1 ### -*- coding: utf-8 -*- ####################################################

     2 ##############################################################################

     3 #

     4 # Copyright (c) 2008-2012 Thierry Florac <tflorac AT ulthar.net>

     5 # All Rights Reserved.

     6 #

     7 # This software is subject to the provisions of the Zope Public License,

     8 # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

     9 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

    10 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    11 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

    12 # FOR A PARTICULAR PURPOSE.

    13 #

    14 ##############################################################################

    15 

    16 __docformat__ = "restructuredtext"

    17 

    18 # import standard packages

    19 

    20 # import Zope3 interfaces

    21 from persistent.interfaces import IPersistent

    22 from transaction.interfaces import ITransactionManager

    23 from ZODB.interfaces import IConnection

    24 

    25 # import local interfaces

    26 

    27 # import Zope3 packages

    28 from zope.component import adapter

    29 from zope.interface import implementer

    30 

    31 # import local packages

    32 

    33 

    34 # IPersistent adapters copied from zc.twist package

    35 # also register this for adapting from IConnection

    36 @adapter(IPersistent)

    37 @implementer(ITransactionManager)

    38 def transactionManager(obj):

    39     conn = IConnection(obj) # typically this will be

    40                             # zope.app.keyreference.persistent.connectionOfPersistent

    41     try:

    42         return conn.transaction_manager

    43     except AttributeError:

    44         return conn._txn_mgr

    45         # or else we give up; who knows.  transaction_manager is the more

    46         # recent spelling.