/*
* Copyright 2014 NAVER Corp.
*
* Licensed 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.navercorp.pinpoint.profiler.context;
import static org.junit.Assert.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Queue;
import java.util.Vector;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import com.navercorp.pinpoint.bootstrap.context.ServerMetaData;
import com.navercorp.pinpoint.bootstrap.context.ServerMetaDataHolder;
/**
* @author hyungil.jeong
*/
public class DefaultServerMetaDataHolderTest {
private static final int THREAD_COUNT = 500;
private static final String SERVER_INFO = "testContainerInfo";
private static final List<String> VM_ARGS = Arrays.asList("testVmArgs");
private ExecutorService executorService;
@Before
public void setUp() {
this.executorService = Executors.newFixedThreadPool(THREAD_COUNT);
}
@After
public void cleanUp() {
this.executorService.shutdown();
}
@Test
public void testRaceConditionWhenAddingServiceInfo() throws InterruptedException {
// Given
final CountDownLatch initLatch = new CountDownLatch(THREAD_COUNT);
final CountDownLatch startLatch = new CountDownLatch(1);
final CountDownLatch endLatch = new CountDownLatch(THREAD_COUNT);
final Queue<Throwable> exceptions = new ConcurrentLinkedQueue<Throwable>();
final String serviceName = "/test";
final TestableServerMetaDataListener listener = new TestableServerMetaDataListener();
final ServerMetaDataHolder metaDataContext = new DefaultServerMetaDataHolder(VM_ARGS);
metaDataContext.addListener(listener);
metaDataContext.setServerName(SERVER_INFO);
// When
for (int i = 0; i < THREAD_COUNT; ++i) {
final List<String> serviceLibs = new ArrayList<String>();
executorService.submit(new Callable<Void>() {
@Override
public Void call() throws Exception {
initLatch.countDown();
try {
startLatch.await();
metaDataContext.addServiceInfo(serviceName, serviceLibs);
metaDataContext.notifyListeners();
} catch (final Throwable t) {
exceptions.add(t);
} finally {
endLatch.countDown();
}
return null;
}
});
}
initLatch.await();
startLatch.countDown();
endLatch.await();
// Then
assertTrue("Failed with exceptions : " + exceptions, exceptions.isEmpty());
ServerMetaData metaData = listener.getServerMetaData();
assertEquals(metaData.getServerInfo(), SERVER_INFO);
assertEquals(metaData.getVmArgs(), VM_ARGS);
assertEquals(metaData.getServiceInfos().size(), THREAD_COUNT);
}
@Test
public void testRaceConditionWhenAddingAndInteratingServiceInfo() throws InterruptedException {
// Given
final CountDownLatch initLatch = new CountDownLatch(THREAD_COUNT);
final CountDownLatch startLatch = new CountDownLatch(1);
final CountDownLatch endLatch = new CountDownLatch(THREAD_COUNT);
final Queue<Throwable> exceptions = new ConcurrentLinkedQueue<Throwable>();
final TestableServerMetaDataListener listener = new TestableServerMetaDataListener();
final ServerMetaDataHolder metaDataContext = new DefaultServerMetaDataHolder(VM_ARGS);
metaDataContext.addListener(listener);
metaDataContext.setServerName(SERVER_INFO);
// When
final List<ServerMetaData> serverMetaDatas = new Vector<ServerMetaData>(THREAD_COUNT/2);
for (int i = 0; i < THREAD_COUNT; ++i) {
if (i % 2 == 0) {
final String serviceName = "/name" + i;
final List<String> serviceLibs = new ArrayList<String>();
executorService.submit(new Callable<Void>() {
@Override
public Void call() throws Exception {
initLatch.countDown();
try {
startLatch.await();
metaDataContext.addServiceInfo(serviceName, serviceLibs);
metaDataContext.notifyListeners();
} catch (Throwable t) {
exceptions.add(t);
} finally {
endLatch.countDown();
}
return null;
}
});
} else {
executorService.submit(new Callable<Void>() {
@Override
public Void call() throws Exception {
initLatch.countDown();
try {
startLatch.await();
ServerMetaData serverMetaData = listener.getServerMetaData();
serverMetaDatas.add(serverMetaData);
} catch (Throwable t) {
exceptions.add(t);
} finally {
endLatch.countDown();
}
return null;
}
});
}
}
initLatch.await();
startLatch.countDown();
endLatch.await();
// Then
assertTrue("Failed with exceptions : " + exceptions, exceptions.isEmpty());
ServerMetaData metaData = listener.getServerMetaData();
assertEquals(metaData.getServerInfo(), SERVER_INFO);
assertEquals(metaData.getVmArgs(), VM_ARGS);
assertEquals(metaData.getServiceInfos().size(), THREAD_COUNT/2);
assertEquals(serverMetaDatas.size(), THREAD_COUNT/2);
}
}