Example usage for java.lang Thread yield

List of usage examples for java.lang Thread yield

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Introduction

In this page you can find the example usage for java.lang Thread yield.

Prototype

public static native void yield();

Source Link

Document

A hint to the scheduler that the current thread is willing to yield its current use of a processor.

Usage

From source file:org.apache.hadoop.hbase.rest.RowResourceBase.java

protected static Response checkAndDeleteJson(String url, String table, String row, String column,
        String valueToCheck, HashMap<String, String> cellsToDelete) throws IOException, JAXBException {
    RowModel rowModel = new RowModel(row);

    if (cellsToDelete != null) {
        for (Map.Entry<String, String> entry : cellsToDelete.entrySet()) {
            rowModel.addCell(new CellModel(Bytes.toBytes(entry.getKey()), Bytes.toBytes(entry.getValue())));
        }//from  w ww  . j  a  va  2s.co m
    }
    // Add this at the end
    rowModel.addCell(new CellModel(Bytes.toBytes(column), Bytes.toBytes(valueToCheck)));
    CellSetModel cellSetModel = new CellSetModel();
    cellSetModel.addRow(rowModel);
    String jsonString = jsonMapper.writeValueAsString(cellSetModel);
    Response response = client.put(url, Constants.MIMETYPE_JSON, Bytes.toBytes(jsonString));
    Thread.yield();
    return response;
}

From source file:uk.co.real_logic.aeron.tools.ThwackerTool.java

/**
 * Worker thread method that will iterate over the list of subscriptions and call poll()
 *//*from w w  w  . j ava  2 s  .com*/

public void receiveOnSubs() {
    while (running) {
        /* Run through each sub slot sequentially */
        for (final ThwackingElement s : subs) {
            s.tryGetMessages();
        }
        Thread.yield();
        /* Every iteration calls poll() on the control subscription */
        ctrlSub.tryGetMessages();
    }
    allDone.countDown();
    LOG.fine("RecSubs all done!");
}

From source file:org.apache.hadoop.hbase.rest.TestGetAndPutResource.java

@Test
public void testMultiCellGetPutXML() throws IOException, JAXBException {
    String path = "/" + TABLE + "/fakerow"; // deliberate nonexistent row

    CellSetModel cellSetModel = new CellSetModel();
    RowModel rowModel = new RowModel(ROW_1);
    rowModel.addCell(new CellModel(Bytes.toBytes(COLUMN_1), Bytes.toBytes(VALUE_1)));
    rowModel.addCell(new CellModel(Bytes.toBytes(COLUMN_2), Bytes.toBytes(VALUE_2)));
    cellSetModel.addRow(rowModel);//from w  w w  . j  a v a  2  s  .c  om
    rowModel = new RowModel(ROW_2);
    rowModel.addCell(new CellModel(Bytes.toBytes(COLUMN_1), Bytes.toBytes(VALUE_3)));
    rowModel.addCell(new CellModel(Bytes.toBytes(COLUMN_2), Bytes.toBytes(VALUE_4)));
    cellSetModel.addRow(rowModel);
    StringWriter writer = new StringWriter();
    xmlMarshaller.marshal(cellSetModel, writer);
    Response response = client.put(path, Constants.MIMETYPE_XML, Bytes.toBytes(writer.toString()));
    Thread.yield();

    // make sure the fake row was not actually created
    response = client.get(path, Constants.MIMETYPE_XML);
    assertEquals(response.getCode(), 404);

    // check that all of the values were created
    checkValueXML(TABLE, ROW_1, COLUMN_1, VALUE_1);
    checkValueXML(TABLE, ROW_1, COLUMN_2, VALUE_2);
    checkValueXML(TABLE, ROW_2, COLUMN_1, VALUE_3);
    checkValueXML(TABLE, ROW_2, COLUMN_2, VALUE_4);

    response = deleteRow(TABLE, ROW_1);
    assertEquals(response.getCode(), 200);
    response = deleteRow(TABLE, ROW_2);
    assertEquals(response.getCode(), 200);
}

