Example usage for java.util.concurrent Executors newScheduledThreadPool

List of usage examples for java.util.concurrent Executors newScheduledThreadPool

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Introduction

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

Prototype

public static ScheduledExecutorService newScheduledThreadPool(int corePoolSize)

Source Link

Document

Creates a thread pool that can schedule commands to run after a given delay, or to execute periodically.

Usage

From source file:bjerne.gallery.service.impl.VideoBatchConversionJob.java

@PostConstruct
public void startBatchService() {
    executor = Executors.newScheduledThreadPool(1);
    Runnable batchJob = () -> runBatchJob();
    executor.scheduleAtFixedRate(batchJob, initialDelaySeconds, waitPeriodSeconds, TimeUnit.SECONDS);
}

From source file:ai.grakn.engine.tasks.manager.StandaloneTaskManager.java

public StandaloneTaskManager(EngineID engineId) {
    this.engineID = engineId;
    instantiatedTasks = new ConcurrentHashMap<>();
    stateStorage = new TaskStateInMemoryStore();
    stateUpdateLock = new ReentrantLock();

    ConfigProperties properties = ConfigProperties.getInstance();
    schedulingService = Executors.newScheduledThreadPool(1);
    executorService = Executors.newFixedThreadPool(properties.getAvailableThreads());
}

From source file:eu.vital.vitalcep.collector.Collector.java

private Collector() throws IOException {

    ConfigReader configReader = ConfigReader.getInstance();

    mongoURL = configReader.get(ConfigReader.MONGO_URL);
    mongoDB = configReader.get(ConfigReader.MONGO_DB);

    getCollectorList();/*from   ww w.  j  a v  a 2 s  .  c  om*/

    ScheduledExecutorService exec = Executors.newScheduledThreadPool(2);

    Runnable collectoRunnable;
    collectoRunnable = new Runnable() {
        @Override
        public void run() {

            if (sensors.length() > 0) {
                mongo = new MongoClient(new MongoClientURI(mongoURL));
                db = mongo.getDatabase(mongoDB);
            }

            Date NOW = new Date();
            String nowString = getXSDDateTime(NOW);
            for (int i = 0; i < sensors.length(); i++) {
                try {
                    String cookie = getListenerCredentials(i);

                    JSONArray aData = new JSONArray();
                    String type = sensors.getJSONObject(i).getString("cepType");
                    if (type.equals("CONTINUOUS")) {
                        try {
                            DMSListener oDMS = new DMSListener(cookie);

                            aData = oDMS.getObservations(sensors.getJSONObject(i).getJSONArray("sources"),
                                    sensors.getJSONObject(i).getJSONArray("properties"),
                                    sensors.getJSONObject(i).getString("lastRequest"));

                        } catch (IOException | KeyManagementException | NoSuchAlgorithmException
                                | KeyStoreException ex) {
                            java.util.logging.Logger.getLogger(Collector.class.getName()).log(Level.SEVERE,
                                    null, ex);
                        }

                        if (aData.length() > 0) {
                            sendData2CEP(aData, i);
                        }

                    } else {
                        try {

                            JSONObject sensor = new JSONObject();
                            sensor = sensors.getJSONObject(i);
                            JSONArray requests = new JSONArray();
                            requests = sensor.getJSONArray("requests");
                            PPIListener oPPI = new PPIListener(cookie);

                            aData = oPPI.getObservations(requests, sensor.getString("lastRequest"));

                            if (aData.length() > 0) {
                                sendData2CEP(aData, i);
                            }

                        } catch (IOException | KeyManagementException | NoSuchAlgorithmException
                                | KeyStoreException ex) {
                            java.util.logging.Logger.getLogger(Collector.class.getName()).log(Level.SEVERE,
                                    null, ex);
                        }

                    }

                    sensors.getJSONObject(i).put("lastRequest", nowString);
                    if (mongo == null)
                        mongo = new MongoClient(new MongoClientURI(mongoURL));
                    if (db == null)
                        db = mongo.getDatabase(mongoDB);

                    Bson filter = Filters.eq("_id", new ObjectId(sensors.getJSONObject(i).getString("id")));

                    Bson update = new Document("$set", new Document("lastRequest", nowString));

                    UpdateOptions options = new UpdateOptions().upsert(false);

                    UpdateResult updateDoc = db.getCollection("cepinstances").updateOne(filter, update,
                            options);

                } catch (GeneralSecurityException | IOException | ParseException ex) {
                    java.util.logging.Logger.getLogger(Collector.class.getName()).log(Level.SEVERE, null, ex);
                } finally {
                    if (db != null)
                        db = null;
                    if (mongo != null) {
                        mongo.close();
                        mongo = null;
                    }
                }

            }
            if (db != null)
                db = null;
            if (mongo != null) {
                mongo.close();
                mongo = null;
            }
        }

        private void sendData2CEP(JSONArray aData, int i) throws JSONException, ParseException {
            Decoder decoder = new Decoder();
            ArrayList<String> simpleEventAL = decoder.JsonldArray2DolceInput(aData);
            MqttAllInOne oMqtt = new MqttAllInOne();
            TMessageProc MsgProcc = new TMessageProc();

            //TODO: check the client name. see from cep instances and what happen when if the topic exist 
            String clientName = "collector_" + RandomStringUtils.randomAlphanumeric(4);

            oMqtt.sendMsg(MsgProcc, clientName, simpleEventAL, sensors.getJSONObject(i).getString("mqin"),
                    sensors.getJSONObject(i).getString("mqout"), true);

