Example usage for java.nio ByteBuffer clear

Introduction

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

Prototype

public final Buffer clear() 

Source Link

Document

Clears this buffer.

Usage

From source file:com.github.neoio.net.message.staging.file.TestFileMessageStaging.java

@Test
public void test() throws Exception {
    ByteBuffer buffer = ByteBuffer.allocate(1024);

    buffer.put("Hello World".getBytes("US-ASCII"));
    buffer.flip();/*from w  ww .java 2  s  .c  o  m*/
    Assert.assertEquals(11, staging.writeTempReadBytes(buffer));
    Assert.assertTrue(staging.hasTempReadBytes());
    buffer.clear();
    Assert.assertEquals(11, staging.readTempReadBytes(buffer));
    buffer.put("Hello World".getBytes("US-ASCII"));
    buffer.flip();
    staging.writePrimaryStaging(buffer, 22);
    buffer.clear();
    staging.getPrimaryStage().read(buffer);
    Assert.assertEquals("Hello WorldHello World", new String(buffer.array(), 0, 22));
}

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From source file:org.apache.hadoop.tracing.TestTracing.java

private void readTestFile(String testFileName) throws Exception {
    Path filePath = new Path(testFileName);
    FSDataInputStream istream = dfs.open(filePath, 10240);
    ByteBuffer buf = ByteBuffer.allocate(10240);

    int count = 0;
    try {/*from ww  w  . j a v  a 2 s .  c  o m*/
        while (istream.read(buf) > 0) {
            count += 1;
            buf.clear();
            istream.seek(istream.getPos() + 5);
        }
    } catch (IOException ioe) {
        // Ignore this it's probably a seek after eof.
    } finally {
        istream.close();
    }
}

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From source file:com.sastix.cms.server.services.cache.CacheFileUtilsServiceImpl.java

@Override
public byte[] downloadResource(URL url) throws IOException {
    //create buffer with capacity in bytes
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    try {//ww  w  .ja v a 2 s  .  co m
        ByteBuffer bufIn = ByteBuffer.allocate(1024);
        ReadableByteChannel rbc = Channels.newChannel(url.openStream());
        int bytesRead;
        while ((bytesRead = rbc.read(bufIn)) > 0) {
            baos.write(bufIn.array(), 0, bytesRead);
            bufIn.rewind();
        }
        bufIn.clear();
        return baos.toByteArray();
    } finally {
        baos.close();
    }
}

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From source file:org.talend.studio.StudioInstaller.java

boolean checkFile(File file, String data) {
    FileInputStream fis = null;/*ww w  .  ja v  a 2s.c om*/
    try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        fis = new FileInputStream(file);
        FileChannel fc = fis.getChannel();
        ByteBuffer buffer = ByteBuffer.allocate(1024);
        while (true) {
            int length = fc.read(buffer);
            if (length < 1) {
                break;
            }
            buffer.flip();
            md5.update(buffer);
            buffer.clear();
        }
        byte[] ret = md5.digest();
        return BuildUtil.toHexString(ret).equals(data.trim().toUpperCase());
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        IOUtils.closeQuietly(fis);
    }
    return false;
}

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From source file:org.apache.hadoop.hbase.client.TestResult.java

public void testBasicLoadValue() throws Exception {
    KeyValue[] kvs = genKVs(row, family, value, 1, 100);

    Arrays.sort(kvs, KeyValue.COMPARATOR);

    Result r = Result.create(kvs);
    ByteBuffer loadValueBuffer = ByteBuffer.allocate(1024);

    for (int i = 0; i < 100; ++i) {
        final byte[] qf = Bytes.toBytes(i);

        loadValueBuffer.clear();
        r.loadValue(family, qf, loadValueBuffer);
        loadValueBuffer.flip();/*from  w  w  w . ja  v  a  2  s  .  co  m*/
        assertEquals(ByteBuffer.wrap(Bytes.add(value, Bytes.toBytes(i))), loadValueBuffer);
        assertEquals(ByteBuffer.wrap(Bytes.add(value, Bytes.toBytes(i))), r.getValueAsByteBuffer(family, qf));
    }
}