From source file:org.opencms.staticexport.CmsAfterPublishStaticExportHandler.java

/**
 * Exports all non template resources found in a list of published resources.<p>
 * // w w w. j av  a2s  .  c o m
 * @param cms the current cms object
 * @param publishedResources the list of published resources
 * @param report an I_CmsReport instance to print output message, or null to write messages to the log file
 * 
 * @return true if some template resources were found while looping the list of published resources
 * 
 * @throws CmsException in case of errors accessing the VFS
 * @throws IOException in case of errors writing to the export output stream
 * @throws ServletException in case of errors accessing the servlet 
 */
protected boolean exportNonTemplateResources(CmsObject cms, List<CmsPublishedResource> publishedResources,
        I_CmsReport report) throws CmsException, IOException, ServletException {

    report.println(Messages.get().container(Messages.RPT_STATICEXPORT_NONTEMPLATE_RESOURCES_BEGIN_0),
            I_CmsReport.FORMAT_HEADLINE);

    if (LOG.isDebugEnabled()) {
        LOG.debug(Messages.get().getBundle().key(Messages.LOG_EXPORTING_NON_TEMPLATE_1,
                new Integer(publishedResources.size())));
    }

    CmsStaticExportManager manager = OpenCms.getStaticExportManager();
    List<CmsStaticExportData> resourcesToExport = new ArrayList<CmsStaticExportData>();
    boolean templatesFound = readNonTemplateResourcesToExport(cms, publishedResources, resourcesToExport);

    int count = 1;
    int size = resourcesToExport.size();
    if (LOG.isDebugEnabled()) {
        LOG.debug(Messages.get().getBundle().key(Messages.LOG_NUM_EXPORT_1, new Integer(size)));
    }
    // now do the export
    Iterator<CmsStaticExportData> i = resourcesToExport.iterator();
    while (i.hasNext()) {
        CmsStaticExportData exportData = i.next();
        if (LOG.isDebugEnabled()) {
            LOG.debug(Messages.get().getBundle().key(Messages.LOG_EXPORT_FILE_2, exportData.getVfsName(),
                    exportData.getRfsName()));
        }

        report.print(org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_SUCCESSION_2,
                new Integer(count++), new Integer(size)), I_CmsReport.FORMAT_NOTE);
        report.print(Messages.get().container(Messages.RPT_EXPORTING_0), I_CmsReport.FORMAT_NOTE);
        report.print(org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_ARGUMENT_1,
                exportData.getVfsName()));
        report.print(org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_DOTS_0));
        int status = manager.export(null, null, cms, exportData);
        if (status == HttpServletResponse.SC_OK) {
            report.println(org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_OK_0),
                    I_CmsReport.FORMAT_OK);
        } else {
            report.println(
                    org.opencms.report.Messages.get().container(org.opencms.report.Messages.RPT_IGNORED_0),
                    I_CmsReport.FORMAT_NOTE);
        }

        if (LOG.isInfoEnabled()) {
            Object[] arguments = new Object[] { exportData.getVfsName(), exportData.getRfsName(),
                    new Integer(status) };
            LOG.info(Messages.get().getBundle().key(Messages.LOG_EXPORT_FILE_STATUS_3, arguments));
        }
        //don't lock up the CPU exclusively - allow other Threads to run as well 
        Thread.yield();
    }

    resourcesToExport = null;

    report.println(Messages.get().container(Messages.RPT_STATICEXPORT_NONTEMPLATE_RESOURCES_END_0),
            I_CmsReport.FORMAT_HEADLINE);

