| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 org.apache.hadoop.net.unix; |
| |
| import static org.junit.Assert.assertFalse; |
| |
| import java.util.ArrayList; |
| import java.util.Random; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.locks.ReentrantLock; |
| |
| import org.junit.After; |
| import org.junit.Assume; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import com.google.common.util.concurrent.Uninterruptibles; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class TestDomainSocketWatcher { |
| static final Logger LOG = |
| LoggerFactory.getLogger(TestDomainSocketWatcher.class); |
| |
| private Throwable trappedException = null; |
| |
| @Before |
| public void before() { |
| Assume.assumeTrue(DomainSocket.getLoadingFailureReason() == null); |
| } |
| |
| @After |
| public void after() { |
| if (trappedException != null) { |
| throw new IllegalStateException( |
| "DomainSocketWatcher thread terminated with unexpected exception.", |
| trappedException); |
| } |
| } |
| |
| /** |
| * Test that we can create a DomainSocketWatcher and then shut it down. |
| */ |
| @Test(timeout=60000) |
| public void testCreateShutdown() throws Exception { |
| DomainSocketWatcher watcher = newDomainSocketWatcher(10000000); |
| watcher.close(); |
| } |
| |
| /** |
| * Test that we can get notifications out a DomainSocketWatcher. |
| */ |
| @Test(timeout=180000) |
| public void testDeliverNotifications() throws Exception { |
| DomainSocketWatcher watcher = newDomainSocketWatcher(10000000); |
| DomainSocket pair[] = DomainSocket.socketpair(); |
| final CountDownLatch latch = new CountDownLatch(1); |
| watcher.add(pair[1], new DomainSocketWatcher.Handler() { |
| @Override |
| public boolean handle(DomainSocket sock) { |
| latch.countDown(); |
| return true; |
| } |
| }); |
| pair[0].close(); |
| latch.await(); |
| watcher.close(); |
| } |
| |
| /** |
| * Test that a java interruption can stop the watcher thread |
| */ |
| @Test(timeout=60000) |
| public void testInterruption() throws Exception { |
| final DomainSocketWatcher watcher = newDomainSocketWatcher(10); |
| watcher.watcherThread.interrupt(); |
| Uninterruptibles.joinUninterruptibly(watcher.watcherThread); |
| watcher.close(); |
| } |
| |
| /** |
| * Test that domain sockets are closed when the watcher is closed. |
| */ |
| @Test(timeout=300000) |
| public void testCloseSocketOnWatcherClose() throws Exception { |
| final DomainSocketWatcher watcher = newDomainSocketWatcher(10000000); |
| DomainSocket pair[] = DomainSocket.socketpair(); |
| watcher.add(pair[1], new DomainSocketWatcher.Handler() { |
| @Override |
| public boolean handle(DomainSocket sock) { |
| return true; |
| } |
| }); |
| watcher.close(); |
| Uninterruptibles.joinUninterruptibly(watcher.watcherThread); |
| assertFalse(pair[1].isOpen()); |
| } |
| |
| @Test(timeout=300000) |
| public void testStress() throws Exception { |
| final int SOCKET_NUM = 250; |
| final ReentrantLock lock = new ReentrantLock(); |
| final DomainSocketWatcher watcher = newDomainSocketWatcher(10000000); |
| final ArrayList<DomainSocket[]> pairs = new ArrayList<DomainSocket[]>(); |
| final AtomicInteger handled = new AtomicInteger(0); |
| |
| final Thread adderThread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| for (int i = 0; i < SOCKET_NUM; i++) { |
| DomainSocket pair[] = DomainSocket.socketpair(); |
| watcher.add(pair[1], new DomainSocketWatcher.Handler() { |
| @Override |
| public boolean handle(DomainSocket sock) { |
| handled.incrementAndGet(); |
| return true; |
| } |
| }); |
| lock.lock(); |
| try { |
| pairs.add(pair); |
| } finally { |
| lock.unlock(); |
| } |
| } |
| } catch (Throwable e) { |
| LOG.error(e.toString()); |
