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:uk.co.real_logic.aeron.tools.ThwackerTool.java

/**
 * Worker Thread Method:/*ww  w.jav a 2 s  .c  o  m*/
 * Randomly selects a publication, checks if it is active, then attempts to send on that publication
 */

public void sendOnRandomPub() {
    final Random rand = SeedableThreadLocalRandom.current();
    int i;
    ThwackingElement pub;
    final long threadId = Thread.currentThread().getId();

    LOG.fine("Sending thread " + threadId + " started!");
    while (running) {
        //Get random publication slot
        i = rand.nextInt(numberOfPublications);
        pub = pubs[i];
        pub.trySendMessage(threadId);
        /* Every iteration sends on the control Publication */
        ctrlPub.trySendMessage(threadId);

        Thread.yield();
    }
    allDone.countDown();
    LOG.fine("Sending thread " + threadId + " all done!");
}

---

From source file:org.apache.hadoop.hbase.stargate.TestRowResource.java

void doTestMultiCellGetPutPB() throws IOException {
    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   www .j a  va2s.  com
    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);
    Response response = client.put(path, MIMETYPE_PROTOBUF, cellSetModel.createProtobufOutput());
    Thread.yield();

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

    // check that all of the values were created
    checkValuePB(TABLE, ROW_1, COLUMN_1, VALUE_1);
    checkValuePB(TABLE, ROW_1, COLUMN_2, VALUE_2);
    checkValuePB(TABLE, ROW_2, COLUMN_1, VALUE_3);
    checkValuePB(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:edu.utah.further.i2b2.hook.further.FurtherInterceptionFilter.java

/**
 * Send the i2b2 query request message to the FURTHeR FQE. Must be run after the i2b2
 * processing chain, because it depends on the i2b2 query ID generated by the i2b2
 * server.//from   w  w  w .  ja va2 s  .  c  o m
 * 
 * @param request
 * @param i2b2QueryId
 *            i2b2 query ID, obtained from the i2b2 response
 */
private void spawnFurtherRequest(final HttpServletRequest request, final long i2b2QueryId) {
    if (log.isDebugEnabled()) {
        log.debug("Read i2b2QueryId from request: " + i2b2QueryId);
    }
    try {
        // Need to read create from request.getInputStream() multiple times
        // in this method ==> save a copy in a buffer first
        // inputStream is already at the end of the file.
        final InputStream inputStream = request.getInputStream();
        final byte[] buffer = CoreUtil.readBytesFromStream(inputStream);
        inputStream.close();

        // Decide whether to fork or not
        if (StringUtil.isValidLong(i2b2QueryId) && isProcessRequest(buffer)) {
            // Read the FURTHeR section of the i2b2 request body
            final String requestXml = new String(buffer);
            // Request contains an FQE processing flag, send to FURTHeR
            if (log.isDebugEnabled()) {
                ServletUtil.printRequestHeaders(request);
                ServletUtil.printRequestParameters(request);
                ServletUtil.printRequestAttributes(request);
            }

            // TODO: read query instance id from i2b2 response and pass to the
            // following call
            final QueryContextIdentifier id = furtherServices.i2b2QueryRequest(requestXml, i2b2QueryId);

            // Make available to response through the request, ensures thread safety
            // instead of using instance var
            request.setAttribute(QUERY_ID, id);

            QueryState state = furtherServices.getQueryState(id).getState();

            final StopWatch stopWatch = new StopWatch();

            final int interval = 10;
            int i = 0;
            stopWatch.start();
            // Poll state every sec
            final long maxQueryTimeMillis = furtherServices.getMaxQueryTime() * 1000;
            while (state != QueryState.COMPLETED && state != QueryState.STOPPED && state != QueryState.FAILED
                    && state != QueryState.INVALID && state != null
                    && stopWatch.getTime() < maxQueryTimeMillis) {
                Thread.yield();
                state = furtherServices.getQueryState(id).getState();

                if (log.isDebugEnabled() && ((i % interval) == 0)) {
                    log.debug("QueryState for query " + id.getId() + ": " + state);
                }

                i++;
            }
            stopWatch.stop();
        } else {
            if (log.isDebugEnabled()) {
                log.info("Ignoring unrecognized/irrelvant requestXml");
            }
        }
    } catch (final Throwable throwable) {
        if (log.isDebugEnabled()) {
            log.error("Caught " + throwable + ", ignoring", throwable);
        }
    }
}

