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:Main.java

/**
 * Compute e^x to a given scale. Break x into its whole and fraction parts
 * and compute (e^(1 + fraction/whole))^whole using Taylor's formula.
 * // w  w  w. j  a va  2  s .  c o m
 * @param x
 *            the value of x
 * @param scale
 *            the desired scale of the result
 * @return the result value
 */
public static BigDecimal exp(BigDecimal x, int scale) {
    // e^0 = 1
    if (x.signum() == 0) {
        return BigDecimal.valueOf(1);
    }

    // If x is negative, return 1/(e^-x).
    else if (x.signum() == -1) {
        return BigDecimal.valueOf(1).divide(exp(x.negate(), scale), scale, BigDecimal.ROUND_HALF_EVEN);
    }

    // Compute the whole part of x.
    BigDecimal xWhole = x.setScale(0, BigDecimal.ROUND_DOWN);

    // If there isn't a whole part, compute and return e^x.
    if (xWhole.signum() == 0) {
        return expTaylor(x, scale);
    }

    // Compute the fraction part of x.
    BigDecimal xFraction = x.subtract(xWhole);

    // z = 1 + fraction/whole
    BigDecimal z = BigDecimal.valueOf(1).add(xFraction.divide(xWhole, scale, BigDecimal.ROUND_HALF_EVEN));

    // t = e^z
    BigDecimal t = expTaylor(z, scale);

    BigDecimal maxLong = BigDecimal.valueOf(Long.MAX_VALUE);
    BigDecimal result = BigDecimal.valueOf(1);

    // Compute and return t^whole using intPower().
    // If whole > Long.MAX_VALUE, then first compute products
    // of e^Long.MAX_VALUE.
    while (xWhole.compareTo(maxLong) >= 0) {
        result = result.multiply(intPower(t, Long.MAX_VALUE, scale)).setScale(scale,
                BigDecimal.ROUND_HALF_EVEN);
        xWhole = xWhole.subtract(maxLong);

        Thread.yield();
    }
    return result.multiply(intPower(t, xWhole.longValue(), scale)).setScale(scale, BigDecimal.ROUND_HALF_EVEN);
}

---

From source file:fi.jumi.core.stdout.SynchronizedPrintStreamTest.java

/**
 * For example {@link Throwable#printStackTrace} does this, we must be careful to always acquire a lock on the
 * monitor of the PrintStream first, before all other locks.
 *//*from ww  w  .  j ava2 s.co m*/
@Test
public void does_not_deadlock_if_somebody_locks_in_the_PrintStream_externally() throws Exception {
    final int ITERATIONS = 10;
    PrintStream printStream = SynchronizedPrintStream.create(new NullOutputStream(), Charset.defaultCharset(),
            lock);

    // will fail with a test timeout if a deadlock happens
    runConcurrently(() -> {
        // what Thread.printStackTrace() would do
        synchronized (printStream) {
            for (int i = 0; i < ITERATIONS; i++) {
                Thread.yield();
                printStream.print("X");
            }
        }
    }, () -> {
        // what a normal printer would do
        for (int i = 0; i < ITERATIONS; i++) {
            Thread.yield();
            printStream.print("X");
        }
    });
}

---

From source file:com.thoughtworks.go.helpers.FileSystemUtils.java

public static File createFile(String filename, File directory) throws IOException {
    final File file = new File(directory, filename);

    // attempt workaround for intermitent w2k error:
    // java.io.IOException: Access is denied
    // at java.io.WinNTFileSystem.createFileExclusively(Native Method)
    // at java.io.File.createNewFile(File.java:883)
    // at net.sourceforge.cruisecontrol.dashboard.testhelpers.FilesystemUtils.createFile(FilesystemUtils.java:94)
    // ...//  w  w w. j  av  a  2s  .c o m
    // see: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6198547
    // see: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6325169
    int count = 0;
    IOException lastIOException = null;
    do {
        try {
            file.createNewFile();
        } catch (IOException e) {
            lastIOException = e;
            Thread.yield();
        }
        count++;
    } while (!file.exists() && count < 3);

