oracle.pgx.api

Class FlashbackSynchronizer

java.lang.Object

oracle.pgx.api.FlashbackSynchronizer

All Implemented Interfaces:

Synchronizer

public class FlashbackSynchronizer
extends java.lang.Object
implements Synchronizer

Synchronizes a PGX graph with an Oracle Database using Flashback queries

Nested Class Summary

Nested classes/interfaces inherited from interface oracle.pgx.api.Synchronizer

Synchronizer.Builder<T extends Synchronizer>

Method Summary

Modifier and Type	Method and Description
PgxGraph	apply() Applies the changes to the underlying PGX graph.
void	fetch() Fetches the changes from the external data source.
GraphDelta	getGraphDelta() Get the description of the delta between current snapshot and the fetched changes.

Methods inherited from class java.lang.Object

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

Methods inherited from interface oracle.pgx.api.Synchronizer

sync

Method Detail

apply

public PgxGraph apply()

Description copied from interface: Synchronizer

Applies the changes to the underlying PGX graph. Require Synchronizer.fetch() to be called first.

Specified by:

apply in interface Synchronizer

Returns:

the new snapshot of the graph with the fetched changes applied.

fetch

public void fetch()
           throws java.sql.SQLException

Description copied from interface: Synchronizer

Fetches the changes from the external data source. You can call this multiple times to accumulate deltas. The deltas reset once you call Synchronizer.apply().

Specified by:

fetch in interface Synchronizer

Throws:

java.sql.SQLException

getGraphDelta

public GraphDelta getGraphDelta()

Description copied from interface: Synchronizer

Get the description of the delta between current snapshot and the fetched changes. Can be used to make a decision for when to apply the delta.

Specified by:

getGraphDelta in interface Synchronizer

Returns:

the description of the delta.