nvflare.app_opt.xgboost.histogram_based.controller module

class XGBFedController(train_timeout: int = 300, port: Optional[int] = None)[source]

Bases: Controller

Federated XGBoost training controller for histogram-base collaboration.

Parameters

  • train_timeout (int, optional) – Time to wait for clients to do local training in seconds.

  • port (int, optional) – the port to open XGBoost FL server

Raises

  • TypeError – when any of input arguments does not have correct type

  • ValueError – when any of input arguments is out of range

control_flow(abort_signal: Signal, fl_ctx: FLContext)[source]

This is the control logic for the RUN.

NOTE: this is running in a separate thread, and its life is the duration of the RUN.

Parameters

  • fl_ctx – the FL context

  • abort_signal – the abort signal. If triggered, this method stops waiting and returns to the caller.

process_result_of_unknown_task(client: Client, task_name, client_task_id, result: Shareable, fl_ctx: FLContext)[source]

Process result when no task is found for it.

This is called when a result submission is received from a client, but no standing task can be found for it (from the task queue)

This could happen when: - the client’s submission is too late - the task is already completed - the Controller lost the task, e.g. the Server is restarted

Parameters

  • client – the client that the result comes from

  • task_name – the name of the task

  • client_task_id – ID of the task

  • result – the result from the client

  • fl_ctx – the FL context that comes with the client’s submission

start_controller(fl_ctx: FLContext)[source]

Starts the controller.

This method is called at the beginning of the RUN.

Parameters

  • fl_ctx – the FL context. You can use this context to access services provided by the

  • example (framework. For) –

  • your (you can get Command Register from it and register) –

  • modules. (admin command) –

stop_controller(fl_ctx: FLContext)[source]

Stops the controller.

This method is called right before the RUN is ended.

Parameters

  • fl_ctx – the FL context. You can use this context to access services provided by the

  • example (framework. For) –

  • your (you can get Command Register from it and unregister) –

  • modules. (admin command) –