package org.apache.cassandra.concurrent; /* * * 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. * */ import org.apache.cassandra.utils.concurrent.WaitQueue; import org.junit.*; import java.util.concurrent.atomic.AtomicBoolean; import static org.junit.Assert.*; public class WaitQueueTest { @Test public void testSerial() throws InterruptedException { testSerial(new WaitQueue()); } public void testSerial(final WaitQueue queue) throws InterruptedException { Thread[] ts = new Thread[4]; for (int i = 0 ; i < ts.length ; i++) ts[i] = new Thread(new Runnable() { @Override public void run() { WaitQueue.Signal wait = queue.register(); try { wait.await(); } catch (InterruptedException e) { e.printStackTrace(); } } }); for (int i = 0 ; i < ts.length ; i++) ts[i].start(); Thread.sleep(100); queue.signal(); queue.signal(); queue.signal(); queue.signal(); for (int i = 0 ; i < ts.length ; i++) { ts[i].join(100); assertFalse(queue.getClass().getName(), ts[i].isAlive()); } } @Test public void testCondition1() throws InterruptedException { testCondition1(new WaitQueue()); } public void testCondition1(final WaitQueue queue) throws InterruptedException { final AtomicBoolean cond1 = new AtomicBoolean(false); final AtomicBoolean fail = new AtomicBoolean(false); Thread t1 = new Thread(new Runnable() { @Override public void run() { try { Thread.sleep(200); } catch (InterruptedException e) { e.printStackTrace(); } WaitQueue.Signal wait = queue.register(); if (!cond1.get()) { System.err.println("Condition should have already been met"); fail.set(true); } } }); t1.start(); Thread.sleep(50); cond1.set(true); Thread.sleep(300); queue.signal(); t1.join(300); assertFalse(queue.getClass().getName(), t1.isAlive()); assertFalse(fail.get()); } @Test public void testCondition2() throws InterruptedException { testCondition2(new WaitQueue()); } public void testCondition2(final WaitQueue queue) throws InterruptedException { final AtomicBoolean condition = new AtomicBoolean(false); final AtomicBoolean fail = new AtomicBoolean(false); Thread t = new Thread(new Runnable() { @Override public void run() { WaitQueue.Signal wait = queue.register(); if (condition.get()) { System.err.println(""); fail.set(true); } try { Thread.sleep(200); wait.await(); } catch (InterruptedException e) { e.printStackTrace(); } if (!condition.get()) { System.err.println("Woke up when condition not met"); fail.set(true); } } }); t.start(); Thread.sleep(50); condition.set(true); queue.signal(); t.join(300); assertFalse(queue.getClass().getName(), t.isAlive()); assertFalse(fail.get()); } }