server/session.py
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Fri, 09 Jan 2009 16:56:51 +0100
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child 716 03ffbe9c5183
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[FAQ] debugging selectors : a new faq entry
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"""Repository users' and internal' sessions.
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:organization: Logilab
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:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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"""
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__docformat__ = "restructuredtext en"
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import sys
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import threading
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from time import time
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from types import NoneType
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from decimal import Decimal
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from mx.DateTime import DateTimeType, DateTimeDeltaType
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from rql.nodes import VariableRef, Function
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from yams import BASE_TYPES
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from cubicweb import RequestSessionMixIn, Binary
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from cubicweb.dbapi import ConnectionProperties
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from cubicweb.common.utils import make_uid
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from cubicweb.server.rqlrewrite import RQLRewriter
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def etype_from_pyobj(value):
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    """guess yams type from python value"""
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    # note:
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    # * Password is not selectable so no problem)
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    # * use type(value) and not value.__class__ since mx instances have no
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    #   __class__ attribute
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    # * XXX Date, Time
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    return {bool: 'Boolean',
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            int: 'Int',
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            long: 'Int',
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            float: 'Float',
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            Decimal: 'Decimal',
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            unicode: 'String',
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            NoneType: None,
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            Binary: 'Bytes',
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            DateTimeType: 'Datetime',
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            DateTimeDeltaType: 'Interval',
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            }[type(value)]
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def is_final(rqlst, variable, args):
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    # try to find if this is a final var or not
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    for select in rqlst.children:
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        for sol in select.solutions:
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            etype = variable.get_type(sol, args)
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            if etype is None:
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                continue
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            if etype in BASE_TYPES:
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                return True
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            return False   
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def _make_description(selected, args, solution):
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    """return a description for a result set"""
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    description = []
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    for term in selected:
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        description.append(term.get_type(solution, args))
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    return description
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#XXX rql <= 0.18.3 bw compat
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from rql import stmts
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if not hasattr(stmts.Union, 'get_variable_variables'):
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    def _union_get_variable_variables(self):
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        """return the set of variable names which take different type according to
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        the solution
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        """
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        change = set()
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        values = {}
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        for select in self.children:
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            change.update(select.get_variable_variables(values))
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        return change
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    stmts.Union.get_variable_variables = _union_get_variable_variables
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    def _select_get_variable_variables(self, _values=None):
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        """return the set of variable names which take different type according to
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        the solution
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        """
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        change = set()
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        if _values is None:
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            _values = {}
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        for solution in self.solutions:
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            for vname, etype in solution.iteritems():
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                if not vname in _values:
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                    _values[vname] = etype
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                elif _values[vname] != etype:
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                    change.add(vname)
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        return change
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    stmts.Select.get_variable_variables = _select_get_variable_variables
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class Session(RequestSessionMixIn):
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    """tie session id, user, connections pool and other session data all
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    together
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    """
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    def __init__(self, user, repo, cnxprops=None, _id=None):
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        super(Session, self).__init__(repo.vreg)
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        self.id = _id or make_uid(user.login.encode('UTF8'))
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        cnxprops = cnxprops or ConnectionProperties('inmemory')
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        self.user = user
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        self.repo = repo
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        self.cnxtype = cnxprops.cnxtype
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        self.creation = time()
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        self.timestamp = self.creation
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        self.is_internal_session = False
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        self.is_super_session = False
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        # short cut to querier .execute method
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        self._execute = repo.querier.execute
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        # shared data, used to communicate extra information between the client
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        # and the rql server
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        self.data = {}
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        # i18n initialization
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        self.set_language(cnxprops.lang)
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        self._threaddata = threading.local()
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    def get_mode(self):
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        return getattr(self._threaddata, 'mode', 'read')
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    def set_mode(self, value):
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        self._threaddata.mode = value
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    # transaction mode (read/write), resetted to read on commit / rollback
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    mode = property(get_mode, set_mode)
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    def get_commit_state(self):
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        return getattr(self._threaddata, 'commit_state', None)
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    def set_commit_state(self, value):
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        self._threaddata.commit_state = value
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    commit_state = property(get_commit_state, set_commit_state)
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    # set according to transaction mode for each query
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    @property
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    def pool(self):
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        return getattr(self._threaddata, 'pool', None)
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    # pending transaction operations
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    @property
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    def pending_operations(self):
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        try:
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            return self._threaddata.pending_operations
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        except AttributeError:
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            self._threaddata.pending_operations = []
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            return self._threaddata.pending_operations
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    # rql rewriter
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    @property
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    def rql_rewriter(self):
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        try:
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            return self._threaddata._rewriter
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   148
        except AttributeError:
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            self._threaddata._rewriter = RQLRewriter(self.repo.querier, self)
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            return self._threaddata._rewriter
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   151
    
