vregistry.py
author Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
Tue, 04 Aug 2009 18:58:38 +0200
changeset 2689 44f041222d0f
parent 2662 87aed8cb7ff6
child 2760 30063071aee0
child 2769 1800aa0bf396
permissions -rw-r--r--
[autoreload] handle uicfg reloading properly with the new event / callback mechanism
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"""
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* the vregistry handles various types of objects interacting
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  together. The vregistry handles registration of dynamically loaded
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  objects and provides a convenient api to access those objects
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  according to a context
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* to interact with the vregistry, objects should inherit from the
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  AppObject abstract class
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* the selection procedure has been generalized by delegating to a
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  selector, which is responsible to score the appobject according to the
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  current state (req, rset, row, col). At the end of the selection, if
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  a appobject class has been found, an instance of this class is
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  returned. The selector is instantiated at appobject registration
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:organization: Logilab
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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import sys
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from os import listdir, stat
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from os.path import dirname, join, realpath, split, isdir, exists
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from logging import getLogger
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from warnings import warn
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from logilab.common.deprecation import deprecated, class_moved
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from logilab.common.logging_ext import set_log_methods
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from cubicweb import CW_SOFTWARE_ROOT
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from cubicweb import (RegistryNotFound, ObjectNotFound, NoSelectableObject,
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                      RegistryOutOfDate)
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from cubicweb.appobject import AppObject
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def _toload_info(path, extrapath, _toload=None):
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    """return a dictionary of <modname>: <modpath> and an ordered list of
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    (file, module name) to load
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    """
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    from logilab.common.modutils import modpath_from_file
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    if _toload is None:
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        assert isinstance(path, list)
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        _toload = {}, []
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    for fileordir in path:
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        if isdir(fileordir) and exists(join(fileordir, '__init__.py')):
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            subfiles = [join(fileordir, fname) for fname in listdir(fileordir)]
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            _toload_info(subfiles, extrapath, _toload)
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        elif fileordir[-3:] == '.py':
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            modname = '.'.join(modpath_from_file(fileordir, extrapath))
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            _toload[0][modname] = fileordir
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            _toload[1].append((fileordir, modname))
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    return _toload
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class Registry(dict):
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    def __init__(self, config):
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        super(Registry, self).__init__()
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        self.config = config
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    def __getitem__(self, name):
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        """return the registry (dictionary of class objects) associated to
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        this name
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        """
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        try:
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            return super(Registry, self).__getitem__(name)
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        except KeyError:
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            raise ObjectNotFound(name), None, sys.exc_info()[-1]
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    def register(self, obj, oid=None, clear=False):
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        """base method to add an object in the registry"""
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        assert not '__abstract__' in obj.__dict__
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        oid = oid or obj.id
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        assert oid
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        if clear:
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            appobjects = self[oid] =  []
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        else:
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            appobjects = self.setdefault(oid, [])
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        # registered() is technically a classmethod but is not declared
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        # as such because we need to compose registered in some cases
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        appobject = obj.registered.im_func(obj, self)
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        assert not appobject in appobjects, \
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               'object %s is already registered' % appobject
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        assert callable(appobject.__select__), appobject
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        appobjects.append(appobject)
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    def register_and_replace(self, obj, replaced):
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        # XXXFIXME this is a duplication of unregister()
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        # remove register_and_replace in favor of unregister + register
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        # or simplify by calling unregister then register here
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        if hasattr(replaced, 'classid'):
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            replaced = replaced.classid()
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        registered_objs = self.get(obj.id, ())
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        for index, registered in enumerate(registered_objs):
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            if registered.classid() == replaced:
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                del registered_objs[index]
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                break
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        else:
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            self.warning('trying to replace an unregistered view %s by %s',
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   102
                         replaced, obj)
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   103
        self.register(obj)
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   104
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   105
    def unregister(self, obj):
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   106
        oid = obj.classid()
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   107
        for registered in self.get(obj.id, ()):
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   108
            # use classid() to compare classes because vreg will probably
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   109
            # have its own version of the class, loaded through execfile
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   110
            if registered.classid() == oid:
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   111
                # XXX automatic reloading management
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   112
                self[obj.id].remove(registered)
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   113
                break
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   114
        else:
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   115
            self.warning('can\'t remove %s, no id %s in the registry',
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   116
                         oid, obj.id)
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   117
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   118
    def all_objects(self):
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   119
        """return a list containing all objects in this registry.
