goa/appobjects/dbmgmt.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 16 Sep 2009 16:37:49 +0200
branch3.5
changeset 3252 c0e10da6f1cf
parent 2312 af4d8f75c5db
child 3689 deb13e88e037
permissions -rw-r--r--
tests update
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"""special management views to manage repository content (initialization and
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restoration).
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:organization: Logilab
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:copyright: 2008-2009 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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from os.path import exists, join, abspath
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from pickle import loads, dumps
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from logilab.common.decorators import cached
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from logilab.mtconverter import xml_escape
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from cubicweb.selectors import none_rset, match_user_groups
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from cubicweb.common.view import StartupView
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from cubicweb.web import Redirect
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from cubicweb.goa.dbinit import fix_entities, init_persistent_schema, insert_versions
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from google.appengine.api.datastore import Entity, Key, Get, Put, Delete
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from google.appengine.api.datastore_types import Blob
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from google.appengine.api.datastore_errors import EntityNotFoundError
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def _get_status(name, create=True):
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    key = Key.from_path('EApplicationStatus', name)
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    try:
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        status = Get(key)
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    except EntityNotFoundError:
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        if create:
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            status = Entity('EApplicationStatus', name=name)
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        else:
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            status = None
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    return status
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class AuthInfo(StartupView):
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    """special management view to get cookie values to give to laxctl commands
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    which are doing datastore administration requests
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    """
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    id = 'authinfo'
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    __select__ = none_rset() & match_user_groups('managers')
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    def call(self):
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        cookie = self.req.get_cookie()
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        values = []
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        if self.config['use-google-auth']:
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            for param in ('ACSID', 'dev_appserver_login'):
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                morsel = cookie.get(param)
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                if morsel:
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                    values.append('%s=%s' % (param, morsel.value))
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                    break
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        values.append('__session=%s' % cookie['__session'].value)
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        self.w(u"<p>pass this flag to the client: --cookie='%s'</p>"
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               % xml_escape('; '.join(values)))
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class ContentInit(StartupView):
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    """special management view to initialize content of a repository,
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    step by step to avoid depassing quotas
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    """
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    id = 'contentinit'
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    __select__ = none_rset() & match_user_groups('managers')
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    def server_session(self):
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        ssession = self.config.repo_session(self.req.cnx.sessionid)
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        ssession.set_pool()
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        return ssession
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    def end_core_step(self, msg, status, stepid):
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        status['cpath'] = ''
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        status['stepid'] = stepid
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        Put(status)
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        self.msg(msg)
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    def call(self):
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        status = _get_status('creation')
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        if status.get('finished'):
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            self.redirect('process already completed')
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        config = self.config
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        # execute cubicweb's post<event> script
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        #mhandler.exec_event_script('post%s' % event)
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        # execute cubes'post<event> script if any
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        paths = [p for p in config.cubes_path() + [config.apphome]
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                 if exists(join(p, 'migration'))]
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        paths = [abspath(p) for p in (reversed(paths))]
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        cpath = status.get('cpath')
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        if cpath is None and status.get('stepid') is None:
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            init_persistent_schema(self.server_session(), self.schema)
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            self.end_core_step(u'inserted schema entities', status, 0)
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            return
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        if cpath == '' and status.get('stepid') == 0:
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            fix_entities(self.schema)
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            self.end_core_step(u'fixed bootstrap groups and users', status, 1)
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            return
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        if cpath == '' and status.get('stepid') == 1:
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            insert_versions(self.server_session(), self.config)
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            self.end_core_step(u'inserted software versions', status, None)
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            return
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        for i, path in enumerate(paths):
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            if not cpath or cpath == path:
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                self.info('running %s', path)
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                stepid = status.get('stepid')
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                context = status.get('context')
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                if context is not None:
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                    context = loads(context)
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                else:
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                    context = {}
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                stepid = self._migrhandler.exec_event_script(
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                    'postcreate', path, 'stepable_postcreate', stepid, context)
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                if stepid is None: # finished for this script
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                    # reset script state
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                    context = stepid = None
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                    # next time, go to the next script
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                    self.msg(u'finished postcreate for %s' % path)
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                    try:
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                        path = paths[i+1]
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                        self.continue_link()
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                    except IndexError:
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                        status['finished'] = True
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                        path = None
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                        self.redirect('process completed')
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                else:
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                    if context.get('stepidx'):
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                        self.msg(u'created %s entities for step %s of %s' % (
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                            context['stepidx'], stepid, path))
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                    else:
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                        self.msg(u'finished postcreate step %s for %s' % (
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                            stepid, path))
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                    context = Blob(dumps(context))
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                    self.continue_link()
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                status['context'] = context
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                status['stepid'] = stepid
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                status['cpath'] = path
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                break
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        else:
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            if not cpath:
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                # nothing to be done
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                status['finished'] = True
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                self.redirect('process completed')
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            else:
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                # Note the error: is expected by the laxctl command line tool,
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                # deal with this if internationalization is introduced
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                self.msg(u'error: strange creation state, can\'t find %s'
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                         % cpath)
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                self.w(u'<div>click <a href="%s?vid=contentclear">here</a> to '
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                       '<b>delete all datastore content</b> so process can be '
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                       'reinitialized</div>' % xml_escape(self.req.base_url()))
0
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        Put(status)
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0
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    @property
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    @cached
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    def _migrhandler(self):
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        return self.config.migration_handler(self.schema, interactive=False,
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                                             cnx=self.req.cnx,
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                                             repo=self.config.repository())
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    def msg(self, msg):
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        self.w(u'<div class="message">%s</div>' % xml_escape(msg))
0
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    def redirect(self, msg):
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        raise Redirect(self.req.build_url('', msg))
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    def continue_link(self):
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        self.w(u'<a href="%s">continue</a><br/>' % xml_escape(self.req.url()))
0
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0
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class ContentClear(StartupView):
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    id = 'contentclear'
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    __select__ = none_rset() & match_user_groups('managers')
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    skip_etypes = ('CWGroup', 'CWUser')
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0
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    def call(self):
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        # XXX should use unsafe_execute with all hooks deactivated
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        # XXX step by catching datastore errors?
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        for eschema in self.schema.entities():
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            if eschema.is_final() or eschema in self.skip_etypes:
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                continue
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            self.req.execute('DELETE %s X' % eschema)
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            self.w(u'deleted all %s entities<br/>' % eschema)
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        status = _get_status('creation', create=False)
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        if status:
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            Delete(status)
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        self.w(u'done<br/>')
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        self.w(u'click <a href="%s?vid=contentinit">here</a> to start the data '
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               'initialization process<br/>' % self.req.base_url())