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    # transaction queries data
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    @property
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    def _query_data(self):
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   155
        try:
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            return self._threaddata._query_data
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   157
        except AttributeError:
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            self._threaddata._query_data = {}
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            return self._threaddata._query_data
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   160
    
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    def set_language(self, language):
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        """i18n configuration for translation"""
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   163
        vreg = self.vreg
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   164
        language = language or self.user.property_value('ui.language')
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   165
        try:
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   166
            self._ = self.__ = vreg.config.translations[language]
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   167
        except KeyError:
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   168
            language = vreg.property_value('ui.language')
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   169
            try:
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   170
                self._ = self.__ = vreg.config.translations[language]
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   171
            except KeyError:
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                self._ = self.__ = unicode
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   173
        self.lang = language
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   174
        
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   175
    def change_property(self, prop, value):
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   176
        assert prop == 'lang' # this is the only one changeable property for now
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   177
        self.set_language(value)
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   178
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    def __str__(self):
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        return '<%ssession %s (%s 0x%x)>' % (self.cnxtype, self.user.login, 
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                                             self.id, id(self))
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   182
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   183
    def etype_class(self, etype):
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        """return an entity class for the given entity type"""
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   185
        return self.vreg.etype_class(etype)
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   186
    
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   187
    def entity(self, eid):
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   188
        """return a result set for the given eid"""
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   189
        return self.eid_rset(eid).get_entity(0, 0)
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   190
        
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   191
    def _touch(self):
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   192
        """update latest session usage timestamp and reset mode to read
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diff changeset
   193
        """
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   194
        self.timestamp = time()
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   195
        self.local_perm_cache.clear()
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   196
        self._threaddata.mode = 'read'
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diff changeset
   197
        
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   198
    def set_pool(self):
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   199
        """the session need a pool to execute some queries"""
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diff changeset
   200
        if self.pool is None:
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diff changeset
   201
            self._threaddata.pool = self.repo._get_pool()
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diff changeset
   202
            try:                
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diff changeset
   203
                self._threaddata.pool.pool_set(self)
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diff changeset
   204
            except:
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diff changeset
   205
                self.repo._free_pool(self.pool)
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   206
                self._threaddata.pool = None
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diff changeset
   207
                raise
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diff changeset
   208
        return self._threaddata.pool
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parents:
diff changeset
   209
            
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   210
    def reset_pool(self):
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diff changeset
   211
        """the session has no longer using its pool, at least for some time
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diff changeset
   212
        """
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diff changeset
   213
        # pool may be none if no operation has been done since last commit
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   214
        # or rollback
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diff changeset
   215
        if self.pool is not None and self.mode == 'read':
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diff changeset
   216
            # even in read mode, we must release the current transaction
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diff changeset
   217
            self.repo._free_pool(self.pool)
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   218
            self.pool.pool_reset(self)
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diff changeset
   219
            self._threaddata.pool = None
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diff changeset
   220
            
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   221
    def system_sql(self, sql, args=None):
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   222
        """return a sql cursor on the system database"""
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diff changeset
   223
        if not sql.split(None, 1)[0].upper() == 'SELECT':
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diff changeset
   224
            self.mode = 'write'
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diff changeset
   225
        cursor = self.pool['system']
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diff changeset
   226
        self.pool.source('system').doexec(cursor, sql, args)
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diff changeset
   227
        return cursor
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diff changeset
   228
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   229
    def actual_session(self):
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   230
        """return the original parent session if any, else self"""
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diff changeset
   231
        return self        
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diff changeset
   232
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   233
    # shared data handling ###################################################
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diff changeset
   234
    
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diff changeset
   235
    def get_shared_data(self, key, default=None, pop=False):
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diff changeset
   236
        """return value associated to `key` in session data"""
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diff changeset
   237
        if pop:
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diff changeset
   238
            return self.data.pop(key, default)
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diff changeset
   239
        else:
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   240
            return self.data.get(key, default)
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parents:
diff changeset
   241
        
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   242
    def set_shared_data(self, key, value, querydata=False):
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   243
        """set value associated to `key` in session data"""
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diff changeset
   244
        if querydata:
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diff changeset
   245
            self.set_query_data(key, value)
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diff changeset
   246
        else:
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diff changeset
   247
            self.data[key] = value
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diff changeset
   248
        
