| /* |
| * 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.accumulo.server.util.time; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertSame; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class SimpleTimerTest { |
| private static final long DELAY = 1000L; |
| private static final long PERIOD = 2000L; |
| private static final long PAD = 100L; |
| private SimpleTimer t; |
| |
| @Before |
| public void setUp() { |
| t = SimpleTimer.getInstance(null); |
| } |
| |
| private static class Incrementer implements Runnable { |
| private final AtomicInteger i; |
| private volatile boolean canceled; |
| |
| Incrementer(AtomicInteger i) { |
| this.i = i; |
| canceled = false; |
| } |
| |
| @Override |
| public void run() { |
| if (canceled) { |
| return; |
| } |
| i.incrementAndGet(); |
| } |
| |
| public void cancel() { |
| canceled = true; |
| } |
| } |
| |
| private static class Thrower implements Runnable { |
| boolean wasRun = false; |
| |
| @Override |
| public void run() { |
| wasRun = true; |
| throw new IllegalStateException("You shall not pass"); |
| } |
| } |
| |
| @Test(timeout = 5000) |
| public void testOneTimeSchedule() throws InterruptedException { |
| AtomicInteger i = new AtomicInteger(); |
| Incrementer r = new Incrementer(i); |
| t.schedule(r, DELAY); |
| Thread.sleep(DELAY + PAD); |
| while (i.get() != 1) { |
| Thread.sleep(PAD); |
| } |
| r.cancel(); |
| } |
| |
| @Test(timeout = 10000) |
| public void testFixedDelaySchedule() throws InterruptedException { |
| AtomicInteger i = new AtomicInteger(); |
| Incrementer r = new Incrementer(i); |
| t.schedule(r, DELAY, PERIOD); |
| Thread.sleep(DELAY + (2 * PERIOD) + PAD); |
| while (i.get() != 3) { |
| Thread.sleep(PAD); |
| } |
| r.cancel(); |
| } |
| |
| @Test(timeout = 5000) |
| public void testFailure() throws InterruptedException { |
| Thrower r = new Thrower(); |
| t.schedule(r, DELAY); |
| Thread.sleep(DELAY + PAD); |
| while (!r.wasRun) { |
| Thread.sleep(PAD); |
| } |
| } |
| |
| @Test(timeout = 5000) |
| public void testSingleton() { |
| assertEquals(1, SimpleTimer.getInstanceThreadPoolSize()); |
| SimpleTimer t2 = SimpleTimer.getInstance(2); |
| assertSame(t, t2); |
| assertEquals(1, SimpleTimer.getInstanceThreadPoolSize()); // unchanged |
| } |
| } |