    return templatesFound;
}

From source file:org.apache.hadoop.hive.metastore.AggregateStatsCache.java

/**
 * Cleans the expired nodes or removes LRU nodes of the cache,
 * until the cache size reduces to cleanUntil% full.
 *//*from   w w w  .  j a  va 2  s  .  co  m*/
private void spawnCleaner() {
    // This spawns a separate thread to walk through the cache and removes expired nodes.
    // Only one cleaner thread should be running at any point.
    synchronized (this) {
        if (isCleaning) {
            return;
        }
        isCleaning = true;
    }
    Thread cleaner = new Thread("AggregateStatsCache-CleanerThread") {
        @Override
        public void run() {
            numRemovedTTL = 0;
            numRemovedLRU = 0;
            long cleanerStartTime = System.currentTimeMillis();
            LOG.info("AggregateStatsCache is " + getFullPercent() + "% full, with " + getCurrentNodes()
                    + " nodes; starting cleaner thread");
            try {
                Iterator<Map.Entry<Key, AggrColStatsList>> mapIterator = cacheStore.entrySet().iterator();
                while (mapIterator.hasNext()) {
                    Map.Entry<Key, AggrColStatsList> pair = (Map.Entry<Key, AggrColStatsList>) mapIterator
                            .next();
                    AggrColStats node;
                    AggrColStatsList candidateList = (AggrColStatsList) pair.getValue();
                    List<AggrColStats> nodes = candidateList.nodes;
                    if (nodes.size() == 0) {
                        mapIterator.remove();
                        continue;
                    }
                    boolean isLocked = false;
                    try {
                        isLocked = candidateList.writeLock.tryLock(maxWriterWaitTime, TimeUnit.MILLISECONDS);
                        if (isLocked) {
                            for (Iterator<AggrColStats> listIterator = nodes.iterator(); listIterator
                                    .hasNext();) {
                                node = listIterator.next();
                                // Remove the node if it has expired
                                if (isExpired(node)) {
                                    listIterator.remove();
                                    numRemovedTTL++;
                                    currentNodes.getAndDecrement();
                                }
                            }
                        }
                    } catch (InterruptedException e) {
                        LOG.debug(e);
                    } finally {
                        if (isLocked) {
                            candidateList.writeLock.unlock();
                        }
                    }
                    // We want to make sure this runs at a low priority in the background
                    Thread.yield();
                }
                // If the expired nodes did not result in cache being cleanUntil% in size,
                // start removing LRU nodes
                while (getCurrentNodes() / maxCacheNodes > cleanUntil) {
                    evictOneNode();
                }
            } finally {
                isCleaning = false;
                LOG.info("Stopping cleaner thread; AggregateStatsCache is now " + getFullPercent()
                        + "% full, with " + getCurrentNodes() + " nodes");
                LOG.info("Number of expired nodes removed: " + numRemovedTTL);
                LOG.info("Number of LRU nodes removed: " + numRemovedLRU);
                LOG.info("Cleaner ran for: " + (System.currentTimeMillis() - cleanerStartTime) + "ms");
            }
        }
    };
    cleaner.setPriority(Thread.MIN_PRIORITY);
    cleaner.setDaemon(true);
    cleaner.start();
}

From source file:net.lightbody.bmp.proxy.jetty.util.ThreadedServer.java

public void stop() throws InterruptedException {
    synchronized (this) {
        // Signal that we are stopping
        _running = false;/*from w ww. j ava 2s. c  o m*/

        // Close the listener socket.
        if (log.isDebugEnabled())
            log.debug("closing " + _listen);
        try {
            if (_listen != null)
                _listen.close();
            _listen = null;
        } catch (IOException e) {
            log.warn(LogSupport.EXCEPTION, e);
        }

        // Do we have an acceptor thread (running or not)
        Thread.yield();
        for (int a = 0; _acceptor != null && a < _acceptor.length; a++) {
            Acceptor acc = _acceptor[a];
            if (acc != null)
                acc.interrupt();
        }
        Thread.sleep(100);

        for (int a = 0; _acceptor != null && a < _acceptor.length; a++) {
            Acceptor acc = _acceptor[a];

            if (acc != null) {
                acc.forceStop();
                _acceptor[a] = null;
            }
        }
    }

    // Stop the thread pool
    try {
        super.stop();
    } catch (Exception e) {
        log.warn(LogSupport.EXCEPTION, e);
    } finally {
        synchronized (this) {
            _acceptor = null;
        }
    }
}

