Package io.deephaven.engine.table.impl.remote

Interface ConstructSnapshot.SnapshotCompletedConsistently

All Known Subinterfaces:

ConstructSnapshot.SnapshotControl

All Known Implementing Classes:

ConstructSnapshot.StaticSnapshotControl, OperationSnapshotControl, OperationSnapshotControlEx

Enclosing class:

ConstructSnapshot

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public static interface ConstructSnapshot.SnapshotCompletedConsistently

Interface for snapshotCompletedConsistently(long, boolean).

Method Summary

Modifier and Type	Method	Description
boolean	snapshotCompletedConsistently(long afterClockValue, boolean usedPreviousValues)	Determine if a snapshot was consistent according to the clock cycle.

Method Details

snapshotCompletedConsistently

boolean snapshotCompletedConsistently(long afterClockValue,
 boolean usedPreviousValues)

Determine if a snapshot was consistent according to the clock cycle. Intended to be paired with a ConstructSnapshot.UsePreviousValues function.

Can assume as a precondition that the clock step has not been observed to change since the last time the associated ConstructSnapshot.UsePreviousValues.usePreviousValues(long) was invoked, and that the clock state has not been observed to change if previous values were used. See ConstructSnapshot.clockConsistent(long, long, boolean).

Will be called at most once per snapshot attempt. Will be called for all possibly-successful snapshot attempts. May be called after unsuccessful concurrent snapshot attempts.

Parameters:

afterClockValue - The current clock value after the snapshot function was invoked

usedPreviousValues - If previous values were used

Returns:

Whether the snapshot is provably consistent

Throws:

RuntimeException - If the snapshot was consistent but the snapshot function failed to satisfy this function's expectations; this will be treated as a failure of the snapshot function