org.sweble.wikitext.articlecruncher.utils.DaemonThreadFactory Maven / Gradle / Ivy

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A framework for multi-threaded processing of lots of articles.

There is a newer version: 3.1.9

/**
 * Copyright 2011 The Open Source Research Group,
 *                University of Erlangen-Nürnberg
 *
 * 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.sweble.wikitext.articlecruncher.utils;

import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

public class DaemonThreadFactory
		implements
			ThreadFactory
{
	private final AtomicInteger threadNumber = new AtomicInteger(1);
	
	private final ThreadGroup group;
	
	private final String namePrefix;
	
	// =========================================================================
	
	public DaemonThreadFactory(String poolName)
	{
		this(poolName, Thread.currentThread().getThreadGroup());
	}
	
	public DaemonThreadFactory(String poolName, ThreadGroup group)
	{
		if (group == null)
			group = new ThreadGroup(poolName);
		
		this.group = group;
		
		this.namePrefix = String.format("%s-thread-%%02d", poolName);
	}
	
	// =========================================================================
	
	@Override
	public Thread newThread(Runnable runnable)
	{
		String name = String.format(namePrefix, threadNumber.getAndIncrement());
		
		Thread thread = new Thread(group, runnable, name);
		
		if (!thread.isDaemon())
			thread.setDaemon(true);
		
		if (thread.getPriority() != Thread.NORM_PRIORITY)
			thread.setPriority(Thread.NORM_PRIORITY);
		
		return thread;
	}
	
	public ThreadGroup getThreadGroup()
	{
		return group;
	}
}