neutron-lib/releasenotes/notes/transaction_constraint-d3f9...

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YAML

---
features:
- |
Contexts may now have transaction constraints set on them to be enforced
by the revision plugin in Neutron for generalized compare-and-swap updates.
Calling ``set_transaction_constraint`` on the context before performing a
resource mutation will setup the constraint. This is also exposed to users
via the HTTP API with ``if-match`` headers and the API layer sets the
constraint on the context.