Example usage for java.util.concurrent RejectedExecutionException RejectedExecutionException

Introduction

In this page you can find the example usage for java.util.concurrent RejectedExecutionException RejectedExecutionException.

Prototype

public RejectedExecutionException(String message, Throwable cause) 

Source Link

Document

Constructs a RejectedExecutionException with the specified detail message and cause.

Usage

From source file:org.opendaylight.controller.sal.binding.codegen.impl.SingletonHolder.java

/**
 * @deprecated This method is only used from configuration modules and thus callers of it
 *             should use service injection to make the executor configurable.
 *///  w w w  . j a  v a2s .  c om
@Deprecated
public static synchronized ListeningExecutorService getDefaultNotificationExecutor() {

    if (NOTIFICATION_EXECUTOR == null) {
        int queueSize = MAX_NOTIFICATION_QUEUE_SIZE;
        final String queueValue = System.getProperty(NOTIFICATION_QUEUE_SIZE_PROPERTY);
        if (StringUtils.isNotBlank(queueValue)) {
            try {
                queueSize = Integer.parseInt(queueValue);
                logger.trace("Queue size was set to {}", queueSize);
            } catch (final NumberFormatException e) {
                logger.warn("Cannot parse {} as set by {}, using default {}", queueValue,
                        NOTIFICATION_QUEUE_SIZE_PROPERTY, queueSize);
            }
        }

        // Overriding the queue:
        // ThreadPoolExecutor would not create new threads if the queue is not full, thus adding
        // occurs in RejectedExecutionHandler.
        // This impl saturates threadpool first, then queue. When both are full caller will get blocked.
        final BlockingQueue<Runnable> delegate = new LinkedBlockingQueue<>(queueSize);
        final BlockingQueue<Runnable> queue = new ForwardingBlockingQueue<Runnable>() {
            @Override
            protected BlockingQueue<Runnable> delegate() {
                return delegate;
            }

            @Override
            public boolean offer(final Runnable r) {
                // ThreadPoolExecutor will spawn a new thread after core size is reached only
                // if the queue.offer returns false.
                return false;
            }
        };

        final ThreadFactory factory = new ThreadFactoryBuilder().setDaemon(true)
                .setNameFormat("md-sal-binding-notification-%d").build();

        final ThreadPoolExecutor executor = new ThreadPoolExecutor(CORE_NOTIFICATION_THREADS,
                MAX_NOTIFICATION_THREADS, NOTIFICATION_THREAD_LIFE, TimeUnit.SECONDS, queue, factory,
                new RejectedExecutionHandler() {
                    // if the max threads are met, then it will raise a rejectedExecution. We then push to the queue.
                    @Override
                    public void rejectedExecution(final Runnable r, final ThreadPoolExecutor executor) {
                        try {
                            executor.getQueue().put(r);
                        } catch (final InterruptedException e) {
                            throw new RejectedExecutionException("Interrupted while waiting on the queue", e);
                        }
                    }
                });

        NOTIFICATION_EXECUTOR = MoreExecutors.listeningDecorator(executor);
    }

    return NOTIFICATION_EXECUTOR;
}

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From source file:org.openmrs.module.openconceptlab.updater.Updater.java

private ThreadPoolExecutor newRunner() {
    return new ThreadPoolExecutor(0, THREAD_POOL_SIZE, 60, TimeUnit.SECONDS,
            new ArrayBlockingQueue<Runnable>(THREAD_POOL_SIZE / 2), new RejectedExecutionHandler() {

                @Override/*from w  w  w .  j  a  v  a2  s.c  o m*/
                public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
                    try {
                        executor.getQueue().put(r);
                    } catch (InterruptedException e) {
                        throw new RejectedExecutionException("Work discarded", e);
                    }
                }
            });
}

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