Motivation: Sometimes it is desirable to be able to use a different Queue implementation for the EventLoop of a Channel. This is currently not possible without resort to reflection. Modifications: - Add a new constructor to Nio|Epoll|KQueueEventLoopGroup which allows to specify a factory which is used to create the task queue. This was the user can override the default implementation. - Add test Result: Be able to change Queue that is used for the EventLoop.
324 lines
11 KiB
Java
324 lines
11 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.nio;
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import io.netty.channel.AbstractEventLoopTest;
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import io.netty.channel.Channel;
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import io.netty.channel.DefaultSelectStrategyFactory;
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import io.netty.channel.EventLoop;
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import io.netty.channel.EventLoopGroup;
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import io.netty.channel.MultithreadEventLoopGroup;
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import io.netty.channel.SelectStrategy;
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import io.netty.channel.SelectStrategyFactory;
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import io.netty.channel.socket.ServerSocketChannel;
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import io.netty.channel.socket.nio.NioServerSocketChannel;
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import io.netty.util.IntSupplier;
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import io.netty.util.concurrent.DefaultEventExecutorChooserFactory;
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import io.netty.util.concurrent.DefaultThreadFactory;
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import io.netty.util.concurrent.Future;
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import io.netty.util.concurrent.RejectedExecutionHandlers;
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import io.netty.util.concurrent.ThreadPerTaskExecutor;
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import org.hamcrest.core.IsInstanceOf;
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import org.junit.Ignore;
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import org.junit.Test;
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import java.io.IOException;
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import java.net.InetSocketAddress;
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import java.nio.channels.SelectionKey;
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import java.nio.channels.Selector;
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import java.nio.channels.SocketChannel;
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import java.nio.channels.spi.SelectorProvider;
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import java.util.Queue;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.RejectedExecutionException;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.atomic.AtomicReference;
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import static org.junit.Assert.*;
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public class NioEventLoopTest extends AbstractEventLoopTest {
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@Override
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protected EventLoopGroup newEventLoopGroup() {
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return new NioEventLoopGroup();
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}
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@Override
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protected Class<? extends ServerSocketChannel> newChannel() {
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return NioServerSocketChannel.class;
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}
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@Test
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public void testRebuildSelector() {
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EventLoopGroup group = new NioEventLoopGroup(1);
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final NioEventLoop loop = (NioEventLoop) group.next();
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try {
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Channel channel = new NioServerSocketChannel();
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loop.register(channel).syncUninterruptibly();
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Selector selector = loop.unwrappedSelector();
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assertSame(selector, ((NioEventLoop) channel.eventLoop()).unwrappedSelector());
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assertTrue(selector.isOpen());
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// Submit to the EventLoop so we are sure its really executed in a non-async manner.
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loop.submit(new Runnable() {
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@Override
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public void run() {
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loop.rebuildSelector();
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}
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}).syncUninterruptibly();
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Selector newSelector = ((NioEventLoop) channel.eventLoop()).unwrappedSelector();
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assertTrue(newSelector.isOpen());
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assertNotSame(selector, newSelector);
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assertFalse(selector.isOpen());
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channel.close().syncUninterruptibly();
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} finally {
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group.shutdownGracefully();
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}
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}
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@Test
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public void testScheduleBigDelayNotOverflow() {
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EventLoopGroup group = new NioEventLoopGroup(1);
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final EventLoop el = group.next();
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Future<?> future = el.schedule(new Runnable() {
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@Override
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public void run() {
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// NOOP
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}
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}, Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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assertFalse(future.awaitUninterruptibly(1000));
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assertTrue(future.cancel(true));
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group.shutdownGracefully();
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}
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@Test
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public void testInterruptEventLoopThread() throws Exception {
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EventLoopGroup group = new NioEventLoopGroup(1);
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final NioEventLoop loop = (NioEventLoop) group.next();
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try {
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Selector selector = loop.unwrappedSelector();
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assertTrue(selector.isOpen());
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loop.submit(new Runnable() {
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@Override
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public void run() {
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// Interrupt the thread which should not end-up in a busy spin and
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// so the selector should not have been rebuild.
