oracle.pgx.api

Interface Synchronizer

All Known Implementing Classes:

FlashbackSynchronizer

public interface Synchronizer

Synchronizes changes in an external data source with a PGX graph.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Synchronizer.Builder<T extends Synchronizer> Builder class for Synchronizer objects.

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.
default PgxGraph	sync() Synchronize changes from the external data source.

Method Detail

apply

PgxGraph apply()

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

Returns:

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

fetch

void fetch()
    throws java.sql.SQLException

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

Throws:

java.sql.SQLException

getGraphDelta

GraphDelta getGraphDelta()

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.

Returns:

the description of the delta.

sync

default PgxGraph sync()
               throws java.sql.SQLException

Synchronize changes from the external data source. By default, this calls fetch() followed by apply()

Returns:

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

Throws:

java.sql.SQLException