80bd935c19
* Add ServiceSwitcherStrategyFailover for automatic error-based service switching Introduce a strategy hierarchy: ServiceSwitcherStrategy (base) → ServiceSwitcherStrategyManual (handles ManuallySwitchServiceFrame) → ServiceSwitcherStrategyFailover (adds error-based failover). ServiceSwitcher now defaults to ServiceSwitcherStrategyManual with strategy_type optional. Non-fatal ErrorFrames are forwarded to the strategy via handle_error(). * Move metadata request into _set_active_if_available Requesting metadata is part of making a service active, so it belongs alongside setting _active_service and firing on_service_switched. This removes the duplicate queue_frame calls from ServiceSwitcher push_frame and process_frame.
226 B
226 B
ServiceSwitcherStrategybase class now provides ahandle_error()hook for subclasses to implement error-based switching.ServiceSwitcherdefaults toServiceSwitcherStrategyManualandstrategy_typeis now optional.