As part of the greater configuration management goals, the core of this is a way of allowing the framework and potentially other services to persist and retrieve flows.
Some of the initial tenets include the following:
- flows should be immutable: the persistence provider interface will allow the creation, retrieval, and removal of flows but not the updating of them. While there may be higher level constructs that load a version of a flow as a basis for a new version, the original version will remain unchanged
- this should be implemented in a similar manner as our authorizer and login identity provider with some properties in nifi.properties to bootstrap the configuration
As part of this ticket will create a base implementation of the persistence provider and aid to refine implementation and interface.