Added universal cache invalidator for two cached functions.

added invalidation when repository was added or deleted, and another invalidation when there was a mercurial command involved.

pylons_app/controllers/admin.py

@@ -1,101 +1,101 b''
 import logging
 import os
 
 from pylons import request, response, session, tmpl_context as c, url, app_globals as g
 from pylons.controllers.util import abort, redirect
 from pylons_app.lib.base import BaseController, render
 from pylons_app.lib import auth
 from pylons_app.model.forms import LoginForm
 import formencode
 import formencode.htmlfill as htmlfill
 from pylons_app.model import meta
 from pylons_app.model.db import Users, UserLogs
 from webhelpers.paginate import Page
 from pylons_app.lib.utils import check_repo, invalidate_cache
 
 log = logging.getLogger(__name__)
 
 class AdminController(BaseController):
 
     def __before__(self):
         c.admin_user = session.get('admin_user', False)
         c.admin_username = session.get('admin_username')
         
     def index(self):
         # Return a rendered template
         if request.POST:
             #import Login Form validator class
             login_form = LoginForm()
 
             try:
                 c.form_result = login_form.to_python(dict(request.params))
                 if auth.admin_auth(c.form_result['username'], c.form_result['password']):
                     session['admin_user'] = True
                     session['admin_username'] = c.form_result['username']
                     session.save()
                     return redirect(url('admin_home'))
                 else:
                     raise formencode.Invalid('Login Error', None, None,
                                              error_dict={'username':'invalid login',
                                                          'password':'invalid password'})
                                       
             except formencode.Invalid, error:
                 c.form_result = error.value
                 c.form_errors = error.error_dict or {}
                 html = render('admin/admin.html')
 
                 return htmlfill.render(
                     html,
                     defaults=c.form_result,
                     encoding="UTF-8"
                 )
         if c.admin_user:
             sa = meta.Session
                              
             users_log = sa.query(UserLogs)\
                 .order_by(UserLogs.action_date.desc())
             p = int(request.params.get('page', 1))
             c.users_log = Page(users_log, page=p, items_per_page=10)
             c.log_data = render('admin/admin_log.html')
             if request.params.get('partial'):
                 return c.log_data
         return render('admin/admin.html')
 
     def hgrc(self, dirname):
         filename = os.path.join(dirname, '.hg', 'hgrc')
         return filename
 
     def add_repo(self, new_repo):
         
 
         #extra check it can be add since it's the command
         if new_repo == '_admin':
             c.msg = 'DENIED'
             c.new_repo = ''
             return render('admin/add.html')
 
         new_repo = new_repo.replace(" ", "_")
         new_repo = new_repo.replace("-", "_")
 
         try:
             self._create_repo(new_repo)
             c.new_repo = new_repo
             c.msg = 'added repo'
             #clear our cached list for refresh with new repo
-            invalidate_cache('repo_list_2')
+            invalidate_cache('cached_repo_list')
         except Exception as e:
             c.new_repo = 'Exception when adding: %s' % new_repo
             c.msg = str(e)
 
         return render('admin/add.html')
 
 
     def _create_repo(self, repo_name):
         if repo_name in [None, '', 'add']:
             raise Exception('undefined repo_name of repo')
         repo_path = os.path.join(g.base_path, repo_name)
         if check_repo(repo_name, g.base_path):
             log.info('creating repo %s in %s', repo_name, repo_path)
             from vcs.backends.hg import MercurialRepository
             MercurialRepository(repo_path, create=True)        
                 

pylons_app/lib/simplehg.py

@@ -1,59 +1,64 b''
 import os
 from mercurial.hgweb import hgweb
 from mercurial.hgweb.request import wsgiapplication
-from pylons_app.lib.utils import make_ui
+from pylons_app.lib.utils import make_ui, invalidate_cache
 from pylons.controllers.util import abort
 from webob.exc import HTTPNotFound
 class SimpleHg(object):
 
     def __init__(self, application, config):
         self.application = application
         self.config = config
         
     def __call__(self, environ, start_response):
         if not is_mercurial(environ):
             return self.application(environ, start_response)
         else:
             try:
                 repo_name = environ['PATH_INFO'].split('/')[1]
             except:
                 return HTTPNotFound()(environ, start_response)
             
