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:things.common.tools.FileTools.java

/**
 * Make a file.  If the file already exists, delete it.  
 * It will let any exception escape./*from  www  .  j a v  a2s.c om*/
 * @param name Path to the file
 * @return A file object
 * @throws Throwable
 */
public static File makeFile(String name) throws Throwable {

    File directory;
    String directoryPath;
    int fileSegment;

    // construct the path
    File target = new File(name);

    if (target.exists()) {
        int tries = ThingsConstants.FS_FILE_DELETE_RETRIES;
        boolean status = target.delete();
        while (status != true) {
            tries--;
            if (tries == 0)
                throw new ThingsException("Could not delete existing file where call wanted to makeFile().",
                        ThingsException.FILESYSTEM_ERROR_COULD_NOT_REPLACE,
                        ThingsNamespace.ATTR_PLATFORM_FILE_PATH);
            System.gc();
            Thread.yield();
            status = target.delete();
        }
    } else {
        fileSegment = name.lastIndexOf('/');
        if (fileSegment > 1) {
            directoryPath = name.substring(0, fileSegment);
            directory = new File(directoryPath);
            if (!directory.exists()) {
                directory.mkdirs();
            }
        }
    }
    return target;
}

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From source file:edu.upenn.cis.stormlite.LocalCluster.java

/**
 * Shut down the cluster//w ww  .  j a v  a  2  s . c  o  m
 * 
 * @param string
 */
public void killTopology(String string) {
    if (quit.getAndSet(true) == false) {
        while (!quit.get())
            Thread.yield();
    }

}

---

From source file:org.apache.tinkerpop.gremlin.groovy.engine.ScriptEnginesTest.java

@Test
public void shouldFailUntilImportExecutes() throws Exception {
    final ScriptEngines engines = new ScriptEngines(se -> {
    });/*from  www. j  a  va2  s.c om*/
    engines.reload("gremlin-groovy", Collections.<String>emptySet(), Collections.<String>emptySet(),
            Collections.emptyMap());

    final Set<String> imports = new HashSet<String>() {
        {
            add("import java.awt.Color");
        }
    };

    final AtomicInteger successes = new AtomicInteger(0);
    final AtomicInteger failures = new AtomicInteger(0);

    final Thread threadImport = new Thread(() -> {
        engines.addImports(imports);
    });

    // issue 1000 scripts in one thread using a class that isn't imported.  this will result in failure.
    // while that thread is running start a new thread that issues an addImports to include that class.
    // this should block further evals in the first thread until the import is complete at which point
    // evals in the first thread will resume and start to succeed
    final Thread threadEvalAndTriggerImport = new Thread(() -> IntStream.range(0, 1000).forEach(i -> {
        try {
            engines.eval("Color.BLACK", new SimpleBindings(), "gremlin-groovy");
            successes.incrementAndGet();
        } catch (Exception ex) {
            if (failures.incrementAndGet() == 500)
                threadImport.start();
            Thread.yield();
        }
    }));

    threadEvalAndTriggerImport.start();

    threadEvalAndTriggerImport.join();
    threadImport.join();

    assertTrue("Success: " + successes.intValue() + " - Failures: " + failures.intValue(),
            successes.intValue() > 0);
    assertTrue("Success: " + successes.intValue() + " - Failures: " + failures.intValue(),
            failures.intValue() >= 500);

    engines.close();
}

---

From source file:com.ruesga.rview.fragments.SnippetFragment.java

@Override
public void onDonePressed() {
    if (mNeedPermissions) {
        return;/*  www  .j a  v  a  2  s  .c om*/
    }
    readFileContent();
    Thread.yield();
    if (!mReadOnly && mContentSize > 0) {
        //noinspection ConstantConditions
        Uri snippetUri = getArguments().getParcelable(EXTRA_TEMP_SNIPPET_URI);
        if (snippetUri != null) {
            Activity a = getActivity();
            Fragment f = getParentFragment();
            if (f instanceof OnSnippetSavedListener) {
                ((OnSnippetSavedListener) f).onSnippetSaved(snippetUri, mMimeType, mContentSize);
            } else if (a instanceof OnSnippetSavedListener) {
                ((OnSnippetSavedListener) a).onSnippetSaved(snippetUri, mMimeType, mContentSize);
            }
        }
    }
}

