Example usage for java.lang System gc

List of usage examples for java.lang System gc

  1. HOME
  2. Java
  3. java
  4. java.lang.*
  5. System
  6. gc

Introduction

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

Prototype

public static void gc()

Source Link

Document

Runs the garbage collector in the Java Virtual Machine.

Usage

From source file:edu.iu.daal_naive.NaiveDaalCollectiveMapper.java

protected void mapCollective(KeyValReader reader, Context context) throws IOException, InterruptedException {

    // long startTime = System.currentTimeMillis();
    List<String> trainingDataFiles = new LinkedList<String>();

    //splitting files between mapper
    while (reader.nextKeyValue()) {
        String key = reader.getCurrentKey();
        String value = reader.getCurrentValue();
        LOG.info("Key: " + key + ", Value: " + value);
        System.out.println("file name : " + value);
        trainingDataFiles.add(value);/*ww w .  ja va  2  s . com*/
    }

    Configuration conf = context.getConfiguration();

    Path pointFilePath = new Path(trainingDataFiles.get(0));
    System.out.println("path = " + pointFilePath.getName());
    FileSystem fs = pointFilePath.getFileSystem(conf);
    FSDataInputStream in = fs.open(pointFilePath);

    runNaive(trainingDataFiles, conf, context);
    // LOG.info("Total time of iterations in master view: "
    //   + (System.currentTimeMillis() - startTime));
    this.freeMemory();
    this.freeConn();
    System.gc();
}

From source file:com.amalto.workbench.editors.XSDDriver.java

public String outputXSD() {
    StringBuffer buffer = new StringBuffer();
    FileReader reader;//from   w  w w .  j av a  2s .c  om
    try {
        reader = new FileReader(outPut);
        BufferedReader bufferedReader = new BufferedReader(reader);

        String nextLine = bufferedReader.readLine();
        while (nextLine != null) {
            buffer.append(nextLine);
            buffer.append("\r\n");//$NON-NLS-1$
            nextLine = bufferedReader.readLine();
        }
        reader.close();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        log.error(e.getMessage(), e);
    } finally {
        boolean result = false;
        int tryCount = 0;
        while (!result && tryCount++ < 10) {
            System.gc();
            result = delete(outPut);
        }
    }

    return buffer.toString();
}

From source file:at.tuwien.minimee.migration.engines.MiniMeeDefaultMigrationEngine.java

/**
 * migrates a bytestream using the provided toolconfig and params,
 * and measures elapsed time.//from  ww  w . j  a v a 2s  .c  om
 * 
 */
public boolean migrate(byte[] data, ToolConfig config, String params, MigrationResult result) {
    System.gc();
    boolean success = false;
    /**
     * we use this variable - time - for uniquely identifying all
     * files. This is handed down the working methods and appended
     * to temp files. Using nanoTime is sufficiently safe to avoid duplicates.
     */
    long time = System.nanoTime();
    String inputFile = prepareInputFile(data, config, time);
    String outputFile = prepareOutputFile(config, time);

    try {
        String command = prepareCommand(config, params, inputFile, outputFile, time);

        IRunner runner = makeRunner(command, config);
        RunInfo r = runner.run();

        result.setSuccessful(r.isSuccess());
        result.setReport(r.getReport());

        byte[] migratedFile = new byte[] {};
        try {
            migratedFile = FileUtils.getBytesFromFile(new File(outputFile));
            DigitalObject u = new DigitalObject();
            u.getData().setData(migratedFile);
            FormatInfo tFormat = new FormatInfo();
            tFormat.setDefaultExtension(config.getOutEnding());
            result.setTargetFormat(tFormat);
            result.setMigratedObject(u);
        } catch (Exception e) {
            log.error("Could not get outputfile " + outputFile);
            result.setSuccessful(false);
            log.error(e);
        }
        collectData(config, time, result);

        double length = migratedFile.length;
        double elapsed = r.getElapsedTimeMS();
        double elapsedPerMB = ((double) elapsed) / (getMByte(data));

        Measurement me = new Measurement(MigrationResult.MIGRES_ELAPSED_TIME, elapsed);
        result.getMeasurements().put(MigrationResult.MIGRES_ELAPSED_TIME, me);

        for (MeasurableProperty property : getMeasurableProperties()) {
            if (!property.getName().startsWith("machine:")) {
                Measurement m = new Measurement();
                m.setProperty(property);
                PositiveFloatValue v = (PositiveFloatValue) property.getScale().createValue();
                if (property.getName().equals(MigrationResult.MIGRES_ELAPSED_TIME)) {
                    v.setValue(elapsed);
                    m.setValue(v);
                    result.getMeasurements().put(property.getName(), m);
                } else if (property.getName().equals(MigrationResult.MIGRES_ELAPSED_TIME_PER_MB)) {
                    v.setValue(elapsedPerMB);
                    m.setValue(v);
                    result.getMeasurements().put(property.getName(), m);
                } else if (property.getName().equals(MigrationResult.MIGRES_RELATIVE_FILESIZE)) {
                    v.setValue(((double) length) / data.length * 100);
                    m.setValue(v);
                    result.getMeasurements().put(property.getName(), m);
                } else if (property.getName().equals(MigrationResult.MIGRES_RESULT_FILESIZE)) {
                    v.setValue((double) length);
                    m.setValue(v);
                    result.getMeasurements().put(property.getName(), m);
                }
            }
        }

        success = r.isSuccess();
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        return false;
    } finally {
        cleanup(time, inputFile, outputFile);
    }
    return success;

