31 lines
653 B
Python
31 lines
653 B
Python
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# encoding: UTF-8
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from Queue import Queue
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from enum import Enum
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class PromiseResultType(Enum):
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Result = 1
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Exception = 2
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class Promise(object):
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"""
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用队列实现的一个简单的Promise类型
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"""
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def __init__(self):
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self._queue = Queue()
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def set_result(self, val):
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self._queue.put((PromiseResultType.Result, val))
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def get(self, timeout=None):
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res = self._queue.get(timeout=timeout)
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if res[0] == PromiseResultType.Result:
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return res[1]
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raise res[2]
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def set_exception(self, val):
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self._queue.put((PromiseResultType.Exception, val))
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