Example usage for java.nio ByteBuffer remaining

List of usage examples for java.nio ByteBuffer remaining

  1. HOME
  2. Java
  3. java
  4. java.nio.*
  5. ByteBuffer
  6. remaining

Introduction

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

Prototype

public final int remaining()

Source Link

Document

Returns the number of remaining elements in this buffer, that is limit - position .

Usage

From source file:org.apache.hc.client5.http.impl.auth.CredSspScheme.java

private byte[] encodeUnicode(final CharBuffer charBuffer) {
    if (charBuffer == null) {
        return EMPTYBUFFER;
    }//ww w  .jav a2s. c o  m
    final ByteBuffer encoded = UNICODE_LITTLE_UNMARKED.encode(charBuffer);
    if (!encoded.hasRemaining()) {
        return EMPTYBUFFER;
    }
    final byte[] bytes = new byte[encoded.remaining()];
    encoded.get(bytes);
    return bytes;
}

From source file:org.apache.bookkeeper.bookie.BookieJournalTest.java

private JournalChannel writeV3Journal(File journalDir, int numEntries, byte[] masterKey) throws Exception {
    long logId = System.currentTimeMillis();
    JournalChannel jc = new JournalChannel(journalDir, logId);

    moveToPosition(jc, JournalChannel.VERSION_HEADER_SIZE);

    BufferedChannel bc = jc.getBufferedChannel();

    byte[] data = new byte[1024];
    Arrays.fill(data, (byte) 'X');
    long lastConfirmed = LedgerHandle.INVALID_ENTRY_ID;
    for (int i = 0; i <= numEntries; i++) {
        ByteBuffer packet;
        if (i == 0) {
            packet = generateMetaEntry(1, masterKey);
        } else {//from  ww  w .  jav a 2 s  . co  m
            packet = ClientUtil.generatePacket(1, i, lastConfirmed, i * data.length, data).toByteBuffer();
        }
        lastConfirmed = i;
        ByteBuffer lenBuff = ByteBuffer.allocate(4);
        lenBuff.putInt(packet.remaining());
        lenBuff.flip();

        bc.write(lenBuff);
        bc.write(packet);
    }
    bc.flush(true);

    updateJournalVersion(jc, JournalChannel.V3);

    return jc;
}

From source file:org.apache.bookkeeper.bookie.BookieJournalTest.java

private JournalChannel writeV4Journal(File journalDir, int numEntries, byte[] masterKey) throws Exception {
    long logId = System.currentTimeMillis();
    JournalChannel jc = new JournalChannel(journalDir, logId);

    moveToPosition(jc, JournalChannel.VERSION_HEADER_SIZE);

    BufferedChannel bc = jc.getBufferedChannel();

    byte[] data = new byte[1024];
    Arrays.fill(data, (byte) 'X');
    long lastConfirmed = LedgerHandle.INVALID_ENTRY_ID;
    for (int i = 0; i <= numEntries; i++) {
        ByteBuffer packet;
        if (i == 0) {
            packet = generateMetaEntry(1, masterKey);
        } else {/*  w ww . j ava  2s.  c  o m*/
            packet = ClientUtil.generatePacket(1, i, lastConfirmed, i * data.length, data).toByteBuffer();
        }
        lastConfirmed = i;
        ByteBuffer lenBuff = ByteBuffer.allocate(4);
        lenBuff.putInt(packet.remaining());
        lenBuff.flip();
        bc.write(lenBuff);
        bc.write(packet);
    }
    // write fence key
    ByteBuffer packet = generateFenceEntry(1);
    ByteBuffer lenBuf = ByteBuffer.allocate(4);
    lenBuf.putInt(packet.remaining());
    lenBuf.flip();
    bc.write(lenBuf);
    bc.write(packet);
    bc.flush(true);
    updateJournalVersion(jc, JournalChannel.V4);
    return jc;
}

From source file:de.rwhq.btree.InnerNode.java

/**
 * @param rawKeys//  w  ww .  j  av a  2s .com
 * @param pageIds
 * @param fromId
 * @return
 */
public int bulkInitialize(final ArrayList<byte[]> rawKeys, final ArrayList<Integer> pageIds, final int fromId) {

    if (pageIds.size() < (fromId + 2) || rawKeys.size() != (pageIds.size() - 1))
        throw new IllegalArgumentException(
                "for bulkinsert, you must have at least 2 page ids and keys.size() == (pageIds.size() - 1)\n"
                        + "pageIds.size()=" + pageIds.size() + ";fromId=" + fromId + ";rawKeys.size()="
                        + rawKeys.size());

    final int fromId2 = fromId;

    initialize();
    final ByteBuffer buf = rawPage().bufferForWriting(Header.size());
    buf.putInt(pageIds.get(fromId2));

    final int requiredSpace = Integer.SIZE / 8 + rawKeys.get(0).length;
    final int spaceForEntries = buf.remaining() / requiredSpace;
    final int totalEntriesToInsert = (pageIds.size() - fromId - 1);
    int entriesToInsert = spaceForEntries < totalEntriesToInsert ? spaceForEntries : totalEntriesToInsert;

