Example usage for java.util.concurrent ScheduledThreadPoolExecutor ScheduledThreadPoolExecutor

Introduction

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

Prototype

public ScheduledThreadPoolExecutor(int corePoolSize) 

Source Link

Document

Creates a new ScheduledThreadPoolExecutor with the given core pool size.

Usage

From source file:Main.java

public static void main(String args[]) {
    ScheduledThreadPoolExecutor stpe = new ScheduledThreadPoolExecutor(5);

    stpe.scheduleAtFixedRate(new Job1(), 0, 5, TimeUnit.SECONDS);
    stpe.scheduleAtFixedRate(new Job2(), 1, 2, TimeUnit.SECONDS);
}

---

From source file:Main.java

public static void main(String[] args) {
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    ScheduledThreadPoolExecutor scheduledThreadPoolExecutor = new ScheduledThreadPoolExecutor(2);
    scheduledThreadPoolExecutor.scheduleAtFixedRate(() -> {

        throw new RuntimeException(" scheduleAtFixedRate test ScheduledThreadPoolExecutor");
    }, 0, 3000, TimeUnit.MILLISECONDS);

    scheduledThreadPoolExecutor.scheduleAtFixedRate(() -> {

        System.out.println("scheduleAtFixedRate: " + LocalDateTime.now().format(formatter));
    }, 0, 2000, TimeUnit.MILLISECONDS);

    scheduledThreadPoolExecutor.schedule(() -> {

        System.out.println("schedule");
    }, 1, TimeUnit.SECONDS);//  www .  j a v  a  2s  . co m
}

---

From source file:Test.java

public static void main(String args[]) throws Exception {
    ExecutorService pool = new ScheduledThreadPoolExecutor(3);
    AsynchronousFileChannel fileChannel = AsynchronousFileChannel.open(Paths.get("data.txt"),
            EnumSet.of(StandardOpenOption.READ), pool);
    CompletionHandler<Integer, ByteBuffer> handler = new CompletionHandler<Integer, ByteBuffer>() {
        public synchronized void completed(Integer result, ByteBuffer attachment) {
            for (int i = 0; i < attachment.limit(); i++) {
                System.out.print((char) attachment.get(i));
            }//ww  w. j  av a  2 s . c  om
        }

        public void failed(Throwable e, ByteBuffer attachment) {
        }
    };
    final int bufferCount = 5;
    ByteBuffer buffers[] = new ByteBuffer[bufferCount];
    for (int i = 0; i < bufferCount; i++) {
        buffers[i] = ByteBuffer.allocate(10);
        fileChannel.read(buffers[i], i * 10, buffers[i], handler);
    }
    pool.awaitTermination(1, TimeUnit.SECONDS);
    for (ByteBuffer byteBuffer : buffers) {
        for (int i = 0; i < byteBuffer.limit(); i++) {
            System.out.println((char) byteBuffer.get(i));
        }
    }
}

---

From source file:Test.java

public static void main(String args[]) throws Exception {
    ExecutorService pool = new ScheduledThreadPoolExecutor(3);
    AsynchronousFileChannel fileChannel = AsynchronousFileChannel.open(Paths.get("data.txt"),
            EnumSet.of(StandardOpenOption.READ), pool);
    CompletionHandler<Integer, ByteBuffer> handler = new CompletionHandler<Integer, ByteBuffer>() {
        @Override/*from   w w w  .j ava 2s  .co m*/
        public synchronized void completed(Integer result, ByteBuffer attachment) {
            for (int i = 0; i < attachment.limit(); i++) {
                System.out.println((char) attachment.get(i));
            }
        }

        @Override
        public void failed(Throwable e, ByteBuffer attachment) {
        }
    };
    final int bufferCount = 5;
    ByteBuffer buffers[] = new ByteBuffer[bufferCount];
    for (int i = 0; i < bufferCount; i++) {
        buffers[i] = ByteBuffer.allocate(10);
        fileChannel.read(buffers[i], i * 10, buffers[i], handler);
    }
    pool.awaitTermination(1, TimeUnit.SECONDS);
    for (ByteBuffer byteBuffer : buffers) {
        for (int i = 0; i < byteBuffer.limit(); i++) {
            System.out.print((char) byteBuffer.get(i));
        }
    }
}

---

From source file:Main.java

public static void main(String[] a) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(200, 300);//from w ww  .  j  a  v a  2s.c  o  m
    PaintSurface canvas = new PaintSurface();