---

From source file:ca.uviccscu.lp.server.main.ShutdownListener.java

@Override
public void windowClosing(WindowEvent e) {
    if (Shared.hashInProgress) {
        JOptionPane.showMessageDialog(null, "Closing not allowed - stop or finish hashing first!",
                "Hash in progress!", JOptionPane.WARNING_MESSAGE);
    } else {/*from w ww  . j a va  2  s .  c  o m*/
        SwingWorker worker = new SwingWorker<Void, Void>() {

            @Override
            public Void doInBackground() {
                try {
                    int ans1 = JOptionPane.showConfirmDialog(null,
                            "Are you sure you want to shutdown? "
                                    + "Clients will switch to passive mode until restarted.",
                            "Confirmation", JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);
                    if (ans1 == JOptionPane.OK_OPTION) {
                        l.debug("MainFrame window closing requested");
                        MainFrame.lockInterface();
                        MainFrame.setReportingActive();
                        MainFrame.updateTask("Shutting down", true);
                        MainFrame.updateProgressBar(0, 0, 0, "Shutting down settings manager!", true, true);
                        l.trace("Shutting down settings manager and saving session");
                        int ans2 = JOptionPane.showConfirmDialog(null, "Do you want to save the games list",
                                "Save confirmation", JOptionPane.OK_CANCEL_OPTION,
                                JOptionPane.QUESTION_MESSAGE);
                        if (ans2 == JOptionPane.OK_OPTION) {
                            SettingsManager.showSaveSettingsDialog();
                        }
                        SettingsManager.shutdown();
                        l.trace("OK");
                        l.trace("Stopping net manager");
                        MainFrame.updateProgressBar(0, 0, 0, "Shutting down net manager!", true, true);
                        ServerNetManager.shutdown();
                        l.trace("OK");
                        l.trace("Shutting down tracker manager - might have errors here!");
                        MainFrame.updateProgressBar(0, 0, 0, "Shutting down azureus - might take a while!",
                                true, true);
                        //Errors due to Azureus stupid shutdown thread killing routine(see AzureusCoreImpl)
                        //Basically it kills all other threads it doesnt recognise on JVM and then terminates
                        //Not designed to work with other application, and so it also kills the shutdown thread = BAD
                        //Library modified to prevent system shutdown, but exceptions still coming - irrelevant
                        TrackerManager.shutdown();
                        Thread.yield();
                        l.trace("OK");
                        Thread.yield();
                        Thread.sleep(5000);
                        while (!Shared.azShutdownDone) {
                            try {
                                l.trace("Awaiting az shutdown");
                                Thread.sleep(500);
                            } catch (InterruptedException ex) {
                                l.error("Az shutdown monitor interrupted", ex);
                            }
                        }
                        MainFrame.updateProgressBar(0, 0, 0, "Cleaning temporary files - might take a while!",
                                true, true);
                        File f = new File(Shared.workingDirectory);
                        /*
                        //delete until files unlocked or timeout
                        if (!deleteFolder(f, true, 3000, 15000)) {
                        l.trace("Advanced file deletion measures required");
                        releaseLocks();
                        deleteFolder(f, false, 0, 0);
                        //Advanced thread killing, stolen from azureus...except now it kills itself
                        l.error("Delete timeout  - attempting threadicide");
                        l.trace("Starting thread killing");
                        //First kill azureus SM - allows to do whatever we want with threads
                        l.trace("Removed SM");
                        System.setSecurityManager(null);
                        //
                        ThreadGroup tg = Thread.currentThread().getThreadGroup();
                        while (tg.getParent() != null) {
                        tg = tg.getParent();
                        }
                        Thread[] threads = new Thread[tg.activeCount() + 1024];
                        tg.enumerate(threads, true);
                        //VERY BAD WAY TO STOP THREAD BUT NO CHOICE - need to release the file locks
                        for (int i = 0; i < threads.length; i++) {
                        Thread th = threads[i];
                        if (th != null && th != Thread.currentThread() && AEThread2.isOurThread(th)) {
                        l.trace("Stopping " + th.getName());
                        try {
                        th.stop();
                        l.trace("ok");
                        } catch (SecurityException e) {
                        l.trace("Stop vetoed by SM", e);
                        }
                                
