82 lines
2.4 KiB
Python
82 lines
2.4 KiB
Python
# -*- coding: utf-8 -*-
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from kobo import shortcuts
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from kobo.threads import ThreadPool, WorkerThread
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class WeaverPhase(object):
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"""
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Special "phase" that manages other phases' run.
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It needs input-running schema where particular phases are composed
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sequentially and in parallel as well. A Sequential set of phases
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is named "pipeline".
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If any of the phases fail, we must ensure that others will stop correctly.
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Otherwise the whole process will hang.
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:param compose: it is needed for logging
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:param phases_schema: two-dimensional array of phases. Top dimension
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denotes particular pipelines. Second dimension contains phases.
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"""
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name = "weaver"
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def __init__(self, compose, phases_schema):
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self.msg = "---------- PHASE: %s ----------" % self.name.upper()
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self.compose = compose
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self.finished = False
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self.pool = ThreadPool(logger=self.compose._logger)
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if not phases_schema:
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msg = "No running schema was set for WeaverPhase"
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self.pool.log_error(msg)
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raise ValueError(msg)
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self._phases_schema = phases_schema
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def start(self):
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if self.finished:
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msg = (
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"Phase '%s' has already finished and can not be started twice"
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% self.name
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)
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self.pool.log_error(msg)
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raise RuntimeError(msg)
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self.compose.log_info("[BEGIN] %s" % self.msg)
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self.run()
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def run(self):
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for pipeline in shortcuts.force_list(self._phases_schema):
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self.pool.add(PipelineThread(self.pool))
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self.pool.queue_put(shortcuts.force_list(pipeline))
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self.pool.start()
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def stop(self):
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if self.finished:
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return
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if hasattr(self, "pool"):
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self.pool.stop()
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self.finished = True
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self.compose.log_info("[DONE ] %s" % self.msg)
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class PipelineThread(WorkerThread):
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"""
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Launches phases in pipeline sequentially
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"""
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def process(self, item, num):
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pipeline = shortcuts.force_list(item)
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phases_names = ", ".join(phase.name for phase in pipeline)
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msg = "Running pipeline (%d/%d). Phases: %s" % (
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num,
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self.pool.queue_total,
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phases_names,
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)
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self.pool.log_info("[BEGIN] %s" % (msg,))
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for phase in pipeline:
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phase.start()
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phase.stop()
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self.pool.log_info("[DONE ] %s" % (msg,))
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