Nexus: worker, workflow-backed operations, and workflow caller #813
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This reverts commit 7bf7f0d.
* Always move first error message to top-level * Inject ApplicationError
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Initial Python Temporal Nexus implementation.
Temporal SDK PR to accompany
samples-pythonPR Nexus samples samples-python#174Contains Nexus worker, components for users to define workflow-backed Nexus operations, and the ability to start and cancel a Nexus operation from a workflow.
Notes for reviewers
nexusrpc.handler.start_workflowis a top-level static function, but currently there's still a public contextvar objectnexusrpc.handler.temporal_operation_context. Let's settle on approach there. If we're using module-level getters I think they need to be named something likeget_client()etc, despite the fact that we haveactivity.metric_meter()? Little bit more discussion needed there.