org.springframework.webflow.execution.repository.impl

Interface FlowExecutionSnapshotGroup

public interface FlowExecutionSnapshotGroup

A group of flow execution snapshots. A SPI interface that encapsulates the storage management for a group of flow execution snapshots.

Author:

Keith Donald

Method Summary

Methods

Modifier and Type	Method and Description
void	addSnapshot(Serializable snapshotId, FlowExecutionSnapshot snapshot) Add a flow execution snapshot with given id to this group.
FlowExecutionSnapshot	getSnapshot(Serializable snapshotId) Returns the snapshot with the provided id, or null if no such snapshot exists with that id.
int	getSnapshotCount() Returns the count of snapshots in this group.
Serializable	nextSnapshotId() Gets the next snapshot id for new snapshot to add to this group.
void	removeAllSnapshots() Remove all snapshots in this group.
void	removeSnapshot(Serializable snapshotId) Remove the snapshot with the given id.
void	updateSnapshot(Serializable snapshotId, FlowExecutionSnapshot snapshot) Update the snapshot with the given id.

Method Detail

getSnapshot

FlowExecutionSnapshot getSnapshot(Serializable snapshotId)
                                  throws SnapshotNotFoundException

Returns the snapshot with the provided id, or null if no such snapshot exists with that id.

Parameters:

snapshotId - the snapshot id

Returns:

the continuation

Throws:

SnapshotNotFoundException - if the id does not match a continuation in this group

addSnapshot

void addSnapshot(Serializable snapshotId,
               FlowExecutionSnapshot snapshot)

Add a flow execution snapshot with given id to this group.

Parameters:

snapshotId - the snapshot id

snapshot - the snapshot

updateSnapshot

void updateSnapshot(Serializable snapshotId,
                  FlowExecutionSnapshot snapshot)

Update the snapshot with the given id. Does nothing if no snapshot has been added with the id provided.

Parameters:

snapshotId - the snapshot id

snapshot - the new snapshot

removeSnapshot

void removeSnapshot(Serializable snapshotId)

Remove the snapshot with the given id. Does nothing if no snapshot has been added with the id provided.

Parameters:

snapshotId - the continuation id

removeAllSnapshots

void removeAllSnapshots()

Remove all snapshots in this group. Does nothing if no snapshots have been added to this group.

getSnapshotCount

int getSnapshotCount()

Returns the count of snapshots in this group.

nextSnapshotId

Serializable nextSnapshotId()

Gets the next snapshot id for new snapshot to add to this group.

Returns:

the next snapshot id