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diff changeset
   249
    # request interface #######################################################
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diff changeset
   250
    
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diff changeset
   251
    def set_entity_cache(self, entity):
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diff changeset
   252
        # no entity cache in the server, too high risk of inconsistency
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   253
        # between pre/post hooks
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diff changeset
   254
        pass
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diff changeset
   255
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   256
    def entity_cache(self, eid):
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diff changeset
   257
        raise KeyError(eid)
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diff changeset
   258
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   259
    def base_url(self):
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diff changeset
   260
        return self.repo.config['base-url'] or u''
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parents:
diff changeset
   261
        
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   262
    def from_controller(self):
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diff changeset
   263
        """return the id (string) of the controller issuing the request (no
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parents:
diff changeset
   264
        sense here, always return 'view')
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parents:
diff changeset
   265
        """
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parents:
diff changeset
   266
        return 'view'
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parents:
diff changeset
   267
    
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   268
    def source_defs(self):
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diff changeset
   269
        return self.repo.source_defs()
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   271
    def describe(self, eid):
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   272
        """return a tuple (type, sourceuri, extid) for the entity with id <eid>"""
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   273
        return self.repo.type_and_source_from_eid(eid, self)
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   274
    
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   275
    # db-api like interface ###################################################
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   276
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   277
    def source_from_eid(self, eid):
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   278
        """return the source where the entity with id <eid> is located"""
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   279
        return self.repo.source_from_eid(eid, self)
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   280
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   281
    def decorate_rset(self, rset, propagate=False):
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   282
        rset.vreg = self.vreg
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   283
        rset.req = propagate and self or self.actual_session()
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   284
        return rset
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   285
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   286
    @property
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   287
    def super_session(self):
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   288
        try:
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   289
            csession = self._threaddata.childsession
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   290
        except AttributeError:
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   291
            if self.is_super_session:
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   292
                csession = self
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   293
            else:
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   294
                csession = ChildSession(self)
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   295
            self._threaddata.childsession = csession
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parents:
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   296
        # need shared pool set
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diff changeset
   297
        self.set_pool()
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diff changeset
   298
        return csession
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   299
        
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   300
    def unsafe_execute(self, rql, kwargs=None, eid_key=None, build_descr=False,
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   301
                       propagate=False):
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diff changeset
   302
        """like .execute but with security checking disabled (this method is
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parents:
diff changeset
   303
        internal to the server, it's not part of the db-api)
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parents:
diff changeset
   304
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diff changeset
   305
        if `propagate` is true, the super_session will be attached to the result
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   306
        set instead of the parent session, hence further query done through
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parents:
diff changeset
   307
        entities fetched from this result set will bypass security as well
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   308
        """
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   309
        return self.super_session.execute(rql, kwargs, eid_key, build_descr,
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   310
                                          propagate)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   311
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parents:
diff changeset
   312
    @property
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parents:
diff changeset
   313
    def cursor(self):
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parents:
diff changeset
   314
        """return a rql cursor"""
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parents:
diff changeset
   315
        return self
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parents:
diff changeset
   316
    
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parents:
diff changeset
   317
    def execute(self, rql, kwargs=None, eid_key=None, build_descr=True,
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parents:
diff changeset
   318
                propagate=False):
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parents:
diff changeset
   319
        """db-api like method directly linked to the querier execute method
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parents:
diff changeset
   320
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parents:
diff changeset
   321
        Becare that unlike actual cursor.execute, `build_descr` default to
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   322
        false
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   323
        """
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   324
        rset = self._execute(self, rql, kwargs, eid_key, build_descr)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   325
        return self.decorate_rset(rset, propagate)
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parents:
diff changeset
   326
    
