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:org.lable.rfc3881.auditlogger.adapter.hbase.HBaseAdapter.java

static byte[] columnQualifierSuffixFor(Identifiable identifiable) {
    List<String> parts = identifiable.identifyingStack();
    // Account for the separator bytes.
    int targetLength = parts.size() - 1;
    for (String part : parts) {
        if (part != null) {
            targetLength += part.length();
        }/*  w  ww  .ja v  a 2s .  com*/
    }

    ByteBuffer buffer = ByteBuffer.allocate(targetLength);
    boolean first = true;
    for (String part : parts) {
        if (!first) {
            buffer.put(NULL_BYTE);
        } else {
            first = false;
        }

        if (part != null) {
            buffer.put(toBytes(part));
        }
    }

    return buffer.array();
}

From source file:com.rogoman.easyauth.Authenticator.java

/**
 * Generates a verification code based on the passed secret and a challenge value.
 *
 * @param secret         passed secret key
 * @param challengeValue passed challenge value
 * @return generated code/*from  ww  w. j av  a  2  s .  c  o  m*/
 * @exception java.security.InvalidKeyException if the secret passed has an invalid format
 * @exception com.rogoman.easyauth.AuthenticatorException if there is another problem in computing the code value
 */
protected String getCodeInternal(final String secret, final long challengeValue)
        throws InvalidKeyException, AuthenticatorException {
    long chlg = challengeValue;

    byte[] challenge = ByteBuffer.allocate(8).putLong(challengeValue).array();

    byte[] key = Base32Encoding.toBytes(secret);
    for (int i = secret.length(); i < key.length; i++) {
        key[i] = 0;
    }

    byte[] hash;
    try {
        hash = HMAC.hmacDigest(challenge, key, CRYPTO_ALGORITHM);
    } catch (final NoSuchAlgorithmException e) {
        throw new AuthenticatorException("HmacSHA1 algorithm is not present in your JVM.", e);
    }

    int offset = hash[hash.length - 1] & 0xf;

    long truncatedHash = 0;
    for (int j = 0; j < 4; j++) {
        truncatedHash <<= 8;
        int absValue = (int) hash[offset + j] & 0xFF;
        truncatedHash |= absValue;
    }

    truncatedHash &= 0x7FFFFFFF;
    truncatedHash %= 1000000;

    String code = Long.toString(truncatedHash);
    return StringUtils.leftPad(code, 6, '0');
}

From source file:com.byteatebit.nbecho.perfclient.NbEchoPerfClient.java

@Override
public void accept(INbContext nbContext, SocketChannel socketChannel) {
    boolean connectionFinished = false;
    int taskId = createTaskId();
    try {//from ww w  .j  a  v  a2 s .com
        connectionFinished = socketChannel.finishConnect();
    } catch (IOException e) {
        LOG.error("Could not complete socket connection.", e);
    }
    if (!connectionFinished) {
        LOG.error("Could not complete socket connection.  Closing socket channel");
        IOUtils.closeQuietly(socketChannel);
        countDownLatch.countDown();
        return;
    }
    WriteMessageTask writeMessageTask = WriteMessageTask.Builder.builder()
            .withByteBuffer(ByteBuffer.allocate(1024)).build();
    ReadDelimitedMessageTask readMessageTask = ReadDelimitedMessageTask.Builder.builder()
            .withByteBuffer(ByteBuffer.allocate(1024)).withDelimiter(MESSAGE_DELIMITER).build();
    clientTask(nbContext, socketChannel, readMessageTask, writeMessageTask, numRequests, taskId);
}

From source file:com.l2jfree.network.mmocore.ReadWriteThread.java

public ReadWriteThread(MMOController<T, RP, SP> mmoController, MMOConfig config,
        PacketHandler<T, RP, SP> packetHandler) throws IOException {
    super(mmoController, config);

    _bufferSize = config.getBufferSize();
    _helperBufferCount = config.getHelperBufferCount();
    _maxOutgoingPacketsPerPass = config.getMaxOutgoingPacketsPerPass();
    _maxIncomingPacketsPerPass = config.getMaxIncomingPacketsPerPass();
    _maxOutgoingBytesPerPass = config.getMaxOutgoingBytesPerPass();
    _maxIncomingBytesPerPass = config.getMaxIncomingBytesPerPass();
    _byteOrder = config.getByteOrder();//from  w w w .ja v a 2 s . c o  m

    _directWriteBuffer = ByteBuffer.allocateDirect(getBufferSize()).order(getByteOrder());
    _writeBuffer = ByteBuffer.allocate(getBufferSize()).order(getByteOrder());
    _readBuffer = ByteBuffer.allocate(getBufferSize()).order(getByteOrder());

