Example usage for java.nio ByteBuffer allocate

List of usage examples for java.nio ByteBuffer allocate

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Introduction

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

Prototype

public static ByteBuffer allocate(int capacity)

Source Link

Document

Creates a byte buffer based on a newly allocated byte array.

Usage

From source file:com.facebook.infrastructure.net.UdpConnection.java

public boolean write(Message message, EndPoint to) throws IOException {
    boolean bVal = true;
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(bos);
    Message.serializer().serialize(message, dos);
    byte[] data = bos.toByteArray();
    if (data.length > 0) {
        logger_.trace("Size of Gossip packet " + data.length);
        byte[] protocol = BasicUtilities.intToByteArray(protocol_);
        ByteBuffer buffer = ByteBuffer.allocate(data.length + protocol.length);
        buffer.put(protocol);// ww  w.  jav  a 2  s  . c  o  m
        buffer.put(data);
        buffer.flip();

        int n = socketChannel_.send(buffer, to.getInetAddress());
        if (n == 0) {
            bVal = false;
        }
    }
    return bVal;
}

From source file:com.honeywell.printer.net.autobaln_websocket.WebSocketWriter.java

/**
 * Create new WebSockets background writer.
 *
 * @param looper    The message looper of the background thread on which
 *                  this object is running.
 * @param master    The message handler of master (foreground thread).
 * @param socket    The socket channel created on foreground thread.
 * @param options   WebSockets connection options.
 *//*from w  w  w.  j a  v  a  2s  .  co m*/
public WebSocketWriter(Handler master, Socket socket, WebSocketOptions options, String threadName) {
    super(threadName);

    this.mWebSocketConnectionHandler = master;
    this.mWebSocketOptions = options;
    this.mSocket = socket;

    this.mApplicationBuffer = ByteBuffer.allocate(options.getMaxFramePayloadSize() + 14);

    Log.d(TAG, "WebSocket writer created.");
}

From source file:com.turn.ttorrent.client.TorrentByteStorage.java

public ByteBuffer read(int offset, int length) throws IOException {
    ByteBuffer data = ByteBuffer.allocate(length);
    int bytes = this.channel.read(data, offset);
    data.clear();//from ww w. j  av  a2s  .  co m
    data.limit(bytes >= 0 ? bytes : 0);
    return data;
}

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

@Test
public void test() throws Exception {
    ByteBuffer buffer = ByteBuffer.allocate(1024);

    buffer.put("Hello World".getBytes("US-ASCII"));
    buffer.flip();//from w ww. java2 s.  c  o m
    Assert.assertEquals(11, staging.writeTempReadBytes(buffer));
    Assert.assertTrue(staging.hasTempReadBytes());
    buffer.clear();
    Assert.assertEquals(11, staging.readTempReadBytes(buffer));
    buffer.put("Hello World".getBytes("US-ASCII"));
    buffer.flip();
    staging.writePrimaryStaging(buffer, 22);
    buffer.clear();
    staging.getPrimaryStage().read(buffer);
    Assert.assertEquals("Hello WorldHello World", new String(buffer.array(), 0, 22));
}

From source file:com.bah.culvert.util.Bytes.java

/**
 * Convert a character to a byte[]// w  ww  . j a  v a2 s .  c om
 * @param c
 * @return
 */
public static byte[] toBytes(char c) {
    int bytes = Character.SIZE / 8;
    return ByteBuffer.allocate(bytes).putChar(c).array();
}

From source file:com.google.cloud.public_datasets.nexrad2.GcsUntar.java

private static File downloadFromGcs(String bucketName, String blobName, File tmpDir) throws IOException {
    Storage storage = StorageOptions.getDefaultInstance().getService();
    File fileName = File.createTempFile("download", "bytes", tmpDir);
    try (ReadChannel reader = storage.reader(bucketName, blobName);
            FileOutputStream writer = new FileOutputStream(fileName)) {
        ByteBuffer bytes = ByteBuffer.allocate(64 * 1024);
        while (reader.read(bytes) > 0) {
            bytes.flip();/*from w w  w.jav  a  2 s. c  om*/
            writer.getChannel().write(bytes);
            bytes.clear();
        }
    }
    return fileName;
}

From source file:edu.umn.cs.spatialHadoop.nasa.HDFRasterLayer.java

@Override
public void write(DataOutput out) throws IOException {
    super.write(out);
    out.writeLong(timestamp);/*from   w ww  . j ava  2s. co  m*/
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    GZIPOutputStream gzos = new GZIPOutputStream(baos);
    ByteBuffer bbuffer = ByteBuffer.allocate(getHeight() * 2 * 8 + 8);
    bbuffer.putInt(getWidth());
    bbuffer.putInt(getHeight());
    gzos.write(bbuffer.array(), 0, bbuffer.position());
    for (int x = 0; x < getWidth(); x++) {
        bbuffer.clear();
        for (int y = 0; y < getHeight(); y++) {
            bbuffer.putLong(sum[x][y]);
            bbuffer.putLong(count[x][y]);
        }
        gzos.write(bbuffer.array(), 0, bbuffer.position());
    }
    gzos.close();

    byte[] serializedData = baos.toByteArray();
    out.writeInt(serializedData.length);
    out.write(serializedData);
}

