DatastoreTransaction

class lsst.daf.butler.datastore.DatastoreTransaction(parent: DatastoreTransaction | None = None)

Bases: object

Keeps a log of Datastore activity and allow rollback.

Parameters:

parentDatastoreTransaction, optional

The parent transaction (if any)

Methods Summary

commit()	Commit this transaction.
registerUndo(name, undoFunc, *args, **kwargs)	Register event with undo function.
rollback()	Roll back all events in this transaction.
undoWith(name, undoFunc, *args, **kwargs)	Register undo function if nested operation succeeds.

Methods Documentation

commit() → None

Commit this transaction.

registerUndo(name: str, undoFunc: Callable, *args: Any, **kwargs: Any) → None

Register event with undo function.

Parameters:

namestr

Name of the event.

undoFuncfunc

Function to undo this event.

argstuple

Positional arguments to undoFunc.

**kwargs

Keyword arguments to undoFunc.

rollback() → None

Roll back all events in this transaction.

undoWith(name: str, undoFunc: Callable, *args: Any, **kwargs: Any) → Iterator[None]

Register undo function if nested operation succeeds.

Calls registerUndo.

This can be used to wrap individual undo-able statements within a DatastoreTransaction block. Multiple statements that can fail separately should not be part of the same undoWith block.

All arguments are forwarded directly to registerUndo.