From 6bfb87df69889f0082e8ecbe7732d24ad69e64c2 Mon Sep 17 00:00:00 2001 From: Jusong Yu <jusong.yeu@gmail.com> Date: Tue, 3 Dec 2024 00:48:53 +0100 Subject: [PATCH] Refactoring create_state as static function initialize state from label create_state refact Hashable initialized + parameters passed to Hashable Fix pre-commit errors --- src/plumpy/base/state_machine.py | 45 +++--- src/plumpy/process_states.py | 235 ++++++++++++++++--------------- src/plumpy/processes.py | 42 +++--- src/plumpy/workchains.py | 10 +- tests/base/test_statemachine.py | 15 +- 5 files changed, 173 insertions(+), 174 deletions(-) diff --git a/src/plumpy/base/state_machine.py b/src/plumpy/base/state_machine.py index 27b1e5f8..fc926008 100644 --- a/src/plumpy/base/state_machine.py +++ b/src/plumpy/base/state_machine.py @@ -34,7 +34,6 @@ _LOGGER = logging.getLogger(__name__) -LABEL_TYPE = Union[None, enum.Enum, str] EVENT_CALLBACK_TYPE = Callable[['StateMachine', Hashable, Optional['State']], None] @@ -131,9 +130,12 @@ def transition(self: Any, *a: Any, **kw: Any) -> Any: @runtime_checkable class State(Protocol): - LABEL: ClassVar[LABEL_TYPE] + LABEL: ClassVar[Any] + ALLOWED: ClassVar[set[Any]] is_terminal: ClassVar[bool] + def __init__(self, *args: Any, **kwargs: Any): ... + def enter(self) -> None: ... def exit(self) -> None: ... @@ -146,7 +148,6 @@ def interrupt(self, reason: Exception) -> None: ... @runtime_checkable class Proceedable(Protocol): - def execute(self) -> State | None: """ Execute the state, performing the actions that this state is responsible for. @@ -155,6 +156,14 @@ def execute(self) -> State | None: ... +def create_state(st: StateMachine, state_label: Hashable, *args: Any, **kwargs: Any) -> State: + if state_label not in st.get_states_map(): + raise ValueError(f'{state_label} is not a valid state') + + state_cls = st.get_states_map()[state_label] + return state_cls(*args, **kwargs) + + class StateEventHook(enum.Enum): """ Hooks that can be used to register callback at various points in the state transition @@ -203,13 +212,13 @@ def get_states(cls) -> Sequence[Type[State]]: raise RuntimeError('States not defined') @classmethod - def initial_state_label(cls) -> LABEL_TYPE: + def initial_state_label(cls) -> Any: cls.__ensure_built() assert cls.STATES is not None return cls.STATES[0].LABEL @classmethod - def get_state_class(cls, label: LABEL_TYPE) -> Type[State]: + def get_state_class(cls, label: Any) -> Type[State]: cls.__ensure_built() assert cls._STATES_MAP is not None return cls._STATES_MAP[label] @@ -253,11 +262,11 @@ def init(self) -> None: def __str__(self) -> str: return f'<{self.__class__.__name__}> ({self.state})' - def create_initial_state(self) -> State: - return self.get_state_class(self.initial_state_label())(self) + def create_initial_state(self, *args: Any, **kwargs: Any) -> State: + return self.get_state_class(self.initial_state_label())(self, *args, **kwargs) @property - def state(self) -> Optional[LABEL_TYPE]: + def state(self) -> Any: if self._state is None: return None return self._state.LABEL @@ -297,6 +306,7 @@ def transition_to(self, new_state: State | None, **kwargs: Any) -> None: The arguments are passed to the state class to create state instance. (process arg does not need to pass since it will always call with 'self' as process) """ + print(f'try: {self._state} -> {new_state}') assert not self._transitioning, 'Cannot call transition_to when already transitioning state' if new_state is None: @@ -353,17 +363,6 @@ def get_debug(self) -> bool: def set_debug(self, enabled: bool) -> None: self._debug: bool = enabled - def create_state(self, state_label: Hashable, *args: Any, **kwargs: Any) -> State: - # XXX: this method create state from label, which is duplicate as _create_state_instance and less generic - # because the label is defined after the state and required to be know before calling this function. - # This method should be replaced by `_create_state_instance`. - # aiida-core using this method for its