org.apache.flink.streaming.runtime.operators.windowing.buffers

Class ListWindowBuffer<T>

java.lang.Object

org.apache.flink.streaming.runtime.operators.windowing.buffers.ListWindowBuffer<T>

Type Parameters:

T - The type of elements that this WindowBuffer can store.

All Implemented Interfaces:

EvictingWindowBuffer<T,T>, WindowBuffer<T,T>

@Internal
public class ListWindowBuffer<T>
extends Object
implements EvictingWindowBuffer<T,T>

An EvictingWindowBuffer that stores elements on the Java Heap.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ListWindowBuffer.Factory<T>

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ListWindowBuffer(ArrayDeque<StreamRecord<T>> elements, TypeSerializer<T> serializer)
protected	ListWindowBuffer(TypeSerializer<T> serializer)

Method Summary

Modifier and Type	Method and Description
Iterable<StreamRecord<T>>	getElements() Returns all elements that are currently in the buffer.
Iterable<T>	getUnpackedElements() Returns all elements that are currently in the buffer.
void	removeElements(int count) Removes the given number of elements, starting from the beginning.
int	size() Returns the number of elements that are currently in the buffer.
void	snapshot(DataOutputView out) Writes the contents of the window buffer to a DataOutputView for checkpointing.
void	storeElement(StreamRecord<T> element) Adds the element to the buffer.

Methods inherited from class java.lang.Object

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

Constructor Detail

ListWindowBuffer

protected ListWindowBuffer(TypeSerializer<T> serializer)

ListWindowBuffer

protected ListWindowBuffer(ArrayDeque<StreamRecord<T>> elements,
                           TypeSerializer<T> serializer)

Method Detail

storeElement

public void storeElement(StreamRecord<T> element)

Description copied from interface: WindowBuffer

Adds the element to the buffer.

Specified by:

storeElement in interface WindowBuffer<T,T>

Parameters:

element - The element to add.

removeElements

public void removeElements(int count)

Description copied from interface: EvictingWindowBuffer

Removes the given number of elements, starting from the beginning.

Specified by:

removeElements in interface EvictingWindowBuffer<T,T>

Parameters:

count - The number of elements to remove.

getElements

public Iterable<StreamRecord<T>> getElements()

Description copied from interface: WindowBuffer

Returns all elements that are currently in the buffer.

Specified by:

getElements in interface WindowBuffer<T,T>

getUnpackedElements

public Iterable<T> getUnpackedElements()

Description copied from interface: WindowBuffer

Returns all elements that are currently in the buffer. This will unwrap the contained elements from their StreamRecord.

Specified by:

getUnpackedElements in interface WindowBuffer<T,T>

size

public int size()

Description copied from interface: WindowBuffer

Returns the number of elements that are currently in the buffer.

Specified by:

size in interface WindowBuffer<T,T>

snapshot

public void snapshot(DataOutputView out)
              throws IOException

Description copied from interface: WindowBuffer

Writes the contents of the window buffer to a DataOutputView for checkpointing.

Specified by:

snapshot in interface WindowBuffer<T,T>

Throws:

IOException