0
b97547f5f1fa Showtime !
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   120
        """
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   121
        result = []
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   122
        for objs in self.values():
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   123
            result += objs
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   124
        return result
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   125
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   126
    # dynamic selection methods ################################################
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   127
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   128
    def object_by_id(self, oid, *args, **kwargs):
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   129
        """return object with the given oid. Only one object is expected to be
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   130
        found.
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   131
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   132
        raise `ObjectNotFound` if not object with id <oid> in <registry>
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   133
        raise `AssertionError` if there is more than one object there
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   134
        """
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   135
        objects = self[oid]
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   136
        assert len(objects) == 1, objects
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   137
        return objects[0](*args, **kwargs)
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   138
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   139
    def select(self, oid, *args, **kwargs):
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   140
        """return the most specific object among those with the given oid
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   141
        according to the given context.
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   142
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   143
        raise `ObjectNotFound` if not object with id <oid> in <registry>
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   144
        raise `NoSelectableObject` if not object apply
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   145
        """
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   146
        return self.select_best(self[oid], *args, **kwargs)
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   147
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   148
    def select_object(self, oid, *args, **kwargs):
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   149
        """return the most specific object among those with the given oid
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   150
        according to the given context, or None if no object applies.
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   151
        """
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   152
        try:
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   153
            return self.select(oid, *args, **kwargs)
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   154
        except (NoSelectableObject, ObjectNotFound):
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   155
            return None
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   156
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   157
    def possible_objects(self, *args, **kwargs):
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   158
        """return an iterator on possible objects in this registry for the given
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   159
        context
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   160
        """
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   161
        for appobjects in self.itervalues():
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   162
            try:
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   163
                yield self.select_best(appobjects, *args, **kwargs)
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   164
            except NoSelectableObject:
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   165
                continue
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   166
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   167
    def select_best(self, appobjects, *args, **kwargs):
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   168
        """return an instance of the most specific object according
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   169
        to parameters
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   170
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   171
        raise `NoSelectableObject` if not object apply
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   172
        """
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   173
        if len(args) > 1:
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   174
            warn('only the request param can not be named when calling select',
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diff changeset
   175
                 DeprecationWarning, stacklevel=3)
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   176
        score, winners = 0, []
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   177
        for appobject in appobjects:
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   178
            appobjectscore = appobject.__select__(appobject, *args, **kwargs)
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   179
            if appobjectscore > score:
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   180
                score, winners = appobjectscore, [appobject]
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   181
            elif appobjectscore > 0 and appobjectscore == score:
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   182
                winners.append(appobject)
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   183
        if not winners:
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   184
            raise NoSelectableObject('args: %s\nkwargs: %s %s'
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   185
                                     % (args, kwargs.keys(),
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   186
                                        [repr(v) for v in appobjects]))
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   187
        if len(winners) > 1:
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   188
            if self.config.mode == 'installed':
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   189
                self.error('select ambiguity, args: %s\nkwargs: %s %s',
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   190
                           args, kwargs.keys(), [repr(v) for v in winners])
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   191
            else:
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   192
                raise Exception('select ambiguity, args: %s\nkwargs: %s %s'
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   193
                                % (args, kwargs.keys(),
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                                   [repr(v) for v in winners]))
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        # return the result of calling the appobject
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        return winners[0](*args, **kwargs)
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class VRegistry(dict):
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    """class responsible to register, propose and select the various
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    elements used to build the web interface. Currently, we have templates,
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    views, actions and components.
