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:org.apache.hadoop.hbase.io.ByteBufferPool.java

/**
 * @return One free ByteBuffer from the pool. If no free ByteBuffer and we have not reached the
 *         maximum pool size, it will create a new one and return. In case of max pool size also
 *         reached, will return null. When pool returned a ByteBuffer, make sure to return it back
 *         to pool after use.//ww  w .  jav a  2  s  .c  o  m
 * @see #putbackBuffer(ByteBuffer)
 */
public ByteBuffer getBuffer() {
    ByteBuffer bb = buffers.poll();
    if (bb != null) {
        // Clear sets limit == capacity. Position == 0.
        bb.clear();
        return bb;
    }
    while (true) {
        int c = this.count.intValue();
        if (c >= this.maxPoolSize) {
            if (maxPoolSizeInfoLevelLogged) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Pool already reached its max capacity : " + this.maxPoolSize
                            + " and no free buffers now. Consider increasing the value for '"
                            + MAX_POOL_SIZE_KEY + "' ?");
                }
            } else {
                LOG.info("Pool already reached its max capacity : " + this.maxPoolSize
                        + " and no free buffers now. Consider increasing the value for '" + MAX_POOL_SIZE_KEY
                        + "' ?");
                maxPoolSizeInfoLevelLogged = true;
            }
            return null;
        }
        if (!this.count.compareAndSet(c, c + 1)) {
            continue;
        }
        if (LOG.isTraceEnabled()) {
            LOG.trace("Creating a new offheap ByteBuffer of size: " + this.bufferSize);
        }
        return this.directByteBuffer ? ByteBuffer.allocateDirect(this.bufferSize)
                : ByteBuffer.allocate(this.bufferSize);
    }
}

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

public void returnBuffer(ByteBuffer[] bufferArray) {
    synchronized (bufferMap) {
        for (ByteBuffer buf : bufferArray) {
            buf.clear();
            TreeSet<PoolEntry> entrySet = bufferMap.get(buf.capacity());
            if (entrySet == null) {
                entrySet = new TreeSet<PoolEntry>();
                bufferMap.put(buf.capacity(), entrySet);
            }//from  w  ww .  jav a2  s .c om
            entrySet.add(new PoolEntry(buf));
            poolMonitor.increaseBuffered(buf.capacity());
        }
    }
}

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From source file:com.turbospaces.serialization.PropertiesSerializer.java

@Override
public Object readID(final ByteBuffer buffer) {
    final CachedSerializationProperty idProperty = cachedProperties[BO.getIdIndex()];
    Object id = DecoratedKryo.readPropertyValue(kryo, idProperty, buffer);
    buffer.clear();
    return id;//from   ww  w  .  j  ava2  s.  c  o  m
}

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From source file:org.apache.nifi.processors.standard.util.BaseStrictSyslog5424ParserTest.java

@Test
public void testRFC5424WithVersion() {
    final String pri = "34";
    final String version = "1";
    final String stamp = "2003-10-11T22:14:15.003Z";
    final String host = "mymachine.example.com";
    final String appName = "su";
    final String procId = "-";
    final String msgId = "ID17";
    final String structuredData = "-";
    final String body = "BOM'su root' failed for lonvick on /dev/pts/8";

    final String message = "<" + pri + ">" + version + " " + stamp + " " + host + " " + appName + " " + procId
            + " " + msgId + " " + "-" + " " + body;

    final byte[] bytes = message.getBytes(CHARSET);
    final ByteBuffer buffer = ByteBuffer.allocate(bytes.length);
    buffer.clear();
    buffer.put(bytes);//  www .j a  va 2s  .  co  m

    final Syslog5424Event event = parser.parseEvent(buffer);
    Assert.assertNotNull(event);
    Assert.assertTrue(event.isValid());
    Assert.assertFalse(event.getFieldMap().isEmpty());
    Map<String, String> fieldMap = event.getFieldMap();
    Assert.assertEquals(pri, fieldMap.get(SyslogAttributes.PRIORITY.key()));
    Assert.assertEquals("2", fieldMap.get(SyslogAttributes.SEVERITY.key()));
    Assert.assertEquals("4", fieldMap.get(SyslogAttributes.FACILITY.key()));
    Assert.assertEquals(version, fieldMap.get(SyslogAttributes.VERSION.key()));
    Assert.assertEquals(stamp, fieldMap.get(SyslogAttributes.TIMESTAMP.key()));
    Assert.assertEquals(host, fieldMap.get(SyslogAttributes.HOSTNAME.key()));
    Assert.assertEquals(appName, fieldMap.get(Syslog5424Attributes.APP_NAME.key()));
    validateForPolicy(procId, fieldMap.get(Syslog5424Attributes.PROCID.key()));
    Assert.assertEquals(msgId, fieldMap.get(Syslog5424Attributes.MESSAGEID.key()));

    Pattern structuredPattern = new StrictSyslog5424Parser.NifiKeyProvider()
            .getStructuredElementIdParamNamePattern();
    fieldMap.forEach((key, value) -> {
        if (!StringUtils.isBlank(value)) {
            Assert.assertFalse(structuredPattern.matcher(value).matches());
        }
    });

    Assert.assertEquals(body, fieldMap.get(SyslogAttributes.BODY.key()));
    Assert.assertEquals(message, event.getFullMessage());
    Assert.assertNull(event.getSender());
}

