Struct steno::ActionFunc

pub struct ActionFunc<ActionFuncType, UndoFuncType> { /* private fields */ }

Implementation of Action that uses ordinary functions for the action and undo action

Implementations

impl<ActionFuncType, UndoFuncType> ActionFunc<ActionFuncType, UndoFuncType>

pub fn new_action<Name, UserType, ActionFuncOutput>( name: Name, action_func: ActionFuncType, undo_func: UndoFuncType ) -> Arc<dyn Action<UserType>>where Name: AsRef<str>, UserType: SagaType, for<'c> ActionFuncType: ActionFn<'c, UserType, Output = ActionFuncResult<ActionFuncOutput, ActionError>>, ActionFuncOutput: ActionData, for<'c> UndoFuncType: ActionFn<'c, UserType, Output = UndoResult>,

Construct an Action from a pair of functions, using action_func for the action and undo_func for the undo action

The result is returned as Arc<dyn Action> so that it can be used directly where Actions are expected. (The struct ActionFunc has no interfaces of its own so there’s generally no need to have the specific type.)

Trait Implementations

impl<UserType, ActionFuncType, ActionFuncOutput, UndoFuncType> Action<UserType> for ActionFunc<ActionFuncType, UndoFuncType>where UserType: SagaType, for<'c> ActionFuncType: ActionFn<'c, UserType, Output = ActionFuncResult<ActionFuncOutput, ActionError>>, ActionFuncOutput: ActionData, for<'c> UndoFuncType: ActionFn<'c, UserType, Output = UndoResult>,

fn do_it(&self, sgctx: ActionContext<UserType>) -> BoxFuture<'_, ActionResult>

Executes the action for this saga node, whatever that is. Actions function like requests in distributed sagas: critically, they must be idempotent. This means that multiple calls to the action have the same result on the system as a single call, although the action is not necessarily required to return the same result.

fn undo_it(&self, sgctx: ActionContext<UserType>) -> BoxFuture<'_, UndoResult>

Executes the undo action for this saga node, whatever that is.

fn name(&self) -> ActionName

Return the name of the action used as the key in the ActionRegistry

impl<ActionFuncType, UndoFuncType> Debug for ActionFunc<ActionFuncType, UndoFuncType>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.