Example usage for java.nio ByteBuffer rewind

Introduction

In this page you can find the example usage for java.nio ByteBuffer rewind.

Prototype

public final Buffer rewind()

Source Link

Document

Rewinds this buffer.

Usage

From source file:com.jordanwilliams.heftydb.test.generator.KeyValueGenerator.java

public synchronized ByteBuffer testValue(int size) {
    if (!testValues.containsKey(size)) {
        testValues.put(size, randomValue(size));
    }/* www  .  j a  va2s. co m*/

    ByteBuffer testValue = testValues.get(size).duplicate();
    testValue.rewind();
    return testValue;
}

From source file:com.jordanwilliams.heftydb.test.generator.KeyValueGenerator.java

public synchronized ByteBuffer testKey(int size, int reuseWeight) {
    int next = rand.nextInt(100);

    if (next <= reuseWeight && reuseWeight != 0 && testKeys.size() > 0) {
        ByteBuffer existing = testKeys.get(rand.nextInt(testKeys.size()));
        ByteBuffer reusedKey = existing.duplicate();
        reusedKey.rewind();
        return reusedKey;
    } else {//  www.ja  v  a2s .  c om
        ByteBuffer random = randomKey(size);

        if (testKeys.size() < MAX_CACHED_KEYS) {
            testKeys.add(random);
        }

        return random.duplicate();
    }
}

From source file:org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.java

private static Map<ApplicationId, Credentials> parseCredentials(
        Map<ApplicationId, ByteBuffer> systemCredentials) throws IOException {
    Map<ApplicationId, Credentials> map = new HashMap<ApplicationId, Credentials>();
    for (Map.Entry<ApplicationId, ByteBuffer> entry : systemCredentials.entrySet()) {
        Credentials credentials = new Credentials();
        DataInputByteBuffer buf = new DataInputByteBuffer();
        ByteBuffer buffer = entry.getValue();
        buffer.rewind();
        buf.reset(buffer);/*from   ww  w. ja v a 2s .  c  o  m*/
        credentials.readTokenStorageStream(buf);
        map.put(entry.getKey(), credentials);
    }
    if (LOG.isDebugEnabled()) {
        for (Map.Entry<ApplicationId, Credentials> entry : map.entrySet()) {
            LOG.debug("Retrieved credentials form RM for " + entry.getKey() + ": "
                    + entry.getValue().getAllTokens());
        }
    }
    return map;
}

From source file:org.apache.cassandra.cache.RowCacheKey.java

public ByteBuffer serializeForStorage() {
    ByteBuffer bytes = ByteBuffer.allocate(serializedSize());

    bytes.put(key.slice());//from   w  w w  .  ja v  a  2s.co  m
    bytes.rewind();

    return bytes;
}

From source file:com.github.neoio.net.message.staging.memory.TestMemoryMessageStaging.java

@Test
public void test_tempRead() {
    ByteBuffer buffer = ByteBuffer.allocate(1024);

    buffer.put("Hello World".getBytes());
    buffer.rewind();
    staging.writeTempReadBytes(buffer);//from  w  w w.j a  va 2 s  . co m
    Assert.assertTrue(staging.hasTempReadBytes());

    buffer.clear();
    staging.readTempReadBytes(buffer);
    Assert.assertEquals("Hello World",
            new String(ArrayUtils.subarray(buffer.array(), 0, "Hello World".getBytes().length)));
    staging.resetTempReadBytes();

    Assert.assertFalse(staging.hasTempReadBytes());
}

From source file:com.github.neoio.net.message.staging.memory.TestMemoryMessageStaging.java

@Test
public void test_tempWrite() {
    ByteBuffer buffer = ByteBuffer.allocate(1024);

    buffer.put("Hello World".getBytes());
    buffer.rewind();
    staging.writeTempWriteBytes(buffer);
    Assert.assertTrue(staging.hasTempWriteBytes());

    buffer.clear();//ww  w.j av a  2  s .c  o m
    staging.readTempWriteBytes(buffer);
    Assert.assertEquals("Hello World",
            new String(ArrayUtils.subarray(buffer.array(), 0, "Hello World".getBytes().length)));
    staging.resetTempWriteBytes();

    Assert.assertFalse(staging.hasTempWriteBytes());
}

From source file:com.hazelcast.simulator.probes.xml.HistogramConverter.java

@Override
public void marshal(Object object, HierarchicalStreamWriter writer, MarshallingContext marshallingContext) {
    Histogram histogram = (Histogram) object;
    int size = histogram.getNeededByteBufferCapacity();
    ByteBuffer byteBuffer = ByteBuffer.allocate(size);
    int bytesWritten = histogram.encodeIntoCompressedByteBuffer(byteBuffer);
    byteBuffer.rewind();
    byteBuffer.limit(bytesWritten);//from w w w .ja v a 2  s  .c  o  m
    String encodedHistogram = encodeBase64String(byteBuffer.array());

    writer.setValue(encodedHistogram);
}

From source file:ch.ledcom.jpreseed.UsbCreatorTest.java

private CpioArchiveInputStream getCpioArchiveInputStream(FsDirectoryEntry newInitRdGzEntry) throws IOException {
    FsFile initrdGzFile = newInitRdGzEntry.getFile();
    ByteBuffer initRdBuffer = ByteBuffer.allocate((int) initrdGzFile.getLength());
    initrdGzFile.read(0, initRdBuffer);/* w  w  w .  ja v  a 2 s  .c om*/
    initRdBuffer.rewind();
    return new CpioArchiveInputStream(new GZIPInputStream(new ByteBufferDataInputStream(initRdBuffer)));
}

From source file:org.apache.james.protocols.smtp.core.DataLineMessageHookHandler.java

private byte[] readBytes(ByteBuffer line) {
    line.rewind();
    byte[] bline;
    if (line.hasArray()) {
        bline = line.array();/*  w  w  w  . ja va  2s .  c  o  m*/
    } else {
        bline = new byte[line.remaining()];
        line.get(bline);
    }
    return bline;
}

From source file:org.ros.internal.message.new_style.ServiceLoader.java

private void addServiceDefinitionFromPaths(File searchPath, File servicePath, CharsetDecoder decoder)
        throws IOException {
    FileInputStream inputStream = new FileInputStream(servicePath);
    FileChannel channel = inputStream.getChannel();
    ByteBuffer buffer = ByteBuffer.allocate((int) channel.size());
    channel.read(buffer);//w  w w .j a v  a 2  s .com
    buffer.rewind();
    decoder.reset();
    String definition = decoder.decode(buffer).toString().trim();
    serviceDefinitions.put(pathToServiceName(searchPath, servicePath), definition);
    channel.close();
    inputStream.close();
}