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    """
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    def __init__(self, config):
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        super(VRegistry, self).__init__()
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        self.config = config
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    def reset(self, force_reload=None):
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        self.clear()
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        self._lastmodifs = {}
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    def __getitem__(self, name):
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        """return the registry (dictionary of class objects) associated to
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        this name
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        """
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        try:
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            return super(VRegistry, self).__getitem__(name)
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        except KeyError:
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            raise RegistryNotFound(name), None, sys.exc_info()[-1]
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    # dynamic selection methods ################################################
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    @deprecated('use vreg[registry].object_by_id(oid, *args, **kwargs)')
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    def object_by_id(self, registry, oid, *args, **kwargs):
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        """return object in <registry>.<oid>
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        raise `ObjectNotFound` if not object with id <oid> in <registry>
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        raise `AssertionError` if there is more than one object there
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        """
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        return self[registry].object_by_id(oid)
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    @deprecated('use vreg[registry].select(oid, *args, **kwargs)')
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    def select(self, registry, oid, *args, **kwargs):
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        """return the most specific object in <registry>.<oid> according to
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        the given context
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        raise `ObjectNotFound` if not object with id <oid> in <registry>
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        raise `NoSelectableObject` if not object apply
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        """
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        return self[registry].select(oid, *args, **kwargs)
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   242
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    @deprecated('use vreg[registry].select_object(oid, *args, **kwargs)')
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    def select_object(self, registry, oid, *args, **kwargs):
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        """return the most specific object in <registry>.<oid> according to
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        the given context, or None if no object apply
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        """
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        return self[registry].select_object(oid, *args, **kwargs)
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   249
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    @deprecated('use vreg[registry].possible_objects(*args, **kwargs)')
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    def possible_objects(self, registry, *args, **kwargs):
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        """return an iterator on possible objects in <registry> for the given
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        context
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        """
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        return self[registry].possible_objects(*args, **kwargs)
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    # methods for explicit (un)registration ###################################
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   258
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    # default class, when no specific class set
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    REGISTRY_FACTORY = {None: Registry}
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    def registry_class(self, regid):
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        try:
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            return self.REGISTRY_FACTORY[regid]
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        except KeyError:
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            return self.REGISTRY_FACTORY[None]
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   267
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    def setdefault(self, regid):
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        try:
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            return self[regid]
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        except KeyError:
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            self[regid] = self.registry_class(regid)(self.config)
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            return self[regid]
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#     def clear(self, key):
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   276
#         regname, oid = key.split('.')
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parents: 665
diff changeset
   277
#         self[regname].pop(oid, None)
2058
7ef12c03447c nicer vreg api, try to make rset an optional named argument in select and derivated (including selectors)
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parents: 2035
diff changeset
   278
695
356da23c57f1 try a register_all method
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parents: 693
diff changeset
   279
    def register_all(self, objects, modname, butclasses=()):
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parents: 693
diff changeset
   280
        for obj in objects:
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parents: 693
diff changeset
   281
            try:
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parents: 693
diff changeset
   282
                if obj.__module__ != modname or obj in butclasses:
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parents: 693
diff changeset
   283
                    continue
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parents: 693
diff changeset
   284
                oid = obj.id
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parents: 693
diff changeset
   285
            except AttributeError:
356da23c57f1 try a register_all method
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parents: 693
diff changeset
   286
                continue
2587
79bbc5045288 [vreg] consider __abstract__ in register_all
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2308
diff changeset
   287
            if oid and not '__abstract__' in obj.__dict__:
695
356da23c57f1 try a register_all method
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parents: 693
diff changeset
   288
                self.register(obj)
1433
091ac3ba5d51 remove trailing white spaces
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parents: 1432
diff changeset