        }

        private String getListenerCredentials(int i)
                throws IOException, GeneralSecurityException, JSONException {
            StringBuilder ck = new StringBuilder();
            Security slogin = new Security();
            JSONObject credentials = new JSONObject();
            //                Boolean token = slogin.login(sensors.getJSONArray(i)
            //                        .getJSONObject(0)
            //                        .getString("username")
            //                        ,decrypt(sensors.getJSONArray(i)
            //                                .getJSONObject(0)
            //                                .getString("password")),false,ck);
            Boolean token = slogin.login("elisa", "elisotas1", false, ck);
            if (!token) {
                //throw new

            }
            String cookie = ck.toString();
            return cookie;
        }
    };

    exec.scheduleAtFixedRate(collectoRunnable, 0, 10, TimeUnit.SECONDS);

}

From source file:org.openmrs.module.xdsbrepository.XDSbRepositoryInterfaceActivator.java

/**
 * @see ModuleActivator#started()// www .  ja  v a 2  s.  co m
 */
public void started() {
    XDSAudit.setAuditLogger(Context.getService(AtnaAuditService.class).getLogger());
    XDSAudit.logApplicationActivity(AtnaConfiguration.getInstance().getDeviceName(),
            EventTypeCode.ApplicationStart, true);
    log.info("XDSb Repository Interface Module started");

    AdministrationService as = Context.getAdministrationService();
    boolean async = Boolean
            .parseBoolean(as.getGlobalProperty(XDSbServiceConstants.XDS_REPOSITORY_DISCRETE_HANDLER_ASYNC));
    int pollPeriod = Integer.parseInt(Context.getAdministrationService()
            .getGlobalProperty(XDSbServiceConstants.XDS_REPOSITORY_DISCRETE_HANDLER_ASYNC_POLL_PERIOD, "100"));

    if (async) {
        Integer maxTasks = Integer.parseInt(
                as.getGlobalProperty(XDSbServiceConstants.XDS_REPOSITORY_DISCRETE_HANDLER_ASYNC_MAX_TASKS));
        ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool(maxTasks);
        // for each thread schedule a recurring task
        for (int i = 0; i < maxTasks; i++) {
            scheduledExecutorService.scheduleWithFixedDelay(new DiscreteDataProcessorTask(), pollPeriod,
                    pollPeriod, TimeUnit.MILLISECONDS);
        }
    }
}

From source file:ai.grakn.engine.backgroundtasks.standalone.StandaloneTaskManager.java

private StandaloneTaskManager() {
    instantiatedTasks = new ConcurrentHashMap<>();
    stateStorage = InMemoryStateStorage.getInstance();
    stateUpdateLock = new ReentrantLock();

    ConfigProperties properties = ConfigProperties.getInstance();
    schedulingService = Executors.newScheduledThreadPool(1);
    executorService = Executors.newFixedThreadPool(properties.getAvailableThreads());
}

From source file:org.obp.local.LocalObpInstance.java

@PostConstruct
public void init() {
    attachInstrument(nmeaGpsReceiver);//from  w w  w  . ja  v a 2  s . c  o m
    attachInstrument(nmeaWindVane);
    attachInstrument(defaultDataInstrument);//new DefaultDataInstrument("/defaults.properties"));
    attachInstrument(new SystemTimeInstrument());
    attachExplorer(new DummyRadar());

    scanner = Executors.newScheduledThreadPool(1);

    randomizeIntendedRoute();
    maritimeCloudAgent.connect(createPositionReader(), intendedRouteRef, this);
    if (maritimeCloudAgent.isConnected()) {
        if (config.isRemoteWeatherScanner()) {
            attachInstrument(new RemoteWeatherInstrument(scanner, maritimeCloudAgent));
        } else {
            maritimeCloudAgent.registerService(new WeatherService(this));
        }
    }

    //initRemoteBodies();

    logger.info("init local OBP instance:\n\n" + toString() + "\n");
}

From source file:org.apache.hama.bsp.BSPTask.java

public BSPTask() {
    this.pingService = Executors.newScheduledThreadPool(1);
}

From source file:org.openspaces.example.data.feeder.JMSDataFeeder.java

@PostConstruct
public void construct() {
    System.out.println("--- STARTING FEEDER WITH CYCLE [" + defaultDelay + "]");
    if (instanceId != null) {
        // have a range of ids based on the instance id of the processing unit
        startIdFrom = instanceId * 100000000;
    }/*ww w  .  j ava 2  s  .co  m*/
    executorService = Executors.newScheduledThreadPool(1);
    dataFeederTask = new JMSDataFeederTask();
    sf = executorService.scheduleAtFixedRate(dataFeederTask, defaultDelay, defaultDelay, TimeUnit.MILLISECONDS);
}

From source file:org.verwandlung.voj.judger.application.ApplicationBootstrap.java

/**
 * ?Web?.//from  ww  w.  j a v  a2  s . c o m
 * ?Web???Keep-Alive?.
 */
private void setupHeartBeat() {
    final int INITIAL_DELAY = 0;
    final int PERIOD = 25;

    ApplicationHeartbeat heartbeat = applicationContext.getBean(ApplicationHeartbeat.class);
    ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
    scheduler.scheduleAtFixedRate(heartbeat, INITIAL_DELAY, PERIOD, TimeUnit.MINUTES);
}