}

From source file:com.secretlisa.lib.utils.BaseImageLoader.java

public Bitmap downloadBitmap(final String imageUrl) {
    // AndroidHttpClient is not allowed to be used from the main thread
    final HttpClient client = new DefaultHttpClient();
    // ??//from   w w  w  . j  av  a2s . com
    int netType = NetworkUtil.getNetworkType(mContext);
    if (netType == NetworkUtil.TYPE_WAP) {
        String proxyHost = android.net.Proxy.getDefaultHost();
        if (proxyHost != null) {
            HttpHost proxy = new HttpHost(proxyHost, android.net.Proxy.getDefaultPort());
            client.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
        }
    }
    final HttpGet getRequest = new HttpGet(imageUrl);
    try {
        HttpResponse response = client.execute(getRequest);
        final int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode != HttpStatus.SC_OK) {
            return null;
        }
        final HttpEntity entity = response.getEntity();
        if (entity != null) {
            try {
                final byte[] respBytes = getBytes(entity.getContent());
                writeImageFile(imageUrl, respBytes);
                // Decode the bytes and return the bitmap.
                return BitmapFactory.decodeByteArray(respBytes, 0, respBytes.length, null);
            } finally {
                entity.consumeContent();
            }

        }
    } catch (IOException e) {
        getRequest.abort();
    } catch (OutOfMemoryError e) {
        clearCache();
        System.gc();
    } catch (IllegalStateException e) {
        getRequest.abort();
    } catch (Exception e) {
        getRequest.abort();
    } finally {
    }
    return null;
}

From source file:com.algoTrader.service.SimulationServiceImpl.java

protected SimulationResultVO handleRunByUnderlayings() {

    long startTime = System.currentTimeMillis();

    // must call resetDB through ServiceLocator in order to get a transaction
    ServiceLocator.serverInstance().getSimulationService().resetDB();

    // init all activatable strategies
    List<Strategy> strategies = getStrategyDao().findAutoActivateStrategies();
    for (Strategy strategy : strategies) {
        getRuleService().initServiceProvider(strategy.getName());
        getRuleService().deployAllModules(strategy.getName());
    }/*from  w  w  w.j a v  a 2 s .c om*/

    // feed the ticks
    inputCSV();

    // get the results
    SimulationResultVO resultVO = getSimulationResultVO(startTime);

    // destroy all service providers
    for (Strategy strategy : strategies) {
        getRuleService().destroyServiceProvider(strategy.getName());
    }

    // reset all configuration variables
    ConfigurationUtil.resetConfig();

    // run a garbage collection
    System.gc();

    return resultVO;
}

From source file:imageencode.ImageEncode.java

public void decode(final String filePath, final Element node) throws IOException {
    final File imageFile = new File(filePath);
    final OutputStream os = new FileOutputStream(imageFile);
    String encodedImage = node.getTextContent();
    // String decoded = decode(encodedImage);
    // os.write(decoded);
    final Runtime runtime = Runtime.getRuntime();
    System.out.println("Free memory : " + runtime.freeMemory());
    String[] sei = encodedImage.split("\r\n");
    // System.out.println(encodedImage);
    System.out.println("Free memory : " + runtime.freeMemory());
    for (final String element : sei) {
        final byte[] byteImage = Base64.decodeBase64(element);
        try {// w w w.  ja va2 s.c o  m
            os.write(byteImage);
        } catch (final FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    os.close();
    System.out.println("Free memory : " + runtime.freeMemory());
    encodedImage = null;
    sei = null;
    System.gc();
    System.out.println("Free memory : " + runtime.freeMemory());
}

From source file:at.ac.tuwien.qse.sepm.gui.FullscreenWindow.java

private void loadImage() {

    if (photos.size() == 0 || photos.size() <= activeIndex) {
        // out of bounds
        return;//from w w  w  . j  a v  a2s .c o m
    }

    Photo photo = photos.get(activeIndex);
    ratingPicker.setRating(photo.getData().getRating());
    image.setImage(photo.getFile());

    // handling of images in original size can consume a lot of memory so collect it here
    System.gc();
}