    _bufferPool = new ArrayDeque<ByteBuffer>(getHelperBufferCount());
    for (int i = 0; i < getHelperBufferCount(); i++)
        getFreeBuffers().addLast(ByteBuffer.allocate(getBufferSize()).order(getByteOrder()));
    _mmoBuffer = new MMOBuffer();
    _dataSizeHolder = new DataSizeHolder();

    _packetHandler = packetHandler;
    _pendingClose = FastList.newInstance();
}

From source file:byps.BWire.java

/**
 * Reads a ByteBuffer from an InputStream
 * Closes the InputStream./*from  ww w .  ja v a2s  .  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:de.undercouch.bson4jackson.io.StaticBuffers.java

/**
 * @see #charBuffer(Key, int)//from ww w  .  j a  va  2s  . c  o  m
 */
public ByteBuffer byteBuffer(Key key, int minSize) {
    minSize = Math.max(minSize, GLOBAL_MIN_SIZE);

    ByteBuffer r = _byteBuffers[key.ordinal()];
    if (r == null || r.capacity() < minSize) {
        r = ByteBuffer.allocate(minSize);
    } else {
        _byteBuffers[key.ordinal()] = null;
        r.clear();
    }
    return r;
}

From source file:io.dstream.hadoop.TypeAwareWritable.java

/**
 * NOTE: The below code is temporary and both conversion and ser/deser will be exposed through externally 
 * configurable framework!//from  w w w .  j  ava 2 s .c om
 * 
 * @param value
 * @return
 */
private void determineValueType(Object value) {
    if (value instanceof Integer) {
        this.valueEncoder.valueType = INTEGER;
        this.valueEncoder.valueBytes = ByteBuffer.allocate(4).putInt((Integer) value).array();
    } else if (value instanceof Long) {
        this.valueEncoder.valueType = LONG;
        this.valueEncoder.valueBytes = ByteBuffer.allocate(8).putLong((Long) value).array();
    } else if (value == null) {
        this.valueEncoder.valueType = NULL;
    } else {
        ObjectOutputStream oos = null;
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            oos = new ObjectOutputStream(bos);
            oos.writeObject(value);
            this.valueEncoder.valueType = OBJECT;
            this.valueEncoder.valueBytes = bos.toByteArray();
        } catch (Exception e) {
            throw new IllegalStateException("Failed to serialize value: " + value, e);
        } finally {
            try {
                if (oos != null) {
                    oos.close();
                }
            } catch (Exception e2) {
                /*ignore*/}
        }
    }
}

From source file:tachyon.master.RawTables.java

/**
 * Get the metadata of the specified raw table. It will return a duplication.
 *
 * @param tableId The id of the raw table
 * @return null if it has no metadata, or a duplication of the metadata
 *//*from  w w w.  j a va 2 s  .c o m*/
public synchronized ByteBuffer getMetadata(int tableId) {
    Pair<Integer, ByteBuffer> data = mData.get(tableId);

    if (null == data) {
        return null;
    }

    ByteBuffer ret = ByteBuffer.allocate(data.getSecond().capacity());
    ret.put(data.getSecond().array());
    ret.flip();

    return ret;
}

From source file:com.cate.javatransmitter.FileHandler.java

public void setFile(Path inputPath) {
    //TODO add file selection
    this.inputPath = inputPath;
    try {//from  w w w . jav a  2 s.  co m
        this.sbc = Files.newByteChannel(inputPath, StandardOpenOption.READ);
        this.nofChunks = (int) Math.ceil((double) (sbc.size()) / packetSize);
        System.out.println("File Size = " + sbc.size() + " Bytes");
        System.out.println("File Size = " + sbc.size() + " Bytes");
    } catch (IOException ex) {
        Logger.getLogger(FileHandler.class.getName()).log(Level.SEVERE, null, ex);
        System.exit(0);
    }
    this.chunkCounter = 0;
    buf = ByteBuffer.allocate(packetSize);

    //catch (IOException x) {
    //    System.out.println("caught exception: " + x);        
    //        return null;
    //    }        
    //            
}

From source file:gobblin.tunnel.TestTunnelWithArbitraryTCPTraffic.java

private static String readFromSocket(SocketChannel client) throws IOException {
    ByteBuffer readBuf = ByteBuffer.allocate(256);
    LOG.info("Reading from client");
    client.read(readBuf);//from  www . j a v a2 s .c o m
    readBuf.flip();
    return StandardCharsets.US_ASCII.decode(readBuf).toString();
}