fabc6ee1bc
Motivation: testChannelInitializerEventExecutor() did sometimes fail as we sometimes miss to count down the latch. This can happen when we remove the handler from the pipeline before channelUnregistered(...) was called for it. Modifications: Countdown the latch in handlerRemoved(...). Result: Fix flaky test.
403 lines
15 KiB
Java
403 lines
15 KiB
Java
/*
|
|
* Copyright 2016 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.channel;
|
|
|
|
import io.netty.bootstrap.Bootstrap;
|
|
import io.netty.bootstrap.ServerBootstrap;
|
|
import io.netty.channel.embedded.EmbeddedChannel;
|
|
import io.netty.channel.local.LocalAddress;
|
|
import io.netty.channel.local.LocalChannel;
|
|
import io.netty.channel.local.LocalServerChannel;
|
|
import io.netty.util.concurrent.EventExecutor;
|
|
import io.netty.util.concurrent.Future;
|
|
import org.junit.After;
|
|
import org.junit.Before;
|
|
import org.junit.Test;
|
|
|
|
import java.util.Iterator;
|
|
import java.util.Map;
|
|
import java.util.concurrent.CountDownLatch;
|
|
import java.util.concurrent.Executors;
|
|
import java.util.concurrent.ScheduledExecutorService;
|
|
import java.util.concurrent.TimeUnit;
|
|
import java.util.concurrent.atomic.AtomicBoolean;
|
|
import java.util.concurrent.atomic.AtomicInteger;
|
|
import java.util.concurrent.atomic.AtomicReference;
|
|
|
|
import static org.junit.Assert.assertEquals;
|
|
import static org.junit.Assert.assertTrue;
|
|
import static org.junit.Assert.assertFalse;
|
|
import static org.junit.Assert.assertNotNull;
|
|
import static org.junit.Assert.assertSame;
|
|
|
|
public class ChannelInitializerTest {
|
|
private static final int TIMEOUT_MILLIS = 1000;
|
|
private static final LocalAddress SERVER_ADDRESS = new LocalAddress("addr");
|
|
private EventLoopGroup group;
|
|
private ServerBootstrap server;
|
|
private Bootstrap client;
|
|
private InspectableHandler testHandler;
|
|
|
|
@Before
|
|
public void setUp() {
|
|
group = new DefaultEventLoopGroup(1);
|
|
server = new ServerBootstrap()
|
|
.group(group)
|
|
.channel(LocalServerChannel.class)
|
|
.localAddress(SERVER_ADDRESS);
|
|
client = new Bootstrap()
|
|
.group(group)
|
|
.channel(LocalChannel.class)
|
|
.handler(new ChannelInboundHandlerAdapter());
|
|
testHandler = new InspectableHandler();
|
|
}
|
|
|
|
@After
|
|
public void tearDown() {
|
|
group.shutdownGracefully(0, TIMEOUT_MILLIS, TimeUnit.MILLISECONDS).syncUninterruptibly();
|
|
}
|
|
|
|
@Test
|
|
public void testInitChannelThrowsRegisterFirst() {
|
|
testInitChannelThrows(true);
|
|
}
|
|
|
|
@Test
|
|
public void testInitChannelThrowsRegisterAfter() {
|
|
testInitChannelThrows(false);
|
|
}
|
|
|
|
private void testInitChannelThrows(boolean registerFirst) {
|
|
final Exception exception = new Exception();
|
|
final AtomicReference<Throwable> causeRef = new AtomicReference<Throwable>();
|
|
|
|
ChannelPipeline pipeline = new LocalChannel().pipeline();
|
|
|
|
if (registerFirst) {
|
|
group.register(pipeline.channel()).syncUninterruptibly();
|
|
}
|
|
pipeline.addFirst(new ChannelInitializer<Channel>() {
|
|
@Override
|
|
protected void initChannel(Channel ch) throws Exception {
|
|
throw exception;
|
|
}
|
|
|
|
@Override
|
|
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
|
|
causeRef.set(cause);
|
|
super.exceptionCaught(ctx, cause);
|
|
}
|
|
});
|
|
|
|
if (!registerFirst) {
|
|
group.register(pipeline.channel()).syncUninterruptibly();
|
|
}
|
|
pipeline.channel().close().syncUninterruptibly();
|
|
pipeline.channel().closeFuture().syncUninterruptibly();
|
|
|
|
assertSame(exception, causeRef.get());
|
|
}
|
|
|
|
@Test
|
|
public void testChannelInitializerInInitializerCorrectOrdering() {
|
|
final ChannelInboundHandlerAdapter handler1 = new ChannelInboundHandlerAdapter();
|
|
final ChannelInboundHandlerAdapter handler2 = new ChannelInboundHandlerAdapter();
|
|
final ChannelInboundHandlerAdapter handler3 = new ChannelInboundHandlerAdapter();
|
|
final ChannelInboundHandlerAdapter handler4 = new ChannelInboundHandlerAdapter();
|
|
|
|
client.handler(new ChannelInitializer<Channel>() {
|
|
@Override
|
|
protected void initChannel(Channel ch) throws Exception {
|
|
ch.pipeline().addLast(handler1);
|
|
ch.pipeline().addLast(new ChannelInitializer<Channel>() {
|
|
@Override
|
|
protected void initChannel(Channel ch) throws Exception {
|
|
ch.pipeline().addLast(handler2);
|
|
ch.pipeline().addLast(handler3);
|
|
}
|
|
});
|
|
ch.pipeline().addLast(handler4);
|
|
}
|
|
}).localAddress(LocalAddress.ANY);
|
|
|
|
Channel channel = client.bind().syncUninterruptibly().channel();
|
|
try {
|
|
// Execute some task on the EventLoop and wait until its done to be sure all handlers are added to the
|
|
// pipeline.
