Example usage for java.util.concurrent ScheduledExecutorService scheduleAtFixedRate

Introduction

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

Prototype

public ScheduledFuture<?> scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit);

Source Link

Document

Submits a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is, executions will commence after initialDelay , then initialDelay + period , then initialDelay + 2 * period , and so on.

Usage

From source file:io.soabase.core.SoaBundle.java

private void startDiscoveryHealth(SoaDiscovery discovery, SoaConfiguration soaConfiguration,
        Environment environment) {
    SoaDiscoveryHealth discoveryHealth = checkManaged(environment,
            soaConfiguration.getDiscoveryHealthFactory().build(soaConfiguration, environment));
    ScheduledExecutorService service = environment.lifecycle()
            .scheduledExecutorService("DiscoveryHealthChecker-%d").build();
    service.scheduleAtFixedRate(
            new HealthCheckIntegration(environment.healthChecks(), discovery, discoveryHealth),
            soaConfiguration.getDiscoveryHealthCheckPeriodMs(),
            soaConfiguration.getDiscoveryHealthCheckPeriodMs(), TimeUnit.MILLISECONDS);
}

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From source file:net.sf.mpaxs.spi.computeHost.Host.java

/**
 * Meldet diesen Host beim Masterserver an. Nach erfolgreicher Anmeldung
 * kann der Masterserver Jobs an diesen Host vergeben.
 *///from  w  w  w  .j av  a2s. c  om
private void connectToMasterServer() {
    final ScheduledExecutorService ses = Executors.newSingleThreadScheduledExecutor();
    final long startUpAt = System.currentTimeMillis();
    final long failAfter = 5000;
    ses.scheduleAtFixedRate(new Runnable() {

        @Override
        public void run() {
            Logger.getLogger(Host.class.getName()).log(Level.FINE,
                    "Trying to connect to MasterServer from IP " + settings.getLocalIp());
            long currentTime = System.currentTimeMillis();
            if (currentTime - startUpAt >= failAfter) {
                Logger.getLogger(Host.class.getName()).log(Level.WARNING,
                        "Waited {0} seconds for MasterServer, shutting down ComputeHost", (failAfter / 1000));
                System.exit(1);
            }
            try {
                Logger.getLogger(Host.class.getName()).log(Level.FINE,
                        "Trying to bind to MasterServer at " + settings.getMasterServerIP() + ":"
                                + settings.getMasterServerPort() + " with name: "
                                + settings.getMasterServerName());
                IRemoteServer remRef = (IRemoteServer) Naming.lookup("//" + settings.getMasterServerIP() + ":"
                        + settings.getMasterServerPort() + "/" + settings.getMasterServerName());
                settings.setRemoteReference(remRef);
                UUID hostID = remRef.addHost(authToken, settings.getName(), settings.getLocalIp(),
                        settings.getCores());
                settings.setHostID(hostID);
                Logger.getLogger(Host.class.getName()).log(Level.FINE, "Connection to server established!");
                ses.shutdown();
                try {
                    ses.awaitTermination(5, TimeUnit.SECONDS);
                } catch (InterruptedException ex) {
                    Logger.getLogger(Host.class.getName()).log(Level.SEVERE, null, ex);
                }
            } catch (NotBoundException ex) {
                Logger.getLogger(Host.class.getName()).log(Level.INFO,
                        "Master server not found, waiting for connection!");
                //Logger.getLogger(Host.class.getName()).log(Level.SEVERE, null, ex);
            } catch (MalformedURLException ex) {
                Logger.getLogger(Host.class.getName()).log(Level.SEVERE, null, ex);
                System.exit(1);
            } catch (RemoteException ex) {
                Logger.getLogger(Host.class.getName()).log(Level.SEVERE, null, ex);
                System.exit(1);
            }
        }
    }, 1, settings.getMasterServerTimeout(), TimeUnit.SECONDS);

}

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From source file:com.brienwheeler.lib.concurrent.ExecutorsTest.java

@Test
public void testNewSingleThreadScheduledExecutor() {
    NamedThreadFactory threadFactory = new NamedThreadFactory(THREAD_FACTORY_NAME);
    ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor(threadFactory);

    ScheduledFuture<?> future1 = executor.schedule(new NullRunnable(), 10, TimeUnit.MILLISECONDS);
    ScheduledFuture<Integer> future2 = executor.schedule(new IntCallable(1), 10, TimeUnit.MILLISECONDS);
    ScheduledFuture<?> future3 = executor.scheduleAtFixedRate(new NullRunnable(), 10, 10,
            TimeUnit.MILLISECONDS);
    ScheduledFuture<?> future4 = executor.scheduleWithFixedDelay(new NullRunnable(), 10, 10,
            TimeUnit.MILLISECONDS);

