java LimitedThreadPool详解编程语言

    /** 
     * 此线程池一直增长，直到上限，增长后不收缩。 
     * */ 
    public class LimitedThreadPool implements ThreadPool { 
        public static final int DEFAULT_CORE_THREADS = 0; 
        public static final int DEFAULT_THREADS = 200; 
        public static final int DEFAULT_QUEUES = 0; 
 
        public Executor getExecutor(URL url) { 
            String name = url.getParameter(Constants.THREAD_NAME_KEY, Constants.DEFAULT_THREAD_NAME); 
            int cores = url.getParameter(Constants.CORE_THREADS_KEY, Constants.DEFAULT_CORE_THREADS); 
            int threads = url.getParameter(Constants.THREADS_KEY, Constants.DEFAULT_THREADS); 
            int queues = url.getParameter(Constants.QUEUES_KEY, Constants.DEFAULT_QUEUES); 
            return new ThreadPoolExecutor(cores, threads, Long.MAX_VALUE, TimeUnit.MILLISECONDS, 
                    queues == 0 ? new SynchronousQueue<Runnable>() 
                            : (queues < 0 ? new LinkedBlockingQueue<Runnable>() 
                                    : new LinkedBlockingQueue<Runnable>(queues)), 
                    new NamedThreadFactory(name, true), new AbortPolicyWithReport(name, url)); 
        } 
 
    }

public interface ThreadPool { 
     
    /** 
     * 线程池 
     *  
     * @param url 线程参数 
     * @return 线程池 
     */ 
    @Adaptive({Constants.THREADPOOL_KEY}) 
    Executor getExecutor(URL url); 
 
}