   289
668
61b2328f9ed9 rename registration callback, clear argument to register
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parents: 665
diff changeset
   290
    def register(self, obj, registryname=None, oid=None, clear=False):
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
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parents: 660
diff changeset
   291
        """base method to add an object in the registry"""
707
21a59b468f1a __selectors__ -> __select__
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parents: 698
diff changeset
   292
        assert not '__abstract__' in obj.__dict__
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   293
        registryname = registryname or obj.__registry__
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   294
        registry = self.setdefault(registryname)
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   295
        registry.register(obj, oid=oid, clear=clear)
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   296
        try:
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   297
            vname = obj.__name__
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   298
        except AttributeError:
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   299
            vname = obj.__class__.__name__
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   300
        self.debug('registered appobject %s in registry %s with id %s',
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   301
                   vname, registryname, oid)
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   302
        self._loadedmods[obj.__module__]['%s.%s' % (obj.__module__, oid)] = obj
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   303
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   304
    def unregister(self, obj, registryname=None):
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   305
        self[registryname or obj.__registry__].unregister(obj)
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   306
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   307
    def register_and_replace(self, obj, replaced, registryname=None):
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   308
        self[registryname or obj.__registry__].register_and_replace(obj, replaced)
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   309
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   310
    # initialization methods ###################################################
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   311
2035
946ed7349e1a bugfix: extrapath is optional arg for init_registration
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 2025
diff changeset
   312
    def init_registration(self, path, extrapath=None):
1316
6d71d38822ee introduce init_registration method and call it in repo initialization
sylvain.thenault@logilab.fr
parents: 1310
diff changeset
   313
        # compute list of all modules that have to be loaded
2025
010a4b0fe855 fix lookup of files to load when using CW_CUBES_PATH
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   314
        self._toloadmods, filemods = _toload_info(path, extrapath)
2651
3ad936634d2a [registry] when a source file is changed, reset and reload the whole registry
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 2589
diff changeset
   315
        # XXX is _loadedmods still necessary ? It seems like it's useful
3ad936634d2a [registry] when a source file is changed, reset and reload the whole registry
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 2589
diff changeset
   316
        #     to avoid loading same module twice, especially with the
3ad936634d2a [registry] when a source file is changed, reset and reload the whole registry
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 2589
diff changeset
   317
        #     _load_ancestors_then_object logic but this needs to be checked
1316
6d71d38822ee introduce init_registration method and call it in repo initialization
sylvain.thenault@logilab.fr
parents: 1310
diff changeset
   318
        self._loadedmods = {}
6d71d38822ee introduce init_registration method and call it in repo initialization
sylvain.thenault@logilab.fr
parents: 1310
diff changeset
   319
        return filemods
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   320
2025
010a4b0fe855 fix lookup of files to load when using CW_CUBES_PATH
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   321
    def register_objects(self, path, force_reload=None, extrapath=None):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   322
        if force_reload is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   323
            force_reload = self.config.mode == 'dev'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   324
        elif not force_reload:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   325
            # force_reload == False usually mean modules have been reloaded
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   326
            # by another connection, so we want to update the registry
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   327
            # content even if there has been no module content modification
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   328
            self.reset()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   329
        # need to clean sys.path this to avoid import confusion pb (i.e.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   330
        # having the same module loaded as 'cubicweb.web.views' subpackage and
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   331
        # as views'  or 'web.views' subpackage
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   332
        # this is mainly for testing purpose, we should'nt need this in
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   333
        # production environment
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   334
        for webdir in (join(dirname(realpath(__file__)), 'web'),
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   335
                       join(dirname(__file__), 'web')):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   336
            if webdir in sys.path:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   337
                sys.path.remove(webdir)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   338
        if CW_SOFTWARE_ROOT in sys.path:
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   339
            sys.path.remove(CW_SOFTWARE_ROOT)
2476
1294a6bdf3bf application -> instance where it makes sense
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2381
diff changeset
   340
        # load views from each directory in the instance's path
2025
010a4b0fe855 fix lookup of files to load when using CW_CUBES_PATH
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   341
        filemods = self.init_registration(path, extrapath)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   342
        change = False
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   343
        for filepath, modname in filemods:
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   344
            if self.load_file(filepath, modname, force_reload):
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   345
                change = True
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   346
        return change
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   347
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   348
    def load_file(self, filepath, modname, force_reload=False):
2651
3ad936634d2a [registry] when a source file is changed, reset and reload the whole registry
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 2589
diff changeset
   349
        """load app objects from a python file"""
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   350
