--- a/transaction.py	Mon Jan 04 18:40:30 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,127 +0,0 @@
-# copyright 2003-2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
-# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
-#
-# This file is part of CubicWeb.
-#
-# CubicWeb is free software: you can redistribute it and/or modify it under the
-# terms of the GNU Lesser General Public License as published by the Free
-# Software Foundation, either version 2.1 of the License, or (at your option)
-# any later version.
-#
-# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
-# details.
-#
-# You should have received a copy of the GNU Lesser General Public License along
-# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
-""" undoable transaction objects. """
-__docformat__ = "restructuredtext en"
-from cubicweb import _
-
-from cubicweb import RepositoryError
-
-
-ACTION_LABELS = {
-    'C': _('entity creation'),
-    'U': _('entity update'),
-    'D': _('entity deletion'),
-    'A': _('relation add'),
-    'R': _('relation removal'),
-    }
-
-
-class NoSuchTransaction(RepositoryError):
-    # Used by CubicWebException
-    msg = _("there is no transaction #%s")
-
-    def __init__(self, txuuid):
-        super(NoSuchTransaction, self).__init__(txuuid)
-        self.txuuid = txuuid
-
-class Transaction(object):
-    """an undoable transaction"""
-
-    def __init__(self, cnx, uuid, time, ueid):
-        self.cnx = cnx
-        self.uuid = uuid
-        self.datetime = time
-        self.user_eid = ueid
-
-    def _execute(self, *args, **kwargs):
-        """execute a query using either the req or the cnx"""
-        return self.cnx.execute(*args, **kwargs)
-
-
-    def __repr__(self):
-        return '<Transaction %s by %s on %s>' % (
-            self.uuid, self.user_eid, self.datetime)
-
-    def user(self):
-        """return the user entity which has done the transaction,
-        none if not found.
-        """
-        return self.cnx.find('CWUser', eid=self.user_eid).one()
-
-    def actions_list(self, public=True):
-        """return an ordered list of action effectued during that transaction
-
-        if public is true, return only 'public' action, eg not ones triggered
-        under the cover by hooks.
-        """
-        return self.cnx.transaction_actions(self.uuid, public)
-
-
-class AbstractAction(object):
-
-    def __init__(self, action, public, order):
-        self.action = action
-        self.public = public
-        self.order = order
-
-    @property
-    def label(self):
-        return ACTION_LABELS[self.action]
-
-    @property
-    def ertype(self):
-        """ Return the entity or relation type this action is related to"""
-        raise NotImplementedError(self)
-
-
-class EntityAction(AbstractAction):
-
-    def __init__(self, action, public, order, etype, eid, changes):
-        super(EntityAction, self).__init__(action, public, order)
-        self.etype = etype
-        self.eid = eid
-        self.changes = changes
-
-    def __repr__(self):
-        return '<%s: %s %s (%s)>' % (
-            self.label, self.eid, self.changes,
-            self.public and 'dbapi' or 'hook')
-
-    @property
-    def ertype(self):
-        """ Return the entity or relation type this action is related to"""
-        return self.etype
-
-
-class RelationAction(AbstractAction):
-
-    def __init__(self, action, public, order, rtype, eidfrom, eidto):
-        super(RelationAction, self).__init__(action, public, order)
-        self.rtype = rtype
-        self.eid_from = eidfrom
-        self.eid_to = eidto
-
-    def __repr__(self):
-        return '<%s: %s %s %s (%s)>' % (
-            self.label, self.eid_from, self.rtype, self.eid_to,
-            self.public and 'dbapi' or 'hook')
-
-    @property
-    def ertype(self):
-        """ Return the entity or relation type this action is related to"""
-        return self.rtype