Example usage for java.nio ByteBuffer get

Introduction

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

Prototype

public abstract byte get();

Source Link

Document

Returns the byte at the current position and increases the position by 1.

Usage

From source file:rx.apache.http.consumers.ResponseConsumerEventStream.java

@Override
protected void onByteReceived(ByteBuffer buf, IOControl ioctrl) throws IOException {
    if (parentSubscription.isUnsubscribed()) {
        ioctrl.shutdown();//from  w w w  . j  av  a  2s  . c  om
    }
    while (buf.position() < buf.limit()) {
        byte b = buf.get();
        if (b == 10 || b == 13) {
            if (dataBuffer.hasContent()) {
                contentSubject.onNext(dataBuffer.getBytes());
            }
            dataBuffer.reset();
        } else {
            dataBuffer.addByte(b);
        }
    }
}

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From source file:com.btoddb.trellis.common.serialization.JavaSerializer.java

@Override
public Serializable deserialize(final ByteBuffer bb) {
    try {//w w w  . j a v  a2 s  .co m
        ObjectInputStream ois;
        ois = new ObjectInputStream(new InputStream() {
            @Override
            public int read() throws IOException {
                return bb.get();
            }
        });
        Object obj = ois.readObject();
        return (Serializable) obj;
    } catch (IOException e) {
        throw new TrellisException("exception while deserializing Java Serializable object", e);
    } catch (ClassNotFoundException e) {
        throw new TrellisException("exception while deserializing Java Serializable object", e);
    }
}

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From source file:edu.umass.cs.gigapaxos.paxospackets.PValuePacket.java

protected PValuePacket(ByteBuffer bbuf) throws UnsupportedEncodingException, UnknownHostException {
    super(bbuf);/*from   w w w  . java  2s  .c o  m*/
    this.ballot = new Ballot(bbuf.getInt(), bbuf.getInt());
    this.recovery = bbuf.get() == (byte) 1;
    this.medianCheckpointedSlot = bbuf.getInt();
    this.noCoalesce = bbuf.get() == (byte) 1;
}

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From source file:com.streamsets.pipeline.lib.util.AvroSchemaHelper.java

/**
 * Checks for a magic byte in the data and if present extracts the schemaId
 * @param data byte array representing a kafka message
 * @return parsed schema ID//from www. j  a v  a 2 s .  co m
 */
public Optional<Integer> detectSchemaId(byte[] data) {
    if (data.length < 5) {
        return Optional.empty();
    }

    ByteBuffer wrapped = ByteBuffer.wrap(data);
    // 5 == MAGIC_BYTE + ID_SIZE
    if (wrapped.get() != MAGIC_BYTE) {
        return Optional.empty();
    }

    return Optional.of(wrapped.getInt());
}

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From source file:net.jenet.Packet.java

/**
 * Copies part of the given buffer into this packet's data.
 * @param buffer// ww w .  j  a v  a 2 s. c  o m
 *              Buffer to copy from
 * @param fragmentOffset
 *              Position of the first byte to copy
 * @param length
 *              Total number of bytes to copy
 */
public void fromBuffer(ByteBuffer buffer, int fragmentOffset, int length) {
    data.position(fragmentOffset);
    for (int i = 0; i < length; i++) {
        data.put(buffer.get());
    }
    data.position(dataLength);
    data.limit(dataLength);
}

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From source file:com.dianping.puma.parser.mysql.event.TableMapEvent.java

@Override
public void doParse(ByteBuffer buf, PumaContext context) throws IOException {
    tableId = PacketUtils.readLong(buf, 6);
    reserved = PacketUtils.readInt(buf, 2);
    databaseNameLength = buf.get();
    databaseName = PacketUtils.readNullTerminatedString(buf);
    tableNameLength = buf.get();//from w  w w.j  a  v a 2  s.co  m
    tableName = PacketUtils.readNullTerminatedString(buf);
    columnCount = PacketUtils.readLengthCodedUnsignedLong(buf);
    columnTypes = PacketUtils.readBytes(buf, columnCount.intValue());
    columnMetadataCount = PacketUtils.readLengthCodedUnsignedLong(buf);

    columnMetadata = Metadata.valueOf(columnTypes, PacketUtils.readBytes(buf, columnMetadataCount.intValue()));
    columnNullabilities = PacketUtils.readBitSet(buf, columnCount.intValue());

    context.getTableMaps().put(tableId, this);
}

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From source file:com.byteatebit.nbserver.task.TestWriteMessageTask.java

@Test
public void testWriteMessageInParts() throws IOException {
    SocketChannel socket = mock(SocketChannel.class);
    ByteArrayOutputStream messageStream = new ByteArrayOutputStream();
    String messagePart1 = "messagePart1 ";
    String messagePart2 = "messagePart2";
    String message = messagePart1 + messagePart2;
    when(socket.write(any(ByteBuffer.class))).then(new Answer<Integer>() {
        @Override//  w ww .  j  a v  a  2 s  .  co  m
        public Integer answer(InvocationOnMock invocationOnMock) throws Throwable {
            ByteBuffer buffer = (ByteBuffer) invocationOnMock.getArguments()[0];
            for (int i = 0; i < messagePart1.length(); i++)
                messageStream.write(buffer.get());
            return messagePart1.length();
        }
    }).then(new Answer<Integer>() {
        @Override
        public Integer answer(InvocationOnMock invocationOnMock) throws Throwable {
            ByteBuffer buffer = (ByteBuffer) invocationOnMock.getArguments()[0];
            for (int i = 0; i < messagePart2.length(); i++)
                messageStream.write(buffer.get());
            return messagePart2.length();
        }
    });
    INbContext nbContext = mock(INbContext.class);
    SelectionKey selectionKey = mock(SelectionKey.class);
    when(selectionKey.channel()).thenReturn(socket);
    when(selectionKey.isValid()).thenReturn(true);
    when(selectionKey.readyOps()).thenReturn(SelectionKey.OP_WRITE);

