/**
* 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.tez.common;
import static org.junit.Assert.assertEquals;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
public class TestEnvironmentUpdateUtils {
@Test(timeout = 5000)
public void testMultipleUpdateEnvironment() {
EnvironmentUpdateUtils.put("test.environment1", "test.value1");
EnvironmentUpdateUtils.put("test.environment2", "test.value2");
assertEquals("Environment was not set propertly", "test.value1", System.getenv("test.environment1"));
assertEquals("Environment was not set propertly", "test.value2", System.getenv("test.environment2"));
}
@Test(timeout = 5000)
public void testConcurrentRequests() throws InterruptedException {
int timeoutSecond = 5;
int concurThread = 10;
int exceptionCount = 0;
List<Callable<Object>> tasks = new ArrayList<Callable<Object>>();
List<ListenableFuture<Object>> pendingTasks = new ArrayList<ListenableFuture<Object>>();
final ExecutorService callbackExecutor = Executors.newFixedThreadPool(concurThread,
new ThreadFactoryBuilder().setDaemon(false).setNameFormat("CallbackExecutor").build());
ListeningExecutorService taskExecutorService =
MoreExecutors.listeningDecorator(callbackExecutor);
while(concurThread > 0){
ListenableFuture<Object> runningTaskFuture =
taskExecutorService.submit(new EnvironmentRequest());
pendingTasks.add(runningTaskFuture);
concurThread--;
}
//waiting for all threads submitted to thread pool
for (ListenableFuture<Object> future : pendingTasks) {
try {
future.get();
} catch (ExecutionException e) {
exceptionCount++;
}
}
//stop accepting new threads and shutdown threadpool
taskExecutorService.shutdown();
try {
if(!taskExecutorService.awaitTermination(timeoutSecond, TimeUnit.SECONDS)) {
taskExecutorService.shutdownNow();
}
} catch (InterruptedException ie) {
taskExecutorService.shutdownNow();
}
assertEquals(0, exceptionCount);
}
private class EnvironmentRequest implements Callable<Object> {
@Override
public Object call() throws Exception {
EnvironmentUpdateUtils.put("test.environment.concurrent"
+Thread.currentThread().getId(), "test.evironment.concurrent");
return null;
}
}
}