Example usage for java.util.concurrent BlockingQueue take

Introduction

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

Prototype

E take() throws InterruptedException;

Source Link

Document

Retrieves and removes the head of this queue, waiting if necessary until an element becomes available.

Usage

From source file:org.pentaho.telemetry.TelemetryEventKeeper.java

/**
 * Takes an event from the event queue and stores it in the file system.
 *
 * @throws InterruptedException//from   w  w w  .  jav  a2s.c om
 */
protected void processEvent() throws InterruptedException {
    BlockingQueue<TelemetryEvent> eventQueue = this.getEventQueue();
    TelemetryEvent event = eventQueue.take();
    try {
        String filename = System.currentTimeMillis() + FILE_EXT;
        FileOutputStream fout = new FileOutputStream(this.getTelemetryDirPath() + "/" + filename);
        ObjectOutputStream oos = new ObjectOutputStream(fout);
        oos.writeObject(event);
        oos.close();
    } catch (FileNotFoundException fnfe) {
        this.getLogger().warn(UNABLE_TO_CREATE_FILE_MESSAGE, fnfe);
    } catch (IOException ioe) {
        this.getLogger().error(ERROR_CREATING_FILE_MESSAGE, ioe);
    }
}

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From source file:fi.jumi.core.suite.SuiteFactoryTest.java

@Test
public void sets_the_context_class_loader_for_test_threads() throws InterruptedException {
    createSuiteFactory();//  w  ww  . ja v  a  2s. c o  m

    factory.start(new NullSuiteListener());
    BlockingQueue<ClassLoader> spy = new LinkedBlockingQueue<>();

    factory.testThreadPool.execute(() -> {
        spy.add(Thread.currentThread().getContextClassLoader());
    });
    ClassLoader contextClassLoader = spy.take();

    assertThat(contextClassLoader, is(factory.testClassLoader));
}

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From source file:com.amazonaws.kinesis.dataviz.twitter.TwitterProducer.java

private boolean process(BlockingQueue<String> msgQueue, ProducerClient producer) {

    int exceptionCount = 0;

    while (true) {
        try {//from   w  w  w.j a  v  a2s  .  c  o  m
            // get message HBC from queue
            String msg = msgQueue.take();

            // use 'random' partition key
            String key = String.valueOf(System.currentTimeMillis());

            // send to Kinesis
            producer.post(key, msg);

        } catch (Exception e) {
            // didn't get record - move on to next\
            e.printStackTrace();

            if (++exceptionCount > 5) {
                // too many exceptions - lets reconnect and try again
                return false;
            }
        }
    }

}

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From source file:gov.pnnl.cloud.producer.twitter.TwitterProducerKinesis.java

private boolean process(BlockingQueue<String> msgQueue, ProducerClient producer, StatisticsCollection stats) {

    int exceptionCount = 0;

    while (true) {
        try {// w w  w  .  jav a 2s. c o m
            // get message HBC from queue
            String msg = msgQueue.take();

            // use 'random' partition key
            String key = String.valueOf(System.currentTimeMillis());

            // send to Kinesis
            producer.post(key, msg);

        } catch (Exception e) {
            // didn't get record - move on to next\
            e.printStackTrace();

            if (++exceptionCount > 5) {
                // too many exceptions - lets reconnect and try again
                return false;
            }
        }
    }

}

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From source file:org.bpmscript.integration.internal.memory.MemorySyncChannel.java

public Object get(String id, long duration) {
    BlockingQueue<Object> blockingQueue = null;
    blockingQueue = replies.get(id);//from w  w w .j  a v  a2  s  .c om
    if (blockingQueue != null) {
        try {
            if (duration > 0) {
                return blockingQueue.poll(duration, TimeUnit.MILLISECONDS);
            } else {
                return blockingQueue.take();
            }
        } catch (InterruptedException e) {
            return null;
        }
    } else {
        return null;
    }
}

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From source file:gov.pnnl.cloud.producer.twitter.TwitterProducerKafka.java

private boolean process(BlockingQueue<String> msgQueue, KafkaProducerClient producer,
        StatisticsCollection stats) {/*from  www .  j ava 2 s .c om*/

    int exceptionCount = 0;

    while (true) {
        try {
            // get message HBC from queue
            String msg = msgQueue.take();

            // use 'random' partition key
            String key = String.valueOf(System.currentTimeMillis());

            // send to Kinesis
            producer.post(key, msg);

        } catch (Exception e) {
            // didn't get record - move on to next\
            e.printStackTrace();

            if (++exceptionCount > 5) {
                // too many exceptions - lets reconnect and try again
                return false;
            }
        }
    }

}

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From source file:org.bpmscript.integration.spring.SpringSyncChannel.java

/**
 * @see org.bpmscript.channel.reply.ISyncService#get(java.lang.String, long)
 *//*w  w w  .  j a  va 2 s.c o m*/
public Object get(String id, long duration) {
    BlockingQueue<Object> blockingQueue = null;
    blockingQueue = replies.get(id);
    if (blockingQueue != null) {
        try {
            if (duration > 0) {
                return blockingQueue.poll(duration, TimeUnit.MILLISECONDS);
            } else {
                return blockingQueue.take();
            }
        } catch (InterruptedException e) {
            return null;
        }
    } else {
        return null;
    }
}

