--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sobjects/services.py	Mon Jun 24 12:05:35 2013 +0200
@@ -0,0 +1,57 @@
+# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of CubicWeb.
+#
+# CubicWeb is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# CubicWeb 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 Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+"""Define server side service provided by cubicweb"""
+
+import threading
+
+from cubicweb.server import Service
+from cubicweb.predicates import match_user_groups
+
+class StatsService(Service):
+    """Return a dictionary containing some statistics about the repository
+    resources usage.
+    """
+
+    __regid__  = 'repo_stats'
+    __select__ = match_user_groups('managers')
+
+    def call(self):
+        repo = self._cw.repo # Service are repo side only.
+        results = {}
+        querier = repo.querier
+        source = repo.system_source
+        for size, maxsize, hits, misses, title in (
+            (len(querier._rql_cache), repo.config['rql-cache-size'],
+            querier.cache_hit, querier.cache_miss, 'rqlt_st'),
+            (len(source._cache), repo.config['rql-cache-size'],
+            source.cache_hit, source.cache_miss, 'sql'),
+            ):
+            results['%s_cache_size' % title] = '%s / %s' % (size, maxsize)
+            results['%s_cache_hit' % title] = hits
+            results['%s_cache_miss' % title] = misses
+            results['%s_cache_hit_percent' % title] = (hits * 100) / (hits + misses)
+        results['type_source_cache_size'] = len(repo._type_source_cache)
+        results['extid_cache_size'] = len(repo._extid_cache)
+        results['sql_no_cache'] = repo.system_source.no_cache
+        results['nb_open_sessions'] = len(repo._sessions)
+        results['nb_active_threads'] = threading.activeCount()
+        looping_tasks = repo._tasks_manager._looping_tasks
+        results['looping_tasks'] = ', '.join(str(t) for t in looping_tasks)
+        results['available_cnxsets'] = repo._cnxsets_pool.qsize()
+        results['threads'] = ', '.join(sorted(str(t) for t in threading.enumerate()))
+        return results