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java.lang.Objectcom.espertech.esper.view.ViewSupport
com.espertech.esper.epl.named.NamedWindowRootView
public class NamedWindowRootView
The root window in a named window plays multiple roles: It holds the indexes for deleting rows, if any on-delete statement requires such indexes. Such indexes are updated when events arrive, or remove from when a data window or on-delete statement expires events. The view keeps track of on-delete statements their indexes used.
Field Summary |
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Fields inherited from class com.espertech.esper.view.ViewSupport |
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parent |
Constructor Summary | |
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NamedWindowRootView()
Ctor. |
Method Summary | |
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NamedWindowOnExprBaseView |
addOnExpr(OnTriggerDesc onTriggerDesc,
ExprNode joinExpr,
EventType filterEventType,
StatementStopService statementStopService,
InternalEventRouter internalEventRouter,
ResultSetProcessor resultSetProcessor,
EPStatementHandle statementHandle,
StatementResultService statementResultService)
Add an on-trigger view that, using a lookup strategy, looks up from the named window and may select or delete rows. |
void |
destroy()
Destroy and clear resources. |
EventType |
getEventType()
Provides metadata information about the type of object the event collection contains. |
Iterator<EventBean> |
iterator()
Allows iteration through all elements in this event collection. |
void |
removeOldData(EventBean[] oldData)
Called by tail view to indicate that the data window view exired events that must be removed from index tables. |
void |
removeOnExpr(LookupStrategy strategy)
Unregister an on-delete statement view, using the strategy as a key to remove a reference to the index table used by the strategy. |
void |
setDataWindowContents(Iterable<EventBean> dataWindowContents)
Sets the iterator to use to obtain current named window data window contents. |
void |
setParent(Viewable parent)
Called when the View is added to a Viewable object. |
void |
update(EventBean[] newData,
EventBean[] oldData)
Notify that data has been added or removed from the Viewable parent. |
Methods inherited from class com.espertech.esper.view.ViewSupport |
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addView, dumpChildViews, dumpUpdateParams, dumpUpdateParams, findDescendent, getParent, getViews, hasViews, removeView, updateChildren, updateChildren |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public NamedWindowRootView()
Method Detail |
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public void setDataWindowContents(Iterable<EventBean> dataWindowContents)
dataWindowContents
- iterator over events help by named windowpublic void removeOldData(EventBean[] oldData)
oldData
- removed stream of the data windowpublic void update(EventBean[] newData, EventBean[] oldData)
View
newData
- is the new data that has been added to the parent viewoldData
- is the old data that has been removed from the parent viewpublic NamedWindowOnExprBaseView addOnExpr(OnTriggerDesc onTriggerDesc, ExprNode joinExpr, EventType filterEventType, StatementStopService statementStopService, InternalEventRouter internalEventRouter, ResultSetProcessor resultSetProcessor, EPStatementHandle statementHandle, StatementResultService statementResultService)
onTriggerDesc
- the specification for the on-deletefilterEventType
- the event type for the on-clause in the on-deletestatementStopService
- for stopping the statementinternalEventRouter
- for insert-into behaviorresultSetProcessor
- @return view representing the on-delete view chain, posting delete events to it's listenersstatementHandle
- is the handle to the statement, used for routing/insert-intojoinExpr
- is the join expression or null if there is nonestatementResultService
- for coordinating on whether insert and remove stream events should be posted
public void removeOnExpr(LookupStrategy strategy)
strategy
- to use for deleting eventspublic void setParent(Viewable parent)
View
setParent
in interface View
setParent
in class ViewSupport
parent
- is the parent that this view is a child ofpublic EventType getEventType()
EventCollection
public Iterator<EventBean> iterator()
EventCollection
public void destroy()
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© 2007 EsperTech Inc. All rights reserved. Visit us at espertech.com |
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