283 lines
9.3 KiB
Java
283 lines
9.3 KiB
Java
/*
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* Copyright 2012 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;
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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.channel.LoggingHandler.Event;
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import io.netty.channel.local.LocalAddress;
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import org.hamcrest.Matchers;
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import org.junit.Test;
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import java.nio.channels.ClosedChannelException;
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import static org.junit.Assert.*;
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public class ReentrantChannelTest extends BaseChannelTest {
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@Test
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public void testWritabilityChanged() throws Exception {
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LocalAddress addr = new LocalAddress("testWritabilityChanged");
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ServerBootstrap sb = getLocalServerBootstrap();
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sb.bind(addr).sync().channel();
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Bootstrap cb = getLocalClientBootstrap();
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setInterest(Event.WRITE, Event.FLUSH, Event.WRITABILITY);
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Channel clientChannel = cb.connect(addr).sync().channel();
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clientChannel.config().setWriteBufferLowWaterMark(512);
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clientChannel.config().setWriteBufferHighWaterMark(1024);
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// What is supposed to happen from this point:
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//
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// 1. Because this write attempt has been made from a non-I/O thread,
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// ChannelOutboundBuffer.pendingWriteBytes will be increased before
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// write() event is really evaluated.
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// -> channelWritabilityChanged() will be triggered,
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// because the Channel became unwritable.
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//
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// 2. The write() event is handled by the pipeline in an I/O thread.
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// -> write() will be triggered.
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//
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// 3. Once the write() event is handled, ChannelOutboundBuffer.pendingWriteBytes
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// will be decreased.
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// -> channelWritabilityChanged() will be triggered,
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// because the Channel became writable again.
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//
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// 4. The message is added to the ChannelOutboundBuffer and thus
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// pendingWriteBytes will be increased again.
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// -> channelWritabilityChanged() will be triggered.
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//
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// 5. The flush() event causes the write request in theChannelOutboundBuffer
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// to be removed.
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// -> flush() and channelWritabilityChanged() will be triggered.
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//
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// Note that the channelWritabilityChanged() in the step 4 can occur between
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// the flush() and the channelWritabilityChanged() in the step 5, because
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// the flush() is invoked from a non-I/O thread while the other are from
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// an I/O thread.
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ChannelFuture future = clientChannel.write(createTestBuf(2000));
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clientChannel.flush();
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future.sync();
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clientChannel.close().sync();
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assertLog(
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// Case 1:
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"WRITABILITY: writable=false\n" +
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"WRITE\n" +
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"WRITABILITY: writable=false\n" +
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"WRITABILITY: writable=false\n" +
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"FLUSH\n" +
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"WRITABILITY: writable=true\n",
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// Case 2:
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"WRITABILITY: writable=false\n" +
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"WRITE\n" +
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"WRITABILITY: writable=false\n" +
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"FLUSH\n" +
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"WRITABILITY: writable=true\n" +
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"WRITABILITY: writable=true\n");
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}
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/**
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* Similar to {@link #testWritabilityChanged()} with slight variation.
