com.espertech.esper.core.service

Class UpdateDispatchViewBase

java.lang.Object

com.espertech.esper.view.ViewSupport

com.espertech.esper.core.service.UpdateDispatchViewBase

All Implemented Interfaces:

UpdateDispatchView, Dispatchable, EventCollection, View, Viewable, Iterable<EventBean>

Direct Known Subclasses:

UpdateDispatchViewBlockingSpin, UpdateDispatchViewBlockingWait, UpdateDispatchViewNonBlocking

public abstract class UpdateDispatchViewBase
extends ViewSupport
implements Dispatchable, UpdateDispatchView

Convenience view for dispatching view updates received from a parent view to update listeners via the dispatch service.

Field Summary

Fields

Modifier and Type	Field and Description
protected DispatchService	dispatchService Dispatches events to listeners.
protected ThreadLocal<Boolean>	isDispatchWaiting Flag to indicate we have registered a dispatch.
protected EventBean	lastIterableEvent For iteration with patterns.
protected StatementResultService	statementResultService Handles result delivery

Fields inherited from class com.espertech.esper.view.ViewSupport

EMPTY_VIEW_ARRAY, parent

Constructor Summary

Constructors

Constructor and Description
UpdateDispatchViewBase(StatementResultService statementResultServiceImpl, DispatchService dispatchService) Ctor.

Method Summary

Modifier and Type	Method and Description
void	clear() Remove event reference to last event.
void	execute() Execute dispatch.
EventType	getEventType() Provides metadata information about the type of object the event collection contains.
StatementResultService	getStatementResultService()
Iterator<EventBean>	iterator() Allows iteration through all elements in this event collection.

Methods inherited from class com.espertech.esper.view.ViewSupport

addView, addView, dumpChildViews, dumpUpdateParams, dumpUpdateParams, findDescendent, findViewIndex, getParent, getViews, hasViews, removeAllViews, removeView, removeView, setParent, updateChildren, updateChildren

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.core.service.UpdateDispatchView

newResult

Methods inherited from interface com.espertech.esper.view.View

getParent, setParent, update

Methods inherited from interface com.espertech.esper.view.Viewable

addView, getViews, hasViews, removeAllViews, removeView

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

statementResultService

protected final StatementResultService statementResultService

Handles result delivery

dispatchService

protected final DispatchService dispatchService

Dispatches events to listeners.

lastIterableEvent

protected EventBean lastIterableEvent

For iteration with patterns.

isDispatchWaiting

protected ThreadLocal<Boolean> isDispatchWaiting

Flag to indicate we have registered a dispatch.

Constructor Detail

UpdateDispatchViewBase

public UpdateDispatchViewBase(StatementResultService statementResultServiceImpl,
                              DispatchService dispatchService)

Ctor.

Parameters:

dispatchService - - for performing the dispatch

statementResultServiceImpl - - handles result delivery

Method Detail

getEventType

public EventType getEventType()

Description copied from interface: EventCollection

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

Specified by:

getEventType in interface EventCollection

Returns:

metadata for the objects in the collection

iterator

public Iterator<EventBean> iterator()

Description copied from interface: EventCollection

Allows iteration through all elements in this event collection. 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 EventCollection

Specified by:

iterator in interface Iterable<EventBean>

Returns:

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

execute

public void execute()

Description copied from interface: Dispatchable

Execute dispatch.

Specified by:

execute in interface Dispatchable

clear

public void clear()

Remove event reference to last event.

getStatementResultService

public StatementResultService getStatementResultService()