bugfix for getting proper values from cache

rhodecode/model/scm.py

@@ -1,384 +1,385 b''
 # -*- coding: utf-8 -*-
 """
     rhodecode.model.scm
     ~~~~~~~~~~~~~~~~~~~
 
     Scm model for RhodeCode
 
     :created_on: Apr 9, 2010
     :author: marcink
     :copyright: (C) 2009-2011 Marcin Kuzminski <[e-mail]>    
     :license: GPLv3, see COPYING for more details.
 """
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
 # as published by the Free Software Foundation; version 2
 # of the License or (at your opinion) any later version of the license.
 # 
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 # 
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 # MA  02110-1301, USA.
 import os
 import time
 import traceback
 import logging
 
 from mercurial import ui
 
 from sqlalchemy.exc import DatabaseError
 
 from beaker.cache import cache_region, region_invalidate
 
 from vcs import get_backend
 from vcs.utils.helpers import get_scm
 from vcs.exceptions import RepositoryError, VCSError
 from vcs.utils.lazy import LazyProperty
 
 from rhodecode import BACKENDS
 from rhodecode.lib import helpers as h
 from rhodecode.lib.auth import HasRepoPermissionAny
 from rhodecode.lib.utils import get_repos as get_filesystem_repos, make_ui, \
     action_logger
 from rhodecode.model import BaseModel
 from rhodecode.model.user import UserModel
 from rhodecode.model.repo import RepoModel
 from rhodecode.model.db import Repository, RhodeCodeUi, CacheInvalidation, \
     UserFollowing, UserLog
 from rhodecode.model.caching_query import FromCache
 
 log = logging.getLogger(__name__)
 
 
 class UserTemp(object):
     def __init__(self, user_id):
         self.user_id = user_id
 
     def __repr__(self):
         return "<%s('id:%s')>" % (self.__class__.__name__, self.user_id)
 
 class RepoTemp(object):
     def __init__(self, repo_id):
         self.repo_id = repo_id
 
     def __repr__(self):
         return "<%s('id:%s')>" % (self.__class__.__name__, self.repo_id)
 
 class ScmModel(BaseModel):
     """Generic Scm Model
     """
 
     @LazyProperty
     def repos_path(self):
         """Get's the repositories root path from database
         """
 
         q = self.sa.query(RhodeCodeUi).filter(RhodeCodeUi.ui_key == '/').one()
 
         return q.ui_value
 
     def repo_scan(self, repos_path=None):
         """Listing of repositories in given path. This path should not be a 
         repository itself. Return a dictionary of repository objects
         
         :param repos_path: path to directory containing repositories
         """
 
         log.info('scanning for repositories in %s', repos_path)
 
         if repos_path is None:
             repos_path = self.repos_path
 
         baseui = make_ui('db')
         repos_list = {}
 
         for name, path in get_filesystem_repos(repos_path, recursive=True):
             try:
                 if repos_list.has_key(name):
                     raise RepositoryError('Duplicate repository name %s '
                                     'found in %s' % (name, path))
                 else:
 
                     klass = get_backend(path[0])
 
                     if path[0] == 'hg' and path[0] in BACKENDS.keys():
                         repos_list[name] = klass(path[1], baseui=baseui)
 
                     if path[0] == 'git' and path[0] in BACKENDS.keys():
                         repos_list[name] = klass(path[1])
             except OSError:
                 continue
 
         return repos_list
 
     def get_repos(self, all_repos=None):
         """Get all repos from db and for each repo create it's backend instance.
         and fill that backed with information from database
         
         :param all_repos: give specific repositories list, good for filtering
         """
 
         if all_repos is None:
             all_repos = self.sa.query(Repository)\
                 .order_by(Repository.repo_name).all()
 
         #get the repositories that should be invalidated
         invalidation_list = [str(x.cache_key) for x in \
                              self.sa.query(CacheInvalidation.cache_key)\
                              .filter(CacheInvalidation.cache_active == False)\
                              .all()]
 
         for r in all_repos:
 