Waiting state override. - try: - state_cls = self.get_states_map()[state_label] - return state_cls(self, *args, **kwargs) - except KeyError: - raise ValueError(f'{state_label} is not a valid state') - def _exit_current_state(self, next_state: State) -> None: """Exit the given state""" @@ -375,7 +374,7 @@ def _exit_current_state(self, next_state: State) -> None: return # Nothing to exit if next_state.LABEL not in self._state.ALLOWED: - raise RuntimeError(f'Cannot transition from {self._state.LABEL} to {next_state.label}') + raise RuntimeError(f'Cannot transition from {self._state.LABEL} to {next_state.LABEL}') self._fire_state_event(StateEventHook.EXITING_STATE, next_state) self._state.exit() @@ -386,9 +385,3 @@ def _enter_next_state(self, next_state: State) -> None: next_state.enter() self._state = next_state self._fire_state_event(StateEventHook.ENTERED_STATE, last_state) - - def _create_state_instance(self, state_cls: type[State], **kwargs: Any) -> State: - if state_cls.LABEL not in self.get_states_map(): - raise ValueError(f'{state_cls.LABEL} is not a valid state') - - return state_cls(self, **kwargs) diff --git a/src/plumpy/process_states.py b/src/plumpy/process_states.py index cc9169c7..5f3e8237 100644 --- a/src/plumpy/process_states.py +++ b/src/plumpy/process_states.py @@ -5,7 +5,20 @@ import traceback from enum import Enum from types import TracebackType -from typing import TYPE_CHECKING, Any, Callable, Optional, Tuple, Type, Union, cast, final +from typing import ( + TYPE_CHECKING, + Any, + Callable, + ClassVar, + Optional, + Protocol, + Tuple, + Type, + Union, + cast, + final, + runtime_checkable, +) import yaml from yaml.loader import Loader @@ -20,9 +33,9 @@ _HAS_TBLIB = False from . import exceptions, futures, persistence, utils -from .base import state_machine +from .base import state_machine as st from .lang import NULL -from .persistence import auto_persist +from .persistence import LoadSaveContext, auto_persist from .utils import SAVED_STATE_TYPE __all__ = [ @@ -138,22 +151,28 @@ class ProcessState(Enum): The possible states that a :class:`~plumpy.processes.Process` can be in. """ - CREATED: str = 'created' - RUNNING: str = 'running' - WAITING: str = 'waiting' - FINISHED: str = 'finished' - EXCEPTED: str = 'excepted' - KILLED: str = 'killed' + # FIXME: see LSP error of return a exception, the type is Literal[str] which is invariant, tricky + CREATED = 'created' + RUNNING = 'running' + WAITING = 'waiting' + FINISHED = 'finished' + EXCEPTED = 'excepted' + KILLED = 'killed' + + +@runtime_checkable +class Savable(Protocol): + def save(self, save_context: LoadSaveContext | None = None) -> SAVED_STATE_TYPE: ... @final -@auto_persist('args', 'kwargs', 'in_state') -class Created(state_machine.State, persistence.Savable): - LABEL = ProcessState.CREATED - ALLOWED = {ProcessState.RUNNING, ProcessState.KILLED, ProcessState.EXCEPTED} +@auto_persist('args', 'kwargs') +class Created(persistence.Savable): + LABEL: ClassVar = ProcessState.CREATED + ALLOWED: ClassVar = {ProcessState.RUNNING, ProcessState.KILLED, ProcessState.EXCEPTED} RUN_FN = 'run_fn' - is_terminal = False + is_terminal: ClassVar[bool] = False def __init__(self, process: 'Process', run_fn: Callable[..., Any], *args: Any, **kwargs: Any) -> None: assert run_fn is not None @@ -161,7 +180,6 @@ def __init__(self, process: 'Process', run_fn: Callable[..., Any], *args: Any, * self.run_fn = run_fn self.args = args self.kwargs = kwargs - self.in_state = True def save_instance_state(self, out_state: SAVED_STATE_TYPE, save_context: persistence.LoadSaveContext) -> None: super().save_instance_state(out_state, save_context) @@ -173,24 +191,21 @@ def load_instance_state(self, saved_state: SAVED_STATE_TYPE, load_context: persi self.run_fn = getattr(self.process, saved_state[self.RUN_FN]) - async def execute(self) -> state_machine.State: - return self.process.create_state(ProcessState.RUNNING, self.run_fn, *self.args, **self.kwargs) - - def enter(self) -> None: - self.in_state = True + def execute(self) -> st.State: + return st.create_state( + self.process, ProcessState.RUNNING, process=self.process, run_fn=self.run_fn, *self.args, **self.kwargs + ) - def exit(self) -> None: - if self.is_terminal: - raise exceptions.InvalidStateError(f'Cannot exit a terminal state {self.LABEL}') + def enter(self) -> None: ... - self.in_state = False + def exit(self) -> None: ... @final -@auto_persist('args', 'kwargs', 'in_state') -class Running(state_machine.State, persistence.Savable): - LABEL = ProcessState.RUNNING - ALLOWED = { +@auto_persist('args', 'kwargs') +class Running(persistence.Savable): + LABEL: ClassVar = ProcessState.RUNNING + ALLOWED: ClassVar = { ProcessState.RUNNING, ProcessState.WAITING, ProcessState.FINISHED, @@ -206,7 +221,7 @@ class Running(state_machine.State, persistence.Savable): _running: bool = False _run_handle = None - is_terminal = False + is_terminal: ClassVar[bool] = False def __init__(self, process: 'Process', run_fn: Callable[..., Any], *args: Any, **kwargs: Any) -> None: assert run_fn is not None @@ -215,7 +230,6 @@ def __init__(self, process: 'Process', run_fn: Callable[..., Any], *args: Any, * self.args = args self.kwargs = kwargs self._run_handle = None - self.in_state = False def save_instance_state(self, out_state: SAVED_STATE_TYPE, save_context: persistence.LoadSaveContext) -> None: super().save_instance_state(out_state, save_context) @@ -234,7 +248,7 @@ def load_instance_state(self, saved_state: SAVED_STATE_TYPE, load_context: persi def interrupt(self, reason: Any) -> None: pass - async def execute(self) -> state_machine.State: + def execute(self) -> st.State: if self._command is not None: command = self._command else: @@ -248,8 +262,10 @@ async def execute(self) -> state_machine.State: # Let this bubble up to the caller raise except Exception: - excepted = self.process.create_state(ProcessState.EXCEPTED, *sys.exc_info()[1:]) - return cast(state_machine.State, excepted) + _, exception, traceback = sys.exc_info() + # excepted = state_cls(exception=exception, traceback=traceback) + excepted = Excepted(exception=exception, traceback=traceback) + return excepted else: if not isinstance(result, Command): if isinstance(result, exceptions.UnsuccessfulResult): @@ -258,42 +274,52 @@ async def execute(self) -> state_machine.State: # Got passed a basic return type result = Stop(result, True) - command = result + command = cast(Stop, result) next_state = self._action_command(command) return next_state - def _action_command(self, command: Union[Kill, Stop, Wait, Continue]) -> state_machine.State: + def _action_command(self, command: Union[Kill, Stop, Wait, Continue]) -> st.State: if isinstance(command, Kill): - state = self.process.create_state(ProcessState.KILLED, command.msg) + state = st.create_state(self.process, ProcessState.KILLED, msg=command.msg) # elif isinstance(command, Pause): # self.pause() elif isinstance(command, Stop): - state = self.process.create_state(ProcessState.FINISHED, command.result, command.successful) + state = st.create_state( + self.process, ProcessState.FINISHED, result=command.result, successful=command.successful + ) elif isinstance(command, Wait): - state = self.process.create_state(ProcessState.WAITING, command.continue_fn, command.msg, command.data) + state = st.create_state( + self.process, + ProcessState.WAITING, + process=self.process, + done_callback=command.continue_fn, + msg=command.msg, + data=command.data, + ) elif isinstance(command, Continue): - state = self.process.create_state(ProcessState.RUNNING, command.continue_fn, *command.args) + state = st.create_state( + self.process, + ProcessState.RUNNING, + process=self.process, + run_fn=command.continue_fn, + *command.args, + **command.kwargs, + ) else: raise ValueError('Unrecognised command') - return cast(state_machine.State, state) # casting from base.State to process.State - - def enter(self) -> None: - self.in_state = True + return state - def exit(self) -> None: - if