess()) {
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future.channel().close();
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} else {
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ch2.spliceTo(ch, SPLICE_LEN).addListener(this);
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}
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}
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});
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ctx.channel().config().setAutoRead(true);
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}
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@Override
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public void channelInactive(ChannelHandlerContext context) throws Exception {
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context.close();
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}
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});
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bs.connect(sc.localAddress()).addListener(new ChannelFutureListener() {
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@Override
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public void operationComplete(ChannelFuture future) throws Exception {
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if (!future.isSuccess()) {
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ctx.close();
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} else {
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future.channel().closeFuture().addListener(new ChannelFutureListener() {
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@Override
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public void operationComplete(ChannelFuture future) throws Exception {
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ctx.close();
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}
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});
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}
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}
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});
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}
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});
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Channel pc = bs2.bind(NetUtil.LOCALHOST, 0).syncUninterruptibly().channel();
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Bootstrap cb = new Bootstrap();
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cb.group(group);
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cb.channel(EpollSocketChannel.class);
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cb.handler(ch);
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Channel cc = cb.connect(pc.localAddress()).syncUninterruptibly().channel();
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for (int i = 0; i < data.length;) {
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int length = Math.min(random.nextInt(1024 * 64), data.length - i);
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ByteBuf buf = Unpooled.wrappedBuffer(data, i, length);
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cc.writeAndFlush(buf);
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i += length;
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}
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while (ch.counter < data.length) {
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if (sh.exception.get() != null) {
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break;
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}
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if (ch.exception.get() != null) {
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break;
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}
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try {
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Thread.sleep(50);
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} catch (InterruptedException e) {
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// Ignore.
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}
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}
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while (sh.counter < data.length) {
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if (sh.exception.get() != null) {
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break;
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}
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if (ch.exception.get() != null) {
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break;
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}
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try {
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Thread.sleep(50);
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} catch (InterruptedException e) {
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// Ignore.
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}
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}
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sh.channel.close().sync();
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ch.channel.close().sync();
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sc.close().sync();
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pc.close().sync();
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group.shutdownGracefully();
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if (sh.exception.get() != null && !(sh.exception.get() instanceof IOException)) {
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throw sh.exception.get();
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}
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if (ch.exception.get() != null && !(ch.exception.get() instanceof IOException)) {
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throw ch.exception.get();
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}
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if (sh.exception.get() != null) {
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throw sh.exception.get();
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}
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if (ch.exception.get() != null) {
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throw ch.exception.get();
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}
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}
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@Test
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public void spliceToFile() throws Throwable {
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EventLoopGroup group = new EpollEventLoopGroup(1);
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File file = File.createTempFile("netty-splice", null);
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file.deleteOnExit();
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SpliceHandler sh = new SpliceHandler(file);
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ServerBootstrap bs = new ServerBootstrap();
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bs.channel(EpollServerSocketChannel.class);
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bs.group(group).childHandler(sh);
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bs.childOption(EpollChannelOption.EPOLL_MODE, EpollMode.LEVEL_TRIGGERED);
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Channel sc = bs.bind(NetUtil.LOCALHOST, 0).syncUninterruptibly().channel();
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Bootstrap cb = new Bootstrap();
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cb.group(group);
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cb.channel(EpollSocketChannel.class);
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cb.handler(new ChannelInboundHandlerAdapter());
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Channel cc = cb.connect(sc.localAddress()).syncUninterruptibly().channel();
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for (int i = 0; i < data.length;) {
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int length = Math.min(random.nextInt(1024 * 64), data.length - i);
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ByteBuf buf = Unpooled.wrappedBuffer(data, i, length);
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cc.writeAndFlush(buf);
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i += length;
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}
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while (sh.future == null || !sh.future.isDone()) {
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if (sh.exception.get() != null) {
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break;
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}
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try {
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Thread.sleep(50);
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} catch (InterruptedException e) {
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// Ignore.
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}
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}
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sc.close().sync();
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cc.close().sync();
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if (sh.exception.get() != null && !(sh.exception.get() instanceof IOException)) {
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throw sh.exception.get();
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}
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byte[] written = new byte[data.length];
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FileInputStream in = new FileInputStream(file);
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try {
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Assert.assertEquals(written.length, in.read(written));
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Assert.assertArrayEquals(data, written);
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} finally {
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in.close();
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group.shutdownGracefully();
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}
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}
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private static class EchoHandler extends SimpleChannelInboundHandler<ByteBuf> {
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volatile Channel channel;
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final AtomicReference<Throwable> exception = new AtomicReference<Throwable>();
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volatile int counter;
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@Override
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public void channelActive(ChannelHandlerContext ctx)
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throws Exception {
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channel = ctx.channel();
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}
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@Override
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public void channelRead0(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
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byte[] actual = new byte[in.readableBytes()];
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in.readBytes(actual);
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int lastIdx = counter;
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for (int i = 0; i < actual.length; i ++) {
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assertEquals(data[i + lastIdx], actual[i]);
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}
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if (channel.parent() != null) {
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channel.write(Unpooled.wrappedBuffer(actual));
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}
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counter += actual.length;
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}
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@Override
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public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
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ctx.flush();
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx,
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Throwable cause) throws Exception {
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if (exception.compareAndSet(null, cause)) {
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cause.printStackTrace();
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ctx.close();
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}
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}
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}
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private static class SpliceHandler extends ChannelInboundHandlerAdapter {
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private final File file;
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volatile Channel channel;
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volatile ChannelFuture future;
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final AtomicReference<Throwable> exception = new AtomicReference<Throwable>();
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SpliceHandler(File file) {
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this.file = file;
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}
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@Override
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public void channelActive(ChannelHandlerContext ctx)
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throws Exception {
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channel = ctx.channel();
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final EpollSocketChannel ch = (EpollSocketChannel) ctx.channel();
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final FileDescriptor fd = FileDescriptor.from(file);
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future = ch.spliceTo(fd, 0, data.length);
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx,
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Throwable cause) throws Exception {
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if (exception.compareAndSet(null, cause)) {
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cause.printStackTrace();
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ctx.close();
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}
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}
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}
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}
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