             #since we wrap into hgweb, just reset the path
             environ['PATH_INFO'] = '/'
             self.baseui = make_ui()
-            self.basepath = self.baseui.configitems('paths')[0][1].replace('*', '')
+            self.basepath = self.baseui.configitems('paths')[0][1]\
+                                                            .replace('*', '')
             self.repo_path = os.path.join(self.basepath, repo_name)
             try:
                 app = wsgiapplication(self._make_app)
             except Exception as e:
                 return HTTPNotFound()(environ, start_response)
+            
+            """we know that some change was made to repositories and we should
+            invalidate the cache to see the changes right away"""
+            invalidate_cache('full_changelog', repo_name)
             return app(environ, start_response)            
 
     def _make_app(self):
         hgserve = hgweb(self.repo_path)
         return  self.load_web_settings(hgserve)
         
                 
     def load_web_settings(self, hgserve):
         repoui = make_ui(os.path.join(self.repo_path, '.hg', 'hgrc'), False)
         #set the global ui for hgserve
         hgserve.repo.ui = self.baseui
         
         if repoui:
             #set the repository based config
             hgserve.repo.ui = repoui
             
         return hgserve
                                 
 def is_mercurial(environ):
     """
     Returns True if request's target is mercurial server - header
     ``HTTP_ACCEPT`` of such request would start with ``application/mercurial``.
     """
     http_accept = environ.get('HTTP_ACCEPT')
     if http_accept and http_accept.startswith('application/mercurial'):
         return True
     return False
 
 

pylons_app/lib/utils.py

@@ -1,114 +1,125 b''
 import os
 import logging
 from mercurial import ui, config, hg
 from mercurial.error import RepoError
 log = logging.getLogger(__name__)
 
 
 def get_repo_slug(request):
     path_info = request.environ.get('PATH_INFO')
     uri_lst = path_info.split('/')   
     repo_name = uri_lst[1]
     return repo_name
 
 def is_mercurial(environ):
     """
     Returns True if request's target is mercurial server - header
     ``HTTP_ACCEPT`` of such request would start with ``application/mercurial``.
     """
     http_accept = environ.get('HTTP_ACCEPT')
     if http_accept and http_accept.startswith('application/mercurial'):
         return True
     return False
 
 def check_repo_dir(paths):
     repos_path = paths[0][1].split('/')
     if repos_path[-1] in ['*', '**']:
         repos_path = repos_path[:-1]
     if repos_path[0] != '/':
         repos_path[0] = '/'
     if not os.path.isdir(os.path.join(*repos_path)):
         raise Exception('Not a valid repository in %s' % paths[0][1])
 
 def check_repo(repo_name, base_path):
 
     repo_path = os.path.join(base_path, repo_name)
 
     try:
         r = hg.repository(ui.ui(), repo_path)
         hg.verify(r)
         #here we hnow that repo exists it was verified
         log.info('%s repo is already created', repo_name)
         return False
         #raise Exception('Repo exists')
     except RepoError:
         log.info('%s repo is free for creation', repo_name)
         #it means that there is no valid repo there...
         return True
                 
 def make_ui(path='hgwebdir.config', checkpaths=True):        
     """
     A funcion that will read python rc files and make an ui from read options
     
     @param path: path to mercurial config file
     """
     if not os.path.isfile(path):
         log.error('Unable to read config file %s' % path)
         return False
     #propagated from mercurial documentation
     sections = [
                 'alias',
                 'auth',
                 'decode/encode',
                 'defaults',
                 'diff',
                 'email',
                 'extensions',
                 'format',
                 'merge-patterns',
                 'merge-tools',
                 'hooks',
                 'http_proxy',
                 'smtp',
                 'patch',
                 'paths',
                 'profiling',
                 'server',
                 'trusted',
                 'ui',
                 'web',
                 ]
 
     baseui = ui.ui()
     cfg = config.config()
     cfg.read(path)
     if checkpaths:check_repo_dir(cfg.items('paths'))
 
     for section in sections:
         for k, v in cfg.items(section):
             baseui.setconfig(section, k, v)
     
     return baseui
 
-def invalidate_cache(name):
+def invalidate_cache(name, *args):
     from beaker.cache import region_invalidate
-    if name == 'repo_list_2':
         log.info('INVALIDATING CACHE FOR %s', name)
-        from pylons_app.lib.base import _get_repos
-        #clear our cached list for refresh with new repo
-        region_invalidate(_get_repos, None, 'repo_list_2')
+    
+    """propaget our arguments to make sure invalidation works. First
+    argument has to be the name of cached func name give to cache decorator
+    without that the invalidation would not work"""
+    tmp = [name]
+    tmp.extend(args)
+    args = tuple(tmp)
+    
+    if name == 'cached_repo_list':
+        from pylons_app.lib.base import _get_repos_cached
+        region_invalidate(_get_repos_cached, None, *args)
+        
+    if name == 'full_changelog':
+        from pylons_app.controllers.changelog import _full_changelog_cached
+        region_invalidate(_full_changelog_cached, None, *args)
 
 from vcs.backends.base import BaseChangeset
 from vcs.utils.lazy import LazyProperty
 class EmptyChangeset(BaseChangeset):
     
     revision = -1
 
     @LazyProperty
     def raw_id(self):
         """
         Returns raw string identifing this changeset, useful for web
         representation.
         """
         return '0' * 12