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*/
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@Test
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public void testFlushInWritabilityChanged() throws Exception {
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LocalAddress addr = new LocalAddress("testFlushInWritabilityChanged");
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ServerBootstrap sb = getLocalServerBootstrap();
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sb.bind(addr).sync().channel();
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Bootstrap cb = getLocalClientBootstrap();
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setInterest(Event.WRITE, Event.FLUSH, Event.WRITABILITY);
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Channel clientChannel = cb.connect(addr).sync().channel();
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clientChannel.config().setWriteBufferLowWaterMark(512);
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clientChannel.config().setWriteBufferHighWaterMark(1024);
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clientChannel.pipeline().addLast(new ChannelHandler() {
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@Override
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public void channelWritabilityChanged(ChannelHandlerContext ctx) throws Exception {
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if (!ctx.channel().isWritable()) {
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ctx.channel().flush();
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}
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ctx.fireChannelWritabilityChanged();
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}
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});
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assertTrue(clientChannel.isWritable());
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clientChannel.write(createTestBuf(2000)).sync();
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clientChannel.close().sync();
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assertLog(
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// Case 1:
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"WRITABILITY: writable=false\n" +
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"FLUSH\n" +
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"WRITE\n" +
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"WRITABILITY: writable=false\n" +
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"WRITABILITY: writable=false\n" +
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"FLUSH\n" +
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"WRITABILITY: writable=true\n",
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// Case 2:
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"WRITABILITY: writable=false\n" +
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"FLUSH\n" +
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"WRITE\n" +
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"WRITABILITY: writable=false\n" +
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"FLUSH\n" +
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"WRITABILITY: writable=true\n" +
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"WRITABILITY: writable=true\n");
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}
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@Test
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public void testWriteFlushPingPong() throws Exception {
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LocalAddress addr = new LocalAddress("testWriteFlushPingPong");
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ServerBootstrap sb = getLocalServerBootstrap();
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sb.bind(addr).sync().channel();
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Bootstrap cb = getLocalClientBootstrap();
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setInterest(Event.WRITE, Event.FLUSH, Event.CLOSE, Event.EXCEPTION);
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Channel clientChannel = cb.connect(addr).sync().channel();
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clientChannel.pipeline().addLast(new ChannelHandler() {
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int writeCount;
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int flushCount;
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@Override
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public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
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if (writeCount < 5) {
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writeCount++;
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ctx.channel().flush();
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}
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ctx.write(msg, promise);
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}
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@Override
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public void flush(ChannelHandlerContext ctx) throws Exception {
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if (flushCount < 5) {
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flushCount++;
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ctx.channel().write(createTestBuf(2000));
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}
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ctx.flush();
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}
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});
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clientChannel.writeAndFlush(createTestBuf(2000)).sync();
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clientChannel.close().sync();
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assertLog(
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"WRITE\n" +
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"FLUSH\n" +
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"WRITE\n" +
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"FLUSH\n" +
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"WRITE\n" +
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"FLUSH\n" +
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"WRITE\n" +
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"FLUSH\n" +
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"WRITE\n" +
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"FLUSH\n" +
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"WRITE\n" +
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"FLUSH\n" +
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"CLOSE\n");
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}
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@Test
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public void testCloseInFlush() throws Exception {
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LocalAddress addr = new LocalAddress("testCloseInFlush");
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ServerBootstrap sb = getLocalServerBootstrap();
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sb.bind(addr).sync().channel();
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Bootstrap cb = getLocalClientBootstrap();
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setInterest(Event.WRITE, Event.FLUSH, Event.CLOSE, Event.EXCEPTION);
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Channel clientChannel = cb.connect(addr).sync().channel();
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clientChannel.pipeline().addLast(new ChannelHandler() {
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@Override
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public void write(final ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
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promise.addListener(future -> ctx.channel().close());
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ctx.write(msg, promise);
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ctx.channel().flush();
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}
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});
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clientChannel.write(createTestBuf(2000)).sync();
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clientChannel.closeFuture().sync();
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assertLog("WRITE\nFLUSH\nCLOSE\n");
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}
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@Test
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public void testFlushFailure() throws Exception {
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LocalAddress addr = new LocalAddress("testFlushFailure");
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ServerBootstrap sb = getLocalServerBootstrap();
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sb.bind(addr).sync().channel();
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Bootstrap cb = getLocalClientBootstrap();
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setInterest(Event.WRITE, Event.FLUSH, Event.CLOSE, Event.EXCEPTION);
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Channel clientChannel = cb.connect(addr).sync().channel();
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clientChannel.pipeline().addLast(new ChannelHandler() {
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@Override
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public void flush(ChannelHandlerContext ctx) throws Exception {
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throw new Exception("intentional failure");
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}
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}, new ChannelHandler() {
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
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ctx.close();
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}
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});
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try {
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clientChannel.writeAndFlush(createTestBuf(2000)).sync();
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fail();
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} catch (Throwable cce) {
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// FIXME: shouldn't this contain the "intentional failure" exception?
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assertThat(cce.getCause(), Matchers.instanceOf(ClosedChannelException.class));
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}
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clientChannel.closeFuture().sync();
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assertLog("WRITE\nCLOSE\n");
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}
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}
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