| throw new RuntimeException(e); |
| } |
| } |
| }); |
| |
| final Thread removerThread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| final Random random = new Random(); |
| try { |
| while (handled.get() != SOCKET_NUM) { |
| lock.lock(); |
| try { |
| if (!pairs.isEmpty()) { |
| int idx = random.nextInt(pairs.size()); |
| DomainSocket pair[] = pairs.remove(idx); |
| if (random.nextBoolean()) { |
| pair[0].close(); |
| } else { |
| watcher.remove(pair[1]); |
| } |
| } |
| } finally { |
| lock.unlock(); |
| } |
| } |
| } catch (Throwable e) { |
| LOG.error(e.toString()); |
| throw new RuntimeException(e); |
| } |
| } |
| }); |
| |
| adderThread.start(); |
| removerThread.start(); |
| Uninterruptibles.joinUninterruptibly(adderThread); |
| Uninterruptibles.joinUninterruptibly(removerThread); |
| watcher.close(); |
| } |
| |
| @Test(timeout = 300000) |
| public void testStressInterruption() throws Exception { |
| final int SOCKET_NUM = 250; |
| final ReentrantLock lock = new ReentrantLock(); |
| final DomainSocketWatcher watcher = newDomainSocketWatcher(10); |
| final ArrayList<DomainSocket[]> pairs = new ArrayList<DomainSocket[]>(); |
| final AtomicInteger handled = new AtomicInteger(0); |
| |
| final Thread adderThread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| for (int i = 0; i < SOCKET_NUM; i++) { |
| DomainSocket pair[] = DomainSocket.socketpair(); |
| watcher.add(pair[1], new DomainSocketWatcher.Handler() { |
| @Override |
| public boolean handle(DomainSocket sock) { |
| handled.incrementAndGet(); |
| return true; |
| } |
| }); |
| lock.lock(); |
| try { |
| pairs.add(pair); |
| } finally { |
| lock.unlock(); |
| } |
| TimeUnit.MILLISECONDS.sleep(1); |
| } |
| } catch (Throwable e) { |
| LOG.error(e.toString()); |
| throw new RuntimeException(e); |
| } |
| } |
| }); |
| |
| final Thread removerThread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| final Random random = new Random(); |
| try { |
| while (handled.get() != SOCKET_NUM) { |
| lock.lock(); |
| try { |
| if (!pairs.isEmpty()) { |
| int idx = random.nextInt(pairs.size()); |
| DomainSocket pair[] = pairs.remove(idx); |
| if (random.nextBoolean()) { |
| pair[0].close(); |
| } else { |
| watcher.remove(pair[1]); |
| } |
| TimeUnit.MILLISECONDS.sleep(1); |
| } |
| } finally { |
| lock.unlock(); |
| } |
| } |
| } catch (Throwable e) { |
| LOG.error(e.toString()); |
| throw new RuntimeException(e); |
| } |
| } |
| }); |
| |
| adderThread.start(); |
| removerThread.start(); |
| TimeUnit.MILLISECONDS.sleep(100); |
| watcher.watcherThread.interrupt(); |
| Uninterruptibles.joinUninterruptibly(adderThread); |
| Uninterruptibles.joinUninterruptibly(removerThread); |
| Uninterruptibles.joinUninterruptibly(watcher.watcherThread); |
| } |
| |
| /** |
| * Creates a new DomainSocketWatcher and tracks its thread for termination due |
| * to an unexpected exception. At the end of each test, if there was an |
| * unexpected exception, then that exception is thrown to force a failure of |
| * the test. |
| * |
| * @param interruptCheckPeriodMs interrupt check period passed to |
| * DomainSocketWatcher |
| * @return new DomainSocketWatcher |
| * @throws Exception if there is any failure |
| */ |
| private DomainSocketWatcher newDomainSocketWatcher(int interruptCheckPeriodMs) |
| throws Exception { |
| DomainSocketWatcher watcher = new DomainSocketWatcher( |
| interruptCheckPeriodMs, getClass().getSimpleName()); |
| watcher.watcherThread.setUncaughtExceptionHandler( |
| new Thread.UncaughtExceptionHandler() { |
| @Override |
| public void uncaughtException(Thread thread, Throwable t) { |
| trappedException = t; |
| } |
| }); |
| return watcher; |
| } |
| } |