---

From source file:net.jradius.freeradius.FreeRadiusListener.java

public JRadiusEvent parseRequest(ListenerRequest listenerRequest, ByteBuffer notUsed, InputStream in)
        throws Exception {
    FreeRadiusRequest request = (FreeRadiusRequest) requestObjectPool.borrowObject();
    request.setBorrowedFromPool(requestObjectPool);

    int totalLength = (int) (RadiusFormat.readUnsignedInt(in) - 4);
    int readOffset = 0;

    ByteBuffer buffer = request.buffer_in;

    if (totalLength < 0 || totalLength > buffer.capacity()) {
        return null;
    }/*from  www  . j  av a2 s . com*/

    buffer.clear();
    byte[] payload = buffer.array();

    while (readOffset < totalLength) {
        int result = in.read(payload, readOffset, totalLength - readOffset);
        if (result < 0)
            return null;
        readOffset += result;
    }

    buffer.limit(totalLength);

    long nameLength = RadiusFormat.getUnsignedInt(buffer);

    if (nameLength < 0 || nameLength > 1024) {
        throw new RadiusException("KeepAlive rlm_jradius connection has been closed");
    }

    byte[] nameBytes = new byte[(int) nameLength];
    buffer.get(nameBytes);

    int messageType = RadiusFormat.getUnsignedByte(buffer);
    int packetCount = RadiusFormat.getUnsignedByte(buffer);

    RadiusPacket rp[] = PacketFactory.parse(buffer, packetCount);

    long length = RadiusFormat.getUnsignedInt(buffer);

    if (length > buffer.remaining()) {
        throw new RadiusException("bad length");
    }

    AttributeList configItems = new AttributeList();
    format.unpackAttributes(configItems, buffer, (int) length, true);

    request.setConfigItems(configItems);
    request.setSender(new String(nameBytes));
    request.setType(messageType);
    request.setPackets(rp);

    return request;
}

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

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

    buffer.put("Hello World".getBytes());
    buffer.flip();//from ww w  . j a v  a 2  s .  c  o m
    staging.writePrimaryStaging(buffer, "Hello World".getBytes().length);

    buffer.clear();
    staging.getPrimaryStage().read(buffer);
    Assert.assertEquals("Hello World".getBytes().length, staging.getPrimaryStageSize());
    Assert.assertEquals("Hello World", new String(buffer.array(), 0, buffer.position()));

    staging.resetPrimaryStage();
    Assert.assertEquals(0, staging.getPrimaryStageSize());
}

---

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

@Test
public void test_tempRead() {
    ByteBuffer buffer = ByteBuffer.allocate(1024);

    buffer.put("Hello World".getBytes());
    buffer.rewind();// w w  w .  j a  v  a2s .c  o  m
    staging.writeTempReadBytes(buffer);
    Assert.assertTrue(staging.hasTempReadBytes());

    buffer.clear();
    staging.readTempReadBytes(buffer);
    Assert.assertEquals("Hello World",
            new String(ArrayUtils.subarray(buffer.array(), 0, "Hello World".getBytes().length)));
    staging.resetTempReadBytes();

    Assert.assertFalse(staging.hasTempReadBytes());
}

---

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

@Test
public void test_tempWrite() {
    ByteBuffer buffer = ByteBuffer.allocate(1024);

    buffer.put("Hello World".getBytes());
    buffer.rewind();/*from  www .  j ava2  s  .  c o  m*/
    staging.writeTempWriteBytes(buffer);
    Assert.assertTrue(staging.hasTempWriteBytes());

    buffer.clear();
    staging.readTempWriteBytes(buffer);
    Assert.assertEquals("Hello World",
            new String(ArrayUtils.subarray(buffer.array(), 0, "Hello World".getBytes().length)));
    staging.resetTempWriteBytes();

    Assert.assertFalse(staging.hasTempWriteBytes());
}

---

From source file:com.zotoh.maedr.device.apache.StreamingNHttpEntity.java

private void sockItDown(ContentDecoder decoder) throws IOException {

    tlog().debug("StreamingNHttpEntity: sockItDown()");

    ByteBuffer buffer;
    int cnt;//from ww  w  .  ja  va  2  s.  c om

    buffer = _alloctor.allocate(4096);
    do {

        buffer.clear();

        if ((cnt = decoder.read(buffer)) == -1)
            break;

        if (cnt == 0) {

            if (buffer.hasRemaining())
                break;
            else
                continue;
        }

        // 
        buffer.flip();
        byte[] bits = new byte[4096];
        int len;

        while (buffer.hasRemaining()) {
            len = Math.min(4096, buffer.remaining());
            buffer.get(bits, 0, len);
            storeBytes(bits, len);
        }
    } while (true);

}

---

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

@Test
public void test_tempRead() {
    ByteBuffer buffer = ByteBuffer.allocate(1024);

    buffer.put("Hello World".getBytes());
    buffer.flip();/*from   ww w . j a va2 s  . co m*/
    staging.writeTempReadBytes(buffer);
    Assert.assertTrue(staging.hasTempReadBytes());

    buffer.clear();
    staging.readTempReadBytes(buffer);
    Assert.assertEquals("Hello World",
            new String(ArrayUtils.subarray(buffer.array(), 0, "Hello World".getBytes().length)));
    staging.resetTempReadBytes();

    Assert.assertFalse(staging.hasTempReadBytes());
}

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