Field Detail

• LOG

  private static final org.apache.commons.logging.Log LOG

• DEFAULT_BUFFER_SIZE

  static final int DEFAULT_BUFFER_SIZE

  See Also:

  Constant Field Values

• buffers

  private ByteBuffer[] buffers

• locks

  private Lock[] locks

• bufferSize

  private int bufferSize

• bufferCount

  private int bufferCount

• GET_MULTIPLE_VISTOR

  private static final ByteBufferArray.Visitor GET_MULTIPLE_VISTOR

• PUT_MULTIPLE_VISITOR

  private static final ByteBufferArray.Visitor PUT_MULTIPLE_VISITOR

Constructor Detail

• ByteBufferArray

  public ByteBufferArray(long capacity,
                 boolean directByteBuffer)

  We allocate a number of byte buffers as the capacity. In order not to out of the array bounds for the last byte(see multiple(long, int, byte[], int, org.apache.hadoop.hbase.util.ByteBufferArray.Visitor)), we will allocate one additional buffer with capacity 0;

  Parameters:

  capacity - total size of the byte buffer array

  directByteBuffer - true if we allocate direct buffer

Method Detail

• roundUp

  private long roundUp(long n,
             long to)

• getMultiple

  public int getMultiple(long start,
                int len,
                byte[] dstArray)

  Transfers bytes from this buffer array into the given destination array

  Parameters:

  start - start position in the ByteBufferArray

  len - The maximum number of bytes to be written to the given array

  dstArray - The array into which bytes are to be written

  Returns:

  number of bytes read

• getMultiple

  public int getMultiple(long start,
                int len,
                byte[] dstArray,
                int dstOffset)

  Transfers bytes from this buffer array into the given destination array

  Parameters:

  start - start offset of this buffer array

  len - The maximum number of bytes to be written to the given array

  dstArray - The array into which bytes are to be written

  dstOffset - The offset within the given array of the first byte to be written

  Returns:

  number of bytes read

• putMultiple

  public void putMultiple(long start,
                 int len,
                 byte[] srcArray)

  Transfers bytes from the given source array into this buffer array

  Parameters:

  start - start offset of this buffer array

  len - The maximum number of bytes to be read from the given array

  srcArray - The array from which bytes are to be read

• putMultiple

  public void putMultiple(long start,
                 int len,
                 byte[] srcArray,
                 int srcOffset)

  Transfers bytes from the given source array into this buffer array

  Parameters:

  start - start offset of this buffer array

  len - The maximum number of bytes to be read from the given array

  srcArray - The array from which bytes are to be read

  srcOffset - The offset within the given array of the first byte to be read

• multiple

  void multiple(long start,
              int len,
              byte[] array,
              int arrayOffset,
              ByteBufferArray.Visitor visitor)

  Access(read or write) this buffer array with a position and length as the given array. Here we will only lock one buffer even if it may be need visit several buffers. The consistency is guaranteed by the caller.

  Parameters:

  start - start offset of this buffer array

  len - The maximum number of bytes to be accessed

  array - The array from/to which bytes are to be read/written

  arrayOffset - The offset within the given array of the first byte to be read or written

  visitor - implement of how to visit the byte buffer