-            repo, dbrepo = self.get(r.repo_name, invalidation_list)
+            r_dbr = self.get(r.repo_name, invalidation_list)
 
-            if repo is not None:
+            if r_dbr is not None:
+                repo, dbrepo = r_dbr
                 last_change = repo.last_change
                 tip = h.get_changeset_safe(repo, 'tip')
 
                 tmp_d = {}
                 tmp_d['name'] = r.repo_name
                 tmp_d['name_sort'] = tmp_d['name'].lower()
                 tmp_d['description'] = dbrepo.description
                 tmp_d['description_sort'] = tmp_d['description']
                 tmp_d['last_change'] = last_change
                 tmp_d['last_change_sort'] = time.mktime(last_change.timetuple())
                 tmp_d['tip'] = tip.raw_id
                 tmp_d['tip_sort'] = tip.revision
                 tmp_d['rev'] = tip.revision
                 tmp_d['contact'] = dbrepo.user.full_contact
                 tmp_d['contact_sort'] = tmp_d['contact']
                 tmp_d['owner_sort'] = tmp_d['contact']
                 tmp_d['repo_archives'] = list(repo._get_archives())
                 tmp_d['last_msg'] = tip.message
                 tmp_d['repo'] = repo
                 tmp_d['dbrepo'] = dbrepo
                 yield tmp_d
 
     def get(self, repo_name, invalidation_list=None, retval='all'):
         """Returns a tuple of Repository,DbRepository,
         Get's repository from given name, creates BackendInstance and
         propagates it's data from database with all additional information
         
         :param repo_name:
         :param invalidation_list: if a invalidation list is given the get
             method should not manually check if this repository needs 
             invalidation and just invalidate the repositories in list
         :param retval: string specifing what to return one of 'repo','dbrepo',
             'all'if repo or dbrepo is given it'll just lazy load chosen type
             and return None as the second
         """
         if not HasRepoPermissionAny('repository.read', 'repository.write',
                             'repository.admin')(repo_name, 'get repo check'):
             return
 
         #======================================================================
         # CACHE FUNCTION
         #======================================================================
         @cache_region('long_term')
         def _get_repo(repo_name):
 
             repo_path = os.path.join(self.repos_path, repo_name)
 
             try:
                 alias = get_scm(repo_path)[0]
                 log.debug('Creating instance of %s repository', alias)
                 backend = get_backend(alias)
             except VCSError:
                 log.error(traceback.format_exc())
                 log.error('Perhaps this repository is in db and not in '
                           'filesystem run rescan repositories with '
                           '"destroy old data " option from admin panel')
                 return
 
             if alias == 'hg':
                 repo = backend(repo_path, create=False, baseui=make_ui('db'))
                 #skip hidden web repository
                 if repo._get_hidden():
                     return
             else:
                 repo = backend(repo_path, create=False)
 
             return repo
 
         pre_invalidate = True
         dbinvalidate = False
 
         if invalidation_list is not None:
             pre_invalidate = repo_name in invalidation_list
 
         if pre_invalidate:
             #this returns object to invalidate
             invalidate = self._should_invalidate(repo_name)
             if invalidate:
                 log.info('invalidating cache for repository %s', repo_name)
                 region_invalidate(_get_repo, None, repo_name)
                 self._mark_invalidated(invalidate)
                 dbinvalidate = True
 
         r, dbr = None, None
         if retval == 'repo' or 'all':
             r = _get_repo(repo_name)
         if retval == 'dbrepo' or 'all':
             dbr = RepoModel(self.sa).get_full(repo_name, cache=True,
                                           invalidate=dbinvalidate)
 
 
         return r, dbr
 
 
 
     def mark_for_invalidation(self, repo_name):
         """Puts cache invalidation task into db for 
         further global cache invalidation
         
