DA.py 5.65 KB
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##############################################################################
# 
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
# 
# Copyright (c) Digital Creations.  All rights reserved.
# Copyright (c) Nexedi SARL 2004.  All rights reserved.
# 
# This license has been certified as Open Source(tm).
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# 
# 1. Redistributions in source code must retain the above copyright
#    notice, this list of conditions, and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions, and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
# 
# 3. Digital Creations requests that attribution be given to Zope
#    in any manner possible. Zope includes a "Powered by Zope"
#    button that is installed by default. While it is not a license
#    violation to remove this button, it is requested that the
#    attribution remain. A significant investment has been put
#    into Zope, and this effort will continue if the Zope community
#    continues to grow. This is one way to assure that growth.
# 
# 4. All advertising materials and documentation mentioning
#    features derived from or use of this software must display
#    the following acknowledgement:
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#      "This product includes software developed by Digital Creations
#      for use in the Z Object Publishing Environment
#      (http://www.zope.org/)."
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#    In the event that the product being advertised includes an
#    intact Zope distribution (with copyright and license included)
#    then this clause is waived.
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# 5. Names associated with Zope or Digital Creations must not be used to
#    endorse or promote products derived from this software without
#    prior written permission from Digital Creations.
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# 6. Modified redistributions of any form whatsoever must retain
#    the following acknowledgment:
# 
#      "This product includes software developed by Digital Creations
#      for use in the Z Object Publishing Environment
#      (http://www.zope.org/)."
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#    Intact (re-)distributions of any official Zope release do not
#    require an external acknowledgement.
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# 7. Modifications are encouraged but must be packaged separately as
#    patches to official Zope releases.  Distributions that do not
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# Disclaimer
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#   THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
#   EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
#   PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
#   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
#   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
#   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#   SUCH DAMAGE.
# 
# 
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations.  Specific
# attributions are listed in the accompanying credits file.
# 
##############################################################################

from Products.ZMySQLDA.DA import *
from db import DeferredDB

manage_addZMySQLDeferredConnectionForm=HTMLFile('deferredConnectionAdd',globals())

def manage_addZMySQLDeferredConnection(self, id, title,
                                connection_string,
                                check=None, REQUEST=None):
    """Add a DB connection to a folder"""
    self._setObject(id, DeferredConnection(id, title, connection_string, check))
    if REQUEST is not None: return self.manage_main(self,REQUEST)

class DeferredConnection(Connection):
    """
        Experimental MySQL DA which implements
        deferred SQL code execution to reduce locking issues
    """
    meta_type=title='Z %s Database Deferred Connection' % database_type
    
    def factory(self): return DeferredDB
    
    def connect(self,s):
        try: self._v_database_connection.close()
        except: pass
        self._v_connected=''
        DB=self.factory()
        ## No try. DO.
        self._v_database_connection=DeferredDB(s)
        self._v_connected=DateTime()
        return self
       
classes=('DA.DeferredConnection')

meta_types=(
    {'name':'Z %s Database Deferred Connection' % database_type,
     'action':'manage_addZ%sDeferredConnectionForm' % database_type,
     },
    )

folder_methods={
    'manage_addZMySQLDeferredConnection':
    manage_addZMySQLDeferredConnection,
    'manage_addZMySQLDeferredConnectionForm':
    manage_addZMySQLDeferredConnectionForm,
    }

__ac_permissions__=(
    ('Add Z MySQL Database Connections',
     ('manage_addZMySQLConnectionForm',
      'manage_addZMySQLConnection')),
    )

misc_={'conn': ImageFile(
    os.path.join('Shared','DC','ZRDB','www','DBAdapterFolder_icon.gif'))}

for icon in ('table', 'view', 'stable', 'what',
             'field', 'text','bin','int','float',
             'date','time','datetime'):
    misc_[icon]=ImageFile(os.path.join('icons','%s.gif') % icon, globals())