Example usage for java.util Queue poll

Introduction

In this page you can find the example usage for java.util Queue poll.

Prototype

E poll();

Source Link

Document

Retrieves and removes the head of this queue, or returns null if this queue is empty.

Usage

From source file:tasly.greathealth.thirdparty.order.OrderCommandsStorage.java

public synchronized OrderCommand getOrderCommand(final ChannelSource channelSource, final EventType eventType) {
    OrderCommand result = null;//www  . ja  va  2  s  . c  o  m
    final Map<EventType, Queue<OrderCommand>> sourceCmds = commands.get(channelSource);
    if (sourceCmds == null) {
        return null;
    }

    final Queue<OrderCommand> cmds = sourceCmds.get(eventType);
    if (cmds != null) {
        result = cmds.poll();
        final StoragePara para = new StoragePara();
        para.eventType = eventType;
        para.channelSource = channelSource;
    }
    return result;
}

From source file:org.languagetool.rules.AbstractCompoundRule.java

private void addToQueue(AnalyzedTokenReadings token, Queue<AnalyzedTokenReadings> prevTokens) {
    boolean inserted = prevTokens.offer(token);
    if (!inserted) {
        prevTokens.poll();
        prevTokens.offer(token);//from   www. j a  va 2  s  .c  o  m
    }
}

From source file:ubic.gemma.core.job.progress.ProgressStatusServiceImpl.java

@Override
public synchronized List<ProgressData> getProgressStatus(String taskId) {
    if (taskId == null)
        throw new IllegalArgumentException("task id cannot be null");
    SubmittedTask<?> task = taskRunningService.getSubmittedTask(taskId);

    List<ProgressData> statusObjects = new Vector<>();

    if (task == null) {
        ProgressStatusServiceImpl.log.warn(
                "It looks like job " + taskId + " has gone missing; assuming it is dead or finished already");

        // We should assume it is dead.
        ProgressData data = new ProgressData();
        data.setTaskId(taskId);// w w  w  .java2  s  . co m
        data.setDone(true);
        data.setDescription("The job has gone missing; it has already finished or failed.");
        statusObjects.add(data);

        return statusObjects;
    }

    assert task.getTaskId() != null;
    assert task.getTaskId().equals(taskId);

    Queue<String> updates = task.getProgressUpdates();
    StringBuilder progressMessage = new StringBuilder();
    while (!updates.isEmpty()) {
        String update = updates.poll();
        progressMessage.append(update).append("\n");
    }

    if (task.isDone()) {
        ProgressData data;
        switch (task.getStatus()) {
        case COMPLETED:
            ProgressStatusServiceImpl.log.debug("Job " + taskId + " is done");
            data = new ProgressData(taskId, 1, progressMessage + "Done!", true);
            break;
        case FAILED:
            data = new ProgressData(taskId, 1, progressMessage + "Failed!", true);
            data.setFailed(true);
            break;
        default:
            data = new ProgressData(taskId, 1, progressMessage + "Possibly canceled.", true);
            break;
        }
        statusObjects.add(data);
    } else {
        statusObjects.add(new ProgressData(taskId, 1, progressMessage.toString(), false));
    }

    return statusObjects;
}

From source file:org.jbpm.services.task.jaxb.ComparePair.java

public void recursiveCompare() {
    Queue<ComparePair> compares = new LinkedList<ComparePair>();
    compares.add(this);
    while (!compares.isEmpty()) {
        compares.addAll(compares.poll().compare());
    }/*from w w w .j av a 2 s. com*/
}

From source file:org.apache.synapse.transport.passthru.DeliveryAgent.java

public void errorConnecting(HttpRoute route, int errorCode, String message) {
    Queue<MessageContext> queue = waitingMessages.get(route);
    if (queue != null) {
        MessageContext msgCtx = queue.poll();

        if (msgCtx != null) {
            targetErrorHandler.handleError(msgCtx, errorCode, "Error connecting to the back end", null,
                    ProtocolState.REQUEST_READY);
            synchronized (msgCtx) {
                msgCtx.setProperty(PassThroughConstants.WAIT_BUILDER_IN_STREAM_COMPLETE, Boolean.TRUE);
                msgCtx.notifyAll();//from  w  w w. java2s.c  o  m
            }
        }
    } else {
        throw new IllegalStateException("Queue cannot be null for: " + route);
    }
}

