Example usage for java.nio ByteBuffer flip

Introduction

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

Prototype

public final Buffer flip()

Source Link

Document

Flips this buffer.

Usage

From source file:com.example.IdGenerator.java

public long generateLong() {
    final LocalDateTime now = LocalDateTime.now(clock);
    final Duration duration = Duration.between(BASE, now);
    final int high = (int) duration.getSeconds();
    final int low = duration.getNano();
    final byte[] hbs = ByteBuffer.allocate(4).putInt(high).array();
    final byte[] lbs = ByteBuffer.allocate(4).putInt(low).array();
    final byte[] bytes = new byte[8];
    System.arraycopy(hbs, 0, bytes, 0, 4);
    System.arraycopy(lbs, 0, bytes, 4, 4);
    final ByteBuffer buffer = ByteBuffer.allocate(8).put(bytes, 0, 8);
    buffer.flip();
    return buffer.getLong();
}

From source file:org.apache.airavata.gfac.core.GFacUtils.java

public static long bytesToLong(byte[] bytes) {
    ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
    buffer.put(bytes);/* ww w . ja  v a 2s . c  o  m*/
    buffer.flip();//need flip
    return buffer.getLong();
}

From source file:org.apache.tez.test.TestOutput.java

@Override
public List<Event> close() throws Exception {
    LOG.info("Sending data movement event with value: " + output);
    ByteBuffer result = ByteBuffer.allocate(4).putInt(output);
    result.flip();
    List<Event> events = Lists.newArrayListWithCapacity(getNumPhysicalOutputs());
    for (int i = 0; i < getNumPhysicalOutputs(); i++) {
        DataMovementEvent event = DataMovementEvent.create(i, result);
        events.add(event);/*from   ww w .j a  va 2  s  .c o m*/
    }
    return events;
}

From source file:MainClass.java

public void run() {
    try {//  w w w  . jav  a  2  s.  co m
        ByteBuffer buffer = ByteBuffer.allocate(4);
        buffer.putInt(this.howMany);
        buffer.flip();
        while (buffer.hasRemaining())
            out.write(buffer);

        for (int i = 0; i < howMany; i++) {
            byte[] data = new BigInteger(Integer.toString(i)).toByteArray();
            buffer = ByteBuffer.allocate(4 + data.length);

            buffer.putInt(data.length);
            buffer.put(data);
            buffer.flip();

            while (buffer.hasRemaining())
                out.write(buffer);
        }
        out.close();
        System.err.println("Closed");
    } catch (IOException ex) {
        System.err.println(ex);
    }
}

From source file:com.openteach.diamond.network.waverider.command.MasterGreetCommandHandler.java

private Command makeGreetCommand(Session session) {
    String hello = new StringBuilder("Hello slave:").append(session.getSlaveWorker().getIp()).toString();
    ByteBuffer buffer = ByteBuffer.allocate(hello.getBytes().length);
    buffer.put(hello.getBytes());/* w w w .  j  a  v a  2  s .  c  om*/
    buffer.flip();

    Command command = new Command(1L, buffer);

    return command;
}

From source file:com.jim.im.broker.config.ImBrokerMessageListener.java

private PublishMessage createPublishMessage(ImMessage imMessage) throws UnsupportedEncodingException {
    PublishMessage publishMessage = new PublishMessage();
    publishMessage.setTopicName(imMessage.getTopicName());
    publishMessage.setQos(AbstractMessage.QOSType.MOST_ONE);
    ByteBuffer messageId = ByteBuffer.wrap(imMessage.getId().toString().getBytes());
    messageId.flip();
    publishMessage.setPayload(messageId);
    return publishMessage;
}

From source file:RegexProperties.java

public void load(FileInputStream inStream) throws IOException, PatternSyntaxException {
    FileChannel fc = inStream.getChannel();

    ByteBuffer bb = ByteBuffer.allocate((int) fc.size());
    fc.read(bb);//from   ww  w .  j  ava2s.co  m
    bb.flip();
    String fileContent = new String(bb.array());

