// 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 com.cloud.utils.db;
import org.apache.log4j.Logger;
import junit.framework.Assert;
import com.cloud.utils.Profiler;
import com.cloud.utils.testcase.Log4jEnabledTestCase;
public class GlobalLockTest extends Log4jEnabledTestCase{
public static final Logger s_logger = Logger.getLogger(GlobalLockTest.class);
private final static GlobalLock _workLock = GlobalLock.getInternLock("SecurityGroupWork");
public static class Worker implements Runnable {
int id = 0;
int timeoutSeconds = 10;
int jobDuration = 2;
public Worker(int id, int timeout, int duration) {
this.id = id;
timeoutSeconds = timeout;
jobDuration = duration;
}
public void run() {
boolean locked = false;
try {
Profiler p = new Profiler();
p.start();
locked = _workLock.lock(timeoutSeconds);
p.stop();
System.out.println("Thread " + id + " waited " + p.getDuration() + " ms, locked=" + locked);
if (locked) {
Thread.sleep(jobDuration*1000);
}
} catch (InterruptedException e) {
} finally {
if (locked) {
boolean unlocked = _workLock.unlock();
System.out.println("Thread " + id + " unlocked=" + unlocked);
}
}
}
}
public void testTimeout() {
Thread [] pool = new Thread[50];
for (int i=0; i < pool.length; i++) {
pool[i] = new Thread(new Worker(i, 5, 3));
}
for (int i=0; i < pool.length; i++) {
pool[i].start();
}
for (int i=0; i < pool.length; i++) {
try {
pool[i].join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}