---

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

/**
 * Worker Thread Method://w w  w  .  j  a v a  2s. co m
 * Randomly selects a slot out of the subscription array and creates a subscription
 * if there isn't on there already
 */
public void createSubs() {
    final Random rand = SeedableThreadLocalRandom.current();
    int i;
    ThwackingElement sub;
    while (running) {
        if (active) {
            i = rand.nextInt(numberOfSubscriptions);
            sub = subs[i];
            sub.tryAddSub();
        }
        Thread.yield();
    }
    allDone.countDown();
    LOG.fine("CreateSubs all done!");
}

---

From source file:org.mule.providers.ldap.MuleEmbeddedTestCase.java

public void testDispatchReceiveAddStress() throws Exception {
    final MuleClient client = new MuleClient();

    final int count = 10000;

    Runnable rec = new Runnable() {

        public void run() {

            int current = 0;

            try {

                while (current < count) {
                    UMOMessage result = client.receive("ldap://ldap.in", 15000);

                    assertNotNull(result);
                    assertTrue(result.getPayload() instanceof LDAPResponse);
                    assertEquals(((LDAPResponse) result.getPayload()).getResultCode(), LDAPException.SUCCESS);
                    assertEquals(((LDAPResponse) result.getPayload()).getType(), LDAPMessage.ADD_RESPONSE);
                    logger.debug("got " + current);
                    current++;//from www .j a  v a2s .c om
                }

            } catch (UMOException e) {
                fail(e.toString());

            }

            assertTrue(current == count);

        }

    };

    Thread t = new Thread(rec);
    t.start();

    Thread.yield();

    // we send a message on the endpoint we created, i.e. vm://Single
    for (int i = 0; i < count; i++)
        client.dispatch("ldap://ldap.out", TestHelper.getRandomEntryAddRequest(), null);

    t.join();

}

---

From source file:com.adito.core.LineInput.java

private void fill() throws IOException {
    // if the mark is in the middle of the buffer
    if (_mark > 0) {
        // moved saved bytes to start of buffer
        int saved = _contents - _mark;
        System.arraycopy(_buf, _mark, _buf, 0, saved);
        _pos -= _mark;/*  w w w.j  a v  a2 s  .c o  m*/
        _avail -= _mark;
        _contents = saved;
        _mark = 0;
    } else if (_mark < 0 && _pos > 0) {
        // move remaining bytes to start of buffer
        int saved = _contents - _pos;
        System.arraycopy(_buf, _pos, _buf, 0, saved);
        _avail -= _pos;
        _contents = saved;
        _pos = 0;
    } else if (_mark == 0 && _pos > 0 && _contents == _buf.length) {
        // Discard the mark as we need the space.
        _mark = -1;
        fill();
        return;
    }

    // Get ready to top up the buffer
    int n = 0;
    _eof = false;

    // Handle byte limited EOF
    if (_byteLimit == 0)
        _eof = true;
    // else loop until something is read.
    else
        while (!_eof && n == 0 && _buf.length > _contents) {
            // try to read as much as will fit.
            int space = _buf.length - _contents;

            n = in.read(_buf, _contents, space);

            if (n <= 0) {
                // If no bytes - we could be NBIO, so we want to avoid
                // a busy loop.
                if (n == 0) {
                    // Yield to give a chance for some bytes to turn up
                    Thread.yield();

                    // Do a byte read as that is blocking
                    int b = in.read();
                    if (b >= 0) {
                        n = 1;
                        _buf[_contents++] = (byte) b;
                    } else
                        _eof = true;
                } else
                    _eof = true;
            } else
                _contents += n;
            _avail = _contents;