                        }
                        }
                        //
                        deleteFolder(f, false, 0, 0);
                        l.error("Trying to stop more threads, list:");
                        //List remaining threads
                        ThreadGroup tg2 = Thread.currentThread().getThreadGroup();
                        while (tg2.getParent() != null) {
                        tg2 = tg2.getParent();
                        }
                        //Object o = new Object();
                        //o.notifyAll();
                        Thread[] threads2 = new Thread[tg2.activeCount() + 1024];
                        tg2.enumerate(threads2, true);
                        //VERY BAD WAY TO STOP THREAD BUT NO CHOICE - need to release the file locks
                        for (int i = 0; i < threads2.length; i++) {
                        Thread th = threads2[i];
                        if (th != null) {
                        l.trace("Have thread: " + th.getName());
                        if (th != null && th != Thread.currentThread() && (AEThread2.isOurThread(th) || isAzThread(th))) {
                        l.trace("Stopping " + th.getName());
                        try {
                        th.stop();
                        l.trace("ok");
                        } catch (SecurityException e) {
                        l.trace("Stop vetoed by SM", e);
                        }
                                
                        }
                        }
                        }
                        try {
                        Utils.cleanupDir();
                        l.trace("OK");
                        } catch (IOException e) {
                        l.trace("Cleaning failed after more thread cleanup", e);
                        Thread.yield();
                        }
                        threadCleanup(f);
                        l.error("Last resort - scheduling delete on JVM exit - might FAIL, CHECK MANUALLY");
                        try {
                        FileUtils.forceDeleteOnExit(f);
                        } catch (IOException iOException) {
                        l.fatal("All delete attempts failed - clean manually");
                        }
                        }
                        File test = new File("C:\\AZTest\\AZ\\logs\\debug_1.log");
                        test.deleteOnExit();
                        try {
                        Thread.sleep(30000);
                        } catch (InterruptedException ex) {
                        java.util.logging.Logger.getLogger(ShutdownListener.class.getName()).log(Level.SEVERE, null, ex);
                        }
                         *
                         */
                        threadReadout();
                        try {
                            Utils.cleanupDir();
                            l.trace("OK");
                        } catch (IOException e) {
                            l.trace("Cleaning failed - expected due to stupid Azureus file lock", e);
                            Thread.yield();
                        }
                        System.exit(0);
                        return null;
                    } else {
                        return null;
                    }
                } catch (Exception ex) {
                    l.fatal("Exception during shutdown!!!", ex);
                    //just end it
                    System.exit(4);
                    return null;
                }
            }
        };
        worker.execute();
    }
}

---

From source file:org.apache.zeppelin.notebook.NotebookTest.java

@Test
public void testRunAll() throws IOException {
    Note note = notebook.createNote();//from  w w w  . j  a v  a  2 s. co  m
    note.getNoteReplLoader().setInterpreters(factory.getDefaultInterpreterSettingList());

    Paragraph p1 = note.addParagraph();
    p1.setText("p1");
    Paragraph p2 = note.addParagraph();
    p2.setText("p2");
    assertEquals(null, p2.getResult());
    note.runAll();

    while (p2.isTerminated() == false || p2.getResult() == null)
        Thread.yield();
    assertEquals("repl1: p2", p2.getResult().message());
}

---

From source file:Main.java

/**
 * Compute the integral root of x to a given scale, x >= 0.
 * Use Newton's algorithm.//from   ww  w  . j a v  a  2s. c  o  m
 * @param x the value of x
 * @param index the integral root value
 * @param scale the desired scale of the result
 * @return the result value
 */
public static BigDecimal intRoot(BigDecimal x, long index, int scale) {
    // Check that x >= 0.
    if (x.signum() < 0) {
        throw new IllegalArgumentException("x < 0");
    }

    int sp1 = scale + 1;
    BigDecimal n = x;
    BigDecimal i = BigDecimal.valueOf(index);
    BigDecimal im1 = BigDecimal.valueOf(index - 1);
    BigDecimal tolerance = BigDecimal.valueOf(5).movePointLeft(sp1);
    BigDecimal xPrev;

