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:com.metamx.collections.spatial.search.RectangularBound.java

@Override
public byte[] getCacheKey() {
    ByteBuffer minCoordsBuffer = ByteBuffer.allocate(minCoords.length * Floats.BYTES);
    minCoordsBuffer.asFloatBuffer().put(minCoords);
    final byte[] minCoordsCacheKey = minCoordsBuffer.array();

    ByteBuffer maxCoordsBuffer = ByteBuffer.allocate(maxCoords.length * Floats.BYTES);
    maxCoordsBuffer.asFloatBuffer().put(maxCoords);
    final byte[] maxCoordsCacheKey = maxCoordsBuffer.array();

    final ByteBuffer cacheKey = ByteBuffer.allocate(1 + minCoordsCacheKey.length + maxCoordsCacheKey.length)
            .put(minCoordsCacheKey).put(maxCoordsCacheKey).put(CACHE_TYPE_ID);
    return cacheKey.array();
}

From source file:org.red5.stream.http.servlet.TransportSegmentFeeder.java

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
 *      response)/*from  ww w .j  a v  a  2  s.  c o  m*/
 */
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    log.debug("Segment feed requested");
    // get red5 context and segmenter
    if (service == null) {
        ApplicationContext appCtx = (ApplicationContext) getServletContext()
                .getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
        service = (SegmenterService) appCtx.getBean("segmenter.service");
    }
    // get the requested stream / segment
    String servletPath = request.getServletPath();
    String streamName = servletPath.split("\\.")[0];
    log.debug("Stream name: {}", streamName);
    if (service.isAvailable(streamName)) {
        response.setContentType("video/MP2T");
        // data segment
        Segment segment = null;
        // setup buffers and output stream
        byte[] buf = new byte[188];
        ByteBuffer buffer = ByteBuffer.allocate(188);
        ServletOutputStream sos = response.getOutputStream();
        // loop segments
        while ((segment = service.getSegment(streamName)) != null) {
            do {
                buffer = segment.read(buffer);
                // log.trace("Limit - position: {}", (buffer.limit() - buffer.position()));
                if ((buffer.limit() - buffer.position()) == 188) {
                    buffer.get(buf);
                    // write down the output stream
                    sos.write(buf);
                } else {
                    log.info("Segment result has indicated a problem");
                    // verifies the currently requested stream segment
                    // number against the currently active segment
                    if (service.getSegment(streamName) == null) {
                        log.debug("Requested segment is no longer available");
                        break;
                    }
                }
                buffer.clear();
            } while (segment.hasMoreData());
            log.trace("Segment {} had no more data", segment.getIndex());
            // flush
            sos.flush();
            // segment had no more data
            segment.cleanupThreadLocal();
        }
        buffer.clear();
        buffer = null;
    } else {
        // let requester know that stream segment is not available
        response.sendError(404, "Requested segmented stream not found");
    }
}

From source file:de.nx42.maps4cim.map.texture.osm.OsmHash.java

protected static String getQueryHashLocation(Area bounds) throws IOException {

    /*//from   w  w w  .ja v  a2s . co  m
     * - base64 encode, every char holds 6 bits (2^6 = 64)
     * - 3 chars per float = 18bit precision = enough for 3 sigificant digits
     *   for numbers <256 (which is the case in WGS84)
     * - 4 values -> 12 chars. 72bit or 8 byte of information
     * - use URL safe encoding, or file name failures are expected!
     */

    // calculate size:  4 values, 8 bits per byte
    int bufSize = (int) Math.ceil(4 * locationPrecision / 8.0);

    ByteBuffer byteBuf = ByteBuffer.allocate(bufSize);
    BitOutput bitOut = BitOutput.newInstance(byteBuf); // direct

    storeCoordinate(bounds.getMinLat(), bitOut);
    storeCoordinate(bounds.getMaxLat(), bitOut);
    storeCoordinate(bounds.getMinLon(), bitOut);
    storeCoordinate(bounds.getMaxLon(), bitOut);

    // get array, return as Base64 (URL safe)
    byte[] ar = byteBuf.array();
    return Base64.encodeBase64URLSafeString(ar);

}

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

private void reset() throws IOException {
    ByteBuffer buf = ByteBuffer.allocate(RECORD_SIZE);
    long pos = OFFSET + (long) (totalRecord - 1) * RECORD_SIZE;
    indexChannel.read(buf, pos);//from   w w w.ja v a2s .  c om
    buf.rewind();
    byte status = buf.get();
    long keyLen = buf.getLong();
    byte[] keys = readChannel(keyLen, keyChannel);
    long data = buf.getLong();
    long block2version = buf.getLong();
    CacheBlock block = new CacheBlock(totalRecord, data, block2version, status);
    byte[] datas = readChannel(block.getDataOffset2Len(), dataChannel);

