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prefect.py
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prefect.py
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import asyncio
from datetime import timedelta
from typing import Any, Callable, Type
from omnipy.api.protocols import IsDagFlow, IsFuncFlow, IsLinearFlow, IsPrefectEngineConfig, IsTask
from omnipy.config.engine import PrefectEngineConfig
from omnipy.engine.job_runner import (DagFlowRunnerEngine,
FuncFlowRunnerEngine,
LinearFlowRunnerEngine,
TaskRunnerEngine)
from omnipy.modules.prefect import flow as prefect_flow
from omnipy.modules.prefect import Flow as PrefectFlow
from omnipy.modules.prefect import task as prefect_task
from omnipy.modules.prefect import Task as PrefectTask
from omnipy.modules.prefect import task_input_hash
from omnipy.util.helpers import resolve
class PrefectEngine(TaskRunnerEngine,
LinearFlowRunnerEngine,
DagFlowRunnerEngine,
FuncFlowRunnerEngine):
"""Job runner engine for Prefect"""
def _init_engine(self) -> None:
...
def _update_from_config(self) -> None:
...
@classmethod
def get_config_cls(cls) -> Type[IsPrefectEngineConfig]:
return PrefectEngineConfig
# TaskRunnerEngine
def _init_task(self, task: IsTask, call_func: Callable) -> PrefectTask:
assert isinstance(self._config, PrefectEngineConfig)
task_kwargs = dict(
name=task.name,
cache_key_fn=task_input_hash if self._config.use_cached_results else None,
cache_expiration=timedelta(days=1))
if task.has_coroutine_func():
@prefect_task(**task_kwargs)
async def run_task(*inner_args, **inner_kwargs):
return await call_func(*inner_args, **inner_kwargs)
else:
@prefect_task(**task_kwargs)
def run_task(*inner_args, **inner_kwargs):
return call_func(*inner_args, **inner_kwargs)
return run_task
def _run_task(self, state: PrefectTask, task: IsTask, call_func: Callable, *args,
**kwargs) -> Any:
_prefect_task = state
if task.in_flow_context:
return _prefect_task(*args, **kwargs)
else:
flow_kwargs = dict(name=task.name)
if asyncio.iscoroutinefunction(_prefect_task):
@prefect_flow(**flow_kwargs)
async def task_flow(*inner_args, **inner_kwargs):
return await resolve(_prefect_task(*inner_args, **inner_kwargs))
else:
@prefect_flow(**flow_kwargs)
def task_flow(*inner_args, **inner_kwargs):
return _prefect_task(*inner_args, **inner_kwargs)
return task_flow(*args, **kwargs)
# LinearFlowRunnerEngine
def _init_linear_flow(self, linear_flow: IsLinearFlow) -> Any:
assert isinstance(self._config, PrefectEngineConfig)
flow_kwargs = dict(name=linear_flow.name,)
call_func = self.default_linear_flow_run_decorator(linear_flow)
if linear_flow.has_coroutine_func():
@prefect_flow(**flow_kwargs)
async def run_linear_flow(*inner_args, **inner_kwargs):
with linear_flow.flow_context:
return await resolve(call_func(*inner_args, **inner_kwargs))
else:
@prefect_flow(**flow_kwargs)
def run_linear_flow(*inner_args, **inner_kwargs):
with linear_flow.flow_context:
return call_func(*inner_args, **inner_kwargs)
return run_linear_flow
def _run_linear_flow(self, state: Any, linear_flow: IsLinearFlow, *args, **kwargs) -> Any:
_prefect_flow = state
return _prefect_flow(*args, **kwargs)
# DagFlowRunnerEngine
def _init_dag_flow(self, dag_flow: IsDagFlow) -> Any:
assert isinstance(self._config, PrefectEngineConfig)
flow_kwargs = dict(name=dag_flow.name,)
call_func = self.default_dag_flow_run_decorator(dag_flow)
if dag_flow.has_coroutine_func():
@prefect_flow(**flow_kwargs)
async def run_dag_flow(*inner_args, **inner_kwargs):
with dag_flow.flow_context:
return await resolve(call_func(*inner_args, **inner_kwargs))
else:
@prefect_flow(**flow_kwargs)
def run_dag_flow(*inner_args, **inner_kwargs):
with dag_flow.flow_context:
return call_func(*inner_args, **inner_kwargs)
return run_dag_flow
def _run_dag_flow(self, state: PrefectFlow, flow: IsDagFlow, *args, **kwargs) -> Any:
_prefect_flow = state
return _prefect_flow(*args, **kwargs)
# FuncFlowRunnerEngine
def _init_func_flow(self, func_flow: IsFuncFlow, call_func: Callable) -> object:
assert isinstance(self._config, PrefectEngineConfig)
flow_kwargs = dict(name=func_flow.name,)
if func_flow.has_coroutine_func():
@prefect_flow(**flow_kwargs)
async def run_func_flow(*inner_args, **inner_kwargs):
with func_flow.flow_context:
return await resolve(call_func(*inner_args, **inner_kwargs))
else:
@prefect_flow(**flow_kwargs)
def run_func_flow(*inner_args, **inner_kwargs):
with func_flow.flow_context:
return call_func(*inner_args, **inner_kwargs)
return run_func_flow
def _run_func_flow(self,
state: Any,
func_flow: IsFuncFlow,
call_func: Callable,
*args,
**kwargs) -> Any:
_prefect_flow = state
return _prefect_flow(*args, **kwargs)
# TODO: Refactor redundant code