/*
* 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.tests.extras.byteman;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import org.apache.activemq.artemis.core.settings.impl.HierarchicalObjectRepository;
import org.apache.activemq.artemis.utils.ActiveMQThreadFactory;
import org.jboss.byteman.contrib.bmunit.BMRule;
import org.jboss.byteman.contrib.bmunit.BMRules;
import org.jboss.byteman.contrib.bmunit.BMUnitRunner;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(BMUnitRunner.class)
@BMRules(rules = {@BMRule(name = "modify map during iteration",
targetClass = "org.apache.activemq.artemis.core.settings.impl.HierarchicalObjectRepository",
targetMethod = "getPossibleMatches(String)", targetLocation = "AT INVOKE java.util.HashMap.put",
action = "org.apache.activemq.artemis.tests.extras.byteman.HierarchicalObjectRepositoryTest.bum()"),})
public class HierarchicalObjectRepositoryTest {
private static final String A = "a.";
private static final int TOTAL = 100;
private static CountDownLatch latch;
private static CountDownLatch latch2;
private ExecutorService executor;
private HierarchicalObjectRepository<String> repo;
@Before
public void setUp() {
latch = new CountDownLatch(1);
latch2 = new CountDownLatch(1);
executor = Executors.newSingleThreadExecutor(ActiveMQThreadFactory.defaultThreadFactory());
repo = new HierarchicalObjectRepository<>();
addToRepo(repo, A);
}
static void addToRepo(HierarchicalObjectRepository<String> repo0, String pattern) {
for (int i = 0; i < TOTAL; i++) {
repo0.addMatch(pattern + i + ".*", String.valueOf(i));
}
}
@After
public void tearDown() throws InterruptedException {
latch.countDown();
latch2.countDown();
executor.shutdown();
executor.awaitTermination(1, TimeUnit.SECONDS);
}
private class Clearer implements Runnable {
private final int code;
private Clearer(int code) {
this.code = code;
}
@Override
public void run() {
try {
latch.await();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
switch (code) {
case 0:
repo.clear();
break;
case 1:
addToRepo(repo, "bb.");
break;
case 2:
for (int i = TOTAL / 2; i < TOTAL; i++) {
repo.removeMatch(A + i + ".*");
}
break;
default:
throw new RuntimeException();
}
latch2.countDown();
}
}
@Test
public void testConcurrentModificationsClear() {
executor.execute(new Clearer(0));
repo.getMatch(A + (TOTAL - 10) + ".foobar");
Assert.assertEquals("Byteman rule failed?", 0, latch.getCount());
}
@Test
public void testConcurrentModificationsAdd() {
executor.execute(new Clearer(1));
repo.getMatch(A + (TOTAL - 10) + ".foobar");
Assert.assertEquals("Byteman rule failed?", 0, latch.getCount());
}
@Test
public void testConcurrentModificationsRemove() {
executor.execute(new Clearer(2));
repo.getMatch(A + (TOTAL - 10) + ".foobar");
Assert.assertEquals("Byteman rule failed?", 0, latch.getCount());
}
public static void bum() {
latch.countDown();
try {
latch2.await(3, TimeUnit.SECONDS);
} catch (InterruptedException e) {
// no op
}
}
}