Example usage for java.lang Thread yield

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:com.amazonaws.metrics.internal.cloudwatch.MetricUploaderThread.java

@Override
public void run() {
    while (!cancelled) {
        try {//w w w.j  av a 2 s. c om
            Iterable<PutMetricDataRequest> requests = qIterator.nextUploadUnits();
            for (PutMetricDataRequest req : requests) {
                log.debug(req);
                cloudwatchClient.putMetricData(req);
                Thread.yield();
            }
        } catch (InterruptedException e) {
            if (!cancelled) {
                log.debug("Unexpected interruption ignored");
            }
        } catch (Throwable t) {
            log.warn("Unexpected condition; soldier on", t);
            Thread.yield();
        }
    }
}

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From source file:org.apache.streams.rss.provider.RssLinkProvider.java

@Override
public StreamsResultSet readCurrent() {
    Queue<StreamsDatum> result = Queues.newConcurrentLinkedQueue();
    synchronized (this.entries) {
        if (this.entries.isEmpty() && this.doneProviding.get()) {
            this.keepRunning.set(false);
        }//from   www.ja v a  2  s.  co  m

        while (!this.entries.isEmpty()) {
            ObjectNode node = this.entries.poll();

            try {
                while (!result.offer(new StreamsDatum(node.get("uri").asText()))) {
                    Thread.yield();
                }
            } catch (Exception e) {
                LOGGER.error("Problem offering up new StreamsDatum: {}", node.asText());
            }
        }
    }
    LOGGER.debug("** ReadCurrent return {} streams datums", result.size());

    return new StreamsResultSet(result);
}

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From source file:org.apache.jackrabbit.oak.plugins.document.persistentCache.CacheTest.java

@Test
public void recoverIfCorrupt() throws Exception {
    FileUtils.deleteDirectory(new File("target/cacheTest"));
    new File("target/cacheTest").mkdirs();
    FileOutputStream out = new FileOutputStream("target/cacheTest/cache-0.data");
    out.write("corrupt".getBytes());
    out.close();//from  w  w w. ja  v  a  2 s  .  co m
    PersistentCache pCache = new PersistentCache("target/cacheTest");
    CacheLIRS<PathRev, StringValue> cache = new CacheLIRS.Builder<PathRev, StringValue>().maximumSize(1)
            .build();
    Cache<PathRev, StringValue> map = pCache.wrap(null, null, cache, CacheType.DIFF);
    String largeString = new String(new char[1024 * 1024]);
    for (int counter = 0; counter < 10; counter++) {
        long end = System.currentTimeMillis() + 100;
        while (System.currentTimeMillis() < end) {
            Thread.yield();
        }
        for (int i = 0; i < 100; i++) {
            PathRev k = new PathRev("/" + counter, new RevisionVector(new Revision(0, 0, i)));
            map.getIfPresent(k);
            map.put(k, new StringValue(largeString));
        }
    }
    assertTrue("Exceptions: " + pCache.getExceptionCount(), pCache.getExceptionCount() < 100);
}

---

From source file:Main.java

/**
 * Compute e^x to a given scale by the Taylor series.
 * @param x the value of x/*  w  w  w.  j ava  2 s.  c om*/
 * @param scale the desired scale of the result
 * @return the result value
 */
private static BigDecimal expTaylor(BigDecimal x, int scale) {
    BigDecimal factorial = BigDecimal.valueOf(1);
    BigDecimal xPower = x;
    BigDecimal sumPrev;

    // 1 + x
    BigDecimal sum = x.add(BigDecimal.valueOf(1));

    // Loop until the sums converge
    // (two successive sums are equal after rounding).
    int i = 2;
    do {
        // x^i
        xPower = xPower.multiply(x).setScale(scale, BigDecimal.ROUND_HALF_EVEN);

        // i!
        factorial = factorial.multiply(BigDecimal.valueOf(i));

        // x^i/i!
        BigDecimal term = xPower.divide(factorial, scale, BigDecimal.ROUND_HALF_EVEN);

        // sum = sum + x^i/i!
        sumPrev = sum;
        sum = sum.add(term);

        ++i;
        Thread.yield();
    } while (sum.compareTo(sumPrev) != 0);

    return sum;
}

---

From source file:net.jradius.server.Processor.java

public void run() {
    while (getActive()) {
        try {// w ww.j a  va2  s  .  c  om
            Thread.yield();
            process();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (Throwable e) {
            e.printStackTrace();
            log.error("Error in radius task Processor", e);
        }
    }
}

---

From source file:com.espertech.esper.core.service.InsertIntoLatchSpin.java

/**
 * Blocking call that returns only when the earlier latch completed.
 * @return payload of the latch/*from www  . jav  a 2 s .co m*/
 */
public EventBean await() {
    if (!earlier.isCompleted) {
        long spinStartTime = factory.getTimeSourceService().getTimeMillis();

        while (!earlier.isCompleted) {
            Thread.yield();

            long spinDelta = factory.getTimeSourceService().getTimeMillis() - spinStartTime;
            if (spinDelta > msecTimeout) {
                log.info("Spin wait timeout exceeded in insert-into dispatch at " + msecTimeout + "ms for "
                        + factory.getName()
                        + ", consider disabling insert-into between-statement latching for better performance");
                break;
            }
        }
    }

    return payload;
}

---

From source file:elsu.support.XMLViewer.java

/**
 * showConfigNodes(...) method is used to recursively scan the XML config
 * file and display the nodes in tree format.
 *
 * @param parent/*w w  w. j a va 2s  .c  om*/
 * @param level level of the node, increased for each child-node to allow
 * tabbed tree display output
 *
 */
protected void showConfig(org.w3c.dom.Node parent, int level) {
    // create a local class to display node value/text and associated
    // node attributes
    class SubShowNode {