    List<Runnable> notRun = executor.shutdownNow();
    Assert.assertTrue(executor.isShutdown());
    Assert.assertEquals(4, notRun.size());
    Assert.assertTrue(CollectionUtils.containsInstance(notRun, future1));
    Assert.assertTrue(CollectionUtils.containsInstance(notRun, future2));
    Assert.assertTrue(CollectionUtils.containsInstance(notRun, future3));
    Assert.assertTrue(CollectionUtils.containsInstance(notRun, future4));
}

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From source file:com.janrain.backplane.server.config.BackplaneConfig.java

private ScheduledExecutorService createCleanupTask() {
    long cleanupIntervalMinutes;
    logger.info("calling createCleanupTask()");
    try {/*  w w  w . j  av  a 2 s. c  o  m*/
        cleanupIntervalMinutes = Long.valueOf(cachedGet(BpServerProperty.CLEANUP_INTERVAL_MINUTES));
    } catch (SimpleDBException e) {
        throw new RuntimeException("Error getting server property " + BpServerProperty.CLEANUP_INTERVAL_MINUTES,
                e);
    }

    ScheduledExecutorService cleanupTask = Executors.newScheduledThreadPool(1);
    cleanupTask.scheduleAtFixedRate(new Runnable() {
        @Override
        public void run() {

            compileMetrics();

            try {
                getMessagesTime.time(new Callable<Object>() {
                    @Override
                    public Object call() throws Exception {
                        deleteExpiredMessages();
                        return null;
                    }
                });
            } catch (Exception e) {
                logger.error("Error while cleaning up expired messages, " + e.getMessage(), e);
            }

        }

    }, cleanupIntervalMinutes, cleanupIntervalMinutes, TimeUnit.MINUTES);

    return cleanupTask;
}

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From source file:scouter.plugin.server.alert.email.EmailPlugin.java

public EmailPlugin() {
    if (ai.incrementAndGet() == 1) {
        ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);

        //thread count check
        executor.scheduleAtFixedRate(new Runnable() {
            @Override//from   w  ww.java  2s . c om
            public void run() {
                for (int objHash : javaeeObjHashList) {
                    try {
                        if (AgentManager.isActive(objHash)) {
                            ObjectPack objectPack = AgentManager.getAgent(objHash);
                            MapPack mapPack = new MapPack();
                            mapPack.put("objHash", objHash);
                            mapPack = AgentCall.call(objectPack, RequestCmd.OBJECT_THREAD_LIST, mapPack);

                            final int LIMIT = 30; //?  . ? 20 ?    30 ? ?

                            //  .   ?  thread exceed threshold  ?? .
                            int threadCountThreshold = conf.getInt("ext_plugin_thread_count_threshold", LIMIT);
                            int threadCount = mapPack.getList("name").size();

                            /*   ? */
                            if (threadCountThreshold != 0 && threadCount > threadCountThreshold) {
                                AlertPack ap = new AlertPack();

                                //  ? 2  FATAL, ? WARN
                                if (threadCount > threadCountThreshold * 2)
                                    ap.level = AlertLevel.FATAL;
                                else
                                    ap.level = AlertLevel.WARN;

                                ap.objHash = objHash;
                                ap.title = "  !";
                                ap.message = objectPack.objName + "?   " + threadCount
                                        + ", (" + LIMIT + ") !";
                                ap.time = System.currentTimeMillis();
                                ap.objType = objectPack.objType;

                                long limitTime = conf.getLong("ext_plugin_thread_limit_time", 120000); //2
                                long safeTime = conf.getLong("ext_plugin_thread_safe_time", 180000); //3

                                //? ? objectPack.objName ? 
                                if (objectContainer.sendAlert(ap, objectPack.objName, limitTime, safeTime))
                                    alert(ap);
                            }
                        }
                    } catch (Exception e) {
                        // ignore
                    }
                }
            }
        }, 0, 5, TimeUnit.SECONDS); //5 
    }
}

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From source file:com.srotya.monitoring.kafka.util.KafkaConsumerOffsetUtil.java

public void setupMonitoring() {
    ScheduledExecutorService executorService = Executors.newScheduledThreadPool(1);
    executorService.scheduleAtFixedRate(new KafkaConsumerOffsetThread(), 2,
            kafkaConfiguration.getRefreshSeconds(), TimeUnit.SECONDS);
    log.info("Monitoring thread for zookeeper offsets online");
}

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From source file:com.mmj.app.biz.service.impl.UserServiceImpl.java

@PostConstruct
public void cronCache() {
    ScheduledExecutorService newScheduledThreadPool = Executors.newScheduledThreadPool(1);
    newScheduledThreadPool.scheduleAtFixedRate(new Runnable() {

        @Override/*from  w  w w  .  j a v a 2s .c  o  m*/
        public void run() {
            try {
                init();
            } catch (Throwable e) {
                logger.error("init memberCacheMap error", e);
            }
        }

    }, 50, 12 * 60 * 60, TimeUnit.SECONDS);
}

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From source file:com.zb.app.biz.service.impl.TravelCompanyServiceImpl.java

@PostConstruct
public void cronCache() {
    Result companyRegist = notifyService.regist(new NotifyListener() {

