com.espertech.esper.view.internal
Class PriorEventBufferUnbound

java.lang.Object
  com.espertech.esper.view.internal.PriorEventBufferUnbound

All Implemented Interfaces:

ViewUpdatedCollection, RandomAccessByIndex

public class PriorEventBufferUnbound
extends java.lang.Object
implements ViewUpdatedCollection, RandomAccessByIndex

Buffer class for insert stream events only for use with unbound streams that inserts data only, to serve up one or more prior events in the insert stream based on an index.

Does not expect or care about the remove stream and simple keeps a rolling buffer of new data events up to the maximum prior event we are asking for.

Constructor Summary

PriorEventBufferUnbound(int maxPriorIndex)
Ctor.

Method Summary

void	destroy() De-allocate resources held by the collection.
EventBean	getNewData(int index) Returns an new data event given an index.
EventBean	getNewDataTail(int index)
RollingEventBuffer	getNewEvents()
int	getNumEventsInsertBuf()
EventBean	getOldData(int index) Returns an old data event given an index.
java.util.Collection<EventBean>	getWindowCollectionReadOnly()
int	getWindowCount()
java.util.Iterator<EventBean>	getWindowIterator()
void	update(EventBean[] newData, EventBean[] oldData) Accepts view insert and remove stream.

Methods inherited from class java.lang.Object

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

Constructor Detail

PriorEventBufferUnbound

public PriorEventBufferUnbound(int maxPriorIndex)

Ctor.

Parameters:

maxPriorIndex - is the highest prior-event index required by any expression

Method Detail

update

public void update(EventBean[] newData,
                   EventBean[] oldData)

Description copied from interface: ViewUpdatedCollection

Accepts view insert and remove stream.

Specified by:

update in interface ViewUpdatedCollection

Parameters:

newData - is the insert stream events or null if no data

oldData - is the remove stream events or null if no data

getNewData

public EventBean getNewData(int index)

Description copied from interface: RandomAccessByIndex

Returns an new data event given an index.

Specified by:

getNewData in interface RandomAccessByIndex

Parameters:

index - to return new data for

Returns:

new data event

getOldData

public EventBean getOldData(int index)

Description copied from interface: RandomAccessByIndex

Returns an old data event given an index.

Specified by:

getOldData in interface RandomAccessByIndex

Parameters:

index - to return old data for

Returns:

old data event

destroy

public void destroy()

Description copied from interface: ViewUpdatedCollection

De-allocate resources held by the collection.

Specified by:

destroy in interface ViewUpdatedCollection

getNewDataTail

public EventBean getNewDataTail(int index)

Specified by:

getNewDataTail in interface RandomAccessByIndex

getWindowIterator

public java.util.Iterator<EventBean> getWindowIterator()

Specified by:

getWindowIterator in interface RandomAccessByIndex

getWindowCollectionReadOnly

public java.util.Collection<EventBean> getWindowCollectionReadOnly()

Specified by:

getWindowCollectionReadOnly in interface RandomAccessByIndex

getWindowCount

public int getWindowCount()

Specified by:

getWindowCount in interface RandomAccessByIndex

getNewEvents

public RollingEventBuffer getNewEvents()

getNumEventsInsertBuf

public int getNumEventsInsertBuf()

Specified by:

getNumEventsInsertBuf in interface ViewUpdatedCollection