Java 类org.apache.camel.util.concurrent.RejectableThreadPoolExecutor 实例源码

public ExecutorService newThreadPool(int corePoolSize, int maxPoolSize, long keepAliveTime, TimeUnit timeUnit, int maxQueueSize, boolean allowCoreThreadTimeOut,
                                     RejectedExecutionHandler rejectedExecutionHandler, ThreadFactory threadFactory) throws IllegalArgumentException {

    // the core pool size must be 0 or higher
    if (corePoolSize < 0) {
        throw new IllegalArgumentException("CorePoolSize must be >= 0, was " + corePoolSize);
    }

    // validate max >= core
    if (maxPoolSize < corePoolSize) {
        throw new IllegalArgumentException("MaxPoolSize must be >= corePoolSize, was " + maxPoolSize + " >= " + corePoolSize);
    }

    BlockingQueue<Runnable> workQueue;
    if (corePoolSize == 0 && maxQueueSize <= 0) {
        // use a synchronous queue for direct-handover (no tasks stored on the queue)
        workQueue = new SynchronousQueue<Runnable>();
        // and force 1 as pool size to be able to create the thread pool by the JDK
        corePoolSize = 1;
        maxPoolSize = 1;
    } else if (maxQueueSize <= 0) {
        // use a synchronous queue for direct-handover (no tasks stored on the queue)
        workQueue = new SynchronousQueue<Runnable>();
    } else {
        // bounded task queue to store tasks on the queue
        workQueue = new LinkedBlockingQueue<Runnable>(maxQueueSize);
    }

    ThreadPoolExecutor answer = new RejectableThreadPoolExecutor(corePoolSize, maxPoolSize, keepAliveTime, timeUnit, workQueue);
    answer.setThreadFactory(threadFactory);
    answer.allowCoreThreadTimeOut(allowCoreThreadTimeOut);
    if (rejectedExecutionHandler == null) {
        rejectedExecutionHandler = new ThreadPoolExecutor.CallerRunsPolicy();
    }
    answer.setRejectedExecutionHandler(rejectedExecutionHandler);
    return answer;
}

public ExecutorService newThreadPool(int corePoolSize, int maxPoolSize,
             long keepAliveTime, TimeUnit timeUnit, int maxQueueSize, boolean allowCoreThreadTimeOut, RejectedExecutionHandler
             rejectedExecutionHandler, ThreadFactory threadFactory) throws IllegalArgumentException {
    if(corePoolSize < 0) {
        throw new IllegalArgumentException("CorePoolSize must be >= 0, was " + corePoolSize);
    } else if(maxPoolSize < corePoolSize) {
        throw new IllegalArgumentException("MaxPoolSize must be >= corePoolSize, was " + maxPoolSize + " >= " + corePoolSize);
    } else {
        Object workQueue;
        if(corePoolSize == 0 && maxQueueSize <= 0) {
            workQueue = new SynchronousQueue();
            corePoolSize = 1;
            maxPoolSize = 1;
        } else if(maxQueueSize <= 0) {
            workQueue = new SynchronousQueue();
        } else {
            workQueue = new LinkedBlockingQueue(maxQueueSize);
        }

        RejectableThreadPoolExecutor answer = new RejectableThreadPoolExecutor(corePoolSize, maxPoolSize, keepAliveTime, timeUnit, (BlockingQueue)workQueue);
        answer.setThreadFactory(managedThreadFactory);
        answer.allowCoreThreadTimeOut(allowCoreThreadTimeOut);
        if(rejectedExecutionHandler == null) {
            rejectedExecutionHandler = new ThreadPoolExecutor.CallerRunsPolicy();
        }

        answer.setRejectedExecutionHandler(rejectedExecutionHandler);
        return answer;
    }
}

private ExecutorService createTestExecutorService(final RejectedExecutionHandler rejectedExecutionHandler) {
    return new RejectableThreadPoolExecutor(1, 1, 30, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(1), rejectedExecutionHandler);
}