    // The initial approximation is x/index.
    x = x.divide(i, scale, BigDecimal.ROUND_HALF_EVEN);

    // Loop until the approximations converge
    // (two successive approximations are equal after rounding).
    do {
        // x^(index-1)
        BigDecimal xToIm1 = intPower(x, index - 1, sp1);

        // x^index
        BigDecimal xToI = x.multiply(xToIm1).setScale(sp1, BigDecimal.ROUND_HALF_EVEN);

        // n + (index-1)*(x^index)
        BigDecimal numerator = n.add(im1.multiply(xToI)).setScale(sp1, BigDecimal.ROUND_HALF_EVEN);

        // (index*(x^(index-1))
        BigDecimal denominator = i.multiply(xToIm1).setScale(sp1, BigDecimal.ROUND_HALF_EVEN);

        // x = (n + (index-1)*(x^index)) / (index*(x^(index-1)))
        xPrev = x;
        x = numerator.divide(denominator, sp1, BigDecimal.ROUND_DOWN);

        Thread.yield();
    } while (x.subtract(xPrev).abs().compareTo(tolerance) > 0);

    return x;
}

---

From source file:org.apache.zeppelin.helium.HeliumApplicationFactoryTest.java

@Test
public void testUnloadOnParagraphRemove() throws IOException {
    // given/*from ww w .j  a  va 2 s  .c o m*/
    HeliumPackage pkg1 = new HeliumPackage(HeliumType.APPLICATION, "name1", "desc1", "",
            HeliumTestApplication.class.getName(), new String[][] {}, "", "");

    Note note1 = notebook.createNote(anonymous);
    interpreterSettingManager.setInterpreters("user", note1.getId(),
            interpreterSettingManager.getDefaultInterpreterSettingList());

    Paragraph p1 = note1.addParagraph(AuthenticationInfo.ANONYMOUS);

    // make sure interpreter process running
    p1.setText("%mock1 job");
    p1.setAuthenticationInfo(anonymous);
    note1.run(p1.getId());
    while (p1.isTerminated() == false || p1.getResult() == null)
        Thread.yield();

    assertEquals(0, p1.getAllApplicationStates().size());
    String appId = heliumAppFactory.loadAndRun(pkg1, p1);
    ApplicationState app = p1.getApplicationState(appId);
    while (app.getStatus() != ApplicationState.Status.LOADED) {
        Thread.yield();
    }

    // when remove paragraph
    note1.removeParagraph("user", p1.getId());

    // then
    assertEquals(ApplicationState.Status.UNLOADED, app.getStatus());

    // clean
    notebook.removeNote(note1.getId(), anonymous);
}

---

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

public PondLife get(int timeoutMs) throws Exception {
    PondLife pl = null;// w w  w  . j a va2 s. co m

    // Defer to other threads before locking 
    if (_available < _min)
        Thread.yield();

    int new_id = -1;

    // Try to get pondlife without creating new one.
    synchronized (this) {
        // Wait if none available.
        if (_running > 0 && _available == 0 && _size == _pondLife.length && timeoutMs > 0)
            wait(timeoutMs);

        // If still running
        if (_running > 0) {
            // if pondlife available
            if (_available > 0) {
                int id = _index[--_available];
                pl = _pondLife[id];
            } else if (_size < _pondLife.length) {
                // Reserve spot for a new one
                new_id = reservePondLife(false);
            }
        }

        // create reserved pondlife
        if (pl == null && new_id >= 0)
            pl = newPondLife(new_id);
    }

    return pl;
}

---

From source file:com.teletalk.jserver.util.SpillOverByteArrayOutputStream.java

/**
 * Reset the stream, cleans up resources and deletes any spill over file that has been created.
 */// w w  w.  j  a v a2 s . c  om
public void reset() {
    this.byteArrayOutputStream = null;
    this.bytesWritten = 0;
    this.spillOverFailed = false;
    if (this.spillOverFileOutputStream != null) {
        try {
            this.spillOverFileOutputStream.close();
        } catch (Exception e) {
        }
        Thread.yield();
    }
    this.spillOverFileOutputStream = null;
    if (this.spillOverFile != null) {
        if (this.spillOverFile.delete())
            this.spillOverFile = null;
    }
}

---

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