From source file:com.apporiented.hermesftp.client.FtpTestClient.java

private void executeSend(TextSender l) {
    Thread t = new Thread(l);
    t.start();
    while (t.isAlive()) {
        Thread.yield();
    }
}

From source file:org.mule.transport.ldap.functional.MuleEmbeddedTestCase.java

public synchronized void testDispatchReceiveSearchDeleted() throws Exception {
    final MuleClient client = new MuleClient(muleContext);

    final int addCount = 4;
    LDAPAddRequest last = null;/*from   www  .j  ava  2 s  . co  m*/

    for (int i = 0; i < addCount; i++) {
        client.dispatch("ldap://ldap.out", last = TestHelper.getRandomEntryAddRequest(), null);
    }

    Thread.yield();
    Thread.sleep(10000);

    client.dispatch("ldap://ldap.out", new LDAPDeleteRequest(last.getEntry().getDN(), null), null);

    Thread.yield();
    Thread.sleep(10000);

    // we send a message on the endpoint we created, i.e. vm://Single
    client.dispatch("ldap://ldap.out/cn.payload", last.getEntry().getDN(), null);

    Thread.yield();
    Thread.sleep(10000);

    MuleMessage result = null;
    MuleMessage lastResult = null;

    int count = 0;

    // addCount AddResponses, 1x Search Result, 1 delete response
    final int expected = addCount + 1 + 1;

    while (true) {
        result = client.request("ldap://ldap.in", 15000);

        if (result == null) {
            break;
        }

        logger.debug(LDAPUtils.dumpLDAPMessage(result.getPayload()));

        lastResult = result;
        count++;
    }

    assertTrue("Count (" + count + ") != expected (" + expected + ")", count == expected); // fails because of list returnded or
    // processing time to short?
    assertNull(result);
    assertNotNull(lastResult);
    assertTrue("instanceof " + lastResult.getPayload().getClass() + " instead of LDAPResponse",
            lastResult.getPayload() instanceof LDAPResponse);

    // TODO order is not predictable
    // assertTrue(
    // "Check type: "
    // + ((LDAPResponse) lastResult.getPayload()).getType()
    // + " should be " + LDAPMessage.SEARCH_RESULT,
    // ((LDAPResponse) lastResult.getPayload()).getType() ==
    // LDAPMessage.SEARCH_RESULT);

    // is 2xaddresponse, 1 searchresult, 1 addresponse, 1 delresponse, 1
    // addresponse

    try {
        DSManager.getInstance().stop();
    } catch (final Exception e) {

    }

}

From source file:fs.MainWindow.java

public void ExecuteFeatureSelection(int selector) throws IOException {
    String penalization_type = (String) jCB_PenalizationSE.getSelectedItem();
    float alpha = ((Double) jS_AlphaSE.getValue()).floatValue();
    float q_entropy = ((Double) jS_QEntropySE.getValue()).floatValue();
    float beta = ((float) jSliderBetaSE.getValue() / 100);

    //if selected criterion function is CoD, q_entropy = 0
    if (jCB_CriterionFunctionSE.getSelectedIndex() == 1) {
        q_entropy = 0;/*  www . ja  va  2  s.  c om*/
    } //CoD

    if (q_entropy < 0 || alpha < 0) {
        //entrada de dados invalida.
        JOptionPane.showMessageDialog(this,
                "Error on parameter value:The" + " values of q-entropy and Alpha must be positives.",
                "Application Error", JOptionPane.ERROR_MESSAGE);
        return;
    }

    jTA_SaidaSE.setText("");
    jTA_SelectedFeaturesSE.setText("");

    // n = quantidade de valores assumidos pelas caracteristicas.
    int n = Main.maximumValue(Md, 0, lines - 1, 0, columns - 2) + 1;

