Package org.apache.flink.runtime.state

Class StreamCompressionDecorator

java.lang.Object

org.apache.flink.runtime.state.StreamCompressionDecorator

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

SnappyStreamCompressionDecorator, UncompressedStreamCompressionDecorator

@Internal
public abstract class StreamCompressionDecorator
extends Object
implements Serializable

Implementations of this interface decorate streams with a compression scheme. Subclasses should be stateless.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
StreamCompressionDecorator()

Method Summary

Modifier and Type	Method	Description
final InputStream	decorateWithCompression(InputStream stream)	IMPORTANT: For streams returned by this method, InputStream.close() is not propagated to the inner stream.
final OutputStream	decorateWithCompression(OutputStream stream)	Decorates the stream by wrapping it into a stream that applies a compression.
protected abstract InputStream	decorateWithCompression(NonClosingInputStreamDecorator stream)
protected abstract OutputStream	decorateWithCompression(NonClosingOutputStreamDecorator stream)

Methods inherited from class java.lang.Object

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

Constructor Details

StreamCompressionDecorator

public StreamCompressionDecorator()

Method Details

decorateWithCompression

public final OutputStream decorateWithCompression(OutputStream stream)
                                           throws IOException

Decorates the stream by wrapping it into a stream that applies a compression.

IMPORTANT: For streams returned by this method, OutputStream.close() is not propagated to the inner stream. The inner stream must be closed separately.

Parameters:

stream - the stream to decorate.

Returns:

an output stream that is decorated by the compression scheme.

Throws:

IOException

decorateWithCompression

public final InputStream decorateWithCompression(InputStream stream)
                                          throws IOException

IMPORTANT: For streams returned by this method, InputStream.close() is not propagated to the inner stream. The inner stream must be closed separately.

Parameters:

stream - the stream to decorate.

Returns:

an input stream that is decorated by the compression scheme.

Throws:

IOException

decorateWithCompression

protected abstract OutputStream decorateWithCompression(NonClosingOutputStreamDecorator stream)
                                                 throws IOException

Parameters:

stream - the stream to decorate

Returns:

an output stream that is decorated by the compression scheme.

Throws:

IOException

decorateWithCompression

protected abstract InputStream decorateWithCompression(NonClosingInputStreamDecorator stream)
                                                throws IOException

Parameters:

stream - the stream to decorate.

Returns:

an input stream that is decorated by the compression scheme.

Throws:

IOException