}

From source file:com.openteach.diamond.network.waverider.session.DefaultSession.java

public static void main(String[] args) {

    BlockingQueue<ByteBuffer> inputBuffer = new LinkedBlockingQueue<ByteBuffer>();
    /*for (int i = 0; i < 10; i++)
    {*//*from  ww w .  j av a 2s.  c o m*/
    ByteBuffer byteBuffer = ByteBuffer.allocate(1024);
    byteBuffer.put(makePacket().marshall());
    byteBuffer.put(makePacket().marshall());
    byteBuffer.flip();
    byte[] b = new byte[8];
    ByteBuffer halfBuf0 = ByteBuffer.allocate(8);
    byteBuffer.get(b);
    halfBuf0.put(b);
    halfBuf0.flip();
    inputBuffer.add(halfBuf0);
    inputBuffer.add(byteBuffer);
    /*}*/

    int size = 0;
    int oldSize = size;
    long length = Packet.getHeaderSize();
    ByteBuffer buffer = ByteBuffer.allocate(NetWorkConstants.DEFAULT_NETWORK_BUFFER_SIZE);
    ByteBuffer currentBuffer = null;

    while (size < length) {
        currentBuffer = inputBuffer.peek();
        oldSize = size;
        int position = currentBuffer.position();
        size += currentBuffer.remaining();
        buffer.put(currentBuffer);
        if (size >= Packet.getHeaderSize()) {
            length = buffer.getLong(Packet.getLengthPosition());
        }

        if (size <= length) {
            inputBuffer.remove();
        } else {
            currentBuffer.position(position);
            buffer.position(buffer.position() - currentBuffer.remaining());
            byte[] buf = new byte[(int) (length - oldSize)];
            currentBuffer.get(buf);
            buffer.put(buf);
        }
    }

    // buffer.position(0);
    buffer.flip();
    Packet packet = Packet.unmarshall(buffer);

    Command command = CommandFactory.createCommand(packet.getType(), packet.getPayLoad());

    String str = new String(command.getPayLoad().array());

    System.out.println(str);

}

From source file:Main.java

/**
 * Decodes the specified URL as per RFC 3986, i.e. transforms
 * percent-encoded octets to characters by decoding with the UTF-8 character
 * set. This function is primarily intended for usage with
 * {@link URL} which unfortunately does not enforce proper URLs. As
 * such, this method will leniently accept invalid characters or malformed
 * percent-encoded octets and simply pass them literally through to the
 * result string. Except for rare edge cases, this will make unencoded URLs
 * pass through unaltered./*from  w  w w.  j  a v  a2 s  . c  o  m*/
 *
 * @param url The URL to decode, may be {@code null}.
 * @return The decoded URL or {@code null} if the input was
 * {@code null}.
 */
static String decodeUrl(String url) {
    String decoded = url;
    if (url != null && url.indexOf('%') >= 0) {
        int n = url.length();
        StringBuffer buffer = new StringBuffer();
        ByteBuffer bytes = ByteBuffer.allocate(n);
        for (int i = 0; i < n;) {
            if (url.charAt(i) == '%') {
                try {
                    do {
                        byte octet = (byte) Integer.parseInt(url.substring(i + 1, i + 3), 16);
                        bytes.put(octet);
                        i += 3;
                    } while (i < n && url.charAt(i) == '%');
                    continue;
                } catch (RuntimeException e) {
                    // malformed percent-encoded octet, fall through and
                    // append characters literally
                } finally {
                    if (bytes.position() > 0) {
                        bytes.flip();
                        buffer.append(UTF8.decode(bytes).toString());
                        bytes.clear();
                    }
                }
            }
            buffer.append(url.charAt(i++));
        }
        decoded = buffer.toString();
    }
    return decoded;
}

From source file:com.clustercontrol.platform.infra.InfraJdbcExecutorSupport.java

public static void execInsertFileContent(String fileId, DataHandler handler)
        throws HinemosUnknown, InfraFileTooLarge {
    Connection conn = null;// w  w  w.ja  v  a2s  .c om

    JpaTransactionManager tm = null;
    PGCopyOutputStream pgStream = null;
    FileOutputStream fos = null;
    BufferedInputStream bis = null;
    File tempFile = null;
    try {
        tm = new JpaTransactionManager();
        conn = tm.getEntityManager().unwrap(java.sql.Connection.class);
        conn.setAutoCommit(false);

        pgStream = new PGCopyOutputStream((PGConnection) conn,
                "COPY binarydata.cc_infra_file_content(file_id, file_content) FROM STDIN WITH (FORMAT BINARY)");

        String exportDirectory = HinemosPropertyUtil.getHinemosPropertyStr("infra.export.dir",
                HinemosPropertyDefault.getString(HinemosPropertyDefault.StringKey.INFRA_EXPORT_DIR));
        tempFile = new File(exportDirectory + fileId);
        fos = new FileOutputStream(tempFile);
        handler.writeTo(fos);

        long fileLength = tempFile.length();
        int maxSize = HinemosPropertyUtil.getHinemosPropertyNum(MAX_FILE_KEY, Long.valueOf(1024 * 1024 * 64))
                .intValue(); // 64MB
        if (fileLength > maxSize) {
            throw new InfraFileTooLarge(String.format("File size is larger than the limit size(%d)", maxSize));
        }