|
|
channel.eventLoop().submit(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
// NOOP
|
|
}
|
|
}).syncUninterruptibly();
|
|
Iterator<Map.Entry<String, ChannelHandler>> handlers = channel.pipeline().iterator();
|
|
assertSame(handler1, handlers.next().getValue());
|
|
assertSame(handler2, handlers.next().getValue());
|
|
assertSame(handler3, handlers.next().getValue());
|
|
assertSame(handler4, handlers.next().getValue());
|
|
assertFalse(handlers.hasNext());
|
|
} finally {
|
|
channel.close().syncUninterruptibly();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testChannelInitializerReentrance() {
|
|
final AtomicInteger registeredCalled = new AtomicInteger(0);
|
|
final ChannelInboundHandlerAdapter handler1 = new ChannelInboundHandlerAdapter() {
|
|
@Override
|
|
public void channelRegistered(ChannelHandlerContext ctx) throws Exception {
|
|
registeredCalled.incrementAndGet();
|
|
}
|
|
};
|
|
final AtomicInteger initChannelCalled = new AtomicInteger(0);
|
|
client.handler(new ChannelInitializer<Channel>() {
|
|
@Override
|
|
protected void initChannel(Channel ch) throws Exception {
|
|
initChannelCalled.incrementAndGet();
|
|
ch.pipeline().addLast(handler1);
|
|
ch.pipeline().fireChannelRegistered();
|
|
}
|
|
}).localAddress(LocalAddress.ANY);
|
|
|
|
Channel channel = client.bind().syncUninterruptibly().channel();
|
|
try {
|
|
// Execute some task on the EventLoop and wait until its done to be sure all handlers are added to the
|
|
// pipeline.
|
|
channel.eventLoop().submit(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
// NOOP
|
|
}
|
|
}).syncUninterruptibly();
|
|
assertEquals(1, initChannelCalled.get());
|
|
assertEquals(2, registeredCalled.get());
|
|
} finally {
|
|
channel.close().syncUninterruptibly();
|
|
}
|
|
}
|
|
|
|
@Test(timeout = TIMEOUT_MILLIS)
|
|
public void firstHandlerInPipelineShouldReceiveChannelRegisteredEvent() {
|
|
testChannelRegisteredEventPropagation(new ChannelInitializer<LocalChannel>() {
|
|
@Override
|
|
public void initChannel(LocalChannel channel) {
|
|
channel.pipeline().addFirst(testHandler);
|
|
}
|
|
});
|
|
}
|
|
|
|
@Test(timeout = TIMEOUT_MILLIS)
|
|
public void lastHandlerInPipelineShouldReceiveChannelRegisteredEvent() {
|
|
testChannelRegisteredEventPropagation(new ChannelInitializer<LocalChannel>() {
|
|
@Override
|
|
public void initChannel(LocalChannel channel) {
|
|
channel.pipeline().addLast(testHandler);
|
|
}
|
|
});
|
|
}
|
|
|
|
@Test
|
|
public void testAddFirstChannelInitializer() {
|
|
testAddChannelInitializer(true);
|
|
}
|
|
|
|
@Test
|
|
public void testAddLastChannelInitializer() {
|
|
testAddChannelInitializer(false);
|
|
}
|
|
|
|
private static void testAddChannelInitializer(final boolean first) {
|
|
final AtomicBoolean called = new AtomicBoolean();
|
|
EmbeddedChannel channel = new EmbeddedChannel(new ChannelInitializer<Channel>() {
|
|
@Override
|
|
protected void initChannel(Channel ch) throws Exception {
|
|
ChannelHandler handler = new ChannelInitializer<Channel>() {
|
|
@Override
|
|
protected void initChannel(Channel ch) throws Exception {
|
|
called.set(true);
|
|
}
|
|
};
|
|
if (first) {
|
|
ch.pipeline().addFirst(handler);
|
|
} else {
|
|
ch.pipeline().addLast(handler);
|
|
}
|
|
}
|
|
});
|
|
channel.finish();
|
|
assertTrue(called.get());
|
|
}
|
|
|
|
private void testChannelRegisteredEventPropagation(ChannelInitializer<LocalChannel> init) {
|
|
Channel clientChannel = null, serverChannel = null;
|
|
try {
|
|
server.childHandler(init);
|
|
serverChannel = server.bind().syncUninterruptibly().channel();
|
|
clientChannel = client.connect(SERVER_ADDRESS).syncUninterruptibly().channel();
|
|
assertEquals(1, testHandler.channelRegisteredCount.get());
|
|
} finally {
|
|
closeChannel(clientChannel);
|
|
closeChannel(serverChannel);
|
|
}
|
|
}
|
|
|
|
@SuppressWarnings("deprecation")
|
|
@Test(timeout = 10000)
|
|
public void testChannelInitializerEventExecutor() throws Throwable {
|
|
final AtomicInteger invokeCount = new AtomicInteger();
|
|
final AtomicInteger completeCount = new AtomicInteger();
|
|
final AtomicReference<Throwable> errorRef = new AtomicReference<Throwable>();
|
|
LocalAddress addr = new LocalAddress("test");
|
|
|
|
final EventExecutor executor = new DefaultEventLoop() {
|
|
private final ScheduledExecutorService execService = Executors.newSingleThreadScheduledExecutor();
|
|
|
|
@Override
|
|
public void shutdown() {
|
|
execService.shutdown();
|
|
}
|
|
|
|
@Override
|
|
public boolean inEventLoop(Thread thread) {
|
|
// Always return false which will ensure we always call execute(...)
