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ActiveMQScheduledComponentTest.java
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ActiveMQScheduledComponentTest.java
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/**
* 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.activemq.artemis.utils;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.activemq.artemis.core.server.ActiveMQScheduledComponent;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
public class ActiveMQScheduledComponentTest {
@Rule
public ThreadLeakCheckRule rule = new ThreadLeakCheckRule();
ScheduledExecutorService scheduledExecutorService;
ExecutorService executorService;
@Before
public void before() {
scheduledExecutorService = new ScheduledThreadPoolExecutor(5);
executorService = Executors.newSingleThreadExecutor();
}
@After
public void after() {
executorService.shutdown();
scheduledExecutorService.shutdown();
}
@Test
public void testAccumulation() throws Exception {
final AtomicInteger count = new AtomicInteger(0);
final ActiveMQScheduledComponent local = new ActiveMQScheduledComponent(scheduledExecutorService, executorService, 100, TimeUnit.MILLISECONDS, false) {
@Override
public void run() {
if (count.get() == 0) {
try {
Thread.sleep(800);
} catch (Exception e) {
}
}
count.incrementAndGet();
}
};
local.start();
Thread.sleep(1000);
local.stop();
Assert.assertTrue("just because one took a lot of time, it doesn't mean we can accumulate many, we got " + count + " executions", count.get() < 5);
}
@Test
public void testVerifyInitialDelayChanged() {
final long initialDelay = 10;
final long period = 100;
final ActiveMQScheduledComponent local = new ActiveMQScheduledComponent(scheduledExecutorService, executorService, initialDelay, period, TimeUnit.MILLISECONDS, false) {
@Override
public void run() {
}
};
local.start();
final long newInitialDelay = 1000;
//the parameters are valid?
assert initialDelay != newInitialDelay && newInitialDelay != period;
local.setInitialDelay(newInitialDelay);
local.stop();
Assert.assertEquals("the initial dalay can't change", newInitialDelay, local.getInitialDelay());
}
@Test
public void testAccumulationOwnPool() throws Exception {
final AtomicInteger count = new AtomicInteger(0);
final ActiveMQScheduledComponent local = new ActiveMQScheduledComponent(100, TimeUnit.MILLISECONDS, false) {
@Override
public void run() {
if (count.get() == 0) {
try {
Thread.sleep(500);
} catch (Exception e) {
}
}
count.incrementAndGet();
}
};
local.start();
Thread.sleep(1000);
local.stop();
Assert.assertTrue("just because one took a lot of time, it doesn't mean we can accumulate many, we got " + count + " executions", count.get() <= 5 && count.get() > 0);
}
@Test
public void testUsingOwnExecutors() throws Exception {
final CountDownLatch latch = new CountDownLatch(1);
final ActiveMQScheduledComponent local = new ActiveMQScheduledComponent(10, TimeUnit.MILLISECONDS, false) {
@Override
public void run() {
latch.countDown();
}
};
local.start();
local.start(); // should be ok to call start again
try {
Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
// re-scheduling the executor at a big interval..
// just to make sure it won't hung
local.setTimeUnit(TimeUnit.HOURS);
local.setPeriod(1);
} finally {
local.stop();
local.stop(); // should be ok to call stop again
}
}
@Test
public void testUsingOwnExecutorsOnDemand() throws Throwable {
final ReusableLatch latch = new ReusableLatch(1);
final ActiveMQScheduledComponent local = new ActiveMQScheduledComponent(10, TimeUnit.MILLISECONDS, true) {
@Override
public void run() {
latch.countDown();
}
};
local.start();
local.start(); // should be ok to call start again
try {
Assert.assertFalse(latch.await(20, TimeUnit.MILLISECONDS));
local.delay();
Assert.assertTrue(latch.await(20, TimeUnit.MILLISECONDS));
latch.setCount(1);
Assert.assertFalse(latch.await(20, TimeUnit.MILLISECONDS));
// re-scheduling the executor at a big interval..
// just to make sure it won't hung
local.setTimeUnit(TimeUnit.HOURS);
local.setPeriod(1);
} finally {
local.stop();
local.stop(); // calling stop again should not be an issue.
}
}
@Test
public void testUsingCustomInitialDelay() throws InterruptedException {
final CountDownLatch latch = new CountDownLatch(1);
final long initialDelayMillis = 100;
final long checkPeriodMillis = 100 * initialDelayMillis;
final ActiveMQScheduledComponent local = new ActiveMQScheduledComponent(scheduledExecutorService, executorService, initialDelayMillis, checkPeriodMillis, TimeUnit.MILLISECONDS, false) {
@Override
public void run() {
latch.countDown();
}
};
final long start = System.nanoTime();
local.start();
try {
final boolean triggeredBeforePeriod = latch.await(local.getPeriod(), local.getTimeUnit());
final long timeToFirstTrigger = TimeUnit.NANOSECONDS.convert(System.nanoTime() - start, local.getTimeUnit());
Assert.assertTrue("Takes too long to start", triggeredBeforePeriod);
Assert.assertTrue("Started too early", timeToFirstTrigger >= local.getInitialDelay());
} finally {
local.stop();
}
}
}