         :param repo_name: this repo that should invalidation take place
         """
 
         log.debug('marking %s for invalidation', repo_name)
         cache = self.sa.query(CacheInvalidation)\
             .filter(CacheInvalidation.cache_key == repo_name).scalar()
 
         if cache:
             #mark this cache as inactive
             cache.cache_active = False
         else:
             log.debug('cache key not found in invalidation db -> creating one')
             cache = CacheInvalidation(repo_name)
 
         try:
             self.sa.add(cache)
             self.sa.commit()
         except (DatabaseError,):
             log.error(traceback.format_exc())
             self.sa.rollback()
 
 
     def toggle_following_repo(self, follow_repo_id, user_id):
 
         f = self.sa.query(UserFollowing)\
             .filter(UserFollowing.follows_repo_id == follow_repo_id)\
             .filter(UserFollowing.user_id == user_id).scalar()
 
         if f is not None:
 
             try:
                 self.sa.delete(f)
                 self.sa.commit()
                 action_logger(UserTemp(user_id),
                               'stopped_following_repo',
                               RepoTemp(follow_repo_id))
                 return
             except:
                 log.error(traceback.format_exc())
                 self.sa.rollback()
                 raise
 
 
         try:
             f = UserFollowing()
             f.user_id = user_id
             f.follows_repo_id = follow_repo_id
             self.sa.add(f)
             self.sa.commit()
             action_logger(UserTemp(user_id),
                           'started_following_repo',
                           RepoTemp(follow_repo_id))
         except:
             log.error(traceback.format_exc())
             self.sa.rollback()
             raise
 
     def toggle_following_user(self, follow_user_id , user_id):
         f = self.sa.query(UserFollowing)\
             .filter(UserFollowing.follows_user_id == follow_user_id)\
             .filter(UserFollowing.user_id == user_id).scalar()
 
         if f is not None:
             try:
                 self.sa.delete(f)
                 self.sa.commit()
                 return
             except:
                 log.error(traceback.format_exc())
                 self.sa.rollback()
                 raise
 
         try:
             f = UserFollowing()
             f.user_id = user_id
             f.follows_user_id = follow_user_id
             self.sa.add(f)
             self.sa.commit()
         except:
             log.error(traceback.format_exc())
             self.sa.rollback()
             raise
 
     def is_following_repo(self, repo_name, user_id, cache=False):
         r = self.sa.query(Repository)\
             .filter(Repository.repo_name == repo_name).scalar()
 
         f = self.sa.query(UserFollowing)\
             .filter(UserFollowing.follows_repository == r)\
             .filter(UserFollowing.user_id == user_id).scalar()
 
         return f is not None
 
     def is_following_user(self, username, user_id, cache=False):
         u = UserModel(self.sa).get_by_username(username)
 
         f = self.sa.query(UserFollowing)\
             .filter(UserFollowing.follows_user == u)\
             .filter(UserFollowing.user_id == user_id).scalar()
 
         return f is not None
 
     def get_followers(self, repo_id):
         return self.sa.query(UserFollowing)\
                 .filter(UserFollowing.follows_repo_id == repo_id).count()
 
     def get_forks(self, repo_id):
         return self.sa.query(Repository)\
                 .filter(Repository.fork_id == repo_id).count()
 
 
     def get_unread_journal(self):
         return self.sa.query(UserLog).count()
 
 
     def _should_invalidate(self, repo_name):
         """Looks up database for invalidation signals for this repo_name
         
         :param repo_name:
         """
 
         ret = self.sa.query(CacheInvalidation)\
             .filter(CacheInvalidation.cache_key == repo_name)\
             .filter(CacheInvalidation.cache_active == False)\
             .scalar()
 
         return ret
 
     def _mark_invalidated(self, cache_key):
         """ Marks all occurrences of cache to invalidation as already 
         invalidated
         
         :param cache_key:
         """
 
         if cache_key:
             log.debug('marking %s as already invalidated', cache_key)
         try:
             cache_key.cache_active = True
             self.sa.add(cache_key)
             self.sa.commit()
         except (DatabaseError,):
             log.error(traceback.format_exc())
             self.sa.rollback()