/*
* Copyright 2013 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.bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFactory;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelPromise;
import io.netty.channel.DefaultEventLoopGroup;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.ServerChannel;
import io.netty.channel.local.LocalAddress;
import io.netty.channel.local.LocalChannel;
import io.netty.channel.local.LocalServerChannel;
import io.netty.resolver.NameResolver;
import io.netty.resolver.NameResolverGroup;
import io.netty.resolver.SimpleNameResolver;
import io.netty.util.concurrent.EventExecutor;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.Promise;
import org.junit.AfterClass;
import org.junit.Test;
import java.net.SocketAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
public class BootstrapTest {
private static final EventLoopGroup groupA = new DefaultEventLoopGroup(1);
private static final EventLoopGroup groupB = new DefaultEventLoopGroup(1);
private static final ChannelHandler dummyHandler = new DummyHandler();
@AfterClass
public static void destroy() {
groupA.shutdownGracefully();
groupB.shutdownGracefully();
groupA.terminationFuture().syncUninterruptibly();
groupB.terminationFuture().syncUninterruptibly();
}
@Test(timeout = 10000)
public void testBindDeadLock() throws Exception {
final Bootstrap bootstrapA = new Bootstrap();
bootstrapA.group(groupA);
bootstrapA.channel(LocalChannel.class);
bootstrapA.handler(dummyHandler);
final Bootstrap bootstrapB = new Bootstrap();
bootstrapB.group(groupB);
bootstrapB.channel(LocalChannel.class);
bootstrapB.handler(dummyHandler);
List<Future<?>> bindFutures = new ArrayList<Future<?>>();
// Try to bind from each other.
for (int i = 0; i < 1024; i ++) {
bindFutures.add(groupA.next().submit(new Runnable() {
@Override
public void run() {
bootstrapB.bind(LocalAddress.ANY);
}
}));
bindFutures.add(groupB.next().submit(new Runnable() {
@Override
public void run() {
bootstrapA.bind(LocalAddress.ANY);
}
}));
}
for (Future<?> f: bindFutures) {
f.sync();
}
}
@Test(timeout = 10000)
public void testConnectDeadLock() throws Exception {
final Bootstrap bootstrapA = new Bootstrap();
bootstrapA.group(groupA);
bootstrapA.channel(LocalChannel.class);
bootstrapA.handler(dummyHandler);
final Bootstrap bootstrapB = new Bootstrap();
bootstrapB.group(groupB);
bootstrapB.channel(LocalChannel.class);
bootstrapB.handler(dummyHandler);
List<Future<?>> bindFutures = new ArrayList<Future<?>>();
// Try to connect from each other.
for (int i = 0; i < 1024; i ++) {
bindFutures.add(groupA.next().submit(new Runnable() {
@Override
public void run() {
bootstrapB.connect(LocalAddress.ANY);
}
}));
bindFutures.add(groupB.next().submit(new Runnable() {
@Override
public void run() {
bootstrapA.connect(LocalAddress.ANY);
}
}));
}
for (Future<?> f: bindFutures) {
f.sync();
}
}
@Test
public void testLateRegisterSuccess() throws Exception {
TestEventLoopGroup group = new TestEventLoopGroup();
try {
ServerBootstrap bootstrap = new ServerBootstrap();
bootstrap.group(group);
bootstrap.channel(LocalServerChannel.class);
bootstrap.childHandler(new DummyHandler());
bootstrap.localAddress(new LocalAddress("1"));
ChannelFuture future = bootstrap.bind();
assertFalse(future.isDone());
group.promise.setSuccess();
final BlockingQueue<Boolean> queue = new LinkedBlockingQueue<Boolean>();
future.addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
queue.add(future.channel().eventLoop().inEventLoop(Thread.currentThread()));
queue.add(future.isSuccess());
}
});
assertTrue(queue.take());
assertTrue(queue.take());
} finally {
group.shutdownGracefully();
group.terminationFuture().sync();
}
}
@Test
public void testLateRegisterSuccessBindFailed() throws Exception {
TestEventLoopGroup group = new TestEventLoopGroup();
try {
ServerBootstrap bootstrap = new ServerBootstrap();
bootstrap.group(group);
bootstrap.channelFactory(new ChannelFactory<ServerChannel>() {
@Override
