org.apache.flink.runtime.state

Class NonClosingCheckpointOutputStream<T extends StreamStateHandle>

java.lang.Object

java.io.OutputStream

org.apache.flink.runtime.state.NonClosingCheckpointOutputStream<T>

Type Parameters:

T - type of the returned state handle.

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

Direct Known Subclasses:

KeyedStateCheckpointOutputStream, OperatorStateCheckpointOutputStream

public abstract class NonClosingCheckpointOutputStream<T extends StreamStateHandle>
extends OutputStream

Abstract class to implement custom checkpoint output streams which should not be closable for user code.

Field Summary

Fields

Modifier and Type	Field and Description
protected CheckpointStateOutputStream	delegate

Constructor Summary

Constructors

Constructor and Description
NonClosingCheckpointOutputStream(CheckpointStateOutputStream delegate)

Method Summary

Modifier and Type	Method and Description
ResourceGuard.Lease	acquireLease() Returns a ResourceGuard.Lease that prevents closing this stream.
void	close()
void	flush()
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)

Methods inherited from class java.lang.Object

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

Field Detail

delegate

protected final CheckpointStateOutputStream delegate

Constructor Detail

NonClosingCheckpointOutputStream

public NonClosingCheckpointOutputStream(CheckpointStateOutputStream delegate)

Method Detail

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException

write

public void write(int b)
           throws IOException

Specified by:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] b)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Overrides:

write in class OutputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class OutputStream

Throws:

IOException

acquireLease

public final ResourceGuard.Lease acquireLease()
                                       throws IOException

Returns a ResourceGuard.Lease that prevents closing this stream. To allow the system to close this stream, each of the acquired leases need to call ResourceGuard.Lease.close(), on their acquired leases.

Throws:

IOException