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   327
    def commit(self, reset_pool=True):
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parents:
diff changeset
   328
        """commit the current session's transaction"""
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   329
        if self.pool is None:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   330
            assert not self.pending_operations
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   331
            self._query_data.clear()
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   332
            self._touch()
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   333
            return
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   334
        if self.commit_state:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   335
            return
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   336
        # on rollback, an operation should have the following state
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   337
        # information:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   338
        # - processed by the precommit/commit event or not
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   339
        # - if processed, is it the failed operation
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   340
        try:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   341
            for trstate in ('precommit', 'commit'):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   342
                processed = []
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   343
                self.commit_state = trstate
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   344
                try:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   345
                    while self.pending_operations:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   346
                        operation = self.pending_operations.pop(0)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   347
                        operation.processed = trstate
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   348
                        processed.append(operation)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   349
                        operation.handle_event('%s_event' % trstate)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   350
                    self.pending_operations[:] = processed
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   351
                    self.debug('%s session %s done', trstate, self.id)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   352
                except:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   353
                    self.exception('error while %sing', trstate)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   354
                    operation.failed = True
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   355
                    for operation in processed:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   356
                        operation.handle_event('revert%s_event' % trstate)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   357
                    self.rollback(reset_pool)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   358
                    raise
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   359
            self.pool.commit()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   360
        finally:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   361
            self._touch()
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   362
            self.commit_state = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   363
            self.pending_operations[:] = []
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   364
            self._query_data.clear()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   365
            if reset_pool:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   366
                self.reset_pool()
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   367
                        
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   368
    def rollback(self, reset_pool=True):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   369
        """rollback the current session's transaction"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   370
        if self.pool is None:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   371
            assert not self.pending_operations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   372
            self._query_data.clear()
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   373
            self._touch()
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   374
            return
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   375
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   376
            while self.pending_operations:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   377
                try:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   378
                    operation = self.pending_operations.pop(0)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   379
                    operation.handle_event('rollback_event')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   380
                except:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   381
                    self.critical('rollback error', exc_info=sys.exc_info())
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   382
                    continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   383
            self.pool.rollback()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   384
        finally:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   385
            self._touch()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   386
            self.pending_operations[:] = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   387
            self._query_data.clear()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   388
            if reset_pool:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   389
                self.reset_pool()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   390
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   391
    def close(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   392
        """do not close pool on session close, since they are shared now"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   393
        self.rollback()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   394
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   395
    # transaction data/operations management ##################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   396
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   397
    def add_query_data(self, key, value):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   398
        self._query_data.setdefault(key, []).append(value)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   399
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   400
    def set_query_data(self, key, value):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   401
        self._query_data[key] = value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   402
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   403
    def query_data(self, key, default=None, setdefault=False, pop=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   404
        if setdefault:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   405
            assert not pop
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   406
            return self._query_data.setdefault(key, default)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   407
        if pop:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   408
            return self._query_data.pop(key, default)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   409
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   410
            return self._query_data.get(key, default)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   411
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   412
    def add_operation(self, operation, index=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   413
        """add an observer"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   414
        assert self.commit_state != 'commit'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   415
        if index is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   416
            self.pending_operations.insert(index, operation)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   417
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   418
            self.pending_operations.append(operation)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   419
            
