Package io.deephaven.engine.table.impl

Class OperationSnapshotControlEx

java.lang.Object

io.deephaven.engine.table.impl.OperationSnapshotControl

io.deephaven.engine.table.impl.OperationSnapshotControlEx

All Implemented Interfaces:

ConstructSnapshot.SnapshotCompletedConsistently, ConstructSnapshot.SnapshotConsistent, ConstructSnapshot.SnapshotControl, ConstructSnapshot.UsePreviousValues

public final class OperationSnapshotControlEx
extends OperationSnapshotControl

Variant of OperationSnapshotControl that considers "extra" dependencies in addition to the source BaseTable when determining whether to use previous values during initialization or evaluating success. This is useful anytime an operation needs to listen to and snapshot one data source while also snapshotting others.

Constructor Summary

Constructors

Constructor	Description
OperationSnapshotControlEx(@NotNull BaseTable<?> sourceTable, @NotNull NotificationQueue.Dependency... extras)

Method Summary

Modifier and Type	Method	Description
Boolean	usePreviousValues(long beforeClockValue)	Starts a snapshot.

Methods inherited from class io.deephaven.engine.table.impl.OperationSnapshotControl

getUpdateGraph, isInInitialNotificationWindow, setListenerAndResult, snapshotCompletedConsistently, snapshotConsistent

Methods inherited from class java.lang.Object

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

Constructor Details

OperationSnapshotControlEx

public OperationSnapshotControlEx(@NotNull
 @NotNull BaseTable<?> sourceTable,
 @NotNull
 @NotNull NotificationQueue.Dependency... extras)

Method Details

usePreviousValues

public Boolean usePreviousValues(long beforeClockValue)

Description copied from class: OperationSnapshotControl

Starts a snapshot.

Specified by:

usePreviousValues in interface ConstructSnapshot.UsePreviousValues

Overrides:

usePreviousValues in class OperationSnapshotControl

Parameters:

beforeClockValue - the logical clock value we are starting a snapshot on

Returns:

true if we should use previous values, false if we should use current values.