Package com.espertech.esper.common.internal.view.lengthbatch

Class LengthBatchViewRStream

java.lang.Object

com.espertech.esper.common.internal.view.core.ViewSupport

com.espertech.esper.common.internal.view.lengthbatch.LengthBatchViewRStream

All Implemented Interfaces:

DataWindowView, View, Viewable, ViewDataVisitable, Iterable<EventBean>

public class LengthBatchViewRStream
extends ViewSupport
implements DataWindowView

Same as the LengthBatchView, this view also supports fast-remove from the batch for remove stream events.

Field Summary

Fields

Modifier and Type	Field	Description
protected final AgentInstanceContext	agentInstanceContext
protected LinkedHashSet<EventBean>	currentBatch
protected LinkedHashSet<EventBean>	lastBatch

Fields inherited from class com.espertech.esper.common.internal.view.core.ViewSupport

child, parent

Fields inherited from interface com.espertech.esper.common.internal.view.core.Viewable

EPTYPE

Constructor Summary

Constructors

Constructor	Description
LengthBatchViewRStream(AgentInstanceViewFactoryChainContext agentInstanceViewFactoryContext, LengthBatchViewFactory lengthBatchViewFactory, int size)	Constructor.

Method Summary

Modifier and Type	Method	Description
final EventType	getEventType()	Provides metadata information about the type of object the event collection contains.
final int	getSize()	Returns the number of events to batch (data window size).
ViewFactory	getViewFactory()
void	internalHandleRemoved(EventBean oldData)
boolean	isEmpty()	Returns true if the window is empty, or false if not empty.
final Iterator<EventBean>	iterator()	Allows iteration through all elements in this viewable.
protected void	sendBatch()	This method updates child views and clears the batch of events.
final String	toString()
void	update(EventBean[] newData, EventBean[] oldData)	Notify that data has been added or removed from the Viewable parent.
void	visitView(ViewDataVisitor viewDataVisitor)

Methods inherited from class com.espertech.esper.common.internal.view.core.ViewSupport

getChild, getParent, setChild, setParent

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface com.espertech.esper.common.internal.view.core.View

getParent, setParent

Methods inherited from interface com.espertech.esper.common.internal.view.core.Viewable

getChild, setChild

Field Details

agentInstanceContext

protected final AgentInstanceContext agentInstanceContext

lastBatch

protected LinkedHashSet<EventBean> lastBatch

currentBatch

protected LinkedHashSet<EventBean> currentBatch

Constructor Details

LengthBatchViewRStream

public LengthBatchViewRStream(AgentInstanceViewFactoryChainContext agentInstanceViewFactoryContext,
 LengthBatchViewFactory lengthBatchViewFactory,
 int size)

Constructor.

Parameters:

size - is the number of events to batch

lengthBatchViewFactory - for copying this view in a group-by

agentInstanceViewFactoryContext - context

Method Details

getSize

public final int getSize()

Returns the number of events to batch (data window size).

Returns:

batch size

getEventType

public final EventType getEventType()

Description copied from interface: Viewable

Provides metadata information about the type of object the event collection contains.

Specified by:

getEventType in interface Viewable

Returns:

metadata for the objects in the collection

internalHandleRemoved

public void internalHandleRemoved(EventBean oldData)

update

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

Description copied from interface: View

Notify that data has been added or removed from the Viewable parent. The last object in the newData array of objects would be the newest object added to the parent view. The first object of the oldData array of objects would be the oldest object removed from the parent view.

If the call to update contains new (inserted) data, then the first argument will be a non-empty list and the second will be empty. Similarly, if the call is a notification of deleted data, then the first argument will be empty and the second will be non-empty. Either the newData or oldData will be non-null. This method won't be called with both arguments being null, but either one could be null. The same is true for zero-length arrays. Either newData or oldData will be non-empty. If both are non-empty, then the update is a modification notification.

When update() is called on a view by the parent object, the data in newData will be in the collection of the parent, and its data structures will be arranged to reflect that. The data in oldData will not be in the parent's data structures, and any access to the parent will indicate that that data is no longer there.

Specified by:

update in interface View

Parameters:

newData - is the new data that has been added to the parent view

oldData - is the old data that has been removed from the parent view

sendBatch

protected void sendBatch()

This method updates child views and clears the batch of events.

isEmpty

public boolean isEmpty()

Returns true if the window is empty, or false if not empty.

Returns:

true if empty

iterator

public final Iterator<EventBean> iterator()

Description copied from interface: Viewable

Allows iteration through all elements in this viewable. The iterator will return the elements in the collection in their natural order, or, if there is no natural ordering, in some unpredictable order.

Specified by:

iterator in interface Iterable<EventBean>

Specified by:

iterator in interface Viewable

Returns:

an iterator which will go through all current elements in the collection.

toString

public final String toString()

Overrides:

toString in class Object

visitView

public void visitView(ViewDataVisitor viewDataVisitor)

Specified by:

visitView in interface ViewDataVisitable

getViewFactory

public ViewFactory getViewFactory()