python-patterns/pool.py at master · SergeySimon/python-patterns · GitHub

49 lines (35 loc) · 1.24 KB

'''http://stackoverflow.com/questions/1514120/python-implementation-of-the-object-pool-design-pattern'''

class qObj():

_q = None

o = None

def __init__(self, dQ, autoGet = False):

self._q = dQ

if autoGet == True:

self.o = self._q.get()

def __enter__(self):

if self.o == None:

self.o = self._q.get()

return self.o

def __exit__(self, type, value, traceback):

if self.o != None:

self._q.put(self.o)

self.o = None

def __del__(self):

if self.o != None:

self._q.put(self.o)

self.o = None

if __name__ == "__main__":

import queue

def testObj(Q):

someObj = qObj(Q, True)

print('Inside func: {}'.format(someObj.o))

aQ = queue.Queue()

aQ.put("yam")

with qObj(aQ) as obj:

print("Inside with: {}".format(obj))

print('Outside with: {}'.format(aQ.get()))

aQ.put("sam")

testObj(aQ)

print('Outside func: {}'.format(aQ.get()))

if not aQ.empty():

print(aQ.get())

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