Example usage for java.nio ByteBuffer position

Introduction

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

Prototype

public final int position() 

Source Link

Document

Returns the position of this buffer.

Usage

From source file:com.linkedin.databus.core.DbusEventV1.java

private static int serializeStringKeyEvent(byte[] key, ByteBuffer serializationBuffer,
        DbusEventInfo eventInfo) {/*from  www . jav  a  2  s .c o  m*/
    ByteBuffer valueBuffer = eventInfo.getValueByteBuffer();
    int payloadLen = (valueBuffer == null) ? eventInfo.getValueLength() : valueBuffer.remaining();

    int startPosition = serializationBuffer.position();
    byte[] attributes = null;

    // Event without explicit opcode specified should always be considered UPSERT or existing code will break
    if (eventInfo.getOpCode() == DbusOpcode.DELETE) {
        if (serializationBuffer.order() == ByteOrder.BIG_ENDIAN)
            attributes = DeleteStringKeyAttributesBigEndian.clone();
        else
            attributes = DeleteStringKeyAttributesLittleEndian.clone();
    } else {
        if (serializationBuffer.order() == ByteOrder.BIG_ENDIAN)
            attributes = UpsertStringKeyAttributesBigEndian.clone();
        else
            attributes = UpsertStringKeyAttributesLittleEndian.clone();
    }

    if (eventInfo.isEnableTracing()) {
        setTraceFlag(attributes, serializationBuffer.order());
    }

    if (eventInfo.isReplicated())
        setExtReplicationFlag(attributes, serializationBuffer.order());

    serializationBuffer.put(DbusEventFactory.DBUS_EVENT_V1).putInt(HeaderCrcDefault)
            .putInt(StringValueOffset(key.length) + payloadLen).put(attributes)
            .putLong(eventInfo.getSequenceId()).putShort(eventInfo.getpPartitionId())
            .putShort(eventInfo.getlPartitionId()).putLong(eventInfo.getTimeStampInNanos())
            .putShort(eventInfo.getSrcId()).put(eventInfo.getSchemaId(), 0, 16).putInt(HeaderCrcDefault)
            .putInt(key.length).put(key);
    if (valueBuffer != null) {
        // note. put will advance position. In the case of wrapped byte[] it is ok, in the case of
        // ByteBuffer this is actually a read only copy of the buffer passed in.
        serializationBuffer.put(valueBuffer);
    }

    int stopPosition = serializationBuffer.position();
    long valueCrc = ByteBufferCRC32.getChecksum(serializationBuffer, startPosition + StringKeyOffset,
            key.length + payloadLen);
    Utils.putUnsignedInt(serializationBuffer, startPosition + ValueCrcOffset, valueCrc);
    if (eventInfo.isAutocommit()) {
        //TODO (DDSDBUS-61): Medium : can avoid new here
        DbusEventV1 e = new DbusEventV1(serializationBuffer, startPosition);
        e.applyCrc();
    }

    serializationBuffer.position(stopPosition);
    return (stopPosition - startPosition);
}

---

From source file:com.buaa.cfs.nfs3.OpenFileCtx.java

@VisibleForTesting
public static void alterWriteRequest(WRITE3Request request, long cachedOffset) {
    long offset = request.getOffset();
    int count = request.getCount();
    long smallerCount = offset + count - cachedOffset;
    if (LOG.isDebugEnabled()) {
        LOG.debug(String.format(/* ww w  . j a  va2  s  . c o  m*/
                "Got overwrite with appended data (%d-%d)," + " current offset %d,"
                        + " drop the overlapped section (%d-%d)" + " and append new data (%d-%d).",
                offset, (offset + count - 1), cachedOffset, offset, (cachedOffset - 1), cachedOffset,
                (offset + count - 1)));
    }

    ByteBuffer data = request.getData();
    Preconditions.checkState(data.position() == 0, "The write request data has non-zero position");
    data.position((int) (cachedOffset - offset));
    Preconditions.checkState(data.limit() - data.position() == smallerCount,
            "The write request buffer has wrong limit/position regarding count");

    request.setOffset(cachedOffset);
    request.setCount((int) smallerCount);
}

---

From source file:net.phoenix.thrift.hello.ThreadedSelectorTest.java

@Test
public void testByteBuffer() throws TException, IOException, InterruptedException {
    LOG.info("Client starting....");
    String name = "World";
    // TTransport transport = new TNonblockingSocket("localhost", 9804);
    TTransport transport = new TFramedTransport(new TSocket("localhost", 9804));
    transport.open();/*w w  w  .  j  av a 2 s  .c o  m*/
    // TTransport transport = new TTransport(socket);
    TProtocol protocol = new TBinaryProtocol(transport);
    HelloService.Client client = new HelloService.Client(protocol);
    try {
        Hello.HelloRequest.Builder request = Hello.HelloRequest.newBuilder();
        request.setName(name);
        Hello.User.Builder user = Hello.User.newBuilder();
        user.setName("hello");
        user.setPassword("hello");
        request.setUser(user.build());
        ByteBuffer requestBuffer = ByteBuffer.wrap(request.build().toByteArray());
        ByteBuffer buffer = client.hello(requestBuffer);
        Hello.HelloResponse response = Hello.HelloResponse
                .parseFrom(ArrayUtils.subarray(buffer.array(), buffer.position(), buffer.limit()));
        String message = response.getMessage();
        assertEquals(message, "Hello " + name);
        // System.out.println(message);
    } finally {
        transport.close();
    }
}