        from logilab.common.modutils import load_module_from_name
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   351
        if modname in self._loadedmods:
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   352
            return
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   353
        self._loadedmods[modname] = {}
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   354
        try:
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   355
            modified_on = stat(filepath)[-2]
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   356
        except OSError:
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   357
            # this typically happens on emacs backup files (.#foo.py)
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   358
            self.warning('Unable to load %s. It is likely to be a backup file',
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   359
                         filepath)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   360
            return False
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   361
        if filepath in self._lastmodifs:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   362
            # only load file if it was modified
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   363
            if modified_on <= self._lastmodifs[filepath]:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   364
                return
2651
3ad936634d2a [registry] when a source file is changed, reset and reload the whole registry
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 2589
diff changeset
   365
            # if it was modified, raise RegistryOutOfDate to reload everything
3ad936634d2a [registry] when a source file is changed, reset and reload the whole registry
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 2589
diff changeset
   366
            self.info('File %s changed since last visit', filepath)
3ad936634d2a [registry] when a source file is changed, reset and reload the whole registry
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 2589
diff changeset
   367
            raise RegistryOutOfDate()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   368
        # load the module
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   369
        module = load_module_from_name(modname, use_sys=not force_reload)
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   370
        self.load_module(module)
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   371
        self._lastmodifs[filepath] = modified_on
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   372
        return True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   373
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   374
    def load_module(self, module):
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   375
        self.info('loading %s', module)
668
61b2328f9ed9 rename registration callback, clear argument to register
sylvain.thenault@logilab.fr
parents: 665
diff changeset
   376
        if hasattr(module, 'registration_callback'):
61b2328f9ed9 rename registration callback, clear argument to register
sylvain.thenault@logilab.fr
parents: 665
diff changeset
   377
            module.registration_callback(self)
660
5233a9457f6b work in progress, draft for manual registration
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 652
diff changeset
   378
        else:
5233a9457f6b work in progress, draft for manual registration
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 652
diff changeset
   379
            for objname, obj in vars(module).items():
5233a9457f6b work in progress, draft for manual registration
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 652
diff changeset
   380
                if objname.startswith('_'):
5233a9457f6b work in progress, draft for manual registration
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 652
diff changeset
   381
                    continue
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   382
                self._load_ancestors_then_object(module.__name__, obj)
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   383
        self.debug('loaded %s', module)
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   384
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   385
    def _load_ancestors_then_object(self, modname, obj):
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   386
        # imported classes
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   387
        objmodname = getattr(obj, '__module__', None)
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   388
        if objmodname != modname:
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   389
            if objmodname in self._toloadmods:
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   390
                self.load_file(self._toloadmods[objmodname], objmodname)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   391
            return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   392
        # skip non registerable object
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   393
        try:
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   394
            if not issubclass(obj, AppObject):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   395
                return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   396
        except TypeError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   397
            return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   398
        objname = '%s.%s' % (modname, obj.__name__)
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   399
        if objname in self._loadedmods[modname]:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   400
            return
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   401
        self._loadedmods[modname][objname] = obj
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   402
        for parent in obj.__bases__:
1310
99dfced5673e fix vobjects registration to deal with objects inter-dependancy
sylvain.thenault@logilab.fr
parents: 1282
diff changeset
   403
            self._load_ancestors_then_object(modname, parent)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   404
        self.load_object(obj)
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   405
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   406
    def load_object(self, obj):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   407
        try:
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   408
            self.register_appobject_class(obj)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   409
        except Exception, ex:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   410
            if self.config.mode in ('test', 'dev'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   411
                raise
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   412
            self.exception('appobject %s registration failed: %s', obj, ex)
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   413
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   414
    # old automatic registration XXX deprecated ###############################
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   415
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   416
    def register_appobject_class(self, cls):
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   417
        """handle appobject class registration
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   418
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   419
        appobject class with __abstract__ == True in their local dictionnary or
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   420
        with a name starting starting by an underscore are not registered.
