Package org.apache.flink.runtime.io.network.buffer

Class BufferDecompressor

java.lang.Object

org.apache.flink.runtime.io.network.buffer.BufferDecompressor

public class BufferDecompressor
extends Object

Decompressor for compressed Buffer.

Constructor Summary

Constructors

Constructor	Description
BufferDecompressor(int bufferSize, org.apache.flink.configuration.NettyShuffleEnvironmentOptions.CompressionCodec factoryName)

Method Summary

Modifier and Type	Method	Description
Buffer	decompressToIntermediateBuffer(Buffer buffer)	Decompresses the given Buffer using BlockDecompressor.
Buffer	decompressToOriginalBuffer(Buffer buffer)	The difference between this method and decompressToIntermediateBuffer(Buffer) is that this method copies the decompressed data to the input Buffer starting from offset 0.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BufferDecompressor

public BufferDecompressor(int bufferSize,
                          org.apache.flink.configuration.NettyShuffleEnvironmentOptions.CompressionCodec factoryName)

Method Detail

decompressToIntermediateBuffer

public Buffer decompressToIntermediateBuffer(Buffer buffer)

Decompresses the given Buffer using BlockDecompressor. The decompressed data will be stored in the intermediate buffer of this BufferDecompressor and returned to the caller. The caller must guarantee that the returned Buffer has been freed when calling the method next time.

Notes that the decompression will always start from offset 0 to the size of the input Buffer.

decompressToOriginalBuffer

@VisibleForTesting
public Buffer decompressToOriginalBuffer(Buffer buffer)

The difference between this method and decompressToIntermediateBuffer(Buffer) is that this method copies the decompressed data to the input Buffer starting from offset 0.

The caller must guarantee that the input Buffer is writable and there's enough space left.