/**
* Cleans up instances of {@link BlockSnapshot} that failed to be created. Also, any stale entries
* in {@link BlockSnapshotSession#getLinkedTargets()} will be cleaned up.
*
* @param volume Volume URI to process.
* @param itemsToUpdate Items to be updated.
* @param itemsToDelete Items to be deleted.
*/
@Override
public void process(
URI volume, Collection<DataObject> itemsToUpdate, Collection<DataObject> itemsToDelete) {
List<BlockSnapshot> snapshots =
CustomQueryUtility.queryActiveResourcesByConstraint(
getDbClient(),
BlockSnapshot.class,
ContainmentConstraint.Factory.getVolumeSnapshotConstraint(volume));
List<BlockSnapshot> failedSnapshots = new ArrayList<>();
List<BlockSnapshotSession> updateSessions = new ArrayList<>();
failedSnapshots.addAll(
Collections2.filter(
snapshots,
new Predicate<BlockSnapshot>() {
@Override
public boolean apply(BlockSnapshot snapshot) {
return Strings.isNullOrEmpty(snapshot.getNativeId());
}
}));
// Removed failed snapshots from any existing sessions
for (BlockSnapshot failedSnapshot : failedSnapshots) {
log.info("Removing failed snapshot: {}", failedSnapshot.getLabel());
List<BlockSnapshotSession> sessions =
CustomQueryUtility.queryActiveResourcesByConstraint(
getDbClient(),
BlockSnapshotSession.class,
ContainmentConstraint.Factory.getLinkedTargetSnapshotSessionConstraint(
failedSnapshot.getId()));
for (BlockSnapshotSession session : sessions) {
log.info("Updating existing session: {}", session.getSessionLabel());
StringSet linkedTargets = session.getLinkedTargets();
linkedTargets.remove(failedSnapshot.getId().toString());
updateSessions.add(session);
}
}
itemsToUpdate.addAll(updateSessions);
itemsToDelete.addAll(failedSnapshots);
}