    //c = numero de rotulos possiveis para as classes.
    int c = Main.maximumValue(Md, 0, lines - 1, columns - 1, columns - 1) + 1;

    jProgressBarSE.setValue(5);
    Thread.yield();

    char[][] strainingset = MathRoutines.float2char(Md);
    char[][] stestset = null;

    if (!jTF_InputTestSE.getText().equals("")) {
        stestset = IOFile.readMatrix(jTF_InputTestSE.getText(), delimiter);
    } else {
        stestset = MathRoutines.float2char(Md);
    }

    int resultsetsize = 1;
    try {
        //vetor com os resultados da selecao de caracteristica.
        resultsetsize = (Integer) jS_MaxResultListSE.getValue();
        if (resultsetsize < 1) {
            Thread.yield();
            JOptionPane
                    .showMessageDialog(this,
                            "Error on parameter value:" + " The Size of the Result List must be a integer value"
                                    + " greater or equal to 1.",
                            "Application Error", JOptionPane.ERROR_MESSAGE);
            return;
        }
    } catch (NumberFormatException error) {
        Thread.yield();
        JOptionPane.showMessageDialog(
                this, "Error on parameter value: The"
                        + " Size of the Result List must be a integer value greater" + " or equal to 1.",
                "Application Error", JOptionPane.ERROR_MESSAGE);
        return;
    }

    /* SELETOR DE CARACTERISTICAS PARA O TREINAMENTO. */
    FS fs = new FS(strainingset, n, c, penalization_type, alpha, beta, q_entropy, resultsetsize);

    jProgressBarSE.setValue(10);
    Thread.yield();

    int maxfeatures = (Integer) jS_MaxSetSizeSE.getValue();
    if (maxfeatures <= 0) {
        JOptionPane.showMessageDialog(this, "Error on parameter value: The"
                + " Maximum Set Size be a integer value greater" + " or equal to 1.", "Application Error",
                JOptionPane.ERROR_MESSAGE);
        return;
    }

    if (selector == 1) {
        fs.runSFS(false, maxfeatures);
        jProgressBarSE.setValue(90);
        Thread.yield();
    } else if (selector == 3) {
        fs.runSFFS(maxfeatures, -1, null);
        jProgressBarSE.setValue(90);
        Thread.yield();
    } else if (selector == 2) {
        fs.runSFS(true, maxfeatures); /* a call to SFS is made in order to get the
                                      //ideal dimension to run the exhaustive search;*/
        int itmax = fs.itmax;
        if (itmax < maxfeatures) {
            itmax = maxfeatures;
        }
        /*calculating the estimated time to be completed in rea
        computer of 2 GHz*/
        int combinations = 0;
        for (int i = 1; i <= itmax; i++) {
            combinations += MathRoutines.numberCombinations(columns - 1, i);
        }
        double estimatedTime = (0.0062 + 3.2334e-7 * strainingset.length) * combinations
                * Math.log(combinations) / Math.log(2);
        int answer = JOptionPane.showConfirmDialog(null,
                "Estimated " + "time to finish: " + estimatedTime + " s.\n Do you want to" + " continue?",
                "Exhaustive Search", JOptionPane.YES_NO_OPTION);
        if (answer == 1) {
            jProgressBarSE.setValue(0);
            return;
        }
        //System.out.println("Estimated time to finish: "+estimatedTime+" s");
        float new_itmax = itmax;
        FS fsPrev = new FS(strainingset, n, c, penalization_type, alpha, beta, q_entropy, resultsetsize);
        for (int i = 1; i <= itmax; i++) {
            System.out.println("Iteration " + i);
            fs = new FS(strainingset, n, c, penalization_type, alpha, beta, q_entropy, resultsetsize);
            fs.itmax = i;
            fs.runExhaustive(0, 0, fs.I);
            //if (fs.hGlobal == 0) {
            //    break;
            //}
            if (fs.hGlobal < fsPrev.hGlobal) {
                fsPrev = fs;
            } else {
                fs = fsPrev;
                break;
            }
            float new_i = i;
            float pb = (new_i / new_itmax);
            pb = (pb * 80.0f);
            jProgressBarSE.setValue(10 + (int) pb);
            Thread.yield();
        }
    }

