Example usage for com.google.common.hash Hasher hash

Introduction

In this page you can find the example usage for com.google.common.hash Hasher hash.

Prototype

@CheckReturnValue
HashCode hash();

Source Link

Document

Computes a hash code based on the data that have been provided to this hasher.

Usage

From source file:org.locationtech.geogig.plumbing.HashObject.java

/**
 * Hashes a RevObject using a SHA1 hasher.
 * /*from  w w w  .ja v  a  2s  .c om*/
 * @return a new ObjectId created from the hash of the RevObject.
 */
@Override
protected ObjectId _call() {
    Preconditions.checkState(object != null, "Object has not been set.");

    final Hasher hasher = ObjectId.HASH_FUNCTION.newHasher();
    @SuppressWarnings("unchecked")
    final Funnel<RevObject> funnel = (Funnel<RevObject>) FUNNELS[object.getType().value()];
    funnel.funnel(object, hasher);
    final byte[] rawKey = hasher.hash().asBytes();
    final ObjectId id = ObjectId.createNoClone(rawKey);

    return id;
}

From source file:org.fim.model.State.java

public String hashState() {
    HashFunction hashFunction = Hashing.sha512();
    Hasher hasher = hashFunction.newHasher(Constants._10_MB);
    hashObject(hasher);//from w w w. j ava  2  s.co  m
    HashCode hash = hasher.hash();
    return hash.toString();
}

From source file:com.spotify.heroic.cache.memcached.MemcachedQueryCache.java

private String buildCacheKey(final FullQuery.Request request) {
    final Hasher hasher = HASH_FUNCTION.newHasher();
    request.hashTo(new ObjectHasher(hasher));
    return PREFIX + hasher.hash().toString();
}

From source file:org.openmicroscopy.shoola.keywords.ThumbnailCheckLibrary.java

/**
 * <table>/* w  w w. j  a  v a 2 s  . co m*/
 *   <td>Get Thumbnail Hash</td>
 *   <td>name of image whose thumbnail is queried</td>
 * </table>
 * @param imageFilename the name of the image
 * @return the hash of the thumbnail canvas image
 * @throws MultipleComponentsFoundException if multiple thumbnails exist for the given name
 * @throws ComponentNotFoundException if no thumbnails exist for the given name
 */
public String getThumbnailHash(String imageFilename)
        throws ComponentNotFoundException, MultipleComponentsFoundException {
    final RenderedImage image = captureImage("thumbnail", imageFilename);
    final IteratorIntPixel pixels = new IteratorIntPixel(image);
    final Hasher hasher = Hashing.goodFastHash(128).newHasher();
    while (pixels.hasNext()) {
        hasher.putInt(pixels.next());
    }
    return hasher.hash().toString();
}

From source file:io.divolte.server.ShortTermDuplicateMemory.java

/**
 * Query whether an event has been seen before or not, based on event properties.
 * @param eventProperties   An array of values that are specific to the event.
 * @return <code>true</code> if we have probably seen this event previously, or
 *  false otherwise.//ww w . ja va2  s .c om
 */
public boolean isProbableDuplicate(final String... eventProperties) {
    final Hasher hasher = HASHING_FUNCTION.newHasher();
    for (final String eventProperty : eventProperties) {
        hasher.putString(eventProperty, StandardCharsets.UTF_8);
    }
    return isProbablyDuplicate(hasher.hash());
}

From source file:org.gradle.api.internal.changedetection.state.DefaultClasspathEntryHasher.java

private HashCode hashFile(FileDetails fileDetails, Hasher hasher,
        ClasspathContentHasher classpathContentHasher) {
    try {/*from   w  ww  . jav a 2  s .c o  m*/
        byte[] content = Files.toByteArray(new File(fileDetails.getPath()));
        if (classpathContentHasher.updateHash(fileDetails, hasher, content)) {
            return hasher.hash();
        }
        return null;
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}

From source file:com.spotify.heroic.aggregation.cardinality.ExactCardinalityBucket.java

@Override
public void update(final Map<String, String> key, final Metric d) {
    final Hasher hasher = HASH_FUNCTION.newHasher();

    if (includeKey) {
        for (final String k : KEY_ORDER.sortedCopy(key.keySet())) {
            hasher.putString(k, Charsets.UTF_8).putString(key.get(k), Charsets.UTF_8);
        }//from  ww  w  .ja v a  2s  . c o m
    }

    d.hash(hasher);

    if (seen.add(hasher.hash())) {
        count.incrementAndGet();
    }
}

From source file:com.mac.holdempoker.app.impl.SimplePlayer.java

private void setPid(String... pidParts) {
    HashFunction hf = Hashing.md5();/*from ww w  .  j  av  a  2s.c  om*/
    Hasher hasher = hf.newHasher();
    for (String str : pidParts) {
        hasher.putString(str, Charset.forName("UTF-8"));
    }
    HashCode hc = hasher.hash();
    this.setPlayerId(hc.toString());
}

From source file:com.spotify.heroic.aggregation.cardinality.HyperLogLogCardinalityBucket.java

@Override
public void update(final Map<String, String> key, final Metric d) {
    final Hasher hasher = HASH_FUNCTION.newHasher();

    if (includeKey) {
        for (final String k : KEY_ORDER.sortedCopy(key.keySet())) {
            hasher.putString(k, Charsets.UTF_8).putString(key.get(k), Charsets.UTF_8);
        }//  w w  w . ja v  a  2 s . c  om
    }

    d.hash(hasher);

    final long hash = hasher.hash().asLong();
    seen.offerHashed(hash);
}

From source file:org.apache.flink.streaming.api.graph.StreamGraphHasherV2.java

/**
 * Generates a hash from a user-specified ID.
 *//*w w  w  .  j  a va2s . co  m*/
private byte[] generateUserSpecifiedHash(StreamNode node, Hasher hasher) {
    hasher.putString(node.getTransformationUID(), Charset.forName("UTF-8"));

    return hasher.hash().asBytes();
}