StateMachine¶

Canonical path: o6.pubsub.StateMachine

StateMachine ¶

Bases: Protocol

Callable implementing the transition of one PubSub component.

__call__(current, target)

Move the component from one state to another.

Called synchronously on the server's event loop, so it must not block.

Parameters:

Name	Type	Description	Default
`current`	`PubSubState`	The component's current `PubSubState`.	required
`target`	`PubSubState`	The `PubSubState` the server is requesting.	required

Returns:

Type	Description
`StatusCode`	The StatusCode of the transition and the state actually reached. A bad
`PubSubState`	status, an exception, a recursive transition, or a malformed result
`tuple[StatusCode, PubSubState]`	moves the component to `ERROR`.