CollectionsThreadFactory.java

/*
 * Copyright 2011 Goldman Sachs.
 *
 * 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 com.gs.collections.impl.parallel;

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

public final class CollectionsThreadFactory
        implements ThreadFactory
{
    private final ThreadGroup group;
    private final AtomicInteger threadNumber = new AtomicInteger(1);
    private final String namePrefix;
    private boolean isDaemon = true;

    CollectionsThreadFactory(String poolPrefix, boolean useDaemonThreads)
    {
        this.isDaemon = useDaemonThreads;
        SecurityManager securityManager = System.getSecurityManager();
        this.group = securityManager == null ? Thread.currentThread().getThreadGroup() : securityManager.getThreadGroup();
        this.namePrefix = poolPrefix + " pool- thread-";
    }

    public Thread newThread(Runnable r)
    {
        Thread t = new Thread(this.group, r, this.namePrefix + this.threadNumber.getAndIncrement(), 0);
        t.setDaemon(this.isDaemon);
        if (t.getPriority() != Thread.NORM_PRIORITY)
        {
            t.setPriority(Thread.NORM_PRIORITY);
        }
        return t;
    }
}