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.taobao.tair.comm.TairClient.java

public void invokeAsync(final BasePacket packet, final long timeout, ResponseListener listener) {
    if (isDebugEnabled) {
        LOGGER.debug("send request [" + packet.getChid() + "] async,time is:" + System.currentTimeMillis());
    }//from   w w w .j a  v a  2  s  .c  o m
    if (minTimeout > timeout) {
        minTimeout = timeout;
    }
    final ResponseCallbackTask callbackTask = new ResponseCallbackTask(packet.getChid(), listener, this.session,
            timeout);
    callbackTasks.put(packet.getChid(), callbackTask);

    ByteBuffer bb = packet.getByteBuffer();
    bb.flip();
    byte[] data = new byte[bb.remaining()];
    bb.get(data);
    WriteFuture writeFuture = session.write(data);
    writeFuture.addListener(new IoFutureListener() {

        public void operationComplete(IoFuture future) {
            WriteFuture wfuture = (WriteFuture) future;
            if (wfuture.isWritten()) {
                return;
            }
            String error = "send message to tair server error [" + packet.getChid() + "], tair server: "
                    + session.getRemoteAddress() + ", maybe because this connection closed :"
                    + !session.isConnected();
            LOGGER.warn(error);
            callbackTask.setResponse(new TairClientException(error));

            // close this session
            if (session.isConnected())
                session.close();
            else
                clientFactory.removeClient(key);
        }

    });
}

---

From source file:com.streamsets.pipeline.lib.generator.wholefile.WholeFileDataGenerator.java

@Override
public void write(Record record) throws IOException, DataGeneratorException {
    validateRecord(record);/* w w w .ja  v  a  2  s. c om*/
    FileRef fileRef = record.get(FileRefUtil.FILE_REF_FIELD_PATH).getValueAsFileRef();
    int bufferSize = fileRef.getBufferSize();
    boolean canUseDirectByteBuffer = fileRef.getSupportedStreamClasses().contains(ReadableByteChannel.class);
    if (canUseDirectByteBuffer) {
        //Don't have to close this here, because generate.close will call output stream close
        WritableByteChannel writableByteChannel = Channels.newChannel(outputStream); //NOSONAR
        try (ReadableByteChannel readableByteChannel = getReadableStream(fileRef, ReadableByteChannel.class)) {
            ByteBuffer buffer = ByteBuffer.allocateDirect(bufferSize);
            while ((readableByteChannel.read(buffer)) > 0) {
                //Flip to use the buffer from 0 to position.
                buffer.flip();
                while (buffer.hasRemaining()) {
                    writableByteChannel.write(buffer);
                }
                //Compact the buffer for reuse.
                buffer.clear();
            }
        }
    } else {
        byte[] b = new byte[bufferSize];
        try (InputStream stream = getReadableStream(fileRef, InputStream.class)) {
            IOUtils.copyLarge(stream, outputStream, b);
        }
    }
}

---

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

/**
 * ByteBuffer//from ww  w.j  a  v a  2s  .c  o  m
 * @return
 */
public ByteBuffer marshall() {
    int length = getSize();
    ByteBuffer buffer = ByteBuffer.allocate(length);
    buffer.putLong(type);
    buffer.putInt(length);
    buffer.put(payLoad);
    buffer.flip();
    payLoad.clear();
    return buffer;
}

---

From source file:net.socket.nio.TimeClientHandle.java

private void handleInput(SelectionKey key) throws IOException {

    if (key.isValid()) {
        // ??/*  w w  w .jav a2  s  . co m*/
        SocketChannel sc = (SocketChannel) key.channel();
        if (key.isConnectable()) {
            if (sc.finishConnect()) {
                sc.register(selector, SelectionKey.OP_READ);
                doWrite(sc);
            } else {
                System.exit(1);// 
            }
        }
        if (key.isReadable()) {
            ByteBuffer readBuffer = ByteBuffer.allocate(1024);
            int readBytes = sc.read(readBuffer);
            if (readBytes > 0) {
                readBuffer.flip();
                byte[] bytes = new byte[readBuffer.remaining()];
                readBuffer.get(bytes);
                String body = new String(bytes, "UTF-8");
                System.out.println("Now is : " + body);
                this.stop = true;
            } else if (readBytes < 0) {
                // 
                key.cancel();
                sc.close();
            } else {
                ; // 0
            }
        }
    }

}

---

From source file:com.unister.semweb.drums.file.SpecificEnlargmentTest.java

/** Converts the given {@link List} of {@link TestStorable} to a {@link ByteBuffer}. */
private ByteBuffer toByteBuffer(List<TestStorable> toConvert) {
    ByteBuffer buffer = ByteBuffer.allocate(toConvert.size() * globalParameters.getElementSize());
    for (TestStorable oneElement : toConvert) {
        buffer.put(oneElement.toByteBuffer());
    }//w w  w  . ja v a2 s.c  o m
    buffer.flip();
    return buffer;
}

---

From source file:com.koda.integ.hbase.test.BlockCacheSimpleTest.java

/**
 * Test byte cacheable./*from   ww  w  .  j ava 2s. co  m*/
 *
 * @throws IOException Signals that an I/O exception has occurred.
 */
public void testByteCacheable() throws IOException {
    LOG.info("Test byte cacheable started");

    byte[] array = new byte[30000];
    Random r = new Random();
    r.nextBytes(array);

    ByteArrayCacheable bac = new ByteArrayCacheable(array);

    ByteBuffer buf = ByteBuffer.allocate(100000);

    bac.serialize(buf);

    buf.flip();