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Thread.currentThread().interrupt();
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}
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}).syncUninterruptibly();
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assertTrue(selector.isOpen());
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final CountDownLatch latch = new CountDownLatch(2);
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loop.submit(new Runnable() {
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@Override
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public void run() {
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latch.countDown();
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}
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}).syncUninterruptibly();
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loop.schedule(new Runnable() {
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@Override
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public void run() {
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latch.countDown();
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}
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}, 2, TimeUnit.SECONDS).syncUninterruptibly();
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latch.await();
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assertSame(selector, loop.unwrappedSelector());
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assertTrue(selector.isOpen());
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} finally {
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group.shutdownGracefully();
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}
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}
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@Test(timeout = 3000)
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public void testSelectableChannel() throws Exception {
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NioEventLoopGroup group = new NioEventLoopGroup(1);
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NioEventLoop loop = (NioEventLoop) group.next();
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try {
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Channel channel = new NioServerSocketChannel();
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loop.register(channel).syncUninterruptibly();
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channel.bind(new InetSocketAddress(0)).syncUninterruptibly();
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SocketChannel selectableChannel = SocketChannel.open();
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selectableChannel.configureBlocking(false);
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selectableChannel.connect(channel.localAddress());
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final CountDownLatch latch = new CountDownLatch(1);
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loop.register(selectableChannel, SelectionKey.OP_CONNECT, new NioTask<SocketChannel>() {
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@Override
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public void channelReady(SocketChannel ch, SelectionKey key) {
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latch.countDown();
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}
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@Override
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public void channelUnregistered(SocketChannel ch, Throwable cause) {
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}
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});
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latch.await();
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selectableChannel.close();
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channel.close().syncUninterruptibly();
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} finally {
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group.shutdownGracefully();
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}
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}
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@SuppressWarnings("deprecation")
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@Test
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public void testTaskRemovalOnShutdownThrowsNoUnsupportedOperationException() throws Exception {
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final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
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final Runnable task = new Runnable() {
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@Override
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public void run() {
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// NOOP
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}
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};
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// Just run often enough to trigger it normally.
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for (int i = 0; i < 1000; i++) {
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NioEventLoopGroup group = new NioEventLoopGroup(1);
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final NioEventLoop loop = (NioEventLoop) group.next();
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Thread t = new Thread(new Runnable() {
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@Override
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public void run() {
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try {
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for (;;) {
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loop.execute(task);
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}
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} catch (Throwable cause) {
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error.set(cause);
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}
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}
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});
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t.start();
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group.shutdownNow();
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t.join();
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group.terminationFuture().syncUninterruptibly();
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assertThat(error.get(), IsInstanceOf.instanceOf(RejectedExecutionException.class));
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error.set(null);
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}
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}
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@Test
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public void testRebuildSelectorOnIOException() {
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SelectStrategyFactory selectStrategyFactory = new SelectStrategyFactory() {
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@Override
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public SelectStrategy newSelectStrategy() {
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return new SelectStrategy() {
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private boolean thrown;
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@Override
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public int calculateStrategy(IntSupplier selectSupplier, boolean hasTasks) throws Exception {
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if (!thrown) {
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thrown = true;
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throw new IOException();
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}
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return -1;
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}
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};
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}
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};
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EventLoopGroup group = new NioEventLoopGroup(1, new DefaultThreadFactory("ioPool"),
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SelectorProvider.provider(), selectStrategyFactory);
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final NioEventLoop loop = (NioEventLoop) group.next();
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try {
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Channel channel = new NioServerSocketChannel();
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Selector selector = loop.unwrappedSelector();
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loop.register(channel).syncUninterruptibly();
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Selector newSelector = ((NioEventLoop) channel.eventLoop()).unwrappedSelector();
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assertTrue(newSelector.isOpen());
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assertNotSame(selector, newSelector);
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assertFalse(selector.isOpen());
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channel.close().syncUninterruptibly();
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} finally {
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group.shutdownGracefully();
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}
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}
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@Ignore
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@Test
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public void testChannelsRegistered() {
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NioEventLoopGroup group = new NioEventLoopGroup(1);
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final NioEventLoop loop = (NioEventLoop) group.next();
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try {
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final Channel ch1 = new NioServerSocketChannel();
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final Channel ch2 = new NioServerSocketChannel();
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assertEquals(0, loop.registeredChannels());
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assertTrue(loop.register(ch1).syncUninterruptibly().isSuccess());
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assertTrue(loop.register(ch2).syncUninterruptibly().isSuccess());
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assertEquals(2, loop.registeredChannels());
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assertTrue(ch1.deregister().syncUninterruptibly().isSuccess());
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assertEquals(1, loop.registeredChannels());
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} finally {
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group.shutdownGracefully();
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}
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}
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@Test
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public void testCustomQueue() {
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final AtomicBoolean called = new AtomicBoolean();
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NioEventLoopGroup group = new NioEventLoopGroup(1,
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new ThreadPerTaskExecutor(new DefaultThreadFactory(NioEventLoopGroup.class)),
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DefaultEventExecutorChooserFactory.INSTANCE, SelectorProvider.provider(),
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DefaultSelectStrategyFactory.INSTANCE, RejectedExecutionHandlers.reject(),
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new MultithreadEventLoopGroup.EventLoopTaskQueueFactory() {
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@Override
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public Queue<Runnable> newTaskQueue(int maxCapacity) {
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called.set(true);
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return new LinkedBlockingQueue<Runnable>(maxCapacity);
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}
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});
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final NioEventLoop loop = (NioEventLoop) group.next();
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try {
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loop.submit(new Runnable() {
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@Override
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public void run() {
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// NOOP.
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}
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}).syncUninterruptibly();
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assertTrue(called.get());
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} finally {
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group.shutdownGracefully();
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}
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}
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}
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