130 lines
3.4 KiB
Python
130 lines
3.4 KiB
Python
import threading
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import queue
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import time
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class Job():
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def __init__(self, func, args=[], kwargs={}, name=None):
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if name == None:
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name = 'job'
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self.id = None
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self.name = name
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self.func = func
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self.args = args
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self.kwargs = kwargs
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self.results = None
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def run(self):
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self.results = self.func(*self.args, **self.kwargs)
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def set_name(self, name):
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self.name = name
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def set_id(self, jid):
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self.id = jid
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def __call__(self):
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self.run()
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class Worker(threading.Thread):
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def __init__(self, work_queue, finished_queue):
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super(Worker, self).__init__()
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self.queue = work_queue
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self.finished = finished_queue
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self.terminate = False
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self.daemon=True
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def stop(self):
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self.terminate = True
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def run(self):
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while not self.terminate:
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try:
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task = self.queue.get(timeout=1)
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task.run()
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self.queue.task_done()
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self.finished.put(task)
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except queue.Empty:
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pass
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except KeyboardInterrupt:
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print("you stop the threading")
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class ParallelHost():
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def __init__(self, num_threads=8):
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self.num_threads = num_threads
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self.workers = []
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self.tasks = queue.Queue()
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self.results = queue.Queue()
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self.rets = {}
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self.id = 0
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for i in range(self.num_threads):
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worker = Worker(self.tasks, self.results)
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self.workers.append(worker)
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for worker in self.workers:
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worker.start()
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def __del__(self):
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self.stop('kill')
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# soft stop: wait until all job done
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# hard stop: stop even with unfinished job
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# kill stop: whatever the thread is doing, exit.
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def stop(self, mode='soft'):
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print('Trying to stop.')
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if mode == 'soft':
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self.tasks.join()
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print('All job finished.')
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for worker in self.workers:
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worker.stop()
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if mode == 'kill':
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worker.join(0.01)
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def commit(self, job):
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self.id += 1
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job.set_id(self.id)
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self.tasks.put(job)
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return self.id
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def add_job(self, func, args=[], kwargs={}, name=None):
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job = Job(func, args, kwargs, name)
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return self.commit(job)
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def collect_all(self):
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while not self.results.empty():
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task = self.results.get()
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jid = task.id
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self.rets[jid] = task.results
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def get_result(self, jid, block=False):
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if jid in self.rets:
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ret = self.rets[jid]
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del self.rets[jid]
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return ret
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while True:
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if self.results.empty() and not block:
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break
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task = self.results.get()
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if task.jid == jid:
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return task.results
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else:
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self.rets[task.jid] = task.results
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def clear_results(self):
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while not self.results.empty():
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self.results.get()
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self.rets = {}
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daemon = ParallelHost()
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if __name__ == '__main__':
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host = ParallelHost()
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def loop_print(info, num):
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for i in range(num):
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print(info + ':' + str(i))
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time.sleep(1)
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for i in range(10):
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host.add_job(loop_print, ["loop_print_{0}".format(i), 5])
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host.terminate('kill')
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