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From source file:org.cloudata.core.commitlog.pipe.Bulk.java

private void addNewBuffersToList() {
    for (ByteBuffer buf : BufferPool.singleton().getBuffer(DEFAULT_BUFFER_SIZE)) {
        LOG.debug("add new buffer");
        buf.clear();
        bufferList.add(buf);/*from   ww  w . ja  v a2 s.c o  m*/
    }
}

---

From source file:siddur.solidtrust.classic.ClassicController.java

@RequestMapping(value = "/upload", method = RequestMethod.POST)
public String handleFormUpload(@RequestParam("file") MultipartFile file, Model model, HttpSession session)
        throws Exception {

    //upload/*  w  ww.j  av a2s  . co m*/
    log4j.info("Start uploading file: " + file.getName() + " with size: " + file.getSize());
    File temp = File.createTempFile("data", ".csv");
    log4j.info("Will save to " + temp.getAbsolutePath());

    InputStream in = null;
    FileOutputStream fout = null;

    try {
        fout = new FileOutputStream(temp);
        FileChannel fcout = fout.getChannel();

        in = file.getInputStream();
        ReadableByteChannel cin = Channels.newChannel(in);

        ByteBuffer buf = ByteBuffer.allocate(1024 * 8);
        while (true) {
            buf.clear();

            int r = cin.read(buf);

            if (r == -1) {
                break;
            }

            buf.flip();
            fcout.write(buf);
        }
    } finally {
        if (in != null) {
            in.close();
        }
        if (fout != null) {
            fout.close();
        }
    }
    log4j.info("Uploading complete");

    //fields
    BufferedReader br = null;
    int[] orders;
    try {
        in = new FileInputStream(temp);
        br = new BufferedReader(new InputStreamReader(in));

        //first line for fields
        String firstLine = br.readLine();
        orders = persister.validateTitle(firstLine);

        //persist
        persister.parseAndSave(br, orders, persister);
    } finally {
        if (br != null) {
            br.close();
        }
    }

    return "redirect:upload.html";
}

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From source file:com.sm.connector.server.ServerStore.java

protected Pair<byte[], byte[]> next(int current, ByteBuffer buf) throws IOException {
    buf.clear();
    long pos = OFFSET + (long) current * RECORD_SIZE;
    indexChannel.read(buf, pos);/*from  w  w  w  .  jav a  2 s  .  c o m*/
    buf.rewind();
    byte status = buf.get();
    if (isDeleted(status)) {
        return null;
    } else {
        long keyLen = buf.getLong();
        byte[] keys = readChannel(keyLen, keyChannel);
        long data = buf.getLong();
        long block2version = buf.getLong();
        CacheBlock block = new CacheBlock(current, data, block2version, status);
        if (block.getDataOffset() <= 0 || block.getDataLen() <= 0
                || block.getBlockSize() < block.getDataLen()) {
            throw new StoreException("data reading error");
        } else {
            //Key key = toKey(keys);
            byte[] datas = readChannel(block.getDataOffset2Len(), dataChannel);
            return new Pair(keys, datas);
        }
    }
}

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From source file:com.offbynull.portmapper.natpmp.NatPmpReceiver.java

/**
 * Start listening for NAT-PMP events. This method blocks until {@link #stop() } is called.
 * @param listener listener to notify of events
 * @throws IOException if socket error occurs
 * @throws NullPointerException if any argument is {@code null}
 *//*from  w w w .  j  a v  a2s. com*/
public void start(NatPmpEventListener listener) throws IOException {
    Validate.notNull(listener);

    MulticastSocket socket = null;
    try {
        final InetAddress group = InetAddress.getByName("224.0.0.1"); // NOPMD
        final int port = 5350;
        final InetSocketAddress groupAddress = new InetSocketAddress(group, port);

        socket = new MulticastSocket(port);

        if (!currentSocket.compareAndSet(null, socket)) {
            IOUtils.closeQuietly(socket);
            return;
        }

        socket.setReuseAddress(true);