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   420
    # querier helpers #########################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   421
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   422
    def build_description(self, rqlst, args, result):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   423
        """build a description for a given result"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   424
        if len(rqlst.children) == 1 and len(rqlst.children[0].solutions) == 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   425
            # easy, all lines are identical
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   426
            selected = rqlst.children[0].selection
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   427
            solution = rqlst.children[0].solutions[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   428
            description = _make_description(selected, args, solution)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   429
            return [tuple(description)] * len(result)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   430
        # hard, delegate the work :o)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   431
        return self.manual_build_descr(rqlst, args, result)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   432
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   433
    def manual_build_descr(self, rqlst, args, result):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   434
        """build a description for a given result by analysing each row
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
        XXX could probably be done more efficiently during execution of query
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   437
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   438
        # not so easy, looks for variable which changes from one solution
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   439
        # to another
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   440
        unstables = rqlst.get_variable_variables()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   441
        basedescription = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   442
        todetermine = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   443
        selected = rqlst.children[0].selection # sample selection
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   444
        for i, term in enumerate(selected):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   445
            if isinstance(term, Function) and term.descr().rtype is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   446
                basedescription.append(term.get_type(term.descr().rtype, args))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   447
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   448
            for vref in term.get_nodes(VariableRef):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   449
                if vref.name in unstables:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   450
                    basedescription.append(None)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   451
                    todetermine.append( (i, is_final(rqlst, vref.variable, args)) )
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   452
                    break
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   453
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   454
                # sample etype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   455
                etype = rqlst.children[0].solutions[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   456
                basedescription.append(term.get_type(etype, args))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   457
        if not todetermine:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   458
            return [tuple(basedescription)] * len(result)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   459
        return self._build_descr(result, basedescription, todetermine)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   460
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   461
    def _build_descr(self, result, basedescription, todetermine):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   462
        description = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   463
        etype_from_eid = self.describe
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   464
        for row in result:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   465
            row_descr = basedescription
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   466
            for index, isfinal in todetermine:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   467
                value = row[index]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   468
                if value is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   469
                    # None value inserted by an outer join, no type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   470
                    row_descr[index] = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   471
                    continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   472
                if isfinal:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   473
                    row_descr[index] = etype_from_pyobj(value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   474
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   475
                    row_descr[index] = etype_from_eid(value)[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   476
            description.append(tuple(row_descr))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   477
        return description
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   478
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   479
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   480
class ChildSession(Session):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   481
    """child (or internal) session are used to hijack the security system
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   482
    """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   483
    cnxtype = 'inmemory'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   484
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   485
    def __init__(self, parent_session):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   486
        self.id = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   487
        self.is_internal_session = False
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   488
        self.is_super_session = True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   489
        # session which has created this one
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   490
        self.parent_session = parent_session
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   491
        self.user = InternalManager()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   492
        self.repo = parent_session.repo
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   493
        self.vreg = parent_session.vreg
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   494
        self.data = parent_session.data
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   495
        self.encoding = parent_session.encoding
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   496
        self.lang = parent_session.lang
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   497
        self._ = self.__ = parent_session._
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   498
        # short cut to querier .execute method
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   499
        self._execute = self.repo.querier.execute
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   500
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   501
    @property
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   502
    def super_session(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   503
        return self
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   504
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   505
    def get_mode(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   506
        return self.parent_session.mode
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   507
    def set_mode(self, value):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   508
        self.parent_session.set_mode(value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   509
    mode = property(get_mode, set_mode)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   510
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   511
    def get_commit_state(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   512
        return self.parent_session.commit_state
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   513
    def set_commit_state(self, value):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   514
        self.parent_session.set_commit_state(value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   515
    commit_state = property(get_commit_state, set_commit_state)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   516
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   517
    @property
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   518
    def pool(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   519
        return self.parent_session.pool
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   520
    @property
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   521
    def pending_operations(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   522
        return self.parent_session.pending_operations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   523
    @property
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   524
    def _query_data(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   525
        return self.parent_session._query_data
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   526
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   527
    def set_pool(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   528
        """the session need a pool to execute some queries"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   529
        self.parent_session.set_pool()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   530
            
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   531
    def reset_pool(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   532
        """the session has no longer using its pool, at least for some time
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   533
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   534
        self.parent_session.reset_pool()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   535
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   536
    def actual_session(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   537
        """return the original parent session if any, else self"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   538
        return self.parent_session
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   539
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   540
    def commit(self, reset_pool=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   541
        """commit the current session's transaction"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   542
        self.parent_session.commit(reset_pool)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   543
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   544
    def rollback(self, reset_pool=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   545
        """rollback the current session's transaction"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   546
        self.parent_session.rollback(reset_pool)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   547
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   548
    def close(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   549
        """do not close pool on session close, since they are shared now"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   550
        self.rollback()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   551
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   552
    def user_data(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   553
        """returns a dictionnary with this user's information"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   554
        return self.parent_session.user_data()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   555
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   556
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   557
class InternalSession(Session):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   558
    """special session created internaly by the repository"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   559
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   560
    def __init__(self, repo, cnxprops=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   561
        super(InternalSession, self).__init__(_IMANAGER, repo, cnxprops,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   562
                                              _id='internal')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   563
        self.cnxtype = 'inmemory'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   564
        self.is_internal_session = True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   565
        self.is_super_session = True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   566
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   567
    @property
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   568
    def super_session(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   569
        return self
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   570
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   571
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   572
class InternalManager(object):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   573
    """a manager user with all access rights used internally for task such as
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   574
    bootstrapping the repository or creating regular users according to
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   575
    repository content
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   576
    """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   577
    def __init__(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   578
        self.eid = -1
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   579
        self.login = u'__internal_manager__'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   580
        self.properties = {}
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   581
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   582
    def matching_groups(self, groups):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   583
        return 1
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   584
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   585
    def is_in_group(self, group):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   586
        return True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   587
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   588
    def owns(self, eid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   589
        return True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   590
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   591
    def has_permission(self, pname, contexteid=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   592
        return True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   593
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   594
    def property_value(self, key):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   595
        if key == 'ui.language':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   596
            return 'en'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   597
        return None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   598
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   599
_IMANAGER= InternalManager()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   600
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   601
from logging import getLogger
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   602
from cubicweb import set_log_methods
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   603
set_log_methods(Session, getLogger('cubicweb.session'))