1 # Copyright (c) 2012 netzguerilla.net <iro@netzguerilla.net>

     2 # 

     3 # This file is part of Iro.

     4 # 

     5 # Permission is hereby granted, free of charge, to any person obtaining a copy of

     6 # this software and associated documentation files (the "Software"), to deal in

     7 # the Software without restriction, including without limitation the rights to use,

     8 # copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the

     9 # #Software, and to permit persons to whom the Software is furnished to do so,

    10 # subject to the following conditions:

    11 # 

    12 # The above copyright notice and this permission notice shall be included in

    13 # all copies or substantial portions of the Software.

    14 # 

    15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,

    16 # INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A

    17 # PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

    18 # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

    19 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

    20 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    21 

    22 from twisted.python.threadpool import ThreadPool

    23 from twisted.internet import threads

    24 

    25 class Pool:

    26     """wrapper class to handles a twisted threadpool"""

    27     def __init__(self,name,maxthreads):

    28         """

    29         :param string name: name of the threadpool

    30         :param integer maxthreads: how many thread a allowed at maximum

    31         """

    32         self.maxthreads = maxthreads

    33         self.pool =  ThreadPool(minthreads=1, maxthreads=maxthreads, name=name)

    34         self.reactor = None

    35 

    36     def start(self, reactor):

    37         """stats the pool and adds the pool.stop function to the stop procedure.

    38         

    39         :param reactor: a valid twisted reactor

    40         """

    41         self.pool.start()

    42         self.reactor = reactor

    43         self.reactor.addSystemEventTrigger('before', 'shutdown', self.pool.stop)

    44 

    45     def run(self,f,*args,**kwargs):

    46         """run a function in Twisted's thread pool"""

    47         return threads.deferToThreadPool(self.reactor, self.pool, f, *args, **kwargs)

    48 

    49 taskPool = Pool('task',5)

    50 """taskpool to handle sending data"""

    51 

    52 dbPool = Pool('database',5)

    53 """pool to handle database connection via sqlalchemy""" 

    54 

    55 pools=[taskPool,dbPool]

    56 """all available pools"""

    57 

    58 def startPool(reactor):

    59     '''run start function for all items in :attr:`pools`'''

    60     for pool in pools:

    61         pool.start(reactor)

    62 

    63 __all__=["Pool", "startPool", "dbPool", "taskPool", "pools"]