Example usage for java.util.concurrent LinkedBlockingQueue LinkedBlockingQueue

Introduction

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

Prototype

public LinkedBlockingQueue(Collection<? extends E> c) 

Source Link

Document

Creates a LinkedBlockingQueue with a capacity of Integer#MAX_VALUE , initially containing the elements of the given collection, added in traversal order of the collection's iterator.

Usage

From source file:org.openiot.gsn.http.rest.RestStreamHanlder.java

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException {

    Object is2ndPass = request.getAttribute("2ndPass");
    Continuation continuation = ContinuationSupport.getContinuation(request);

    if (continuation.isExpired()) {
        logger.debug("Continuation has expired.");
        return;//from  www  . j a  v a 2  s .c  o m
    }

    String[] cred = null;
    if (Main.getContainerConfig().isAcEnabled()) {
        cred = parseAuthorizationHeader(request);
        if (cred == null) {
            try {
                response.setHeader("WWW-Authenticate", "Basic realm=\"GSN Access Control\"");// set the supported challenge
                response.sendError(HttpStatus.SC_UNAUTHORIZED, "Unauthorized access.");
            } catch (IOException e) {
                logger.debug(e.getMessage(), e);
            }
            return;
        }
    }

    if (is2ndPass == null) {
        continuation.setAttribute("2ndPass", Boolean.TRUE);
        continuation.setAttribute("status", new LinkedBlockingQueue<Boolean>(1));
        continuation.setTimeout(-1); // Disable the timeout on the continuation.
        continuation.suspend();
        final DefaultDistributionRequest streamingReq;
        try {
            URLParser parser = new URLParser(request);
            //
            if (Main.getContainerConfig().isAcEnabled()) {
                String vsName = parser.getVSensorConfig().getName();
                if (DataSource.isVSManaged(vsName)) {
                    User user = GeneralServicesAPI.getInstance().doLogin(cred[0], cred[1]);
                    if ((user == null || (!user.isAdmin() && !user.hasReadAccessRight(vsName)))) {
                        response.setHeader("WWW-Authenticate", "Basic realm=\"GSN Access Control\"");// set the supported challenge
                        response.sendError(HttpStatus.SC_UNAUTHORIZED, "Unauthorized access.");
                        return;
                    }
                }
            }
            //
            RestDelivery deliverySystem = new RestDelivery(continuation);
            streamingReq = DefaultDistributionRequest.create(deliverySystem, parser.getVSensorConfig(),
                    parser.getQuery(), parser.getStartTime());
            DataDistributer.getInstance(deliverySystem.getClass()).addListener(streamingReq);
        } catch (Exception e) {
            logger.warn(e.getMessage());
            continuation.complete();
        }
    } else {
        boolean status = false;
        try {
            status = !continuation.getServletResponse().getWriter().checkError();
        } catch (Exception e) {
            logger.debug(e.getMessage(), e);
        }
        continuation.suspend();
        try {
            ((LinkedBlockingQueue<Boolean>) continuation.getAttribute("status")).put(status);
        } catch (InterruptedException e) {
            logger.debug(e.getMessage(), e);
        }
    }
}

---

From source file:org.addsimplicity.anicetus.io.jms.JMSDeliveryAdapter.java

/**
 * Called by Spring once all properties have been set. This method will
 * establish the connection to the JMS broker.
 *//*from w w  w  .  j ava2s. c  o m*/
public void afterPropertiesSet() throws Exception {
    BlockingQueue<Runnable> q = new LinkedBlockingQueue<Runnable>(m_maxDeliveryQueue);
    m_executor = new ThreadPoolExecutor(1, m_maxDeliveryThreads, 60l, TimeUnit.SECONDS, q,
            new DeliveryThreadFactory(), m_rejectionHandler);

    m_template = new JmsTemplate(m_connectionFactory);
    m_template.setDefaultDestination(m_destination);
    m_template.setMessageConverter(m_messageConverter);
}

---

From source file:com.isthari.spring.cloud.config.cassandra.CassandraEnvironmentRepository.java

public CassandraEnvironmentRepository(ConfigurableEnvironment environment, String hostnames, String username,
        String password, Boolean createSchema) {

