Backported r91724 from the trunk:

- Moved exception MountedStorageError from ZODB.POSExceptions
  to Products.TemporaryFolder.mount (now its only client).

- LP #253362:  Moved Zope2-specific module, ZODB/Mount.py, to
  Products/TemporaryFolder/mount.py (its only client is
  Products/TemporaryFolder/TemporaryFolder.py).

- Removed spurious import-time dependencies from
  Products/ZODBMountPoint/MountedObject.py.

doc/CHANGES.txt

@@ -4,6 +4,20 @@ Zope Changes
   Change information for previous versions of Zope can be found in the
   file HISTORY.txt.
 
+  After Zope 2.11.3
+
+    Restructuring
+
+      - Moved exception MountedStorageError from ZODB.POSExceptions
+        to Products.TemporaryFolder.mount (now its only client).
+
+      - LP #253362:  Moved Zope2-specific module, ZODB/Mount.py, to
+        Products/TemporaryFolder/mount.py (its only client is
+        Products/TemporaryFolder/TemporaryFolder.py).
+
+      - Removed spurious import-time dependencies from
+        Products/ZODBMountPoint/MountedObject.py.
+
   Zope 2.11.3 (2009/05/04)
 
     Features added

lib/python/Products/TemporaryFolder/TemporaryFolder.py

@@ -10,8 +10,7 @@
 # FOR A PARTICULAR PURPOSE
 #
 ##############################################################################
-"""
-Mounted database support
+""" Mounted database support
 
 A MountedTemporaryFolder is an object that is a mount point.  It mounts a
 TemporaryStorage-backed database and masquerades as its root object.
@@ -20,23 +19,20 @@ point object is called, and that returns a Folder object that actually
 lives in another ZODB.
 
 To understand this fully, you'll need to read the source of
-ZODB.Mount.MountPoint.
+Products.TemporaryFolder.mount.MountPoint.
 
 $Id$
 """
 __version__='$Revision: 1.12 $'[11:-2]
 
-import os, os.path
-
-import Globals
-from Globals import HTMLFile
-from ZODB.Mount import MountPoint
+from App.special_dtml import DTMLFile
+from App.special_dtml import HTMLFile
 from OFS.Folder import Folder
 from OFS.SimpleItem import Item
-
-from ZODB.DB import DB
 from tempstorage.TemporaryStorage import TemporaryStorage
-from LowConflictConnection import LowConflictConnection
+from ZODB.DB import DB
+
+from Products.TemporaryFolder.mount import MountPoint
 
 ADD_TEMPORARY_FOLDER_PERM="Add Temporary Folder"
 
@@ -48,14 +44,15 @@ def constructTemporaryFolder(self, id, title=None, REQUEST=None):
     if REQUEST is not None:
         return self.manage_main(self, REQUEST, update_menu=1)
 
-
 constructTemporaryFolderForm=HTMLFile('dtml/addTemporaryFolder', globals())
 
+
 class SimpleTemporaryContainer(Folder):
     # dbtab-style container class
     meta_type = 'Temporary Folder'
     icon = 'misc_/TemporaryFolder/tempfolder.gif'
 
+
 class MountedTemporaryFolder(MountPoint, Item):
     """
     A mounted RAM database with a basic interface for displaying the
@@ -73,7 +70,7 @@ class MountedTemporaryFolder(MountPoint, Item):
         self.title = title
         MountPoint.__init__(self, path='/') # Eep
 
-    manage_traceback = Globals.DTMLFile('dtml/mountfail', globals())
+    manage_traceback = DTMLFile('dtml/mountfail', globals())
 
     def _createDB(self, db=None): # huh?  db=db was original
         """ Create a mounted RAM database """

lib/python/Products/ZODBMountPoint/MountedObject.py

@@ -24,14 +24,15 @@ from logging import getLogger
 
 import transaction
 
-import Globals
-import Acquisition
-from Acquisition import aq_base, aq_inner, aq_parent
+from App.class_init import default__class_init__ as InitializeClass
+from Acquisition import ImplicitAcquisitionWrapper
+from Acquisition import aq_base
+from Acquisition import aq_inner
+from Acquisition import aq_parent
 from AccessControl.ZopeGuards import guarded_getattr
 from OFS.SimpleItem import SimpleItem
 from OFS.Folder import Folder
 from Products.PageTemplates.PageTemplateFile import PageTemplateFile
-from ZODB.POSException import MountedStorageError, ConnectionStateError
 
 LOG = getLogger('Zope.ZODBMountPoint')
 
@@ -215,11 +216,6 @@ class MountedObject(SimpleItem):
     def _logConnectException(self):
         '''Records info about the exception that just occurred.
         '''
-        try:
-            from cStringIO import StringIO
-        except:
-            from StringIO import StringIO
-        import traceback
         exc = sys.exc_info()
         LOG.error('Failed to mount database. %s (%s)' % exc[:2], exc_info=exc)
         f=StringIO()
@@ -234,7 +230,7 @@ class MountedObject(SimpleItem):
         try:
             return self._getOrOpenObject(parent)
         except:
-            return Acquisition.ImplicitAcquisitionWrapper(self, parent)
+            return ImplicitAcquisitionWrapper(self, parent)
 
 
     def _test(self, parent):
@@ -279,7 +275,7 @@ class MountedObject(SimpleItem):
         return "%s(id=%s)" % (self.__class__.__name__, repr(self.id))
 
 
-Globals.InitializeClass(MountedObject)
+InitializeClass(MountedObject)
 
 
 def getMountPoint(ob):