Package org.apache.cassandra.io.util

Class DataOutputBuffer

  • All Implemented Interfaces:
    java.io.Closeable, java.io.DataOutput, java.io.Flushable, java.lang.AutoCloseable, DataOutputPlus
    Direct Known Subclasses:
    DataOutputBufferFixed, SafeMemoryWriter
    public class DataOutputBuffer
extends BufferedDataOutputStreamPlus
    An implementation of the DataOutputStream interface using a FastByteArrayOutputStream and exposing its buffer so copies can be avoided. This class is completely thread unsafe.

    • Field Detail

      • scratchBuffer

        public static final io.netty.util.concurrent.FastThreadLocal<DataOutputBuffer> scratchBuffer
        Scratch buffers used mostly for serializing in memory. It's important to call #recycle() when finished to keep the memory overhead from being too large in the system.

    • Constructor Detail

      • DataOutputBuffer

        public DataOutputBuffer()

      • DataOutputBuffer

        public DataOutputBuffer​(int size)

      • DataOutputBuffer

        public DataOutputBuffer​(java.nio.ByteBuffer buffer)

    • Method Detail

      • expandToFit

        protected void expandToFit​(long count)

      • clear

        public void clear()

      • close

        public void close()
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Overrides:
        close in class BufferedDataOutputStreamPlus

      • buffer

        public java.nio.ByteBuffer buffer()

      • buffer

        public java.nio.ByteBuffer buffer​(boolean duplicate)

      • getData

        public byte[] getData()

      • getLength

        public int getLength()

      • hasPosition

        public boolean hasPosition()
        Description copied from interface: DataOutputPlus
        If the implementation supports providing a position, this method returns true, otherwise false.

      • position

        public long position()
        Description copied from interface: DataOutputPlus
        Returns the current position of the underlying target like a file-pointer or the position withing a buffer. Not every implementation may support this functionality. Whether or not this functionality is supported can be checked via the DataOutputPlus.hasPosition().

      • asNewBuffer

        public java.nio.ByteBuffer asNewBuffer()

      • toByteArray

        public byte[] toByteArray()