    // Create cluster object
    Cluster.Builder builder = Cluster.builder();
    // Add contact points
    for (String hostname : hostnames.split(",")) {
        builder.addContactPoints(hostname);
    }// www.ja  v a 2  s. c  o  m

    if (username != null && password != null) {
        builder.withCredentials(username, password);
    }
    Cluster cluster = builder.build();

    if (createSchema) {
        this.createSchema(cluster);
    }

    // Connect
    session = cluster.connect("cloud_config");
    this.stmtGetVersion = session.prepare(
            "select version from application_label_version where application=? and label=? and profile=? limit 1");
    this.stmtGetSnapshot = session
            .prepare("select parameters from configuration_snapshot where application=? and version=?");

    // Executor for async tasks
    BlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>(10);
    executor = new ThreadPoolExecutor(4, 10, 1, TimeUnit.DAYS, workQueue);
}

---

From source file:c3.ops.priam.aws.S3FileSystem.java

@Inject
public S3FileSystem(Provider<AbstractBackupPath> pathProvider, ICompression compress,
        final IConfiguration config, ICredential cred) {
    this.pathProvider = pathProvider;
    this.compress = compress;
    this.config = config;
    int threads = config.getMaxBackupUploadThreads();
    LinkedBlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>(threads);
    this.executor = new BlockingSubmitThreadPoolExecutor(threads, queue, UPLOAD_TIMEOUT);
    double throttleLimit = config.getUploadThrottle();
    rateLimiter = RateLimiter.create(throttleLimit < 1 ? Double.MAX_VALUE : throttleLimit);

    MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
    String mbeanName = MBEAN_NAME;
    try {//from w ww  .  j av  a  2  s  . c o m
        mbs.registerMBean(this, new ObjectName(mbeanName));
    } catch (Exception e) {
        logger.warn("Fail to register " + mbeanName);
        //throw new RuntimeException(e);
    }

    s3Client = new AmazonS3Client(cred.getAwsCredentialProvider());
    s3Client.setEndpoint(getS3Endpoint());
}

---

From source file:algo.ad.feeder.TwitterStreamSpout.java

@Override
public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
    queue = new LinkedBlockingQueue<Status>(1000);
    _collector = collector;// w w  w  . ja va  2 s. c om
    startTime = System.currentTimeMillis();
    StatusListener listener = new StatusListener() {

        @Override
        public void onStatus(Status status) {
            long elapsedTime = System.currentTimeMillis() - startTime;
            //System.out.println("*************elapsedTime:" + elapsedTime);
            if (elapsedTime > keywordRefreshInterval) {

                ///   System.out.println("*************Changing Query:");

                // Update the keyword list////////////////////
                String[] temp_keywords = DatabaseHelper.getKeywordsFromDB(tweetsJDBCTemplate, DB_BASE_URL,
                        DB_NAME, MAX_NUMBER_OF_QUERIES);
                if (!keyWords.equals(temp_keywords)) {
                    keyWords = temp_keywords;
                    FilterQuery query = new FilterQuery().track(keyWords);
                    _twitterStream.filter(query);
                }
                // /////////////////////////////////////
                startTime = System.currentTimeMillis();
            }
            queue.offer(status);
        }

        @Override
        public void onDeletionNotice(StatusDeletionNotice sdn) {
        }

        @Override
        public void onTrackLimitationNotice(int i) {
        }

        @Override
        public void onScrubGeo(long l, long l1) {
        }

        @Override
        public void onException(Exception ex) {
        }

        @Override
        public void onStallWarning(StallWarning arg0) {
            // TODO Auto-generated method stub

        }

    };

    _twitterStream = new TwitterStreamFactory(new ConfigurationBuilder().setJSONStoreEnabled(true).build())
            .getInstance();

    _twitterStream.addListener(listener);
    _twitterStream.setOAuthConsumer(consumerKey, consumerSecret);
    AccessToken token = new AccessToken(accessToken, accessTokenSecret);
    _twitterStream.setOAuthAccessToken(token);

    keyWords = DatabaseHelper.getKeywordsFromDB(tweetsJDBCTemplate, DB_BASE_URL, DB_NAME,
            MAX_NUMBER_OF_QUERIES);

    if (keyWords.length == 0) {

        _twitterStream.sample();
    }

    else {

        FilterQuery query = new FilterQuery().track(keyWords);

