com.varra.util.SafeThreadFactory Maven / Gradle / Ivy
/*
* utils4j - SafeThreadFactory.java, Apr 1, 2013 1:22:43 PM
*
* 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 com.varra.util;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
import com.varra.log.Logger;
/**
*
* The Safe thread factory which sets/resets the task's running status flag to
* avoid the duplicate execution of same kind.
*
* @author Rajakrishna V.
* Reddy
* @version 1.0
*
*/
public class SafeThreadFactory implements ThreadFactory
{
/** The logger to log the debugging messages as application runs. */
private static final Logger logger = Logger.getLogger(SafeThreadFactory.class);
/** The Constant poolNumber. */
private static final AtomicInteger poolNumber = new AtomicInteger(1);
/** The group. */
private final ThreadGroup group;
/** The thread number. */
private final AtomicInteger threadNumber = new AtomicInteger(1);
/** The name prefix. */
private final String namePrefix;
/**
* Instantiates a new default thread factory.
*/
public SafeThreadFactory()
{
final SecurityManager s = System.getSecurityManager();
group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
namePrefix = "pool-" + poolNumber.getAndIncrement() + "-thread-";
logger.info("Initialized successfully with group: " + group + ", namePrefix: " + namePrefix);
}
/*
* (non-Javadoc)
*
* @see java.util.concurrent.ThreadFactory#newThread(java.lang.Runnable)
*/
public Thread newThread(final Runnable task)
{
final Thread newThread = new Thread(group, task, namePrefix + threadNumber.getAndIncrement(), 0)
{
/*
* (non-Javadoc)
*
* @see java.lang.Thread#run()
*/
@Override
public void run()
{
logger.info("Set the running state to true.");
try
{
if (ObjectUtils.isNotNull(task))
{
task.run();
}
}
catch (Exception ex)
{
logger.error("Got an unExpected Error while processing event.", ex);
}
try
{
if (task instanceof EnhancedTimerTask)
{
((EnhancedTimerTask) task).setRunning(false);
logger.info("Set the running state to false.");
}
}
catch (Exception e)
{
// What can I do here, in fact not required.!!
}
}
};
if (newThread.isDaemon())
newThread.setDaemon(false);
if (newThread.getPriority() != Thread.NORM_PRIORITY)
newThread.setPriority(Thread.NORM_PRIORITY);
logger.info("Created a new thread successfully: " + newThread);
return newThread;
}
}