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   421
        Also a appobject class needs to have __registry__ and id attributes set
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   422
        to a non empty string to be registered.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   423
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   424
        if (cls.__dict__.get('__abstract__') or cls.__name__[0] == '_'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   425
            or not cls.__registry__ or not cls.id):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   426
            return
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   427
        regname = cls.__registry__
1046
52ee022d87e3 simplify registry options to disable some appobjects to use a single option
sylvain.thenault@logilab.fr
parents: 946
diff changeset
   428
        if '%s.%s' % (regname, cls.id) in self.config['disable-appobjects']:
665
1305da1ce3f9 reorganize a bit, some cleanup and fixes
sylvain.thenault@logilab.fr
parents: 660
diff changeset
   429
            return
1432
2c3711d4570b drop hopeless registerer bw compat
sylvain.thenault@logilab.fr
parents: 1316
diff changeset
   430
        self.register(cls)
1433
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   431
091ac3ba5d51 remove trailing white spaces
sylvain.thenault@logilab.fr
parents: 1432
diff changeset
   432
# init logging
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   433
set_log_methods(VRegistry, getLogger('cubicweb.vreg'))
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2589
diff changeset
   434
set_log_methods(Registry, getLogger('cubicweb.registry'))
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   435
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   436
835
7dcb11dd443e fix relation_possible, ensure we return int
sylvain.thenault@logilab.fr
parents: 827
diff changeset
   437
# XXX bw compat functions #####################################################
693
cf0817dfc787 reimplements chainall/chainfirst using [And/Or], implemenent search_selector function on Selector base class
sylvain.thenault@logilab.fr
parents: 686
diff changeset
   438
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   439
from cubicweb.appobject import objectify_selector, AndSelector, OrSelector, Selector
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   440
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   441
objectify_selector = deprecated('objectify_selector has been moved to appobject module')(objectify_selector)
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   442
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   443
Selector = class_moved(Selector)
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   444
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   445
@deprecated('use & operator (binary and)')
693
cf0817dfc787 reimplements chainall/chainfirst using [And/Or], implemenent search_selector function on Selector base class
sylvain.thenault@logilab.fr
parents: 686
diff changeset
   446
def chainall(*selectors, **kwargs):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   447
    """return a selector chaining given selectors. If one of
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   448
    the selectors fail, selection will fail, else the returned score
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   449
    will be the sum of each selector'score
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   450
    """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   451
    assert selectors
759
e044f28372bd chainall / chainfirst ensures selectors are instantiated
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 741
diff changeset
   452
    # XXX do we need to create the AndSelector here, a tuple might be enough
780
5b6c93816871 fix selector search and refactor auto-instantiation
sylvain.thenault@logilab.fr
parents: 760
diff changeset
   453
    selector = AndSelector(*selectors)
693
cf0817dfc787 reimplements chainall/chainfirst using [And/Or], implemenent search_selector function on Selector base class
sylvain.thenault@logilab.fr
parents: 686
diff changeset
   454
    if 'name' in kwargs:
cf0817dfc787 reimplements chainall/chainfirst using [And/Or], implemenent search_selector function on Selector base class
sylvain.thenault@logilab.fr
parents: 686
diff changeset
   455
        selector.__name__ = kwargs['name']
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   456
    return selector
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   457
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   458
@deprecated('use | operator (binary or)')
693
cf0817dfc787 reimplements chainall/chainfirst using [And/Or], implemenent search_selector function on Selector base class
sylvain.thenault@logilab.fr
parents: 686
diff changeset
   459
def chainfirst(*selectors, **kwargs):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   460
    """return a selector chaining given selectors. If all
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   461
    the selectors fail, selection will fail, else the returned score
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   462
    will be the first non-zero selector score
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   463
    """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   464
    assert selectors
780
5b6c93816871 fix selector search and refactor auto-instantiation
sylvain.thenault@logilab.fr
parents: 760
diff changeset
   465
    selector = OrSelector(*selectors)
693
cf0817dfc787 reimplements chainall/chainfirst using [And/Or], implemenent search_selector function on Selector base class
sylvain.thenault@logilab.fr
parents: 686
diff changeset
   466
    if 'name' in kwargs:
cf0817dfc787 reimplements chainall/chainfirst using [And/Or], implemenent search_selector function on Selector base class
sylvain.thenault@logilab.fr
parents: 686
diff changeset
   467
        selector.__name__ = kwargs['name']
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   468
    return selector