        pgStream.write(HEADER_SIGN_PART);
        pgStream.write(HEADER_FLG_FIELD_PART);
        pgStream.write(HEADER_EX_PART);
        pgStream.write(TUPLE_FIELD_COUNT_PART);
        pgStream.write(ByteBuffer.allocate(4).putInt(fileId.getBytes().length).array());
        pgStream.write(fileId.getBytes());
        pgStream.write(ByteBuffer.allocate(4).putInt((int) fileLength).array());

        bis = new BufferedInputStream(new FileInputStream(tempFile));
        byte[] buf = new byte[1024 * 1024];
        int read;
        while ((read = bis.read(buf)) != -1) {
            pgStream.write(buf, 0, read);
        }
        pgStream.write(FILETRAILER);
        pgStream.flush();

        if (!tm.isNestedEm()) {
            conn.commit();
        }
    } catch (InfraFileTooLarge e) {
        log.warn(e.getMessage());
        try {
            pgStream.close();
        } catch (IOException e1) {
            log.warn(e1);
        }
        try {
            conn.rollback();
        } catch (SQLException e1) {
            log.warn(e1);
        }
        throw e;
    } catch (Exception e) {
        log.warn(e.getMessage(), e);
        try {
            if (pgStream != null)
                pgStream.close();
        } catch (IOException e1) {
            log.warn(e1);
        }
        try {
            if (conn != null)
                conn.rollback();
        } catch (SQLException e1) {
            log.warn(e1);
        }
        throw new HinemosUnknown(e.getMessage(), e);
    } finally {
        if (fos != null) {
            try {
                fos.close();
            } catch (IOException e) {
                log.warn(e.getMessage(), e);
                throw new HinemosUnknown(e.getMessage(), e);
            }
        }
        if (bis != null) {
            try {
                bis.close();
            } catch (IOException e) {
                log.warn(e.getMessage(), e);
                throw new HinemosUnknown(e.getMessage(), e);
            }
        }
        if (pgStream != null) {
            try {
                pgStream.close();
            } catch (IOException e) {
                log.warn(e.getMessage(), e);
                throw new HinemosUnknown(e.getMessage(), e);
            }
        }
        if (tm != null) {
            tm.close();
        }
        if (tempFile == null) {
            log.debug("Fail to delete. tempFile is null");
        } else if (!tempFile.delete()) {
            log.debug("Fail to delete " + tempFile.getAbsolutePath());
        }
    }
}

From source file:com.cerema.cloud2.lib.common.network.FileRequestEntity.java

@Override
public void writeRequest(final OutputStream out) throws IOException {
    //byte[] tmp = new byte[4096];
    ByteBuffer tmp = ByteBuffer.allocate(4096);
    int readResult = 0;

    // TODO(bprzybylski): each mem allocation can throw OutOfMemoryError we need to handle it
    //                    globally in some fashionable manner
    RandomAccessFile raf = new RandomAccessFile(mFile, "r");
    FileChannel channel = raf.getChannel();
    Iterator<OnDatatransferProgressListener> it = null;
    long transferred = 0;
    long size = mFile.length();
    if (size == 0)
        size = -1;/*w  w w .ja v a  2  s .  c o m*/
    try {
        while ((readResult = channel.read(tmp)) >= 0) {
            out.write(tmp.array(), 0, readResult);
            tmp.clear();
            transferred += readResult;
            synchronized (mDataTransferListeners) {
                it = mDataTransferListeners.iterator();
                while (it.hasNext()) {
                    it.next().onTransferProgress(readResult, transferred, size, mFile.getAbsolutePath());
                }
            }
        }

    } catch (IOException io) {
        Log_OC.e("FileRequestException", io.getMessage());
        throw new RuntimeException(
                "Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really",
                io);

    } finally {
        channel.close();
        raf.close();
    }
}

From source file:com.owncloud.android.lib.common.network.FileRequestEntity.java

@Override
public void writeRequest(final OutputStream out) throws IOException {
    //byte[] tmp = new byte[4096];
    ByteBuffer tmp = ByteBuffer.allocate(4096);
    int readResult = 0;

    //                    globally in some fashionable manner
    RandomAccessFile raf = new RandomAccessFile(mFile, "r");
    FileChannel channel = raf.getChannel();
    Iterator<OnDatatransferProgressListener> it = null;
    long transferred = 0;
    long size = mFile.length();
    if (size == 0)
        size = -1;/* w w  w  . j a v a  2s. c  o m*/
    try {
        while ((readResult = channel.read(tmp)) >= 0) {
            out.write(tmp.array(), 0, readResult);
            tmp.clear();
            transferred += readResult;
            synchronized (mDataTransferListeners) {
                it = mDataTransferListeners.iterator();
                while (it.hasNext()) {
                    it.next().onTransferProgress(readResult, transferred, size, mFile.getAbsolutePath());
                }
            }
        }

    } catch (IOException io) {
        Log_OC.e("FileRequestException", io.getMessage());
        throw new RuntimeException(
                "Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really",
                io);

    } finally {
        channel.close();
        raf.close();
    }
}

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 {//from  w  w  w . j  a va  2s. co  m
            bb.put(buffer);
        }
    }

    //important
    bb.flip();

    return bb;
}