From source file:ImageEncode.java

public void decode(String filePath, Element node) throws IOException {
    final File imageFile = new File(filePath);
    final OutputStream os = new FileOutputStream(imageFile);
    String encodedImage = node.getTextContent();
    // String decoded = decode(encodedImage);
    // os.write(decoded);
    final Runtime runtime = Runtime.getRuntime();
    System.out.println("Free memory : " + runtime.freeMemory());
    String[] sei = encodedImage.split("\r\n");
    // System.out.println(encodedImage);
    System.out.println("Free memory : " + runtime.freeMemory());
    for (final String element : sei) {
        final byte[] byteImage = Base64.decodeBase64(element);
        try {/*from   ww w.  j av a  2s.c o  m*/
            os.write(byteImage);
        } catch (final FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    os.close();
    System.out.println("Free memory : " + runtime.freeMemory());
    encodedImage = null;
    sei = null;
    System.gc();
    System.out.println("Free memory : " + runtime.freeMemory());
}

From source file:de.csw.expertfinder.test.pos.TestPartOfSpeechTagger.java

/**
 * Tests the MorphAdorner POS tagger./*  w ww.ja va2s .co  m*/
 * @throws Exception
 */
@Test(dataProvider = "morphAdornerDataProvider")
public void testMorphAdorner(List<List<String>> sentences, Class<PartOfSpeechTagger> taggerClass,
        Class<Lemmatizer> lemmatizerClass) throws Exception {

    StopWatch stopWatch = new StopWatch();

    // initialize POS tagger (can take long if lexicon based)
    stopWatch.start();

    PartOfSpeechTagger partOfSpeechTagger = taggerClass.newInstance();

    stopWatch.stop();

    if (log.isDebugEnabled())
        log.debug("Initializing POS tagger (" + taggerClass.getSimpleName() + "): " + stopWatch);

    // Initialize lemmatizer
    stopWatch.reset();
    stopWatch.start();

    Lemmatizer lemmatizer = lemmatizerClass.newInstance();

    stopWatch.stop();

    if (log.isDebugEnabled())
        log.debug("Initializing lemmatizer (" + lemmatizerClass.getSimpleName() + "): " + stopWatch);

    // POS tag sentences
    stopWatch.reset();
    stopWatch.start();

    List<List<AdornedWord>> taggedSentences = partOfSpeechTagger.tagSentences(sentences);

    stopWatch.stop();

    if (log.isDebugEnabled())
        log.debug("Tagging words: " + stopWatch);

    Lexicon wordLexicon = partOfSpeechTagger.getLexicon();

    SpellingStandardizer standardizer = new DefaultSpellingStandardizer();

    lemmatizer.setDictionary(standardizer.getStandardSpellings());

    //   Get the part of speech tags from
    //   the word lexicon.

    PartOfSpeechTags partOfSpeechTags = wordLexicon.getPartOfSpeechTags();

    WordTokenizer spellingTokenizer = new PennTreebankTokenizer();

    // write results to file
    FileWriter out = new FileWriter("posresult_" + taggerClass.getSimpleName() + ".txt");

    for (int i = 0; i < sentences.size(); i++) {
        //  Get the next adorned sentence.
        //  This contains a list of adorned
        //  words.  Only the spellings
        //  and part of speech tags are
        //  guaranteed to be defined.

        List<AdornedWord> sentence = taggedSentences.get(i);

        out.write("---------- Sentence " + (i + 1) + " ----------");

        //  Print out the spelling and part(s)
        //  of speech for each word in the
        //  sentence.  Punctuation is treated
        //  as a word too.

        for (int j = 0; j < sentence.size(); j++) {
            AdornedWord adornedWord = sentence.get(j);

            setLemma(adornedWord, wordLexicon, lemmatizer, partOfSpeechTags, spellingTokenizer);

            out.write(StringUtils.rpad((j + 1) + "", 3) + ": "
                    + StringUtils.rpad("spell: " + adornedWord.getSpelling(), 20)
                    + StringUtils.rpad("lemmata: " + adornedWord.getLemmata(), 20)
                    + adornedWord.getPartsOfSpeech() + "\n");
        }
    }

    out.close();

    partOfSpeechTagger = null;
    System.gc();
}

From source file:edu.iu.daal_nn.NNDaalCollectiveMapper.java

protected void mapCollective(KeyValReader reader, Context context) throws IOException, InterruptedException {
    long startTime = System.currentTimeMillis();
    List<String> trainingDataFiles = new LinkedList<String>();
    List<String> trainingDataGroundTruthFiles = new LinkedList<String>();

    //splitting files between mapper

    while (reader.nextKeyValue()) {
        String key = reader.getCurrentKey();
        String value = reader.getCurrentValue();
        LOG.info("Key: " + key + ", Value: " + value);
        System.out.println("file name : " + value);
        trainingDataFiles.add(value);//from  w  ww  . j  a  v  a 2s  .c om
    }

    Configuration conf = context.getConfiguration();

    Path pointFilePath = new Path(trainingDataFiles.get(0));
    System.out.println("path = " + pointFilePath.getName());
    FileSystem fs = pointFilePath.getFileSystem(conf);
    FSDataInputStream in = fs.open(pointFilePath);

    runNN(trainingDataFiles, conf, context);
    LOG.info("Total iterations in master view: " + (System.currentTimeMillis() - startTime));
    this.freeMemory();
    this.freeConn();
    System.gc();
}