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());
}
}