Java Code Examples for java.util.concurrent.ScheduledThreadPoolExecutor#allowCoreThreadTimeOut()

private static void test(boolean allowTimeout) throws Exception {
    CountingThreadFactory ctf = new CountingThreadFactory();
    ScheduledThreadPoolExecutor stpe
        = new ScheduledThreadPoolExecutor(10, ctf);
    try {
        // schedule a dummy task in the "far future"
        Runnable nop = new Runnable() { public void run() {}};
        stpe.schedule(nop, FAR_FUTURE_MS, MILLISECONDS);
        stpe.setKeepAliveTime(1L, MILLISECONDS);
        stpe.allowCoreThreadTimeOut(allowTimeout);
        MILLISECONDS.sleep(12L);
    } finally {
        stpe.shutdownNow();
        if (!stpe.awaitTermination(LONG_DELAY_MS, MILLISECONDS))
            throw new AssertionError("timed out");
    }
    if (ctf.count.get() > 1)
        throw new AssertionError(
            String.format("%d threads created, 1 expected",
                          ctf.count.get()));
}
 

/**
 * Builds a new TraceGrpcApiService.
 */
public TraceGrpcApiService build() throws IOException {
  if (credentials == null) {
    credentials = GoogleCredentials.getApplicationDefault();
  }

  if(executorService == null) {
    ScheduledThreadPoolExecutor scheduledThreadPoolExecutor = new ScheduledThreadPoolExecutor(1);
    // Have the flushing threads shutdown if idle for the scheduled delay.
    scheduledThreadPoolExecutor.setKeepAliveTime(scheduledDelay, TimeUnit.SECONDS);
    scheduledThreadPoolExecutor.allowCoreThreadTimeOut(true);
    executorService = scheduledThreadPoolExecutor;
  }

  return new TraceGrpcApiService(projectId, optionsFactory, bufferSize,
      scheduledDelay, credentials, executorService);
}
 

@SuppressWarnings("SameParameterValue")
public static ScheduledThreadPoolExecutor getScheduledThreadPoolExecutor(String name,
                                                                         int corePoolSize,
                                                                         int maximumPoolSize,
                                                                         long keepAliveTimeInSec) {
    final ThreadFactory threadFactory = new ThreadFactoryBuilder()
            .setNameFormat(name)
            .setDaemon(true)
            .setPriority(Thread.MIN_PRIORITY)
            .build();
    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(corePoolSize, threadFactory);
    executor.setKeepAliveTime(keepAliveTimeInSec, TimeUnit.SECONDS);
    executor.allowCoreThreadTimeOut(true);
    executor.setMaximumPoolSize(maximumPoolSize);
    executor.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
    executor.setRejectedExecutionHandler((r, e) -> log.debug("RejectedExecutionHandler called"));
    return executor;
}
 

/**
 * Creates a {@link ScheduledThreadPoolExecutor} with custom name for the threads.
 *
 * @param name the prefix to add to the thread name in ThreadFactory.
 * @return The default thread pool for request timeout and client execution timeout features.
 */
public static ScheduledThreadPoolExecutor buildDefaultTimeoutThreadPool(final String name) {
    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(5, getThreadFactory(name));
    safeSetRemoveOnCancel(executor);
    executor.setKeepAliveTime(5, TimeUnit.SECONDS);
    executor.allowCoreThreadTimeOut(true);

    return executor;
}
 

public static ScheduledExecutorService getScheduledExecutor(ThreadGroup group, String namePrefix, int threadCount, long keepAliveSeconds, boolean preStart) {
    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(threadCount, new ExecutionPoolThreadFactory(group, namePrefix));
    if (keepAliveSeconds > 0) {
        executor.setKeepAliveTime(keepAliveSeconds, TimeUnit.SECONDS);
        executor.allowCoreThreadTimeOut(true);
    }
    if (preStart) {
        executor.prestartAllCoreThreads();
    }
    return executor;
}
 