        @EventConfig(events = { EventType.companyAdd, EventType.companyDelete, EventType.companyUpdate })
        public void companyEvent(CompanyEvent event) {
            handle(event);//  ww  w  . j  ava 2 s  .  co  m
        }
    });
    if (companyRegist.isFailed()) {
        logger.error("TravelCompanyServiceImpl init companyRegist ?failed!");
    } else {
        logger.error("TravelCompanyServiceImpl init companyRegist ?success!");
    }

    ScheduledExecutorService newScheduledThreadPool = Executors.newScheduledThreadPool(1);
    newScheduledThreadPool.scheduleAtFixedRate(new Runnable() {

        @Override
        public void run() {
            try {
                init();
            } catch (Throwable e) {
                logger.error("init travelCompanyCacheMap error", e);
            }
        }

    }, 0, 12, TimeUnit.HOURS);
}

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From source file:org.apache.storm.grouping.LoadAwareShuffleGroupingTest.java

private void runSimpleBenchmark(LoadAwareCustomStreamGrouping grouper, List<Integer> availableTaskIds,
        LoadMapping loadMapping) {/* w w  w  .ja v  a 2  s .  c  om*/
    // Task Id not used, so just pick a static value
    final int inputTaskId = 100;

    WorkerTopologyContext context = mockContext(availableTaskIds);
    grouper.prepare(context, null, availableTaskIds);

    // periodically calls refreshLoad in 1 sec to simulate worker load update timer
    ScheduledExecutorService refreshService = MoreExecutors
            .getExitingScheduledExecutorService(new ScheduledThreadPoolExecutor(1));
    refreshService.scheduleAtFixedRate(() -> grouper.refreshLoad(loadMapping), 1, 1, TimeUnit.SECONDS);

    long current = System.currentTimeMillis();
    int idx = 0;
    while (true) {
        grouper.chooseTasks(inputTaskId, Lists.newArrayList());

        idx++;
        if (idx % 100000 == 0) {
            // warm up 60 seconds
            if (System.currentTimeMillis() - current >= 60_000) {
                break;
            }
        }
    }

    current = System.currentTimeMillis();
    for (int i = 1; i <= 2_000_000_000; i++) {
        grouper.chooseTasks(inputTaskId, Lists.newArrayList());
    }

    LOG.info("Duration: {} ms", (System.currentTimeMillis() - current));

    refreshService.shutdownNow();
}

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From source file:ecg.ecgshow.ECGShowUI.java

private void createBloodOxygenData(long timeZone) {
    BloodOxygendatas = new short[2];
    BloodOxygenData = new JPanel();
    BloodOxygenData.setLayout(new FlowLayout());
    BloodOxygenData.setBounds(0, 0, (int) (WIDTH * 0.14), (int) (HEIGHT * 0.15));
    BloodOxygenData.setBackground(Color.BLACK);

    JLabel jLabel1 = new JLabel("---");
    if (BloodOxygendatas[0] == 0x00 || BloodOxygendatas == null) {
        jLabel1.setText("---");
    } else {//from  w w w  .  j ava  2s .com
        jLabel1.setText(Short.toString((short) BloodOxygendatas[0]));
    }
    System.out.println("BloodOxygendatas" + Short.toString(BloodOxygendatas[0]));
    jLabel1.setFont(loadFont("LED.tff", (float) (HEIGHT * 0.070)));
    jLabel1.setBackground(Color.BLACK);
    jLabel1.setForeground(Color.GREEN);
    jLabel1.setBounds(0, 0, 100, 100);
    jLabel1.setOpaque(true);

    JLabel jLabelName = new JLabel(" ");
    jLabelName.setFont(new Font("SansSerif", 0, (int) (HEIGHT * 0.020)));
    jLabelName.setBackground(Color.BLACK);
    jLabelName.setForeground(new Color(237, 65, 43));
    jLabelName.setBounds(0, 0, 100, 100);
    jLabelName.setOpaque(true); //??

    JLabel jLabelUnit = new JLabel(" %");
    jLabelUnit.setFont(new Font("SansSerif", 0, (int) (HEIGHT * 0.020)));
    jLabelUnit.setBackground(Color.BLACK);
    jLabelUnit.setForeground(Color.GREEN);
    jLabelUnit.setBounds(0, 0, 100, 100);
    jLabelUnit.setOpaque(true); //??

    BloodOxygenData.add(jLabelName);
    BloodOxygenData.add(jLabel1);
    BloodOxygenData.add(jLabelUnit);

    ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
    scheduledExecutorService.scheduleAtFixedRate(new Runnable() {
        @Override
        public void run() {
            if (BloodOxygendatas[0] == 0 || HeartRatedatas[0] == -100) {
                jLabel1.setText("--");
            } else {
                jLabel1.setText(String.valueOf(BloodOxygendatas[0]));
            }
            BloodOxygenData.repaint();
        }
    }, 0, 3, TimeUnit.SECONDS);
}

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