    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(3);
    executor.scheduleAtFixedRate(canvas, 0L, 100L, TimeUnit.MILLISECONDS);

    f.add(canvas);
    f.setVisible(true);
}

---

From source file:BallRoom.java

public static void main(String[] a) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(200, 300);// w w  w.ja v  a2  s  .  c o  m
    PaintSurface canvas = new PaintSurface();

    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(3);
    executor.scheduleAtFixedRate(canvas, 0L, 100L, TimeUnit.MILLISECONDS);

    f.getContentPane().add(canvas);
    f.setVisible(true);

}

---

From source file:com.amazonaws.http.HttpRequestTimer.java

private static ScheduledThreadPoolExecutor createExecutor() {
    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(5);
    safeSetRemoveOnCancel(executor);//from ww w.ja  va  2 s  .  c  o m
    executor.setKeepAliveTime(5, TimeUnit.SECONDS);
    executor.allowCoreThreadTimeOut(true);
    return executor;
}

---

From source file:amqp.spring.camel.component.ContrivedLoadTest.java

@Test
public void testSynchronous() throws Exception {
    final int messageCount = 1000;
    int received = 0;
    ScheduledExecutorService executorService = new ScheduledThreadPoolExecutor(messageCount);
    List<Future<String>> futures = new ArrayList<Future<String>>();

    long startTime = System.currentTimeMillis();
    for (int i = 0; i < messageCount; ++i)
        futures.add(executorService.submit(new SynchronousRequestor(this.template)));
    LOG.info("Time to submit synchronous messages: {}", (System.currentTimeMillis() - startTime) / 1000.0f);

    startTime = System.currentTimeMillis();
    for (Future<String> future : futures) {
        String response = future.get(10000, TimeUnit.MILLISECONDS);
        if ("RESPONSE".equals(response))
            ++received;// w  w w.j a v  a  2 s  .  com
    }
    float elapsedTime = (System.currentTimeMillis() - startTime) / 1000.0f;
    int maxPoolSize = this.camelContext.getExecutorServiceManager().getDefaultThreadPoolProfile()
            .getMaxPoolSize();
    LOG.info("Time to receive synchronous messages: {}", elapsedTime);

    Assert.assertEquals(messageCount, received);
    //Assuming 1 second delay per message, elapsed time shouldn't exceed the number of messages sent 
    //dividied by the number of messages that can be simultaneously consumed.
    Assert.assertTrue(
            String.format("Possible performance issue: %d messages took %f seconds with %d consumers",
                    messageCount, elapsedTime, maxPoolSize),
            elapsedTime < (messageCount / (double) maxPoolSize) + 1);
}

---

From source file:org.rifidi.edge.ale.esper.timer.Timer.java

/**
 * Constructor./*from w  ww . j a  va  2s  . com*/
 * 
 * @param startTriggers
 * @param stopTriggers
 * @param esper
 */
public Timer(Set<Trigger> startTriggers, Set<Trigger> stopTriggers, EPServiceProvider esper) {
    logger.debug("New timer created. ");
    executor = new ScheduledThreadPoolExecutor(2);
    EventSender startSender = esper.getEPRuntime().getEventSender("StartEvent");
    EventSender stopSender = esper.getEPRuntime().getEventSender("StopEvent");
    for (Trigger trigger : startTriggers) {
        trigger.setTarget(this);
        trigger.setEventSender(startSender);
        trigger.setStart(true);
    }
    for (Trigger trigger : stopTriggers) {
        trigger.setTarget(this);
        trigger.setEventSender(stopSender);
        trigger.setStart(false);
    }
    for (Trigger trigger : startTriggers) {
        logger.debug("start trigger created: " + trigger.getPeriod() + " ms");
        executor.scheduleAtFixedRate(trigger, trigger.getDelayToNextExec(), trigger.getPeriod(),
                TimeUnit.MILLISECONDS);
    }
    for (Trigger trigger : stopTriggers) {
        logger.debug("stop trigger created: " + trigger.getPeriod() + " ms");
        executor.scheduleAtFixedRate(trigger, trigger.getDelayToNextExec(), trigger.getPeriod(),
                TimeUnit.MILLISECONDS);
    }
}

---

From source file:org.apache.camel.component.zeromq.ZeroMQConsumer.java

public ZeroMQConsumer(DefaultEndpoint endpoint, Processor processor) {
    super(endpoint, processor);
    this.concurrentConsumers = ((ZeroMQEndpoint) endpoint).getConcurrentConsumers();
    this.tasks = new Task[concurrentConsumers];
    this.executor = new ScheduledThreadPoolExecutor(concurrentConsumers);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• »