    // another attempt to workaround the above bugs, using approach similar to that of Ant MkDirs taskdef
    // see Util.doMkDirs()
    if (!file.exists()) {
        try {
            Thread.sleep(10);
            try {
                file.createNewFile();
            } catch (IOException e) {
                lastIOException = e;
            }
        } catch (InterruptedException ex) {
            try {
                file.createNewFile();
            } catch (IOException e) {
                lastIOException = e;
            }
        }
    }

    if (!file.exists()) {
        if (lastIOException != null) {
            throw new RuntimeException("Error creating file: " + file.getAbsolutePath(), lastIOException);
        } else {
            throw new RuntimeException("Error creating file: " + file.getAbsolutePath());
        }
    }

    file.deleteOnExit();
    return file;
}

---

From source file:org.apache.synapse.transport.vfs.VFSEchoRawXMLTest.java

public void testXMLFileInDirectory() throws Exception {

    Options options = new Options();
    options.setTo(new EndpointReference(
            "vfs:file:" + new File(".").getAbsolutePath() + File.separator + "target/vfs1/req/request.xml"));
    options.setAction(Constants.AXIS2_NAMESPACE_URI + "/echoOMElementNoResponse");

    ServiceClient sender = new ServiceClient(getClientCfgCtx(), null);
    sender.setOptions(options);/*w w w. j ava 2s .  co  m*/
    sender.fireAndForget(createPayload());

    Thread.yield();
    Thread.sleep(1000 * 5);

    File req = new File("./target/vfs1/req/request.xml");
    if (req.exists()) {
        fail("Request file still exists. Not processed by service? : " + req.getPath());
    }

    File res = new File("target/vfs1/res/response.xml");
    if (!res.exists()) {
        fail("Response file not created : " + res.getPath());
    }
}

---

From source file:de.mklinger.commons.exec.PipeRunnable.java

public void waitForStart(final long timeoutMillis) throws CommandLineException {
    final long start = System.currentTimeMillis();
    while (!started.get()) {
        if (start + timeoutMillis < System.currentTimeMillis()) {
            throw new CommandLineException("Timout waiting for pipe to start after " + timeoutMillis + " ms");
        }//from  w w w.  j  a  v  a 2  s . c o m
        Thread.yield();
    }
}

---

From source file:de.hybris.platform.impex.jalo.PLA_12772_Test.java

private void doTest() throws ImpExException {
    final ThreadPool pool = createWorkerThreadPool(); // use pool of our own to avoid race conditions with cronjob and others
    try {//from  w  w  w . ja  v  a  2  s. com
        final int max = pool.getMaxActive();

        // start first job using almost all workers ( max - 2 ( reader + result proc ) - 3 ( rest for next run ) )
        final MultiThreadedImporter importer1 = createImporter(max - 5, createTestCSV(1000, 0), pool);
        Item last1;
        last1 = importer1.importNext(); // this starts importing

        Thread.yield();
        assertTrue(pool.getNumActive() > 0);

        // start next job trying to get more workers than possible
        final MultiThreadedImporter importer2 = createImporter(10, createTestCSV(1000, 1000), pool);
        Item last2;
        last2 = importer2.importNext(); // this starts importing as well

        // now try to consume both 

        do {
            if (last1 != null) {
                last1 = importer1.importNext();
            }
            if (last2 != null) {
                last2 = importer2.importNext();
            }
        } while (last1 != null || last2 != null);

        assertEquals("still got used workers", 0, waitForWorkerToReturnToPoolAndGetUsedNow(pool, 30));
    } finally {
        pool.close();
    }
}

