159 lines
5.8 KiB
Java
159 lines
5.8 KiB
Java
/*
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* Copyright 2016 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.util.concurrent;
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import io.netty.util.NettyRuntime;
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import org.junit.Assert;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.Parameterized;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.atomic.AtomicReference;
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@RunWith(Parameterized.class)
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public class NonStickyEventExecutorGroupTest {
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private final int maxTaskExecutePerRun;
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@Test(expected = IllegalArgumentException.class)
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public void testInvalidGroup() {
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EventExecutorGroup group = new DefaultEventExecutorGroup(1);
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try {
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new NonStickyEventExecutorGroup(group);
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} finally {
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group.shutdownGracefully();
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}
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}
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@Parameterized.Parameters(name = "{index}: maxTaskExecutePerRun = {0}")
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public static Collection<Object[]> data() throws Exception {
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List<Object[]> params = new ArrayList<>();
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params.add(new Object[] {64});
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params.add(new Object[] {256});
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params.add(new Object[] {1024});
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params.add(new Object[] {Integer.MAX_VALUE});
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return params;
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}
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public NonStickyEventExecutorGroupTest(int maxTaskExecutePerRun) {
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this.maxTaskExecutePerRun = maxTaskExecutePerRun;
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}
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@Test(timeout = 10000)
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public void testOrdering() throws Throwable {
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final int threads = NettyRuntime.availableProcessors() * 2;
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final EventExecutorGroup group = new UnorderedThreadPoolEventExecutor(threads);
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final NonStickyEventExecutorGroup nonStickyGroup = new NonStickyEventExecutorGroup(group, maxTaskExecutePerRun);
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try {
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final CountDownLatch startLatch = new CountDownLatch(1);
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final AtomicReference<Throwable> error = new AtomicReference<>();
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List<Thread> threadList = new ArrayList<>(threads);
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for (int i = 0 ; i < threads; i++) {
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Thread thread = new Thread(() -> {
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try {
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execute(nonStickyGroup, startLatch);
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} catch (Throwable cause) {
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error.compareAndSet(null, cause);
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}
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});
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threadList.add(thread);
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thread.start();
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}
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startLatch.countDown();
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for (Thread t: threadList) {
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t.join();
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}
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Throwable cause = error.get();
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if (cause != null) {
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throw cause;
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}
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} finally {
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nonStickyGroup.shutdownGracefully();
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}
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}
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@Test
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public void testRaceCondition() throws InterruptedException {
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EventExecutorGroup group = new UnorderedThreadPoolEventExecutor(1);
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NonStickyEventExecutorGroup nonStickyGroup = new NonStickyEventExecutorGroup(group, maxTaskExecutePerRun);
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try {
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EventExecutor executor = nonStickyGroup.next();
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for (int j = 0; j < 5000; j++) {
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final CountDownLatch firstCompleted = new CountDownLatch(1);
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final CountDownLatch latch = new CountDownLatch(2);
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for (int i = 0; i < 2; i++) {
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executor.execute(() -> {
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firstCompleted.countDown();
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latch.countDown();
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});
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Assert.assertTrue(firstCompleted.await(1, TimeUnit.SECONDS));
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}
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Assert.assertTrue(latch.await(5, TimeUnit.SECONDS));
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}
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} finally {
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nonStickyGroup.shutdownGracefully();
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}
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}
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private static void execute(EventExecutorGroup group, CountDownLatch startLatch) throws Throwable {
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EventExecutor executor = group.next();
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Assert.assertTrue(executor instanceof OrderedEventExecutor);
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final AtomicReference<Throwable> cause = new AtomicReference<>();
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final AtomicInteger last = new AtomicInteger();
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int tasks = 10000;
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List<Future<?>> futures = new ArrayList<>(tasks);
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final CountDownLatch latch = new CountDownLatch(tasks);
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startLatch.await();
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for (int i = 1 ; i <= tasks; i++) {
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final int id = i;
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futures.add(executor.submit(() -> {
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try {
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if (cause.get() == null) {
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int lastId = last.get();
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if (lastId >= id) {
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cause.compareAndSet(null, new AssertionError(
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"Out of order execution id(" + id + ") >= lastId(" + lastId + ')'));
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}
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if (!last.compareAndSet(lastId, id)) {
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cause.compareAndSet(null, new AssertionError("Concurrent execution of tasks"));
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}
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}
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} finally {
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latch.countDown();
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}
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}));
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}
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latch.await();
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for (Future<?> future: futures) {
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future.syncUninterruptibly();
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}
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Throwable error = cause.get();
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if (error != null) {
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throw error;
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}
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}
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}
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