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From source file:gemlite.core.internal.admin.service.ImportDataService.java

@Override
public Object doExecute(Map<String, Object> args) {
    Cache cache = CacheFactory.getAnyInstance();
    String memberId = (String) args.get("MEMBERID");
    String ip = (String) args.get("IP");
    String regionName = (String) args.get("REGIONPATH");
    String filePath = (String) args.get("FILEPATH");
    String showLog = (String) args.get("showLog");
    if (StringUtils.isEmpty(filePath)) {
        filePath = System.getProperty(ITEMS.GS_WORK.name());
    }//from  w  w  w. j a v a  2  s  .  c o m
    if ("ALL".equalsIgnoreCase(regionName)) {
        // ?region,?gfd?
        if (filePath.endsWith(".gfd")) {
            int loc1 = filePath.lastIndexOf("\\");
            int loc2 = filePath.lastIndexOf("/");
            filePath = filePath.substring(0, loc1 > loc2 ? loc1 : loc2);
        }
    }
    if (!filePath.endsWith(".gfd") && !filePath.endsWith("\\") && !filePath.endsWith("/"))
        filePath += File.separator;

    args.put("FILEPATH", filePath);
    DistributedMember targetMember = AdminUtil.getDistributedMemberById(cache, memberId, ip);
    try {
        Set<String> regions = new HashSet<String>();
        if ("ALL".equals(regionName)) {
            regions = AdminUtil.getRegionNames(cache);
        } else {
            regions.add(regionName);
        }
        if (targetMember == null) {
            LogUtil.getAppLog().error("error:targetMember is null!memberId is:" + memberId
                    + " and total members:" + AdminUtil.getAllMemberIds(cache));
            return "error:targetMember is null!memberId is:" + memberId + " and total members:"
                    + AdminUtil.getAllMemberIds(cache);
        }
        if (regions == null || regions.isEmpty()) {
            LogUtil.getAppLog().error("error:regions is empty!");
            return "error:regions is empty!";
        }
        // region?
        for (String r : regions) {
            Execution execution = null;
            String path = filePath;
            if (!filePath.endsWith(".gfd"))
                path += (r + ".gfd");
            args.put("REGIONPATH", r);
            args.put("FILEPATH", path);
            String last = "last";
            MsgCollector msgCollector = new MsgCollector(last);
            execution = FunctionService.onMember(targetMember).withArgs(args).withCollector(msgCollector);
            ResultCollector rc = execution.execute(new ImportDataFunction().getId());
            if ("Y".equals(showLog)) {
                BlockingQueue queue = msgCollector.getResult();
                String msg = "";
                try {
                    // ???
                    while ((msg = (String) queue.take()) != last) {
                        if (LogUtil.getAppLog().isDebugEnabled())
                            LogUtil.getAppLog().debug(" send to client:" + msg);
                        return msg;
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                    LogUtil.getAppLog().error("send msg error:", e);
                    return e.getMessage();
                }
            } else {
                return rc.getResult();
            }
        }
    } catch (CacheClosedException e) {
        e.printStackTrace();
        LogUtil.getAppLog().error("error:CacheClosedException", e);
        return e.getMessage();
    } catch (FunctionInvocationTargetException e) {
        e.printStackTrace();
        LogUtil.getAppLog().error("error:FunctionInvocationTargetException", e);
        return e.getMessage();
    }
    return true;
}

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From source file:org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.java

private void consumerLoop(BlockingQueue<CallRunner> myQueue) {
    boolean interrupted = false;
    try {/*from   w  w  w  .j  a  va2 s  .  c om*/
        while (running) {
            try {
                CallRunner task = myQueue.take();
                try {
                    activeHandlerCount.incrementAndGet();
                    task.run();
                } finally {
                    activeHandlerCount.decrementAndGet();
                }
            } catch (InterruptedException e) {
                interrupted = true;
            }
        }
    } finally {
        if (interrupted) {
            Thread.currentThread().interrupt();
        }
    }
}

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From source file:org.spf4j.recyclable.impl.ObjectPoolVsApache.java

private long testPool(final RetryExecutor<Integer> exec, final RecyclingSupplier<ExpensiveTestObject> pool,
        final BlockingQueue<Future<Integer>> completionQueue) throws InterruptedException, ExecutionException {
    long startTime = System.currentTimeMillis();
    for (int i = 0; i < TEST_TASKS; i++) {
        exec.submit(new TestCallable(pool, i));
    }//  w  w  w. jav a  2 s. c  o  m
    for (int i = 0; i < TEST_TASKS; i++) {
        completionQueue.take().get();
    }
    long elapsedTime = System.currentTimeMillis() - startTime;
    System.out.println("Completed all " + TEST_TASKS + " tasks in " + elapsedTime + "ms ");
    return elapsedTime;
}

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