    // make sure that not exactly one pageId remains, because that can't be inserted alone in the next
    // InnerNode. == 2 because
    final int remaining = pageIds.size() - fromId - (entriesToInsert + 1);
    if (remaining == 1)
        entriesToInsert--;

    for (int i = 0; i < entriesToInsert; i++) {
        // System.out.println("fetching rawKey " + (fromId + i) + " from array length " + rawKeys.size() + " with i=" + i);
        buf.put(rawKeys.get(fromId + i)); // fromId + 1 - 1 +i
        //LOG.debug("insert key: " + keySerializer.deserialize(rawKeys.get(fromId + i)));
        buf.putInt(pageIds.get(fromId + 1 + i));
    }

    setNumberOfKeys(entriesToInsert);

    rawPage.sync();

    return entriesToInsert + 1; // page ids
}

From source file:com.github.ambry.utils.UtilsTest.java

@Test
public void testSerializeString() {
    String randomString = getRandomString(10);
    ByteBuffer outputBuffer = ByteBuffer.allocate(4 + randomString.getBytes().length);
    Utils.serializeString(outputBuffer, randomString, StandardCharsets.US_ASCII);
    outputBuffer.flip();/*from  w  w w .  j a v  a 2s .com*/
    int length = outputBuffer.getInt();
    assertEquals("Input and output string lengths don't match", randomString.getBytes().length, length);
    byte[] output = new byte[length];
    outputBuffer.get(output);
    assertFalse("Output buffer shouldn't have any remaining, but has " + outputBuffer.remaining() + " bytes",
            outputBuffer.hasRemaining());
    String outputString = new String(output);
    assertEquals("Input and output strings don't match", randomString, outputString);

    randomString = getRandomString(10) + "";
    outputBuffer = ByteBuffer.allocate(4 + randomString.getBytes().length);
    Utils.serializeString(outputBuffer, randomString, StandardCharsets.US_ASCII);
    outputBuffer.flip();
    length = outputBuffer.getInt();
    assertEquals("Input and output string lengths don't match ", (randomString.getBytes().length - 1), length);
    output = new byte[length];
    outputBuffer.get(output);
    assertFalse("Output buffer shouldn't have any remaining, but has " + outputBuffer.remaining() + " bytes",
            outputBuffer.hasRemaining());
    outputString = new String(output);
    randomString = randomString.substring(0, randomString.length() - 1) + "?";
    assertEquals("Input and output strings don't match", randomString, outputString);

    randomString = "";
    outputBuffer = ByteBuffer.allocate(4);
    Utils.serializeString(outputBuffer, randomString, StandardCharsets.US_ASCII);
    outputBuffer.flip();
    length = outputBuffer.getInt();
    assertEquals("Input and output string lengths don't match", 0, length);
    output = new byte[length];
    outputBuffer.get(output);
    assertFalse("Output buffer shouldn't have any remaining, but has " + outputBuffer.remaining() + " bytes",
            outputBuffer.hasRemaining());
    outputString = new String(output);
    assertEquals("Output string \"" + outputString + "\" expected to be empty", outputString, "");

    randomString = getRandomString(10);
    outputBuffer = ByteBuffer.allocate(4 + randomString.getBytes().length - 1);
    try {
        Utils.serializeString(outputBuffer, randomString, StandardCharsets.US_ASCII);
        Assert.fail("Serialization should have failed due to insufficient space");
    } catch (RuntimeException e) {
    }
}

From source file:org.apache.bookkeeper.bookie.BookieJournalTest.java

private JournalChannel writeV5Journal(File journalDir, int numEntries, byte[] masterKey) throws Exception {
    long logId = System.currentTimeMillis();
    JournalChannel jc = new JournalChannel(journalDir, logId);

    BufferedChannel bc = jc.getBufferedChannel();