self.is_terminal: - raise exceptions.InvalidStateError(f'Cannot exit a terminal state {self.LABEL}') + def enter(self) -> None: ... - self.in_state = False + def exit(self) -> None: ... -@final -@auto_persist('msg', 'data', 'in_state') -class Waiting(state_machine.State, persistence.Savable): - LABEL = ProcessState.WAITING - ALLOWED = { +@auto_persist('msg', 'data') +class Waiting(persistence.Savable): + LABEL: ClassVar = ProcessState.WAITING + ALLOWED: ClassVar = { ProcessState.RUNNING, ProcessState.WAITING, ProcessState.KILLED, @@ -305,7 +331,7 @@ class Waiting(state_machine.State, persistence.Savable): _interruption = None - is_terminal = False + is_terminal: ClassVar[bool] = False def __str__(self) -> str: state_info = super().__str__() @@ -325,7 +351,6 @@ def __init__( self.msg = msg self.data = data self._waiting_future: futures.Future = futures.Future() - self.in_state = False def save_instance_state(self, out_state: SAVED_STATE_TYPE, save_context: persistence.LoadSaveContext) -> None: super().save_instance_state(out_state, save_context) @@ -347,7 +372,7 @@ def interrupt(self, reason: Exception) -> None: # This will cause the future in execute() to raise the exception self._waiting_future.set_exception(reason) - async def execute(self) -> state_machine.State: # type: ignore + async def execute(self) -> st.State: try: result = await self._waiting_future except Interruption: @@ -358,11 +383,15 @@ async def execute(self) -> state_machine.State: # type: ignore raise if result == NULL: - next_state = self.process.create_state(ProcessState.RUNNING, self.done_callback) + next_state = st.create_state( + self.process, ProcessState.RUNNING, process=self.process, run_fn=self.done_callback + ) else: - next_state = self.process.create_state(ProcessState.RUNNING, self.done_callback, result) + next_state = st.create_state( + self.process, ProcessState.RUNNING, process=self.process, done_callback=self.done_callback, *result + ) - return cast(state_machine.State, next_state) # casting from base.State to process.State + return next_state def resume(self, value: Any = NULL) -> None: assert self._waiting_future is not None, 'Not yet waiting' @@ -372,47 +401,39 @@ def resume(self, value: Any = NULL) -> None: self._waiting_future.set_result(value) - def enter(self) -> None: - self.in_state = True + def enter(self) -> None: ... - def exit(self) -> None: - if self.is_terminal: - raise exceptions.InvalidStateError(f'Cannot exit a terminal state {self.LABEL}') + def exit(self) -> None: ... - self.in_state = False - -@auto_persist('in_state') -class Excepted(state_machine.State, persistence.Savable): +@final +class Excepted(persistence.Savable): """ - Excepted state, can optionally provide exception and trace_back + Excepted state, can optionally provide exception and traceback :param exception: The exception instance - :param trace_back: An optional exception traceback + :param traceback: An optional exception traceback """ - LABEL = ProcessState.EXCEPTED + LABEL: ClassVar = ProcessState.EXCEPTED + ALLOWED: ClassVar[set[str]] = set() EXC_VALUE = 'ex_value' TRACEBACK = 'traceback' - is_terminal = True + is_terminal: ClassVar = True def __init__( self, - process: 'Process', exception: Optional[BaseException], - trace_back: Optional[TracebackType] = None, + traceback: Optional[TracebackType] = None, ): """ - :param process: The associated process :param exception: The exception instance - :param trace_back: An optional exception traceback + :param traceback: An optional exception traceback """ - self.process = process self.exception = exception - self.traceback = trace_back - self.in_state = False + self.traceback = traceback def __str__(self) -> str: exception = traceback.format_exception_only(type(self.exception) if self.exception else None, self.exception)[0] @@ -426,7 +447,6 @@ def save_instance_state(self, out_state: SAVED_STATE_TYPE, save_context: persist def load_instance_state(self, saved_state: SAVED_STATE_TYPE, load_context: persistence.LoadSaveContext) -> None: super().load_instance_state(saved_state, load_context) - self.process = load_context.process self.exception = yaml.load(saved_state[self.EXC_VALUE], Loader=Loader) if _HAS_TBLIB: @@ -449,50 +469,40 @@ def get_exc_info( self.traceback, ) - def enter(self) -> None: - self.in_state = True + def enter(self) -> None: ... - def exit(self) -> None: - if self.is_terminal: - raise exceptions.InvalidStateError(f'Cannot exit a terminal state {self.LABEL}') + def exit(self) -> None: ... - self.in_state = False - -@auto_persist('result', 'successful', 'in_state') -class Finished(state_machine.State, persistence.Savable): +@final +@auto_persist('result', 'successful') +class Finished(persistence.Savable): """State for process is finished. :param result: The result of process :param successful: Boolean for the exit code is ``0`` the process is successful. """ - LABEL = ProcessState.FINISHED + LABEL: ClassVar = ProcessState.FINISHED + ALLOWED: ClassVar[set[str]] = set() - is_terminal = True + is_terminal: ClassVar[bool] = True - def __init__(self, process: 'Process', result: Any, successful: bool) -> None: - self.process = process + def __init__(self, result: Any, successful: bool) -> None: self.result = result self.successful = successful - self.in_state = False def load_instance_state(self, saved_state: SAVED_STATE_TYPE, load_context: persistence.LoadSaveContext) -> None: super().load_instance_state(saved_state, load_context) - self.process = load_context.process - def enter(self) -> None: - self.in_state = True + def enter(self) -> None: ... - def exit(self) -> None: - if self.is_terminal: - raise exceptions.InvalidStateError(f'Cannot exit a terminal state {self.LABEL}') + def exit(self) -> None: ... - self.in_state = False - -@auto_persist('msg', 'in_state') -class Killed(state_machine.State, persistence.Savable): +@final +@auto_persist('msg') +class Killed(persistence.Savable): """ Represents a state where a process has been killed. @@ -502,30 +512,23 @@ class Killed(state_machine.State, persistence.Savable): :param msg: An optional message explaining the reason for the process termination. """ - LABEL = ProcessState.KILLED + LABEL: ClassVar = ProcessState.KILLED + ALLOWED: ClassVar[set[str]] = set() - is_terminal = True + is_terminal: ClassVar[bool] = True - def __init__(self, process: 'Process', msg: Optional[MessageType]): + def __init__(self, msg: Optional[MessageType]): """ - :param process: The associated process :param msg: Optional kill message """ - self.process = process self.msg = msg def load_instance_state(self, saved_state: SAVED_STATE_TYPE, load_context: persistence.LoadSaveContext) -> None: super().load_instance_state(saved_state, load_context) - self.process = load_context.process - - def enter(self) -> None: - self.in_state = True - def exit(self) -> None: - if self.is_terminal: - raise exceptions.InvalidStateError(f'Cannot exit a terminal state {self.LABEL}') + def enter(self) -> None: ... - self.in_state = False + def exit(self) -> None: ... # endregion diff --git a/src/plumpy/processes.py b/src/plumpy/processes.py index 74808291..bae08dd4 100644 --- a/src/plumpy/processes.py +++ b/src/plumpy/processes.py @@ -1,6 +1,8 @@ # -*- coding: utf-8 -*- """The main Process module""" +from __future__ import annotations + import abc import asyncio import contextlib @@ -58,6 +60,7 @@ StateMachine, StateMachineError, TransitionFailed, + create_state, event, ) from .base.utils import call_with_super_check, super_check @@ -194,7 +197,7 @@ def get_states(cls) -> Sequence[Type[state_machine.State]]: ) @classmethod - def get_state_classes(cls) -> Dict[Hashable, Type[state_machine.State]]: + def get_state_classes(cls) -> dict[process_states.ProcessState, Type[state_machine.State]]: # A mapping of the State constants to the corresponding state class return { process_states.ProcessState.CREATED: process_states.Created, @@ -633,7 +636,9 @@ def save_instance_state( """ super().save_instance_state(out_state, save_context) - out_state['_state'] = self._state.save() + # FIXME: the combined ProcessState protocol should cover the case + if isinstance(self._state, process_states.Savable): + out_state['_state'] = self._state.save() # Inputs/outputs if self.raw_inputs is not None: @@ -876,7 +881,7 @@ def on_finish(self, result: Any, successful: bool) -> None: validation_error = self.spec().outputs.validate(self.outputs) if validation_error: state_cls = self.get_states_map()[process_states.ProcessState.FINISHED] - finished_state = state_cls(self, result=result, successful=False) + finished_state = state_cls(result=result, successful=False) raise StateEntryFailed(finished_state) self.future().set_result(self.outputs) @@ -1074,8 +1079,8 @@ def transition_failed( if final_state == process_states.ProcessState.CREATED: raise exception.with_traceback(trace) - state_class = self.get_states_map()[process_states.ProcessState.EXCEPTED] - new_state = self._create_state_instance(state_class, exception=exception, trace_back=trace) + # state_class = self.get_states_map()[process_states.ProcessState.EXCEPTED] + new_state = create_state(self, process_states.ProcessState.EXCEPTED, exception=exception, traceback=trace) self.transition_to(new_state) def pause(self, msg: Union[str, None] = None) -> Union[bool, futures.CancellableAction]: @@ -1148,10 +1153,11 @@ def _create_interrupt_action(self, exception: process_states.Interruption) -> fu def do_kill(_next_state: state_machine.State) -> Any: try: - state_class = self.get_states_map()[process_states.ProcessState.KILLED] - new_state = self._create_state_instance(state_class, msg=exception.msg) + new_state = create_state(self, process_states.ProcessState.KILLED, msg=exception.msg) self.transition_to(new_state) return True + # FIXME: if try block except, will hit deadlock in event loop + # need to know how to debug it, and where to set a timeout. finally: self._killing = None @@ -1196,14 +1202,14 @@ def resume(self, *args: Any) -> None: return self._state.resume(*args) # type: ignore @event(to_states=process_states.Excepted) - def fail(self, exception: Optional[BaseException], trace_back: Optional[TracebackType]) -> None: + def fail(self, exception: Optional[BaseException], traceback: Optional[TracebackType]) -> None: """ Fail the process in response to an exception :param exception: The exception that caused the failure - :param trace_back: Optional exception traceback + :param traceback: Optional exception traceback """ - state_class = self.get_states_map()[process_states.ProcessState.EXCEPTED] - new_state = self._create_state_instance(state_class, exception=exception, trace_back=trace_back) + # state_class = self.get_states_map()[process_states.ProcessState.EXCEPTED] + new_state = create_state(self, process_states.ProcessState.EXCEPTED, exception=exception, traceback=traceback) self.transition_to(new_state) def kill(self, msg: Optional[MessageType] = None) -> Union[bool, asyncio.Future]: @@ -1223,7 +1229,7 @@ def kill(self, msg: Optional[MessageType] = None) -> Union[bool, asyncio.Future] # Already killing return self._killing - if self._stepping: + if self._stepping and isinstance(self._state, Interruptable): # Ask the step function to pause by setting this flag and giving the # caller back a future interrupt_exception = process_states.KillInterruption(msg) @@ -1232,8 +1238,7 @@ def kill(self, msg: Optional[MessageType] = None) -> Union[bool, asyncio.Future] self._state.interrupt(interrupt_exception) return cast(futures.CancellableAction, self._interrupt_action) - state_class = self.get_states_map()[process_states.ProcessState.KILLED] - new_state = self._create_state_instance(state_class, msg=msg) + new_state = create_state(self, process_states.ProcessState.KILLED, msg=msg) self.transition_to(new_state) return True @@ -1251,10 +1256,7 @@ def create_initial_state(self) -> state_machine.State: :return: A Created state """ - return