45 lines
1.4 KiB
Python
45 lines
1.4 KiB
Python
import traceback
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from jeeves.core.objects import Flow, Result, Execution, ExecutionStep
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class Executor:
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def __init__(self, flow: Flow):
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self.step_count = len(flow.tasks)
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self._flow: Flow = flow
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self._execution = Execution(flow=flow, steps=self._get_steps(flow))
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@property
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def steps(self):
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for step in self._execution.steps:
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yield step
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def _get_steps(self, flow: Flow):
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for task in flow.tasks:
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yield ExecutionStep(task=task, result=Result())
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def execute_step(self, step: ExecutionStep):
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try:
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step.result = step.task.action.execute()
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except Exception as error:
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# Catch unhandled exceptions, mark the result as unsuccessful
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# and append the error as output.
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tb = traceback.format_exc()
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output = "\n".join(
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(
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"=" * 30,
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f"Uncaught exception on task {step.task.type}",
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f"\t{step.task}",
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f"Error: {error}",
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tb,
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"=" * 30,
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)
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)
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step.result = Result(success=False, output=output)
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return step.result
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def start(self):
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for step in self._execution.steps:
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self.execute_step(step)
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self._execution.success = step.result.success
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