InvocationContext Extensibility

peterallenwebb commented 6 months ago

Short description

A couple of months ago, we added InvocationContext, a cross-thread context manager supporting isolation between dbt invocations. Now we want to support extensions and modifications of its runtime behavior without requiring changes in dbt-common. This will mean designing and implementing a general mechanism for registering and using context objects. Uses cases include:

Environment variable cache (originally added for performance reasons)
Flags object
Relation cache
invocation_id
EventManager
Adapter manager
Record/Replay manager
Most other objects currently implemented as global variables in dbt

The key will be to provide a way to register and manage the lifetimes of these objects with the InvocationContext, while allowing them to be defined and implemented in the libraries that depend on dbt-common.

Acceptance criteria

TBD

Suggested Tests

TBD

Impact to Other Teams

None

Will backports be required?

No

github-actions[bot] commented 2 weeks ago

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github-actions[bot] commented 1 week ago

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dbt-labs / dbt-common