    ByteArrayCacheable bb = (ByteArrayCacheable) ByteArrayCacheable.deserializer.deserialize(buf);

    assertTrue(bb.equals(bac));
    LOG.info("Test byte cacheable finished");
}

---

From source file:com.taobao.common.tfs.comm.TfsClient.java

public Object invoke(final BasePacket packet, final long timeout) throws TfsException {
    if (isDebugEnabled) {
        log.debug("send request [" + packet.getChid() + "],time is:" + System.currentTimeMillis());
    }/*from  ww w  .  j a va2s.  c  o  m*/
    ArrayBlockingQueue<Object> queue = new ArrayBlockingQueue<Object>(1);
    responses.put(packet.getChid(), queue);
    ByteBuffer bb = packet.getByteBuffer();
    bb.flip();
    byte[] data = new byte[bb.remaining()];
    bb.get(data);
    WriteFuture writeFuture = session.write(data);
    writeFuture.addListener(new IoFutureListener() {

        public void operationComplete(IoFuture future) {

            WriteFuture wfuture = (WriteFuture) future;
            if (wfuture.isWritten()) {
                return;
            }
            String error = "send message to tfs server error [" + packet.getChid() + "], tfs server: "
                    + session.getRemoteAddress() + ", maybe because this connection closed: "
                    + !session.isConnected();

            try {
                putResponse(packet.getChid(), new TfsException(error));
            } catch (TfsException e) {
                // should never happen
                log.error("put response fail", e);
            }

            // close this session
            if (session.isConnected()) {
                session.close();
            } else {
                TfsClientFactory.getInstance().removeClient(key);
            }
        }

    });

    Object response = null;
    try {
        response = queue.poll(timeout, TimeUnit.MILLISECONDS);
        if (response == null) { // timeout
            return null;
        } else if (response instanceof TfsException) {
            throw (TfsException) response;
        }
    } catch (InterruptedException e) {
        throw new TfsException("tfs client invoke error", e);
    } finally {
        responses.remove(packet.getChid());
        // For GC
        queue = null;
    }
    if (isDebugEnabled) {
        log.debug("return response [" + packet.getChid() + "],time is:" + System.currentTimeMillis());
    }

    // do decode here
    if (response instanceof BasePacket) {
        ((BasePacket) response).decode();
    }
    return response;
}

---

From source file:com.sm.store.utils.FileStore.java

private boolean checkSignature(FileChannel channel) throws IOException {
    ByteBuffer intBytes = ByteBuffer.allocate(OFFSET);
    if (channel.size() == 0) {
        intBytes.putInt(MAGIC);/* w w w  .  j  a  v a  2s .  c o m*/
        intBytes.flip();
        channel.write(intBytes);
        return true;
    } else {
        channel.read(intBytes);
        intBytes.rewind();
        if (intBytes.getInt() != MAGIC)
            throw new StoreException("Header mismatch expect " + MAGIC + " read " + intBytes.getInt());
    }
    return true;
}

---

From source file:com.taobao.tair.comm.TairClient.java

public Object invoke(final BasePacket packet, final long timeout) throws TairClientException {
    if (isDebugEnabled) {
        LOGGER.debug("send request [" + packet.getChid() + "],time is:" + System.currentTimeMillis());
    }/*from w w w .  j  a  v  a2  s  .c  om*/
    ArrayBlockingQueue<Object> queue = new ArrayBlockingQueue<Object>(1);
    responses.put(packet.getChid(), queue);
    ByteBuffer bb = packet.getByteBuffer();
    bb.flip();
    byte[] data = new byte[bb.remaining()];
    bb.get(data);
    WriteFuture writeFuture = session.write(data);
    writeFuture.addListener(new IoFutureListener() {

        public void operationComplete(IoFuture future) {
            WriteFuture wfuture = (WriteFuture) future;
            if (wfuture.isWritten()) {
                return;
            }
            String error = "send message to tair server error [" + packet.getChid() + "], tair server: "
                    + session.getRemoteAddress() + ", maybe because this connection closed :"
                    + !session.isConnected();
            LOGGER.warn(error);
            TairResponse response = new TairResponse();
            response.setRequestId(packet.getChid());
            response.setResponse(new TairClientException(error));
            try {
                putResponse(packet.getChid(), response.getResponse());
            } catch (TairClientException e) {
                // IGNORE,should not happen
            }
            // close this session
            if (session.isConnected())
                session.close();
            else
                clientFactory.removeClient(key);
        }

    });
    Object response = null;
    try {
        response = queue.poll(timeout, TimeUnit.MILLISECONDS);
        if (response == null) {
            throw new TairClientException("tair client invoke timeout,timeout is: " + timeout
                    + ",requestId is: " + packet.getChid() + "request type:" + packet.getClass().getName());
        } else if (response instanceof TairClientException) {
            throw (TairClientException) response;
        }
    } catch (InterruptedException e) {
        throw new TairClientException("tair client invoke error", e);
    } finally {
        responses.remove(packet.getChid());
        // For GC
        queue = null;
    }
    if (isDebugEnabled) {
        LOGGER.debug("return response [" + packet.getChid() + "],time is:" + System.currentTimeMillis());
        LOGGER.debug("current responses size: " + responses.size());
    }

    // do decode here
    if (response instanceof BasePacket) {
        ((BasePacket) response).decode();
    }
    return response;
}

---

From source file:com.buaa.cfs.common.oncrpc.XDR.java

public XDR asReadOnlyWrap() {
    ByteBuffer b = buf.asReadOnlyBuffer();
    if (state == State.WRITING) {
        b.flip();
    }//from  ww  w.  j ava  2s  .c o m

    XDR n = new XDR(b, State.READING);
    return n;
}

---

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