        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface networkInterface = interfaces.nextElement();
            Enumeration<InetAddress> addrs = networkInterface.getInetAddresses();
            while (addrs.hasMoreElements()) { // make sure atleast 1 ipv4 addr bound to interface
                InetAddress addr = addrs.nextElement();

                try {
                    if (addr instanceof Inet4Address) {
                        socket.joinGroup(groupAddress, networkInterface);
                    }
                } catch (IOException ioe) { // NOPMD
                    // occurs with certain interfaces
                    // do nothing
                }
            }
        }

        ByteBuffer buffer = ByteBuffer.allocate(12);
        DatagramPacket data = new DatagramPacket(buffer.array(), buffer.capacity());

        while (true) {
            buffer.clear();
            socket.receive(data);
            buffer.position(data.getLength());
            buffer.flip();

            if (!data.getAddress().equals(gatewayAddress)) { // data isn't from our gateway, ignore
                continue;
            }

            if (buffer.remaining() != 12) { // data isn't the expected size, ignore
                continue;
            }

            int version = buffer.get(0);
            if (version != 0) { // data doesn't have the correct version, ignore
                continue;
            }

            int opcode = buffer.get(1) & 0xFF;
            if (opcode != 128) { // data doesn't have the correct op, ignore
                continue;
            }

            int resultCode = buffer.getShort(2) & 0xFFFF;
            switch (resultCode) {
            case 0:
                break;
            default:
                continue; // data doesn't have a successful result, ignore
            }

            listener.publicAddressUpdated(new ExternalAddressNatPmpResponse(buffer));
        }

    } catch (IOException ioe) {
        if (currentSocket.get() == null) {
            return; // ioexception caused by interruption/stop, so just return without propogating error up
        }

        throw ioe;
    } finally {
        IOUtils.closeQuietly(socket);
        currentSocket.set(null);
    }
}

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From source file:org.apache.kylin.storage.hbase.cube.v1.filter.TestFuzzyRowFilterV2EndToEnd.java

@SuppressWarnings("unchecked")
private void runTest(HTable hTable, int expectedSize) throws IOException {
    // [0, 2, ?, ?, ?, ?, 0, 0, 0, 1]
    byte[] fuzzyKey1 = new byte[10];
    ByteBuffer buf = ByteBuffer.wrap(fuzzyKey1);
    buf.clear();
    buf.putShort((short) 2);
    for (int i = 0; i < 4; i++)
        buf.put(fuzzyValue);/*from  w  w  w .  j ava2s . c o m*/
    buf.putInt((short) 1);
    byte[] mask1 = new byte[] { 0, 0, 1, 1, 1, 1, 0, 0, 0, 0 };

    byte[] fuzzyKey2 = new byte[10];
    buf = ByteBuffer.wrap(fuzzyKey2);
    buf.clear();
    buf.putShort((short) 2);
    buf.putInt((short) 2);
    for (int i = 0; i < 4; i++)
        buf.put(fuzzyValue);

    byte[] mask2 = new byte[] { 0, 0, 0, 0, 0, 0, 1, 1, 1, 1 };

    Pair<byte[], byte[]> pair1 = Pair.newPair(fuzzyKey1, mask1);
    Pair<byte[], byte[]> pair2 = Pair.newPair(fuzzyKey2, mask2);

    FuzzyRowFilterV2 fuzzyRowFilter1 = new FuzzyRowFilterV2(Lists.newArrayList(pair1));
    FuzzyRowFilterV2 fuzzyRowFilter2 = new FuzzyRowFilterV2(Lists.newArrayList(pair2));
    // regular test - we expect 1 row back (5 KVs)
    runScanner(hTable, expectedSize, fuzzyRowFilter1, fuzzyRowFilter2);
}

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