net.sf.ehcache.constructs.nonstop.CacheManagerExecutorServiceFactory Maven / Gradle / Ivy
/**
* Copyright Terracotta, Inc.
*
* 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 net.sf.ehcache.constructs.nonstop;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
import net.sf.ehcache.CacheManager;
/**
* {@link NonstopExecutorServiceFactory} that creates and maintains one per CacheManager
*
* @author Abhishek Sanoujam
*
*/
public final class CacheManagerExecutorServiceFactory implements NonstopExecutorServiceFactory {
/**
* A string that is a part of the thread name created by the default thread factory.
*/
private static final String EXECUTOR_THREAD_NAME_PREFIX = "Executor Thread";
private static final CacheManagerExecutorServiceFactory SINGLETON = new CacheManagerExecutorServiceFactory();
private final Map executorServiceMap = new HashMap();
/**
* private constructor
*/
private CacheManagerExecutorServiceFactory() {
//
}
/**
* Returns the singleton instance
*
* @return the singleton instance
*/
public static CacheManagerExecutorServiceFactory getInstance() {
return SINGLETON;
}
/**
* {@inheritDoc}
*/
public NonstopExecutorService getOrCreateNonstopExecutorService(final CacheManager cacheManager) {
final String cacheManagerName = cacheManager.getName();
synchronized (executorServiceMap) {
NonstopExecutorService rv = executorServiceMap.get(cacheManagerName);
if (rv == null) {
rv = new NonstopExecutorServiceImpl(new ThreadFactory() {
private final AtomicInteger count = new AtomicInteger();
public Thread newThread(Runnable runnable) {
Thread thread = new NonstopThread(runnable, "NonStopCache [" + cacheManagerName + "] "
+ EXECUTOR_THREAD_NAME_PREFIX + "-" + count.incrementAndGet() + " for '" + Thread.currentThread().getName()
+ "'");
thread.setDaemon(true);
return thread;
}
});
executorServiceMap.put(cacheManagerName, rv);
}
return rv;
}
}
/**
* {@inheritDoc}
*/
public void shutdown(final CacheManager cacheManager) {
synchronized (executorServiceMap) {
NonstopExecutorService executorService = executorServiceMap.remove(cacheManager.getName());
if (executorService != null) {
executorService.shutdown();
}
}
}
}