@Override
public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
ListenerRegistration<L> registerChangeListener(
final YangInstanceIdentifier path, final L listener, final DataChangeScope scope) {
/*
* Make sure commit is not occurring right now. Listener has to be
* registered and its state capture enqueued at a consistent point.
*
* FIXME: improve this to read-write lock, such that multiple listener
* registrations can occur simultaneously
*/
final DataChangeListenerRegistration<L> reg;
synchronized (this) {
LOG.debug("{}: Registering data change listener {} for {}", name, listener, path);
reg = listenerTree.registerDataChangeListener(path, listener, scope);
Optional<NormalizedNode<?, ?>> currentState = dataTree.takeSnapshot().readNode(path);
if (currentState.isPresent()) {
final NormalizedNode<?, ?> data = currentState.get();
final DOMImmutableDataChangeEvent event =
DOMImmutableDataChangeEvent.builder(DataChangeScope.BASE) //
.setAfter(data) //
.addCreated(path, data) //
.build();
executor.submit(new ChangeListenerNotifyTask(Collections.singletonList(reg), event));
}
}
return new AbstractListenerRegistration<L>(listener) {
@Override
protected void removeRegistration() {
synchronized (InMemoryDOMDataStore.this) {
reg.close();
}
}
};
}
@Override
public DOMStoreWriteTransaction newWriteOnlyTransaction() {
return new SnapshotBackedWriteTransaction(nextIdentifier(), dataTree.takeSnapshot(), this);
}
@Override
public DOMStoreReadTransaction newReadOnlyTransaction() {
return new SnapshotBackedReadTransaction(nextIdentifier(), dataTree.takeSnapshot());
}
@Override
public synchronized void onGlobalContextUpdated(final SchemaContext ctx) {
dataTree.setSchemaContext(ctx);
}