Example usage for java.lang System nanoTime

List of usage examples for java.lang System nanoTime

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Introduction

In this page you can find the example usage for java.lang System nanoTime.

Prototype

@HotSpotIntrinsicCandidate
public static native long nanoTime();

Source Link

Document

Returns the current value of the running Java Virtual Machine's high-resolution time source, in nanoseconds.

Usage

From source file:com.amazon.janusgraph.diskstorage.dynamodb.DynamoDBStoreTransaction.java

public DynamoDBStoreTransaction(BaseTransactionConfig config) {
    super(config);
    id = Constants.HEX_PREFIX + Long.toHexString(System.nanoTime());
    LOG.debug("begin id:{} config:{}", id, config);
}

From source file:copter.HCSR04.java

private float getDistance(GpioPinDigitalOutput pinTrig, GpioPinDigitalInput pinEcho) {
    float result = 0.0F;
    trigger(pinTrig);//from   w w  w  .  j a va 2s  .  co  m
    if (!echoHigh(pinEcho)) {
        return -1;
    }
    long start = System.nanoTime();
    if (!echoLow(pinEcho)) {
        return -1;
    }
    long end = System.nanoTime();
    long pulse = end - start;
    result = pulse / 1_000_000_000F;
    result = result * soundSpeed / 2;
    return result;
}

From source file:com.xuggle.xuggler.ConverterExhaustiveTest.java

/**
 * This test makes sure that real-time writing of data works; this
 * MUST run at least longer than the file in question, so use a short
 * file for testing./*w ww .j a v a 2 s.com*/
 * @throws ParseException 
 */
public void testRealTimeConversion() throws ParseException {
    String[] args = new String[] { "--containerformat", "mov", "--acodec", "libmp3lame", "--asamplerate",
            "22050", "--achannels", "2", "--abitrate", "64000", "--aquality", "0", "--vcodec", "mpeg4",
            "--vscalefactor", "1.0", "--vbitrate", "300000", "--vbitratetolerance", "12000000", "--vquality",
            "0", "--realtime", "fixtures/testfile_videoonly_20sec.flv",
            this.getClass().getName() + "_" + this.getName() + ".mov" };

    converter = new Converter();

    Options options = converter.defineOptions();

    CommandLine cmdLine = converter.parseOptions(options, args);
    assertTrue("all commandline options successful", cmdLine != null);

    final long startTime = System.nanoTime();
    converter.run(cmdLine);
    final long endTime = System.nanoTime();
    final long delta = endTime - startTime;
    // 20 second test file;
    assertTrue("did not take long enough", delta >= 18L * 1000 * 1000 * 1000);
    assertTrue("took too long", delta <= 60L * 1000 * 1000 * 1000);
}

From source file:com.ideabase.repository.core.service.HashMapStateManagerImpl.java

public String generateRequestStateToken() {
    final StringBuilder builder = new StringBuilder();
    builder.append(mPrefix).append(System.nanoTime()).append(Math.random() * 100).append(mSuffix);
    return DigestUtils.shaHex(builder.toString());
}

From source file:gridool.util.GridUtils.java

@Nonnull
public static String generateJobId(@Nonnull String localNodeId, @Nonnull GridJob job) {
    final long time = System.nanoTime();
    final int hashcode = System.identityHashCode(job);
    long tid = Thread.currentThread().getId();
    return localNodeId + '#' + Long.toString(time) + '/' + Integer.toString(hashcode) + 'T'
            + Long.toString(tid);
}

From source file:org.jinos.transport.HttpTransport.java

/**
 * Call the service// ww w .  ja v a 2  s.c o m
 *
 * @param <T> The return type
 * @param envelope The request envelope
 * @param resultClass The class of the result in the response
 * @param httpHeaders The custom Http headers
 * @return The response
 * @throws Exception An exception
 */

public <T> T call(String reqXMLString, Class<T> resultClass, Map<String, String> httpHeaders) throws Exception {
    try {
        long start = System.nanoTime();

        HttpPost post = new HttpPost(this.getUrl());
        post.setEntity(new StringEntity(reqXMLString));
        post.setHeader("Content-type", "text/xml; charset=UTF-8");
        if (httpHeaders != null) {
            for (Map.Entry<String, String> entry : httpHeaders.entrySet()) {
                post.setHeader(entry.getKey(), entry.getValue());
            }
        }
        /*  if (this.getUsername() != null && this.getPassword() != null)
          {
            post.addHeader("Authorization", "Basic " + Base64Encoder.encodeString(this.getUsername() + ":" + this.getPassword()));
          }*/

        HttpParams httpParameters = new BasicHttpParams();
        HttpConnectionParams.setConnectionTimeout(httpParameters, 5000);
        HttpConnectionParams.setSoTimeout(httpParameters, 6000);

        /* if (this.isDEBUG())
         {
           Log.i(this.getClass().getSimpleName(), "Request: " + envelope.toString());
         }*/

        HttpClient client = new DefaultHttpClient(httpParameters);
        HttpResponse response = client.execute(post);
        int status = response.getStatusLine().getStatusCode();