---

From source file:byps.test.servlet.MyRemoteStreams.java

@Override
public TreeMap<Integer, InputStream> getImages() throws RemoteException {
    if (log.isDebugEnabled())
        log.debug("getImages(");
    Map<Integer, ByteBuffer> mapStreamBytes = this.mapStreamBytes;
    if (mapStreamBytes == null)
        return null;
    TreeMap<Integer, InputStream> map = new TreeMap<Integer, InputStream>();
    for (Integer k : mapStreamBytes.keySet()) {
        ByteBuffer buf = mapStreamBytes.get(k);
        InputStream istrm = new ByteArrayInputStream(buf.array(), buf.position(), buf.remaining());
        map.put(k, istrm);/*from  www  .j  a v  a 2 s .  co m*/
    }
    if (log.isDebugEnabled())
        log.debug(")getImages=" + map);
    return map;
}

---

From source file:net.sf.jinsim.UDPChannel.java

@Override
protected synchronized int receive(ByteBuffer buffer) throws IOException {

    if (cacheBuffer.position() > 0 && cacheBuffer.hasRemaining()) {
        buffer.put(cacheBuffer);/*ww w  .  j a  v a2  s.co m*/
        return buffer.position();
    } else {
        byte[] data = new byte[buffer.limit()];
        cacheBuffer.clear();
        SocketAddress address = datagramChannel.receive(cacheBuffer);
        int size = cacheBuffer.position();
        if (address != null) {
            cacheBuffer.flip();
            int remaining = cacheBuffer.remaining();
            if (remaining > data.length) {
                remaining = data.length;
            }
            cacheBuffer.get(data, 0, remaining);
            buffer.put(data, 0, remaining);
            return data.length;
        }
        return size;
    }
    /*
    SocketAddress address = datagramChannel.receive(buffer);
    if (address != null) {
       System.out.println("has data: " + buffer.position());
       return buffer.position();
    }
    return 0;
    */
    /*
    DatagramSocket socket = datagramChannel.socket();
            
    receive(DatagramPacket p) 
    */
}

---

From source file:de.hofuniversity.iisys.neo4j.websock.query.encoding.safe.TSafeDeflateJsonQueryHandler.java

private ByteBuffer fuse(List<byte[]> buffers, final int length) {
    //fuses the buffers into a single array of the target length
    final ByteBuffer bb = ByteBuffer.allocate(length);

    for (byte[] buffer : buffers) {
        if (buffer.length > length - bb.position()) {
            bb.put(buffer, 0, length - bb.position());
        } else {/*  w  w  w.  java2  s . c  om*/
            bb.put(buffer);
        }
    }

    //important
    bb.flip();

    return bb;
}

---

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

@Test
public void testWriteCompleteMessage() throws IOException {
    SocketChannel socket = mock(SocketChannel.class);
    ByteArrayOutputStream messageStream = new ByteArrayOutputStream();
    String message = "hi\n";
    when(socket.write(any(ByteBuffer.class))).then(new Answer<Integer>() {
        @Override//from   w  w  w  .  ja v a2 s  .c o m
        public Integer answer(InvocationOnMock invocationOnMock) throws Throwable {
            ByteBuffer buffer = (ByteBuffer) invocationOnMock.getArguments()[0];
            while (buffer.hasRemaining())
                messageStream.write(buffer.get());
            return buffer.position();
        }
    });
    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());
    writeTask.write(selectionKey, callback, exceptionHandler);
    verify(selectionKey, times(1)).interestOps(0);

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

---

From source file:com.healthmarketscience.jackcess.impl.CompoundOleUtil.java

/**
 * Creates a nes CompoundContent for the given blob information.
 *//* www  .jav  a 2 s  . c o  m*/
public ContentImpl createCompoundPackageContent(OleBlobImpl blob, String prettyName, String className,
        String typeName, ByteBuffer blobBb, int dataBlockLen) {
    return new CompoundContentImpl(blob, prettyName, className, typeName, blobBb.position(), dataBlockLen);
}

---

From source file:edu.tsinghua.lumaqq.qq.packets.PacketHelper.java

/**
* ByteBuffer??InPacket?buf???limit/*from   w  w w .j ava  2s.  c o  m*/
* ????bufpositionlength?
* 
 * @param buf
 * @param length
 * @param debug
 * @return
 * @throws PacketParseException
 */
private OutPacket parseOut(ByteBuffer buf, int length, QQUser user) throws PacketParseException {
    int pos = buf.position();
    try {
        OutPacket ret = parser.parseOutcoming(buf, length, user);
        return ret;
    } catch (PacketParseException e) {
        throw e;
    } finally {
        buf.position(pos + length);
        parser = null;
    }
}

---

From source file:de.hofuniversity.iisys.neo4j.websock.query.encoding.unsafe.DeflateJsonQueryHandler.java

private ByteBuffer fuse(final int length) {
    //fuses the buffers into a single array of the target length
    final ByteBuffer bb = ByteBuffer.allocate(length);

    for (byte[] buffer : fBuffers) {
        if (buffer.length > length - bb.position()) {
            bb.put(buffer, 0, length - bb.position());
        } else {//www  .  j  a va  2 s.com
            bb.put(buffer);
        }
    }

    //important
    bb.flip();
    fBuffers.clear();

    return bb;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• »