cast( - state_machine.State, - self.get_state_class(process_states.ProcessState.CREATED)(self, self.run), - ) + return self.get_state_class(process_states.ProcessState.CREATED)(self, self.run) def recreate_state(self, saved_state: persistence.Bundle) -> state_machine.State: """ @@ -1325,7 +1327,9 @@ async def step(self) -> None: raise except Exception: # Overwrite the next state to go to excepted directly - next_state = self.create_state(process_states.ProcessState.EXCEPTED, *sys.exc_info()[1:]) + next_state = create_state( + self, process_states.ProcessState.EXCEPTED, exception=sys.exc_info()[1], traceback=sys.exc_info()[2] + ) self._set_interrupt_action(None) if self._interrupt_action: diff --git a/src/plumpy/workchains.py b/src/plumpy/workchains.py index eefd57f1..865a5b61 100644 --- a/src/plumpy/workchains.py +++ b/src/plumpy/workchains.py @@ -11,7 +11,6 @@ Any, Callable, Dict, - Hashable, List, Mapping, MutableSequence, @@ -71,6 +70,7 @@ def get_outline(self) -> Union['_Instruction', '_FunctionCall']: return self._outline +# FIXME: better use composition here @persistence.auto_persist('_awaiting') class Waiting(process_states.Waiting): """Overwrite the waiting state""" @@ -80,11 +80,11 @@ def __init__( process: 'WorkChain', done_callback: Optional[Callable[..., Any]], msg: Optional[str] = None, - awaiting: Optional[Dict[Union[asyncio.Future, processes.Process], str]] = None, + data: Optional[Dict[Union[asyncio.Future, processes.Process], str]] = None, ) -> None: - super().__init__(process, done_callback, msg, awaiting) + super().__init__(process, done_callback, msg, data) self._awaiting: Dict[asyncio.Future, str] = {} - for awaitable, key in (awaiting or {}).items(): + for awaitable, key in (data or {}).items(): resolved_awaitable = awaitable.future() if isinstance(awaitable, processes.Process) else awaitable self._awaiting[resolved_awaitable] = key @@ -124,7 +124,7 @@ class WorkChain(mixins.ContextMixin, processes.Process): _CONTEXT = 'CONTEXT' @classmethod - def get_state_classes(cls) -> Dict[Hashable, Type[state_machine.State]]: + def get_state_classes(cls) -> Dict[process_states.ProcessState, Type[state_machine.State]]: states_map = super().get_state_classes() states_map[process_states.ProcessState.WAITING] = Waiting return states_map diff --git a/tests/base/test_statemachine.py b/tests/base/test_statemachine.py index b6100614..6a61fe00 100644 --- a/tests/base/test_statemachine.py +++ b/tests/base/test_statemachine.py @@ -17,7 +17,7 @@ STOPPED = 'Stopped' -class Playing(state_machine.State): +class Playing: LABEL = PLAYING ALLOWED = {PAUSED, STOPPED} TRANSITIONS = {STOP: STOPPED} @@ -56,7 +56,7 @@ def exit(self) -> None: self.in_state = False -class Paused(state_machine.State): +class Paused: LABEL = PAUSED ALLOWED = {PLAYING, STOPPED} TRANSITIONS = {STOP: STOPPED} @@ -65,7 +65,6 @@ class Paused(state_machine.State): def __init__(self, player, playing_state): assert isinstance(playing_state, Playing), 'Must provide the playing state to pause' - super().__init__(player) self._player = player self.playing_state = playing_state @@ -74,9 +73,9 @@ def __str__(self): def play(self, track=None): if track is not None: - self.state_machine.transition_to(Playing(player=self.state_machine, track=track)) + self._player.transition_to(Playing(player=self.state_machine, track=track)) else: - self.state_machine.transition_to(self.playing_state) + self._player.transition_to(self.playing_state) def enter(self) -> None: self.in_state = True @@ -88,7 +87,7 @@ def exit(self) -> None: self.in_state = False -class Stopped(state_machine.State): +class Stopped: LABEL = STOPPED ALLOWED = { PLAYING, @@ -98,13 +97,13 @@ class Stopped(state_machine.State): is_terminal = False def __init__(self, player): - self.state_machine = player + self._player = player def __str__(self): return '[]' def play(self, track): - self.state_machine.transition_to(Playing(self.state_machine, track=track)) + self._player.transition_to(Playing(self._player, track=track)) def enter(self) -> None: self.in_state = True