            // If we have a byte limit
            if (_byteLimit > 0) {
                // adjust the bytes available
                if (_contents - _pos >= _byteLimit)
                    _avail = _byteLimit + _pos;

                if (n > _byteLimit)
                    _byteLimit = 0;
                else if (n >= 0)
                    _byteLimit -= n;
                else if (n == -1)
                    throw new IOException("Premature EOF");
            }
        }

    // If we have some characters and the last read was a CR and
    // the first char is a LF, skip it
    if (_avail - _pos > 0 && _lastCr && _buf[_pos] == LF) {
        _seenCrLf = true;
        _pos++;
        if (_mark >= 0)
            _mark++;
        _lastCr = false;

        // If the byte limit has just been imposed, dont count
        // LF as content.
        if (_byteLimit >= 0 && _newByteLimit) {
            if (_avail < _contents)
                _avail++;
            else
                _byteLimit++;
        }
        // If we ate all that ws filled, fill some more
        if (_pos == _avail)
            fill();
    }
    _newByteLimit = false;
}

---

From source file:org.trianacode.taskgraph.service.RunnableTask.java

/**
 * creates the thread to run the unit, or set a flag to re-run the existing thread
 *//*from   w w w.j  av  a2  s.  c  o m*/
public final synchronized void startThread() {
    boolean handled = false;
    wakeups.clear();

    do {
        synchronized (THREAD_LOCK) {
            if (threadstate != UNSTABLE) {
                executionRequested();

                if (threadstate == IN_PROCESS) {
                    runAgain++;
                } else {
                    runAgain = 0;
                    threadstate = UNSTABLE;

                    getProperties().getEngine().execute(this);
                }
                handled = true;
            } else {
                Thread.yield();
            }
        }
    } while (!handled);
}

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From source file:org.apache.synapse.transport.mail.MailEchoRawXMLTest.java

public void testRoundTripIMAPKoreanCharset() throws Exception {

    String msgId = UUIDGenerator.getUUID();
    Options options = new Options();
    options.setTo(new EndpointReference("mailto:synapse.test.7@gmail.com"));
    options.setReplyTo(new EndpointReference("mailto:synapse.test.0@gmail.com"));
    options.setAction(Constants.AXIS2_NAMESPACE_URI + "/echoOMElement");
    options.setMessageId(msgId);//from w  ww .  j a va  2s . c  o m
    options.setProperty(Constants.Configuration.CHARACTER_SET_ENCODING, KOREAN_CHARSET);

    ServiceClient sender = new ServiceClient(getClientCfgCtx(), null);
    sender.setOptions(options);
    sender.fireAndForget(createKoreanPayload());

    Thread.yield();
    Thread.sleep(1000 * 10);

    Object reply = null;
    boolean replyNotFound = true;
    int retryCount = 3;
    while (replyNotFound) {
        log.debug("Checking for response ... with MessageID : " + msgId);
        reply = getMessage(msgId);
        if (reply != null) {
            replyNotFound = false;
        } else {
            if (retryCount-- > 0) {
                Thread.sleep(10000);
            } else {
                break;
            }
        }
    }

    if (reply != null && reply instanceof String) {
        log.debug("Result Body : " + reply);
        XMLStreamReader reader = StAXUtils.createXMLStreamReader(new StringReader((String) reply));
        SOAPEnvelope env = new StAXSOAPModelBuilder(reader).getSOAPEnvelope();
        if (env != null) {
            AXIOMXPath xpath = new AXIOMXPath("//my:myValue");
            xpath.addNamespace("my", "http://localhost/axis2/services/EchoXMLService");
            Object result = xpath.evaluate(env);
            if (result != null && result instanceof OMElement) {
                assertEquals(KOREAN_TEXT, ((OMElement) result).getText());
            }
        }
    } else {
        fail("Did not receive the reply mail");
    }
}