    Pattern pattern = Pattern.compile("^(.*)$", Pattern.MULTILINE);
    Matcher matcher = pattern.matcher(fileContent);

    while (matcher.find()) {
        String line = matcher.group(1);
        if (line != null && !"".equals(line.trim()) && !line.startsWith("#") && !line.startsWith("!")) {
            String keyValue[] = null;
            if (line.indexOf("=") > 0)
                keyValue = line.split("=", 2);
            else
                keyValue = line.split(":", 2);

            if (keyValue != null) {
                super.put(keyValue[0].trim(), keyValue[1]);
            }
        }
    }
    fc = null;
    bb = null;
}

From source file:com.gamesalutes.utils.ByteUtils.java

/**
 * Reads all the bytes from the given input stream and stores them in the specified buffer.
 * If the input buffer is <code>null</code> or does not have the capacity to store all the input, a 
 * new buffer is created and returned.  The input stream is closed regardless of whether an
 * <code>IOException</code> is thrown.
 * /*from ww w.  j  av a2  s. c om*/
 * 
 * @param in the <code>InputStream</code> to read
 * @param buf a <code>ByteBuffer</code> to use for storage or <code>null</code> to just allocate a new one
 *        If <code>buf</code> is not large enough it will be expanded using {@link #growBuffer(ByteBuffer, int)}
 * @return the buffer containing the read data
 * @throws IOException
 */
public static ByteBuffer readBytes(InputStream in, ByteBuffer buf) throws IOException {
    try {
        if (buf == null)
            buf = ByteBuffer.allocate(READ_BUFFER_SIZE);

        // note the input position
        int startPos = buf.position();

        byte[] tmp = new byte[NETWORK_BYTE_SIZE];
        int read;
        // read until end of file
        while ((read = in.read(tmp)) > 0) {
            if (buf.remaining() < read) {
                buf = ByteUtils.growBuffer(buf, buf.limit() + (read - buf.remaining()));
            }
            buf.put(tmp, 0, read);
        }

        buf.flip();
        // reset starting position to be that of input buffer
        buf.position(startPos);
        return buf;
    } finally {
        MiscUtils.closeStream(in);
    }

}

From source file:byps.BWire.java

/**
 * Reads a ByteBuffer from an InputStream
 * Closes the InputStream.//from w  w w  .  j a  va  2s . c  o m
 * @param is
 * @return
 * @throws IOException
 */
public static ByteBuffer bufferFromStream(InputStream is, Boolean gzip) throws IOException {
    if (is == null)
        return null;
    try {
        ByteBuffer ibuf = ByteBuffer.allocate(10 * 1000);

        if (gzip != null) {
            if (gzip) {
                is = new GZIPInputStream(is);
            }
        } else {
            if (!is.markSupported())
                is = new BufferedInputStream(is, 2);
            is.mark(2);
            int magic = is.read() | (is.read() << 8);
            is.reset();
            if (magic == GZIPInputStream.GZIP_MAGIC) {
                is = new GZIPInputStream(is);
            }
        }

        ReadableByteChannel rch = Channels.newChannel(is);
        while (rch.read(ibuf) != -1) {
            if (ibuf.remaining() == 0) {
                ByteBuffer nbuf = ByteBuffer.allocate(ibuf.capacity() * 2);
                ibuf.flip();
                nbuf.put(ibuf);
                ibuf = nbuf;
            }
        }

        ibuf.flip();
        return ibuf;
    } finally {
        is.close();
    }
}

From source file:idgs.client.SocketChannelHandler.java

/**
 * handle connect/*  w  w  w. j  a va2  s.  c  om*/
 * @throws IOException
 */
public void onConnected(SocketChannel channel) throws IOException {
    ClientLogin login = new ClientLogin();
    ByteBuffer buffer = login.toBuffer();
    buffer.flip();
    int writeClientLoginSize = channel.write(buffer);
    if (writeClientLoginSize > 0) {
        log.debug("writer client login content: " + new String(login.toString()));
        log.debug("byte size: " + writeClientLoginSize + ", order by " + RpcBuffer.DEFAULT_BYTE_ORDER.toString()
                + " bytes: " + Arrays.toString(buffer.array()));
    }
}