Java线程池工具类

直接贴代码:

import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AsyncTaskExecutorUtil {
    private static final Logger logger = LoggerFactory.getLogger(AsyncTaskExecutorUtil.class);
    private static final AsyncTaskExecutorUtil instance = new AsyncTaskExecutorUtil();
    private ThreadPoolExecutor executor;
    
    private static final int capacity = 100000;
    
    private AsyncTaskExecutorUtil(){
    }
    
    public static void execute(Runnable task){
        if(instance.executor==null){
            synchronized(instance){
                if(instance.executor==null){
                    try{
                        instance.executor = new ThreadPoolExecutor(  
                                10, 10, 30, TimeUnit.SECONDS,   
                                new LinkedBlockingQueue(capacity),   
                                new ThreadPoolExecutor.CallerRunsPolicy());
                    }catch(Throwable ex){
                            logger.error("Intial AsyncTaskExecutorUtil failed!", ex);
                    }
                }
            }
        }
        try{
            instance.executor.execute(task);
        }catch(Throwable ex){
            logger.error("Execute AsyncTaskExecutorUtil failed!", ex);
        }
    }

}