Murat Parlakisik
Committed by Gerrit Code Review

Shared Executors implementation , (ONOS-1302)

Change-Id: I7fe5e415bf605c198d3bb42328477aef396c5c89
/*
* Copyright 2015 Open Networking Laboratory
*
* 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 org.onlab.util;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import static org.onlab.util.Tools.groupedThreads;
/**
* SharedExecutors is designed to use thread pool for applications.
* SharedExecutors is recommended for applications instead of creating new thread groups.
*/
public final class SharedExecutors {
private static int numberOfThreads = 30;
private static ExecutorService singleThreadExecutor =
Executors.newSingleThreadExecutor(groupedThreads("onos/shared", "onos-single-executor"));
private static ExecutorService poolThreadExecutor =
Executors.newFixedThreadPool(numberOfThreads, groupedThreads("onos/shared", "onos-pool-executor-%d"));
private static java.util.Timer sharedTimer =
new java.util.Timer("onos-shared-timer");
private SharedExecutors() {
}
/**
* Returns the single thread executor.
*
* @return shared single thread executor
*/
public static ExecutorService getSingleThreadExecutor() {
return singleThreadExecutor;
}
/**
* Returns the pool thread executor.
*
* @return shared executor pool
*/
public static ExecutorService getPoolThreadExecutor() {
return poolThreadExecutor;
}
/**
* Returns the pool timer.
*
* @return shared timer
*/
public static java.util.Timer getTimer() {
return sharedTimer;
}
}
/*
* Copyright 2015 Open Networking Laboratory
*
* 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 org.onlab.util;
import org.junit.Test;
import java.util.concurrent.ExecutorService;
import static org.junit.Assert.*;
/**
* Tests of the SharedExecutors Test.
*/
public class SharedExecutorsTest {
@Test
public void singleThread() {
ExecutorService a = SharedExecutors.getSingleThreadExecutor();
assertNotNull("ExecutorService must not be null", a);
ExecutorService b = SharedExecutors.getSingleThreadExecutor();
assertSame("factories should be same", a, b);
}
@Test
public void poolThread() {
ExecutorService a = SharedExecutors.getPoolThreadExecutor();
assertNotNull("ExecutorService must not be null", a);
ExecutorService b = SharedExecutors.getPoolThreadExecutor();
assertSame("factories should be same", a, b);
}
@Test
public void timer() {
java.util.Timer a = SharedExecutors.getTimer();
assertNotNull("Timer must not be null", a);
java.util.Timer b = SharedExecutors.getTimer();
assertSame("factories should be same", a, b);
}
}