    /*
    jTA_SelectedFeaturesSE.setText("1st Global Criterion Function Value: " + fs.hGlobal);
    jTA_SelectedFeaturesSE.append("\nSelected Features: ");
    for (int i = 0; i < fs.I.size(); i++) {
    jTA_SelectedFeaturesSE.append(fs.I.elementAt(i) + " ");
    }
     * substituido pelo codigo abaixo para exibir uma lista de resultados
     * de tamanho escolhido pelo usuario.
     */
    for (int i = 0; i < fs.resultlist.size(); i++) {
        float fsvalue = ((Float) fs.resultlist.get(i).get(0));
        if (i == 0) {
            jTA_SelectedFeaturesSE.setText((i + 1) + "st Global Criterion" + " Function Value: " + fsvalue);
        } else if (i == 1) {
            jTA_SelectedFeaturesSE
                    .append("\n\n" + (i + 1) + "nd Global" + " Criterion Function Value: " + fsvalue);
        } else if (i == 2) {
            jTA_SelectedFeaturesSE
                    .append("\n\n" + (i + 1) + "rd Global" + " Criterion Function Value: " + fsvalue);
        } else {
            jTA_SelectedFeaturesSE
                    .append("\n\n" + (i + 1) + "th Global" + " Criterion Function Value: " + fsvalue);
        }
        jTA_SelectedFeaturesSE.append("\nSelected Features: ");
        Vector features = (Vector) fs.resultlist.get(i).get(1);
        for (int j = 0; j < features.size(); j++) {
            jTA_SelectedFeaturesSE.append((Integer) features.get(j) + " ");
        }
    }

    // CLASSIFICADOR.
    Classifier clas = new Classifier();
    clas.classifierTable(strainingset, fs.I, n, c);
    for (int i = 0; i < clas.table.size(); i++) {
        double[] tableLine = (double[]) clas.table.elementAt(i);
        double instance = (Double) clas.instances.elementAt(i);
        System.out.print(instance + " ");
        for (int j = 0; j < c; j++) {
            System.out.print((int) tableLine[j] + " ");
        }
        System.out.println();
    }
    jProgressBarSE.setValue(95);
    Thread.yield();
    double[] instances = clas.classifyTestSamples(stestset, fs.I, n, c);
    jTA_SaidaSE.setText("Correct Labels  -  Classified Labels - "
            + "Classification Instances\n(Considering the first selected" + " features)\n");
    double hits = 0;
    for (int i = 0; i < clas.labels.length; i++) {
        int correct_label = (int) stestset[i][columns - 1];
        int classified_label = (int) clas.labels[i];
        jTA_SaidaSE.append("\n" + correct_label + "  -  " + classified_label + "  -  " + instances[i]);
        if (correct_label == classified_label) {
            hits++;
        }
        Thread.yield();
    }
    double hit_rate = hits / clas.labels.length;
    jTA_SaidaSE.append("\nrate of hits = " + hit_rate);
    jProgressBarSE.setValue(100);
    Thread.yield();
}

From source file:org.apache.hadoop.hbase.rest.RowResourceBase.java

protected static Response checkAndDeleteValuePB(String url, String table, String row, String column,
        String valueToCheck, HashMap<String, String> cellsToDelete) throws IOException {
    RowModel rowModel = new RowModel(row);

    if (cellsToDelete != null) {
        for (Map.Entry<String, String> entry : cellsToDelete.entrySet()) {
            rowModel.addCell(new CellModel(Bytes.toBytes(entry.getKey()), Bytes.toBytes(entry.getValue())));
        }/*from  w w  w.  j  a v  a 2s. c  o  m*/
    }
    // Add this at the end
    rowModel.addCell(new CellModel(Bytes.toBytes(column), Bytes.toBytes(valueToCheck)));
    CellSetModel cellSetModel = new CellSetModel();
    cellSetModel.addRow(rowModel);
    Response response = client.put(url, Constants.MIMETYPE_PROTOBUF, cellSetModel.createProtobufOutput());
    Thread.yield();
    return response;
}