private ScheduledThreadPoolExecutor newBlockingTaskExecutor() {
    final ScheduledThreadPoolExecutor blockingTaskExecutor = new ScheduledThreadPoolExecutor(
            getMaxThreads(),
            ThreadFactories.newThreadFactory("armeria-dropwizard-blocking-tasks", true));
    blockingTaskExecutor.setKeepAliveTime(60, TimeUnit.SECONDS);
    blockingTaskExecutor.allowCoreThreadTimeOut(true);
    return blockingTaskExecutor;
}
 

public TaskMonitor(final JobId jobId, final FlapController flapController,
                   final StatusUpdater statusUpdater) {
  this.jobId = jobId;
  this.flapController = flapController;
  this.statusUpdater = statusUpdater;

  final ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1);
  // Let core threads time out to avoid unnecessarily keeping a flapping state check thread alive
  // for the majority of tasks that do not flap.
  executor.setKeepAliveTime(5, SECONDS);
  executor.allowCoreThreadTimeOut(true);
  this.scheduler = MoreExecutors.getExitingScheduledExecutorService(executor, 0, SECONDS);
}
 

/**
 * Creates and configures a new {@link ScheduledExecutorService} with a
 * timeout value of {@code seconds}. If the timeout value is below or equal
 * to zero then the returned executor will never timeout.
 *
 * @return the newly created and configured executor service.
 */
private static ScheduledExecutorService createServiceExecutor(long seconds) {
    Preconditions.checkArgument(seconds >= 0, "The timeout value must be equal to or greater than 0!");
    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1);
    executor.setRejectedExecutionHandler(new CallerRunsPolicy());
    executor.setThreadFactory(new ThreadFactoryBuilder().setNameFormat("ServiceQueueThread").build());
    if (seconds > 0) {
        executor.setKeepAliveTime(seconds, TimeUnit.SECONDS);
        executor.allowCoreThreadTimeOut(true);
    }
    return executor;
}
 

@Inject
public DefaultScheduledExecutorServiceProvider(@Named(ConfigurableMessagingSettings.PROPERTY_MESSAGING_MAXIMUM_PARALLEL_SENDS) int maximumParallelSends,
                                               ShutdownNotifier shutdownNotifier) {
    ThreadFactory schedulerNamedThreadFactory = new JoynrThreadFactory("ScheduledExecutorService", true);

    /*
     * Number of required threads (numbers in parentheses mean: no dedicated thread is required here):
     *
     * MessageRouter: #maximumParallelSends (default: 20) messageWorkers
     *                (1) routingTableCleanup
     * ArbitratorFactory: 1 arbitratorRunnable
     * MessagingSkeletonFactory: 1 per skeleton (transport), only required during startup, can be executed one after the other
     * HttpBridgeEndpointRegistryClient: N/A (JEE only): uses scheduledExecutorServcie of the application server
     * MqttPahoClientFactory: 4 per Mqtt connection?
     * ExpiredDiscoveryEntryCacheCleaner: (1) cleanupAction
     * RequestReplyManagerImpl: (1) cleanupScheduler for queued requests
     * PublicationManagerImpl: (1) cleanupScheduler for subscriptions
     * SubscriptionManagerImpl: (1) cleanupScheduler for subscriptions
     * ReplyCallerDirectory: (1) cleanupScheduler for ReplyCallers
    */
    scheduler = new ScheduledThreadPoolExecutor(maximumParallelSends + MAX_SKELETON_THREADS + MQTT_THREADS,
                                                schedulerNamedThreadFactory);
    scheduler.setKeepAliveTime(100, TimeUnit.SECONDS);
    scheduler.allowCoreThreadTimeOut(true);

    shutdownNotifier.registerToBeShutdownAsLast(this);
}
 

ScheduledExecutorService provideMessageSchedulerThreadPoolExecutor() {
    ThreadFactory schedulerNamedThreadFactory = new JoynrThreadFactory("joynr.MessageScheduler-scheduler");
    ScheduledThreadPoolExecutor scheduler = new ScheduledThreadPoolExecutor(2, schedulerNamedThreadFactory);
    scheduler.setKeepAliveTime(100, TimeUnit.SECONDS);
    scheduler.allowCoreThreadTimeOut(true);
    return scheduler;
}
 

