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// Portions Copyright [2016] [Payara Foundation]

package com.sun.enterprise.v3.server;

import org.glassfish.hk2.api.Factory;
import org.jvnet.hk2.annotations.Service;
import java.util.concurrent.ThreadFactory;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Singleton executor service factory.
 *
 * @author Jerome Dochez
 */
@Service
public class ExecutorServiceFactory implements Factory {
    
    private ExecutorService service;
    private AtomicInteger count = new AtomicInteger(1);

    /* (non-Javadoc)
     * @see org.glassfish.hk2.api.Factory#provide()
     */
    @Override
    public ExecutorService provide() {
       
        if (service == null) {
            service = Executors.newCachedThreadPool(new ThreadFactory() {
            public Thread newThread(Runnable r) {
                Thread t = Executors.defaultThreadFactory().newThread(r);
                t.setDaemon(true);
                t.setName("Executor-Service-" + count.getAndIncrement());
                // ensure we don't inherit any context classloader
                t.setContextClassLoader(null);
                return t;
            }
        }
        );
        }
        return service;
    }

    /* (non-Javadoc)
     * @see org.glassfish.hk2.api.Factory#dispose(java.lang.Object)
     */
    @Override
    public void dispose(ExecutorService instance) {
        // TODO Auto-generated method stub
        
    }
}