From source file:com.wolvereness.overmapped.lib.MultiProcessor.java

@Override
public void shutdown() {
    if (shutdown)
        return;//from ww  w  .  jav a  2  s .c om
    super.shutdown();

    final Queue<Task<?>> queue = this.queue;
    while (true) {
        final Task<?> task = queue.poll();
        if (task != null) {
            task.cancel(false);
        } else {
            break;
        }
    }
    for (final Thread thread : threads) {
        thread.interrupt();
    }
}

From source file:org.lunarray.model.descriptor.scanner.AnnotationScannerUtil.java

/**
 * Transitively tests for marker marks./* w  w w.j  av  a 2s .  c  o  m*/
 * 
 * @param marker
 *            The marker.
 * @param processed
 *            The processed annotations.
 * @param process
 *            The annotations to process.
 * @return True if and only if the marker marks any of the processed
 *         annotations.
 */
private boolean isMarkedTransiviteProcess(final Class<? extends Annotation> marker,
        final Set<Class<? extends Annotation>> processed, final Queue<Class<? extends Annotation>> process) {
    boolean marked = false;
    while (!process.isEmpty()) {
        final Class<? extends Annotation> poll = process.poll();
        processed.add(poll);
        if (poll.equals(marker)) {
            marked = true;
            process.clear();
        } else {
            for (final Annotation annotation : poll.getAnnotations()) {
                final Class<? extends Annotation> annotationType = annotation.annotationType();
                if (!processed.contains(annotationType)) {
                    process.add(annotationType);
                }
            }
        }
    }
    return marked;
}

From source file:com.liferay.server.manager.internal.executor.PluginExecutor.java

@Override
public void executeDelete(HttpServletRequest request, JSONObject responseJSONObject, Queue<String> arguments)
        throws Exception {

    String context = arguments.poll();

    DeployManagerUtil.undeploy(context);
}

From source file:org.auraframework.test.util.PooledRemoteWebDriverFactory.java

@Override
public synchronized WebDriver get(final DesiredCapabilities capabilities) {
    // default to use a pooled instance unless the test explicitly requests a brand new instance
    Object reuseBrowser = capabilities.getCapability(WebDriverProvider.REUSE_BROWSER_PROPERTY);
    if ((reuseBrowser != null) && (reuseBrowser.equals(false))) {
        return super.get(capabilities);
    }/*  w  w  w .ja  v a 2 s .co m*/

    Queue<PooledRemoteWebDriver> pool = pools.get(capabilities);

    if (pool == null) {
        pool = new LinkedList<>();
        pools.put(capabilities, pool);
    }

    if (pool.size() > 0) {
        return pool.poll();
    } else {
        final Queue<PooledRemoteWebDriver> thisPool = pool;
        return retry(new Callable<WebDriver>() {
            @Override
            public WebDriver call() throws Exception {
                return new PooledRemoteWebDriver(thisPool, serverUrl, capabilities);
            }
        }, MAX_GET_RETRIES, getGetDriverTimeout(capabilities), "Failed to get a new PooledRemoteWebDriver");
    }
}

From source file:edu.toronto.cs.phenotips.solr.HPOScriptService.java

/**
 * Get the HPO IDs of the specified phenotype and all its ancestors.
 * /*from www  .ja  va  2  s.  co  m*/
 * @param id the HPO identifier to search for, in the {@code HP:1234567} format
 * @return the full set of ancestors-or-self IDs, or an empty set if the requested ID was not found in the index
 */
public Set<String> getAllAncestorsAndSelfIDs(final String id) {
    Set<String> results = new HashSet<String>();
    Queue<SolrDocument> nodes = new LinkedList<SolrDocument>();
    SolrDocument crt = this.get(id);
    if (crt == null) {
        return results;
    }
    nodes.add(crt);
    while (!nodes.isEmpty()) {
        crt = nodes.poll();
        results.add(String.valueOf(crt.get(ID_FIELD_NAME)));
        @SuppressWarnings("unchecked")
        List<String> parents = (List<String>) crt.get("is_a");
        if (parents == null) {
            continue;
        }
        for (String pid : parents) {
            nodes.add(this.get(StringUtils.substringBefore(pid, " ")));
        }
    }
    return results;
}