Java 如果ThreadPoolExecutor的submit（）方法已饱和，如何使之阻塞？

我刚刚发现的可能解决方案之一：

public class BoundedExecutor {    private final Executor exec;    private final Semaphore semaphore;    public BoundedExecutor(Executor exec, int bound) {        this.exec = exec;        this.semaphore = new Semaphore(bound);    }    public void submitTask(final Runnable command) throws InterruptedException, RejectedExecutionException {        semaphore.acquire();        try { exec.execute(new Runnable() {     public void run() {         try {  command.run();         } finally {  semaphore.release();         }     } });        } catch (RejectedExecutionException e) { semaphore.release(); throw e;        }    }}

还有其他解决方案吗？我更喜欢基于此的东西，

RejectedExecutionHandler