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 decorator import decorator

    23 import sqlalchemy

    24 class Data:

    25     """A very simple class to save the thread pool for database requests"""

    26     def __init__(self):

    27         self.pool =  None

    28 

    29 data = Data()

    30 """holds connection to the actual thread pool for the database requests"""

    31 

    32 def setPool(pool): 

    33     """setting the thread pool"""

    34     data.pool = pool

    35 

    36 @decorator

    37 def runInDBPool(f,*args,**kwargs):

    38     """Decorator to run DB queries in Twisted's thread pool.

    39     

    40     If last argument is a session object, the function is called directly.

    41     """

    42     if isinstance(args[-1],sqlalchemy.orm.session.Session):

    43         return f(*args,**kwargs)

    44     else:

    45         return data.pool.run(f, *args, **kwargs)

    46 

    47