        Log.i(this.getClass().getSimpleName(), "The server has been replied. "
                + ((System.nanoTime() - start) / 1000) + "us, status is " + status);
        start = System.nanoTime();

        InputStream is = response.getEntity().getContent();

        if (true) {
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            StringBuilder sb = new StringBuilder();
            for (String line = br.readLine(); line != null; line = br.readLine()) {
                sb.append(line);
                sb.append("\n");
            }
            Log.i(this.getClass().getSimpleName(), "Response: " + sb.toString());
            br.close();
            isr.close();
            is.close();

            is = new ByteArrayInputStream(sb.toString().getBytes("UTF-8"));

            Log.i(this.getClass().getSimpleName(),
                    "DEBUG mode delay: " + ((System.nanoTime() - start) / 1000) + "us");
            start = System.nanoTime();
        }

        /*  GenericHandler handler = new GenericHandler(resultClass, this.isDEBUG());
          if (status == 200)
          {
            handler.parseWithPullParser(is);
          } else
          {
            throw new Exception("Can't parse the response, status: " + status);
          }
                
          Log.i(this.getClass().getSimpleName(), "The reply has been parsed: " + ((System.nanoTime() - start) / 1000) + "us");
        */
        //return (T) handler.getObject();
        return null;
    }

    catch (Exception e) {
        Log.e(this.getClass().getSimpleName(), e.toString(), e);
        throw e;
    }

}

From source file:com.hazelcast.simulator.worker.metronome.SleepingMetronome.java

@Override
public long waitForNext() {
    // set random interval on the first run
    if (nextNanos == 0) {
        nextNanos = nanoTime() + nextLong(0, intervalNanos);
    }/*from w  ww .j  av a  2s  .c o  m*/

    long now;
    while ((now = System.nanoTime()) < nextNanos) {
        LockSupport.parkNanos(nextNanos - now);
    }

    long expectedStartNanos = nextNanos;
    nextNanos += intervalNanos;
    return accountForCoordinatedOmission ? expectedStartNanos : nanoTime();
}

From source file:br.upe.ecomp.doss.algorithm.volitiveapso.WeightedAPSOParticle.java

/**
 * Updates the current position of the particle and the fitness variation.
 * //from  www  .  j a  v  a  2 s.  c o  m
 * @param problem The problem that we are trying to solve.
 */
public void updateCurrentPosition(Problem problem) {
    MersenneTwister random = new MersenneTwister(System.nanoTime());
    double[] position = getCurrentPosition();
    double[] nextPosition = new double[getDimensions()];
    double newPosition;
    for (int i = 0; i < getDimensions(); i++) {
        newPosition = position[i] + getVelocity()[i];

        // if a particle exceeds the search space limit, so inverts the particle velocity on
        // that dimension which the search space limit was exceeded
        if (newPosition >= problem.getUpperBound(i)) {
            position[i] = problem.getUpperBound(i) - getVelocity()[i] * random.nextDouble();
        } else if (newPosition <= problem.getLowerBound(i)) {
            position[i] = problem.getLowerBound(i) - getVelocity()[i] * random.nextDouble();
        } else {
            position[i] = newPosition;
        }
        nextPosition[i] = position[i];

    }

    deltaFitness = problem.getFitness(nextPosition) - getCurrentFitness();
    if (problem.isFitnessBetterThan(getCurrentFitness(), problem.getFitness(nextPosition))
            && deltaFitness < 0) {
        deltaFitness *= -1;
    }

    // The particle never reduces its weight
    if (!problem.isFitnessBetterThan(getCurrentFitness(), problem.getFitness(nextPosition))) {
        deltaFitness = 0;
    }

    previousPosition = getCurrentPosition().clone();
    updateCurrentPosition(nextPosition, problem.getFitness(nextPosition));

    if (problem.isFitnessBetterThan(getBestFitness(), getCurrentFitness())) {
        updateBestPosition(getCurrentPosition(), getCurrentFitness());
    }

}

From source file:com.disney.opa.fhb.util.FacilityUtil.java

/**
 * This method is to get relative file path on server
 * /*from  w  ww  . j  a  v  a  2s  . c om*/
 * @param document
 * @return relate file path
 * @throws Exception
 */
public String getFacilityDocumentFileNameOnServer(Document document) throws Exception {
    String fileNameOnServer = File.separator + document.getLicenseeId();
    if (document.getDocumentType() != FHBConstants.DOC_TYPE_RECALL_PLAN) {
        fileNameOnServer += File.separator + document.getFacilityId() + File.separator
                + document.getDocumentType();
    }
    String newFileName = String
            .valueOf(document.getDocumentId() != null ? document.getDocumentId() : System.nanoTime());
    String fileExt = attachmentUtils.getFileExtension(document.getFileName());
    if (StringUtils.isNotEmpty(fileExt)) {
        newFileName += "." + fileExt;
    }
    fileNameOnServer += File.separator + newFileName;
    return fileNameOnServer;
}

From source file:com.github.joulupunikki.math.random.XorShift1024Star.java

/**
 */
public XorShift1024Star() {
    init();
    this.s = new long[STATE_WORDS];
    setSeed(System.nanoTime());
}