public ServerChannel newChannel() {
return new LocalServerChannel() {
@Override
public ChannelFuture bind(SocketAddress localAddress) {
// Close the Channel to emulate what NIO and others impl do on bind failure
// See https://github.com/netty/netty/issues/2586
close();
return newFailedFuture(new SocketException());
}
@Override
public ChannelFuture bind(SocketAddress localAddress, ChannelPromise promise) {
// Close the Channel to emulate what NIO and others impl do on bind failure
// See https://github.com/netty/netty/issues/2586
close();
return promise.setFailure(new SocketException());
}
};
}
});
bootstrap.childHandler(new DummyHandler());
bootstrap.localAddress(new LocalAddress("1"));
ChannelFuture future = bootstrap.bind();
assertFalse(future.isDone());
group.promise.setSuccess();
final BlockingQueue<Boolean> queue = new LinkedBlockingQueue<Boolean>();
future.addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
queue.add(future.channel().eventLoop().inEventLoop(Thread.currentThread()));
queue.add(future.isSuccess());
}
});
assertTrue(queue.take());
assertFalse(queue.take());
} finally {
group.shutdownGracefully();
group.terminationFuture().sync();
}
}
@Test
public void testAsyncResolutionSuccess() throws Exception {
final Bootstrap bootstrapA = new Bootstrap();
bootstrapA.group(groupA);
bootstrapA.channel(LocalChannel.class);
bootstrapA.resolver(new TestNameResolverGroup(true));
bootstrapA.handler(dummyHandler);
final ServerBootstrap bootstrapB = new ServerBootstrap();
bootstrapB.group(groupB);
bootstrapB.channel(LocalServerChannel.class);
bootstrapB.childHandler(dummyHandler);
SocketAddress localAddress = bootstrapB.bind(LocalAddress.ANY).sync().channel().localAddress();
// Connect to the server using the asynchronous resolver.
bootstrapA.connect(localAddress).sync();
}
@Test
public void testAsyncResolutionFailure() throws Exception {
final Bootstrap bootstrapA = new Bootstrap();
bootstrapA.group(groupA);
bootstrapA.channel(LocalChannel.class);
bootstrapA.resolver(new TestNameResolverGroup(false));
bootstrapA.handler(dummyHandler);
final ServerBootstrap bootstrapB = new ServerBootstrap();
bootstrapB.group(groupB);
bootstrapB.channel(LocalServerChannel.class);
bootstrapB.childHandler(dummyHandler);
SocketAddress localAddress = bootstrapB.bind(LocalAddress.ANY).sync().channel().localAddress();
// Connect to the server using the asynchronous resolver.
ChannelFuture connectFuture = bootstrapA.connect(localAddress);
// Should fail with the UnknownHostException.
assertThat(connectFuture.await(10000), is(true));
assertThat(connectFuture.cause(), is(instanceOf(UnknownHostException.class)));
assertThat(connectFuture.channel().isOpen(), is(false));
}
private static final class TestEventLoopGroup extends DefaultEventLoopGroup {
ChannelPromise promise;
TestEventLoopGroup() {
super(1);
}
@Override
public ChannelFuture register(Channel channel) {
super.register(channel).syncUninterruptibly();
promise = channel.newPromise();
return promise;
}
@Override
public ChannelFuture register(Channel channel, final ChannelPromise promise) {
throw new UnsupportedOperationException();
}
}
@Sharable
private static final class DummyHandler extends ChannelHandlerAdapter { }
private static final class TestNameResolverGroup extends NameResolverGroup<SocketAddress> {
private final boolean success;
TestNameResolverGroup(boolean success) {
this.success = success;
}
@Override
protected NameResolver<SocketAddress> newResolver(EventExecutor executor) throws Exception {
return new SimpleNameResolver<SocketAddress>(executor) {
@Override
protected boolean doIsResolved(SocketAddress address) {
return false;
}
@Override
protected void doResolve(
final SocketAddress unresolvedAddress, final Promise<SocketAddress> promise) {
executor().execute(new Runnable() {
@Override
public void run() {
if (success) {
promise.setSuccess(unresolvedAddress);
} else {
promise.setFailure(new UnknownHostException());
}
}
});
}
};
}
}
}