        // loop through the node attributes for the node passed
        String displayNodeAttributes(org.w3c.dom.Node node) {
            // if node is null, return empty string
            if (node == null) {
                return "";
            }

            // create string build object to support string concatanation
            StringBuilder sb = new StringBuilder();

            // retrieve node attributes (if any)
            ArrayList<Node> nAttributes = _xmlr.getNodeAttributes(node);

            // loop through the attributes array and append them to the
            // string builder object
            if (nAttributes != null) {
                for (Object na : nAttributes) {
                    // append the attribute details (key/text) to the string
                    // builder object
                    if (na != null) {
                        sb.append(" [ATTR=").append(((org.w3c.dom.Node) na).getNodeName()).append("//")
                                .append(((org.w3c.dom.Node) na).getNodeValue()).append("]");
                    }

                    // yield processing to other threads
                    Thread.yield();
                }
            }

            // return the string builder representation as a string
            return sb.toString();
        }
    }

    // declare the showNode class to allow methods to reference the display
    // method to prevent duplicaion in code
    SubShowNode showNode = new SubShowNode();

    // retrieve the child nodes for processing
    ArrayList<Node> nodes = _xmlr.getNodeChildren(parent);

    // if node level is 1, then this is root node, display it with no
    // indentation
    if (level == 1) {
        // display the parent node name
        String data = org.apache.commons.lang3.StringUtils.repeat('~', level) + parent.getNodeName();

        // use the sub function to extract node attributes
        data += showNode.displayNodeAttributes(parent);

        // display all collected data to the user output
        System.out.println(data);
    }

    // parse the list of child nodes for the node being processed
    if (nodes != null) {
        for (Object node : nodes) {
            // display the parent node name
            String data = org.apache.commons.lang3.StringUtils.repeat('\t', level)
                    + ((org.w3c.dom.Node) node).getNodeName();

            // use the sub function to extract node attributes
            data += showNode.displayNodeAttributes((org.w3c.dom.Node) node);

            // if node has a text value, display the text
            if (_xmlr.getNodeText((org.w3c.dom.Node) node) != null) {
                data += " (TEXT=" + _xmlr.getNodeText((org.w3c.dom.Node) node) + ")";
            }

            // display all collected data to the user output
            System.out.println(data);

            // recall the function (recursion) to see if the node has child 
            // nodes and preocess them in hierarchial level
            showConfig((org.w3c.dom.Node) node, (level + 1));

            // yield processing to other threads
            Thread.yield();
        }
    }
}

---

From source file:com.dataartisans.queryablestatedemo.BumpEventGeneratorSource.java

@Override
public void run(SourceContext<BumpEvent> sourceContext) throws Exception {
    final Random rand = new Random();
    final AtomicLong count = new AtomicLong();

    Thread throughputLogger = null;
    if (printThroughput) {
        throughputLogger = new Thread(new ThroughputLogger(count), "ThroughputLogger");
        throughputLogger.start();/*from w  ww.  j a v  a 2  s .  co  m*/
    }

    try {
        while (running) {
            // Generate random events
            final int userId = rand.nextInt(Integer.MAX_VALUE);

            final String itemCase = RandomStringUtils.randomAlphanumeric(ITEM_ID_NUM_CHARS).toLowerCase();

            synchronized (sourceContext.getCheckpointLock()) {
                sourceContext.collect(new BumpEvent(userId, itemCase));
            }

            // Increment count for throughput logger
            count.incrementAndGet();

            Thread.yield();
        }
    } finally {
        if (throughputLogger != null) {
            throughputLogger.interrupt();
            throughputLogger.join();
        }
    }
}

---

From source file:org.mwc.cmap.media.views.images.ImageLoader.java

public void load(ImagePanel panel) {
    synchronized (loaderMutex) {
        boolean load = false;
        if (panel.shouldLoadCurrentImage()) {
            load = true;// ww w  .  j  ava  2s .c om
            labelsToLoad.add(new ImagePanelLoader(panel.getCurrentImageFile(), panel));
            panel.currentImagePassedToLoad();
        }
        if (panel.shouldLoadNextImage()) {
            load = true;
            labelsToLoad.add(new ImagePanelLoader(panel.getNextImageFile(), panel));
            panel.nextImagePassedToLoad();
        }
        if (load) {
            loaderMutex.notify();
            Thread.yield();
        }
    }
}

---

From source file:com.espertech.esper.core.InsertIntoLatchSpin.java

/**
 * Blocking call that returns only when the earlier latch completed.
 * @return payload of the latch/*from  w w w.  jav  a  2s.  c  om*/
 */
public EventBean await() {
    if (!earlier.isCompleted) {
        long spinStartTime = timeSourceService.getTimeMillis();

        while (!earlier.isCompleted) {
            Thread.yield();

            long spinDelta = timeSourceService.getTimeMillis() - spinStartTime;
            if (spinDelta > msecTimeout) {
                log.info("Spin wait timeout exceeded in insert-into dispatch at " + msecTimeout
                        + "ms, consider disabling insert-into between-statement latching for better performance");
                break;
            }
        }
    }

    return payload;
}

---

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