nvflare.app_common.executors.client_api.cell_backend module

Shared CJ-side Cell protocol machinery for out-of-process Client API modes.

class CellBackendBase

Bases: ClientAPIBackendSpec

Common Cell setup and trainer-to-CJ protocol callbacks.

Subclasses own rendezvous and liveness. Attach additionally enables result attempt correlation so lost acceptance replies can be recovered safely.

result_attempts = False

class CellSession(trainer_fqcn: str, session_id: str | None = None)

Bases: object

Protocol state shared by owned and attached trainer sessions.

peer_silent_for() → float | None

silent_for() → float | None

touch() → None

touch_peer_activity() → None

class CellTask(task_id: str)

Bases: object

Correlation state for the one task admitted by a backend.