From source file:com.jadarstudios.rankcapes.bukkit.CapePackValidator.java

/**
 * Utility method to detect if the bytes given are a zip file.
 *
 * @param bytes the bytes of the file/*from   w ww .  j  a v  a2  s .  co  m*/
 *
 * @return if it is a zip file
 */
public static boolean isZipFile(byte[] bytes) {
    ByteArrayInputStream input = new ByteArrayInputStream(bytes);

    ByteBuffer buffer = ByteBuffer.allocate(4);
    input.read(buffer.array(), 0, buffer.capacity());

    short packIdentifier = buffer.getShort();

    return packIdentifier == ZIP_IDENTIFIER;
}

From source file:eu.stratosphere.api.java.record.io.TextInputFormat.java

@Override
public void configure(Configuration parameters) {
    super.configure(parameters);

    // get the charset for the decoding
    String charsetName = parameters.getString(CHARSET_NAME, DEFAULT_CHARSET_NAME);
    if (charsetName == null || !Charset.isSupported(charsetName)) {
        throw new RuntimeException("Unsupported charset: " + charsetName);
    }/*from  ww  w .  j  a v  a  2s. co m*/

    if (charsetName.equals("ISO-8859-1") || charsetName.equalsIgnoreCase("ASCII")) {
        this.ascii = true;
    } else {
        this.decoder = Charset.forName(charsetName).newDecoder();
        this.byteWrapper = ByteBuffer.allocate(1);
    }

    // get the field position to write in the record
    this.pos = parameters.getInteger(FIELD_POS, 0);
    if (this.pos < 0) {
        throw new RuntimeException("Illegal configuration value for the target position: " + this.pos);
    }
}

From source file:com.unister.semweb.drums.api.DRUMSTest.java

/**
 * This method is for testing the binary search in DRUMS.findElementInReadBuffer()
 * //from   w w  w  .j a va 2s  . co m
 * @throws IOException
 * @throws ClassNotFoundException
 */
@Test
public void findElementInReadBufferTest() throws IOException, ClassNotFoundException {
    log.info("Test Binary search. findElementInReadBufferTest()");
    DRUMS<DummyKVStorable> table = DRUMSInstantiator.createOrOpenTable(hashFunction, TestUtils.gp);
    // create data
    DummyKVStorable d1 = DummyKVStorable.getInstance();
    d1.setKey(new byte[] { 0, 0, 0, 0, 0, 0, 0, 1 });
    DummyKVStorable d2 = DummyKVStorable.getInstance();
    d2.setKey(new byte[] { 0, 0, 0, 0, 0, 0, 0, 2 });
    DummyKVStorable d3 = DummyKVStorable.getInstance();
    d3.setKey(new byte[] { 0, 0, 0, 0, 0, 0, 0, 3 });
    ByteBuffer bb = ByteBuffer.allocate(3 * TestUtils.gp.getElementSize());
    bb.put(d1.toByteBuffer().array());
    bb.put(d2.toByteBuffer().array());
    bb.put(d3.toByteBuffer().array());

    Assert.assertEquals(-1, table.findElementInReadBuffer(bb, new byte[] { 0, 0, 0, 0, 0, 0, 0, 0 }, 0));
    Assert.assertEquals(0, table.findElementInReadBuffer(bb, new byte[] { 0, 0, 0, 0, 0, 0, 0, 1 }, 0));
    Assert.assertEquals(1 * TestUtils.gp.getElementSize(),
            table.findElementInReadBuffer(bb, new byte[] { 0, 0, 0, 0, 0, 0, 0, 2 }, 0));
    Assert.assertEquals(2 * TestUtils.gp.getElementSize(),
            table.findElementInReadBuffer(bb, new byte[] { 0, 0, 0, 0, 0, 0, 0, 3 }, 0));
    Assert.assertEquals(2 * TestUtils.gp.getElementSize(), table.findElementInReadBuffer(bb,
            new byte[] { 0, 0, 0, 0, 0, 0, 0, 3 }, 1 * TestUtils.gp.getElementSize()));
    Assert.assertEquals(2 * TestUtils.gp.getElementSize(), table.findElementInReadBuffer(bb,
            new byte[] { 0, 0, 0, 0, 0, 0, 0, 3 }, 2 * TestUtils.gp.getElementSize()));
    Assert.assertEquals(-1, table.findElementInReadBuffer(bb, new byte[] { 0, 0, 0, 0, 0, 0, 0, 3 },
            3 * TestUtils.gp.getElementSize()));
}