        _twitterStream.filter(query);
    }

}

---

From source file:com.brienwheeler.svc.monitor.telemetry.impl.AsynchronousTelemetryInfoProcessor.java

@Override
protected void onStart() throws InterruptedException {
    super.onStart();

    LinkedBlockingQueue<TelemetryInfo> queue = new LinkedBlockingQueue<TelemetryInfo>(maxCapacity);
    this.queue.set(queue);

    TelemetryInfoProcessThread backgroundThread = new TelemetryInfoProcessThread(queue);
    this.backgroundThread.set(backgroundThread);
    backgroundThread.start();//from  w  w  w.  j  ava2  s.co m
}

---

From source file:com.amazonaws.metrics.internal.cloudwatch.MetricCollectorSupport.java

protected MetricCollectorSupport(CloudWatchMetricConfig config) {
    if (config == null) {
        throw new IllegalArgumentException();
    }// w ww  .  ja  v a2  s.co  m
    this.config = config;
    this.queue = new LinkedBlockingQueue<MetricDatum>(config.getMetricQueueSize());
    this.requestMetricCollector = new RequestMetricCollectorSupport(queue);
    this.serviceMetricCollector = new ServiceMetricCollectorSupport(queue);
}

---

From source file:com.netflix.priam.aws.S3FileSystem.java

@Inject
public S3FileSystem(Provider<AbstractBackupPath> pathProvider, ICompression compress,
        final IConfiguration config, ICredential cred) {
    this.pathProvider = pathProvider;
    this.compress = compress;
    this.config = config;
    int threads = config.getMaxBackupUploadThreads();
    LinkedBlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>(threads);
    this.executor = new BlockingSubmitThreadPoolExecutor(threads, queue, UPLOAD_TIMEOUT);
    double throttleLimit = config.getUploadThrottle();
    rateLimiter = RateLimiter.create(throttleLimit < 1 ? Double.MAX_VALUE : throttleLimit);

    MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
    String mbeanName = MBEAN_NAME;
    try {/*from  ww w . j a v  a 2s. com*/
        mbs.registerMBean(this, new ObjectName(mbeanName));
    } catch (Exception e) {
        throw new RuntimeException(e);
    }

    s3Client = new AmazonS3Client(cred.getAwsCredentialProvider());
    s3Client.setEndpoint(getS3Endpoint());
}

---

From source file:com.alibaba.dubbo.monitor.simple.SimpleMonitorService.java

public SimpleMonitorService() {
    queue = new LinkedBlockingQueue<URL>(
            Integer.parseInt(ConfigUtils.getProperty("dubbo.monitor.queue", "100000")));
    writeThread = new Thread(new Runnable() {
        public void run() {
            while (running) {
                try {
                    write(); // 
                } catch (Throwable t) { // 
                    logger.error("Unexpected error occur at write stat log, cause: " + t.getMessage(), t);
                    try {
                        Thread.sleep(5000); // 
                    } catch (Throwable t2) {
                    }//  w  w  w.ja v  a2 s. co m
                }
            }
        }
    });
    writeThread.setDaemon(true);
    writeThread.setName("DubboMonitorAsyncWriteLogThread");
    writeThread.start();
    chartFuture = scheduledExecutorService.scheduleWithFixedDelay(new Runnable() {
        public void run() {
            try {
                draw(); // 
            } catch (Throwable t) { // 
                logger.error("Unexpected error occur at draw stat chart, cause: " + t.getMessage(), t);
            }
        }
    }, 1, 300, TimeUnit.SECONDS);
    INSTANCE = this;
}

---

From source file:com.amazonaws.mobileconnectors.pinpoint.targeting.TargetingClient.java

/**
 * Initializes a client to manage updating the endpoint profile
 *
 * @param context The {@link PinpointContext}
 *//*www. ja v a  2 s.com*/
public TargetingClient(final PinpointContext context) {
    this(context, new ThreadPoolExecutor(1, 1, 0L, TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<Runnable>(MAX_EVENT_OPERATIONS), new ThreadPoolExecutor.DiscardPolicy()));
}

---

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