    WriteMessageTask writeTask = WriteMessageTask.Builder.builder().withByteBuffer(ByteBuffer.allocate(100))
            .build();
    List<String> callbackInvoked = new ArrayList<>();
    Runnable callback = () -> callbackInvoked.add("");
    Consumer<Exception> exceptionHandler = e -> Assert.fail(e.getMessage());
    writeTask.writeMessage(message.getBytes(StandardCharsets.UTF_8), nbContext, socket, callback,
            exceptionHandler);
    verify(nbContext, times(1)).register(any(SocketChannel.class), eq(SelectionKey.OP_WRITE), any(), any());
    // simulate first write
    writeTask.write(selectionKey, callback, exceptionHandler);
    verify(selectionKey, times(0)).interestOps(0);
    // simulate second write
    writeTask.write(selectionKey, callback, exceptionHandler);
    verify(selectionKey, times(1)).interestOps(0);

    Assert.assertEquals(message, messageStream.toString(StandardCharsets.UTF_8));
    Assert.assertEquals(1, callbackInvoked.size());
}

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From source file:com.hortonworks.registries.schemaregistry.serdes.avro.AvroSnapshotDeserializer.java

protected SchemaIdVersion retrieveSchemaIdVersion(InputStream payloadInputStream) throws SerDesException {
    // it can be enhanced to have respective protocol handlers for different versions
    // first byte is protocol version/id.
    // protocol format:
    // 1 byte  : protocol version
    // 8 bytes : schema metadata Id
    // 4 bytes : schema version
    ByteBuffer byteBuffer = ByteBuffer.allocate(13);
    try {/*from  www. j a  v  a  2s  .  co m*/
        payloadInputStream.read(byteBuffer.array());
    } catch (IOException e) {
        throw new SerDesException(e);
    }

    byte protocolId = byteBuffer.get();
    if (protocolId != AvroSchemaProvider.CURRENT_PROTOCOL_VERSION) {
        throw new SerDesException(
                "Unknown protocol id [" + protocolId + "] received while deserializing the payload");
    }
    long schemaMetadataId = byteBuffer.getLong();
    int schemaVersion = byteBuffer.getInt();

    return new SchemaIdVersion(schemaMetadataId, schemaVersion);
}

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From source file:io.warp10.continuum.gts.GTSDecoder.java

public static GTSDecoder fromBlock(byte[] block, byte[] key) throws IOException {

    if (block.length < 6) {
        throw new IOException("Invalid block.");
    }//from   w w  w .j a va2 s.  c  o  m

    ByteBuffer buffer = ByteBuffer.wrap(block);

    //
    // Extract size
    //

    buffer.order(ByteOrder.BIG_ENDIAN);
    int size = buffer.getInt();

    // Check size

    if (block.length != size) {
        throw new IOException("Invalid block size, expected " + size + ", block is " + block.length);
    }

    // Extract compression

    byte comp = buffer.get();

    boolean compress = false;

    if (0 == comp) {
        compress = false;
    } else if (1 == comp) {
        compress = true;
    } else {
        throw new IOException("Invalid compression flag");
    }

    // Extract base timestamp

    long base = Varint.decodeSignedLong(buffer);

    InputStream in;

    ByteArrayInputStream bain = new ByteArrayInputStream(block, buffer.position(), buffer.remaining());

    if (compress) {
        in = new GZIPInputStream(bain);
    } else {
        in = bain;
    }

    byte[] buf = new byte[1024];

    ByteArrayOutputStream out = new ByteArrayOutputStream(buffer.remaining());

    while (true) {
        int len = in.read(buf);

        if (len <= 0) {
            break;
        }
        out.write(buf, 0, len);
    }

    GTSDecoder decoder = new GTSDecoder(base, key, ByteBuffer.wrap(out.toByteArray()));

    return decoder;
}

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From source file:com.kylinolap.common.hll.HyperLogLogPlusCounter.java

public void readRegisters(ByteBuffer in) throws IOException {
    byte scheme = in.get();
    if ((scheme & COMPRESSION_FLAG) > 0) {
        scheme ^= COMPRESSION_FLAG;/*from ww  w .j  av  a 2s . c  om*/
        int compressedLen = BytesUtil.readVInt(in);
        int end = in.position() + compressedLen;
        byte[] decompressed = DEFAULT_COMPRESSOR.decompress(in, in.position(), compressedLen);
        in.position(end);
        in = ByteBuffer.wrap(decompressed);
    }

    if (scheme == 0) { // map scheme
        clear();
        int size = BytesUtil.readVInt(in);
        if (size > m)
            throw new IllegalArgumentException(
                    "register size (" + size + ") cannot be larger than m (" + m + ")");
        int indexLen = getRegisterIndexSize();
        for (int i = 0; i < size; i++) {
            int key = BytesUtil.readUnsigned(in, indexLen);
            registers[key] = in.get();
        }
    } else { // array scheme
        for (int i = 0; i < m; i++) {
            registers[i] = in.get();
        }
    }
}

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