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public boolean isShuttingDown() {
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public Future<?> shutdownGracefully(long quietPeriod, long timeout, TimeUnit unit) {
|
|
throw new IllegalStateException();
|
|
}
|
|
|
|
@Override
|
|
public Future<?> terminationFuture() {
|
|
throw new IllegalStateException();
|
|
}
|
|
|
|
@Override
|
|
public boolean isShutdown() {
|
|
return execService.isShutdown();
|
|
}
|
|
|
|
@Override
|
|
public boolean isTerminated() {
|
|
return execService.isTerminated();
|
|
}
|
|
|
|
@Override
|
|
public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
|
|
return execService.awaitTermination(timeout, unit);
|
|
}
|
|
|
|
@Override
|
|
public void execute(Runnable command) {
|
|
execService.execute(command);
|
|
}
|
|
};
|
|
|
|
final CountDownLatch latch = new CountDownLatch(1);
|
|
ServerBootstrap serverBootstrap = new ServerBootstrap()
|
|
.channel(LocalServerChannel.class)
|
|
.group(group)
|
|
.localAddress(addr)
|
|
.childHandler(new ChannelInitializer<LocalChannel>() {
|
|
@Override
|
|
protected void initChannel(LocalChannel ch) {
|
|
ch.pipeline().addLast(executor, new ChannelInitializer<Channel>() {
|
|
@Override
|
|
protected void initChannel(Channel ch) {
|
|
invokeCount.incrementAndGet();
|
|
ChannelHandlerContext ctx = ch.pipeline().context(this);
|
|
assertNotNull(ctx);
|
|
ch.pipeline().addAfter(ctx.executor(),
|
|
ctx.name(), null, new ChannelInboundHandlerAdapter() {
|
|
@Override
|
|
public void channelRead(ChannelHandlerContext ctx, Object msg) {
|
|
// just drop on the floor.
|
|
}
|
|
|
|
@Override
|
|
public void handlerRemoved(ChannelHandlerContext ctx) {
|
|
latch.countDown();
|
|
}
|
|
});
|
|
completeCount.incrementAndGet();
|
|
}
|
|
|
|
@Override
|
|
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
|
|
if (cause instanceof AssertionError) {
|
|
errorRef.set(cause);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
Channel server = serverBootstrap.bind().sync().channel();
|
|
|
|
Bootstrap clientBootstrap = new Bootstrap()
|
|
.channel(LocalChannel.class)
|
|
.group(group)
|
|
.remoteAddress(addr)
|
|
.handler(new ChannelInboundHandlerAdapter());
|
|
|
|
Channel client = clientBootstrap.connect().sync().channel();
|
|
client.writeAndFlush("Hello World").sync();
|
|
|
|
client.close().sync();
|
|
server.close().sync();
|
|
|
|
client.closeFuture().sync();
|
|
server.closeFuture().sync();
|
|
|
|
// Wait until the handler is removed from the pipeline and so no more events are handled by it.
|
|
latch.await();
|
|
|
|
assertEquals(1, invokeCount.get());
|
|
assertEquals(invokeCount.get(), completeCount.get());
|
|
|
|
Throwable cause = errorRef.get();
|
|
if (cause != null) {
|
|
throw cause;
|
|
}
|
|
|
|
executor.shutdown();
|
|
assertTrue(executor.awaitTermination(5, TimeUnit.SECONDS));
|
|
}
|
|
|
|
private static void closeChannel(Channel c) {
|
|
if (c != null) {
|
|
c.close().syncUninterruptibly();
|
|
}
|
|
}
|
|
|
|
private static final class InspectableHandler extends ChannelDuplexHandler {
|
|
final AtomicInteger channelRegisteredCount = new AtomicInteger(0);
|
|
|
|
@Override
|
|
public void channelRegistered(ChannelHandlerContext ctx) {
|
|
channelRegisteredCount.incrementAndGet();
|
|
ctx.fireChannelRegistered();
|
|
}
|
|
}
|
|
}
|