Package com.espertech.esper.common.internal.epl.namedwindow.core

Class NamedWindowRootViewInstance

java.lang.Object
com.espertech.esper.common.internal.view.core.ViewSupport
com.espertech.esper.common.internal.epl.namedwindow.core.NamedWindowRootViewInstance
All Implemented Interfaces:
View, Viewable, Iterable<EventBean>
public class NamedWindowRootViewInstance extends ViewSupport
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.

  • Constructor Details

  • Method Details

    • getAgentInstanceContext

      public AgentInstanceContext getAgentInstanceContext()

    • getIndexes

      public IndexMultiKey[] getIndexes()

    • getDataWindowContents

      public Iterable<EventBean> getDataWindowContents()

    • setDataWindowContents

      public void setDataWindowContents(Iterable<EventBean> dataWindowContents)
      Sets the iterator to use to obtain current named window data window contents.
      Parameters:
      dataWindowContents - iterator over events help by named window

    • removeOldData

      public void removeOldData(EventBean[] oldData)
      Called by tail view to indicate that the data window view exired events that must be removed from index tables.
      Parameters:
      oldData - removed stream of the data window

    • addNewData

      public void addNewData(EventBean[] newData)
      Called by tail view to indicate that the data window view has new events that must be added to index tables.
      Parameters:
      newData - new event

    • 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.

      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

    • setParent

      public void setParent(Viewable parent)
      Description copied from interface: View
      Called when the View is added to a Viewable object.
      Specified by:
      setParent in interface View
      Overrides:
      setParent in class ViewSupport
      Parameters:
      parent - is the parent that this view is a child of

    • getEventType

      public EventType getEventType()
      Description copied from interface: Viewable
      Provides metadata information about the type of object the event collection contains.
      Returns:
      metadata for the objects in the collection

    • iterator

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

    • destroy

      public void destroy()
      Destroy and clear resources.

    • snapshot

      public Collection<EventBean> snapshot(QueryGraph queryGraph, Annotation[] annotations)
      Return a snapshot using index lookup filters.
      Parameters:
      annotations - annotations
      queryGraph - query graph
      Returns:
      events

    • addExplicitIndex

      public void addExplicitIndex(String explicitIndexName, String explicitIndexModuleName, QueryPlanIndexItem explicitIndexDesc, boolean isRecoveringResilient) throws ExprValidationException
      Add an explicit index.
      Parameters:
      explicitIndexDesc - index descriptor
      explicitIndexModuleName - module name
      isRecoveringResilient - indicator for recovering
      explicitIndexName - index name
      Throws:
      ExprValidationException - if the index fails to be valid

    • visitIndexes

      public void visitIndexes(EventTableVisitor visitor)

    • isParentBatchWindow

      public boolean isParentBatchWindow()

    • getIndexRepository

      public EventTableIndexRepository getIndexRepository()

    • isVirtualDataWindow

      public boolean isVirtualDataWindow()

    • getVirtualDataWindow

      public VirtualDWView getVirtualDataWindow()

    • clearDeliveriesRemoveStream

      public void clearDeliveriesRemoveStream(EventBean[] removedEvents)