---

From source file:com.wifiafterconnect.WifiAuthenticator.java

public boolean attemptAuthentication(ParsedHttpInput currentPage, WifiAuthParams authParams) {

    notifyAuthentication(AuthStatus.INPROGRESS);
    CaptivePageHandler.States captiveState = CaptivePageHandler.States.HandleRedirects;
    /* Some portals supply as the first page ip, MAC etc 
     * inside of the form that has to be submitted onLoad.
     * Wandering WiFi is the worst offender.
     *//*from ww  w.j a  v a2 s.  c  o m*/
    while (captiveState != CaptivePageHandler.States.Success
            && captiveState != CaptivePageHandler.States.Failed) {

        debug("Handling pre-auth redirects. parsedPage = " + currentPage);
        // don't want to do meta http-equiv=refresh here as it is used to detect browsers with no JS support
        // and display error requiring it
        if ((currentPage = currentPage.handleAutoRedirects(Constants.MAX_AUTOMATED_REQUESTS, false)) == null) {
            error("Failed to follow the sequence of redirects...");
            notifyAuthentication(AuthStatus.FAIL);
            return false;
        }
        debug("Done handling pre-auth redirects. parsedPage = " + currentPage);

        if (!currentPage.isKnownCaptivePortal()) {
            error("Unknown Captive portal. Aborting.");
            notifyAuthentication(AuthStatus.FAIL);
            return false;
        }

        if (!checkTNCShown(currentPage)) {
            notifyAuthentication(AuthStatus.FAIL);
            return false; // it is the first time that user connected to this SSID , 
            // so we let them go through the proper web authentication.
        }

        debug("Checking for missing inputs at [" + currentPage.getURL() + "]");
        if (authParams == null) {
            authParams = getStoredAuthParams();

            if (currentPage.checkParamsMissing(authParams)) {
                requestUserParams(currentPage);
                // we will have to try authentication directly from user-facing activity
                return false;
            }
        }

        debug("Attempting authentication at [" + currentPage.getURL() + "]");
        ParsedHttpInput nextPage = currentPage.authenticateCaptivePortal(authParams);
        captiveState = (nextPage == null) ? CaptivePageHandler.States.Failed
                : currentPage.getCaptivePortalState();
        currentPage = nextPage;
    }

    AuthStatus status = AuthStatus.valueOf(captiveState);

    if (status.isSuccess()) {
        debug("Re-checking connection ...");
        URLRedirectChecker checker = new URLRedirectChecker(this);
        status = AuthStatus.valueOf(checker.checkHttpConnection(AuthorizationType.None));
        if (status.isSuccess()) {
            WifiAuthDatabase wifiDb = getDb();
            debug("Saving Auth Params. db = [" + wifiDb + "]");
            if (wifiDb != null)
                wifiDb.storeAuthParams(authHost, authParams);
            if (getContext() != null) {
                cancelWatchdogNotification();
                try {
                    //Toast.makeText(context, context.getText(R.string.success_notification) + " " + authHost, Toast.LENGTH_SHORT).show();
                } catch (Throwable e) {
                    // don't care
                }
                // do we need this so that Toast would actually display ?
                Thread.yield();
            }
        }
    }

    notifyAuthentication(status);
    return status.isSuccess();
}

---

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

/**
 * Worker Thread Method://  w ww.j av  a  2s  .com
 * Randomly selects a subscription and deletes it if no other threads are using that specific subscription
 */

public void deleteSubs() {
    final Random rand = SeedableThreadLocalRandom.current();
    int i;
    ThwackingElement sub;
    while (running) {
        if (active) {
            i = rand.nextInt(numberOfSubscriptions);
            sub = subs[i];
            sub.tryRemoveSub();
        }
        try {
            Thread.sleep(1);
        } catch (final InterruptedException e) {
            e.printStackTrace();
        }
        Thread.yield();
    }
    allDone.countDown();
    LOG.fine("DeleteSubs all done!");
}

---

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