/**
 * Create a StatusResponseManager with default parameters.
 */
StatusResponseManager() {
    int cap = AccessController.doPrivileged(
            new GetIntegerAction("jdk.tls.stapling.cacheSize",
                DEFAULT_CACHE_SIZE));
    cacheCapacity = cap > 0 ? cap : 0;

    int life = AccessController.doPrivileged(
            new GetIntegerAction("jdk.tls.stapling.cacheLifetime",
                DEFAULT_CACHE_LIFETIME));
    cacheLifetime = life > 0 ? life : 0;

    String uriStr = GetPropertyAction
            .privilegedGetProperty("jdk.tls.stapling.responderURI");
    URI tmpURI;
    try {
        tmpURI = ((uriStr != null && !uriStr.isEmpty()) ?
                new URI(uriStr) : null);
    } catch (URISyntaxException urise) {
        tmpURI = null;
    }
    defaultResponder = tmpURI;

    respOverride = AccessController.doPrivileged(
            new GetBooleanAction("jdk.tls.stapling.responderOverride"));
    ignoreExtensions = AccessController.doPrivileged(
            new GetBooleanAction("jdk.tls.stapling.ignoreExtensions"));

    threadMgr = new ScheduledThreadPoolExecutor(DEFAULT_CORE_THREADS,
            new ThreadFactory() {
        @Override
        public Thread newThread(Runnable r) {
            Thread t = Executors.defaultThreadFactory().newThread(r);
            t.setDaemon(true);
            return t;
        }
    }, new ThreadPoolExecutor.DiscardPolicy());
    threadMgr.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
    threadMgr.setContinueExistingPeriodicTasksAfterShutdownPolicy(
            false);
    threadMgr.setKeepAliveTime(5000, TimeUnit.MILLISECONDS);
    threadMgr.allowCoreThreadTimeOut(true);
    responseCache = Cache.newSoftMemoryCache(
            cacheCapacity, cacheLifetime);
}
 

/**
 * Create a StatusResponseManager with default parameters.
 */
StatusResponseManager() {
    int cap = AccessController.doPrivileged(
            new GetIntegerAction("jdk.tls.stapling.cacheSize",
                DEFAULT_CACHE_SIZE));
    cacheCapacity = cap > 0 ? cap : 0;

    int life = AccessController.doPrivileged(
            new GetIntegerAction("jdk.tls.stapling.cacheLifetime",
                DEFAULT_CACHE_LIFETIME));
    cacheLifetime = life > 0 ? life : 0;

    String uriStr = GetPropertyAction
            .privilegedGetProperty("jdk.tls.stapling.responderURI");
    URI tmpURI;
    try {
        tmpURI = ((uriStr != null && !uriStr.isEmpty()) ?
                new URI(uriStr) : null);
    } catch (URISyntaxException urise) {
        tmpURI = null;
    }
    defaultResponder = tmpURI;

    respOverride = GetBooleanAction
            .privilegedGetProperty("jdk.tls.stapling.responderOverride");
    ignoreExtensions = GetBooleanAction
            .privilegedGetProperty("jdk.tls.stapling.ignoreExtensions");

    threadMgr = new ScheduledThreadPoolExecutor(DEFAULT_CORE_THREADS,
            new ThreadFactory() {
        @Override
        public Thread newThread(Runnable r) {
            Thread t = Executors.defaultThreadFactory().newThread(r);
            t.setDaemon(true);
            return t;
        }
    }, new ThreadPoolExecutor.DiscardPolicy());
    threadMgr.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
    threadMgr.setContinueExistingPeriodicTasksAfterShutdownPolicy(
            false);
    threadMgr.setKeepAliveTime(5000, TimeUnit.MILLISECONDS);
    threadMgr.allowCoreThreadTimeOut(true);
    responseCache = Cache.newSoftMemoryCache(
            cacheCapacity, cacheLifetime);
}