    ByteBuffer paddingBuff = ByteBuffer.allocateDirect(2 * JournalChannel.SECTOR_SIZE);
    ZeroBuffer.put(paddingBuff);//  w  w w .j  a  v a  2  s  .  co m
    byte[] data = new byte[4 * 1024 * 1024];
    Arrays.fill(data, (byte) 'X');
    long lastConfirmed = LedgerHandle.INVALID_ENTRY_ID;
    long length = 0;
    for (int i = 0; i <= numEntries; i++) {
        ByteBuffer packet;
        if (i == 0) {
            packet = generateMetaEntry(1, masterKey);
        } else {
            packet = ClientUtil.generatePacket(1, i, lastConfirmed, length, data, 0, i).toByteBuffer();
        }
        lastConfirmed = i;
        length += i;
        ByteBuffer lenBuff = ByteBuffer.allocate(4);
        lenBuff.putInt(packet.remaining());
        lenBuff.flip();
        bc.write(lenBuff);
        bc.write(packet);
        Journal.writePaddingBytes(jc, paddingBuff, JournalChannel.SECTOR_SIZE);
    }
    // write fence key
    ByteBuffer packet = generateFenceEntry(1);
    ByteBuffer lenBuf = ByteBuffer.allocate(4);
    lenBuf.putInt(packet.remaining());
    lenBuf.flip();
    bc.write(lenBuf);
    bc.write(packet);
    Journal.writePaddingBytes(jc, paddingBuff, JournalChannel.SECTOR_SIZE);
    bc.flush(true);
    updateJournalVersion(jc, JournalChannel.V5);
    return jc;
}

From source file:Proxy.java

/**
 * Read all data from <code>from</code> and write it to <code>to</code>.
 * Returns false if channel was closed/*from  w  w  w.ja v  a2s.com*/
 */
boolean relay(SocketChannel from, SocketChannel to, ByteBuffer buf) throws Exception {
    int num;
    StringBuilder sb;

    buf.clear();
    while (true) {
        num = from.read(buf);
        if (num < 0)
            return false;
        else if (num == 0)
            return true;
        buf.flip();
        if (verbose) {
            log(printRelayedData(toString(from), toString(to), buf.remaining()));
        }
        if (debug) {
            sb = new StringBuilder();
            sb.append(new String(buf.array()).trim());
            sb.append('\n');
            log(sb.toString());
        }
        to.write(buf);
        buf.flip();
    }
}

From source file:com.vest.album.fragment.CameraBasicFragment.java

private void sureSave() {
    ByteBuffer buffer = image.getPlanes()[0].getBuffer();
    byte[] bytes = new byte[buffer.remaining()];
    buffer.get(bytes);/*from   w  ww. j a  v  a2s . com*/
    FileOutputStream output = null;
    try {
        output = new FileOutputStream(mFilePath);
        output.write(bytes);
        callback.onPhotoSuccess(mFilePath);
    } catch (IOException e) {
        e.printStackTrace();
        callback.onPhotoError("??");
    } finally {
        image.close();
        if (null != output) {
            try {
                output.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

From source file:com.flexive.core.stream.BinaryUploadProtocol.java

/**
 * {@inheritDoc}//from  w  w  w .  j  a  va2s .com
 */
@Override
public synchronized boolean receiveStream(ByteBuffer buffer) throws IOException {
    if (!buffer.hasRemaining()) {
        //this can only happen on remote clients
        if (LOG.isDebugEnabled())
            LOG.debug("aborting (empty)");
        return false;
    }
    if (!rcvStarted) {
        rcvStarted = true;
        if (LOG.isDebugEnabled())
            LOG.debug("(internal serverside) receive start");
        try {
            pout = getContentStorage().receiveTransitBinary(division, handle, mimeType, expectedLength,
                    timeToLive);
        } catch (SQLException e) {
            LOG.error("SQL Error trying to receive binary stream: " + e.getMessage(), e);
        } catch (FxNotFoundException e) {
            LOG.error("Failed to lookup content storage for division #" + division + ": "
                    + e.getLocalizedMessage());
        }
    }
    if (LOG.isDebugEnabled() && count + buffer.remaining() > expectedLength) {
        LOG.debug("poss. overflow: pos=" + buffer.position() + " lim=" + buffer.limit() + " cap="
                + buffer.capacity());
        LOG.debug("Curr count: " + count + " count+rem="
                + (count + buffer.remaining() + " delta:" + ((count + buffer.remaining()) - expectedLength)));
    }
    count += buffer.remaining();
    pout.write(buffer.array(), buffer.position(), buffer.remaining());
    buffer.clear();
    if (expectedLength > 0 && count >= expectedLength) {
        if (LOG.isDebugEnabled())
            LOG.debug("aborting");
        return false;
    }
    return true;
}

From source file:com.obviousengine.android.focus.ZslFocusCamera.java

/**
 * Given an image reader, extracts the JPEG image bytes and then closes the
 * reader.//from  w  w w.j  av a 2  s . co  m
 *
 * @param img the image from which to extract jpeg bytes or compress to
 *            jpeg.
 * @return The bytes of the JPEG image. Newly allocated.
 */
private byte[] acquireJpegBytes(Image img) {
    ByteBuffer buffer;

    if (img.getFormat() == ImageFormat.JPEG) {
        Image.Plane plane0 = img.getPlanes()[0];
        buffer = plane0.getBuffer();

        byte[] imageBytes = new byte[buffer.remaining()];
        buffer.get(imageBytes);
        buffer.rewind();
        return imageBytes;
    } else {
        throw new RuntimeException("Unsupported image format.");
    }
}