---

From source file:com.quinsoft.zeidon.utils.TimedLruCache.java

public TimedLruCache(long timeToLiveInSeconds, final long timerIntervalInSeconds, int maxItems) {
    this.timeToLiveInMillis = timeToLiveInSeconds * 1000;

    cacheMap = new LRUMap(maxItems);

    if (timeToLiveInMillis > 0 && timerIntervalInSeconds > 0) {

        Thread t = new Thread(new Runnable() {
            @Override//  ww  w.j  a v a2  s  . c o  m
            public void run() {
                while (true) {
                    try {
                        Thread.sleep(timerIntervalInSeconds * 1000);
                    } catch (InterruptedException ex) {
                    }

                    cleanup();
                    Thread.yield();
                }
            }
        });

        t.setDaemon(true);
        t.start();
    }
}

---

From source file:test.com.azaptree.services.spring.application.SpringApplicationServiceTest.java

@Test
public void testSpringApplicationService() throws Exception {
    final String[] args = { "classpath:spring-application-service.xml" };

    try {//from   w w w. j a  v a  2  s. co m
        new Thread(new Runnable() {

            @Override
            public void run() {
                try {
                    SpringApplicationService.main(args);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();

        Thread.yield();

        ApplicationContext ctx = SpringApplicationService.getApplicationContext();
        while (ctx == null) {
            log.info("Waiting for ApplicationContext to initialize ...");
            Thread.sleep(100l);
            ctx = SpringApplicationService.getApplicationContext();
        }
        Assert.assertNotNull(ctx);
        final Properties props = ctx.getBean("systemProps", Properties.class);
        Assert.assertNotNull(props);
        Assert.assertFalse(CollectionUtils.isEmpty(props));

        Assert.assertEquals(props.getProperty("app.env"), "DEV");

        final Map<String, String> env = ctx.getBean("env", Map.class);
        Assert.assertNotNull(env);
        Assert.assertFalse(CollectionUtils.isEmpty(env));

        final Map<String, String> environment = ctx.getBean("environment", Map.class);
        Assert.assertNotNull(environment);
        Assert.assertFalse(CollectionUtils.isEmpty(environment));

        log.info("bean count: {}", ctx.getBeanDefinitionCount());
        for (String beanName : ctx.getBeanDefinitionNames()) {
            log.info("beanName: {}", beanName);
        }
    } finally {
        SpringApplicationService.shutdown();
    }
}

---

From source file:org.ros.android.acm_serial.PollingInputStream.java

/**
 * @param inputStream/*from ww  w  .j  a v a 2s.  c  o  m*/
 *          the {@link InputStream} to read from
 * @param executorService
 *          used to execute the read loop
 */
public PollingInputStream(final InputStream inputStream, ExecutorService executorService) {
    readBuffer = new byte[BUFFER_CAPACITY];
    readPosition = 0;
    writePosition = 0;
    executorService.execute(new CancellableLoop() {
        @Override
        protected void loop() throws InterruptedException {
            try {
                while (remaining() < READ_SIZE) {
                    if (readPosition < remaining()) {
                        // There isn't enough room to compact the buffer yet. We will most
                        // likely start dropping messages.
                        log.error("Not enough room to compact buffer.");
                        Thread.yield();
                        continue;
                    }
                    synchronized (readBuffer) {
                        int remaining = remaining();
                        System.arraycopy(readBuffer, writePosition, readBuffer, 0, remaining);
                        writePosition = remaining;
                        readPosition = 0;
                        if (DEBUG) {
                            log.info(String.format("Buffer compacted. %d bytes remaining.", remaining()));
                        }
                    }
                }
                int bytesRead = inputStream.read(readBuffer, writePosition, READ_SIZE);
                if (bytesRead < 0) {
                    throw new IOException("Stream closed.");
                }
                writePosition += bytesRead;
            } catch (IOException e) {
                throw new RosRuntimeException(e);
            }
        }
    });
}

---

From source file:MainClass.java

public void run() {
    byte[] buffer = new byte[65507];
    while (true) {
        if (stopped)
            return;
        DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
        try {/*from  ww  w  .j a  v  a 2s .  co  m*/
            socket.receive(dp);
            String s = new String(dp.getData(), 0, dp.getLength());
            System.out.println(s);
            Thread.yield();
        } catch (IOException ex) {
            System.err.println(ex);
        }
    }
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• »