--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/hooks/__init__.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,84 @@
+# copyright 2003-2014 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/>.
+"""core hooks registering some maintainance tasks as server startup time"""
+
+__docformat__ = "restructuredtext en"
+
+from datetime import timedelta, datetime
+
+from cubicweb.server import hook
+
+class TransactionsCleanupStartupHook(hook.Hook):
+    """start task to cleanup transaction data"""
+    __regid__ = 'cw.looping-tasks.transactions-cleanup'
+    events = ('server_startup',)
+
+    def __call__(self):
+        # XXX use named args and inner functions to avoid referencing globals
+        # which may cause reloading pb
+        lifetime = timedelta(days=self.repo.config['keep-transaction-lifetime'])
+        def cleanup_old_transactions(repo=self.repo, lifetime=lifetime):
+            mindate = datetime.utcnow() - lifetime
+            with repo.internal_cnx() as cnx:
+                cnx.system_sql(
+                    'DELETE FROM transactions WHERE tx_time < %(time)s',
+                    {'time': mindate})
+                cnx.commit()
+        if self.repo.config['undo-enabled']:
+            self.repo.looping_task(60*60*24, cleanup_old_transactions,
+                                   self.repo)
+
+class UpdateFeedsStartupHook(hook.Hook):
+    """start task to update datafeed based sources"""
+    __regid__ = 'cw.looping-tasks.update-feeds'
+    events = ('server_startup',)
+
+    def __call__(self):
+        def update_feeds(repo):
+            # take a list to avoid iterating on a dictionary whose size may
+            # change
+            for uri, source in list(repo.sources_by_uri.items()):
+                if (uri == 'system'
+                    or not repo.config.source_enabled(source)
+                    or not source.config['synchronize']):
+                    continue
+                with repo.internal_cnx() as cnx:
+                    try:
+                        source.pull_data(cnx)
+                    except Exception as exc:
+                        cnx.exception('while trying to update feed %s', source)
+        self.repo.looping_task(60, update_feeds, self.repo)
+
+
+class DataImportsCleanupStartupHook(hook.Hook):
+    """start task to cleanup old data imports (ie datafeed import logs)"""
+    __regid__ = 'cw.looping-tasks.dataimports-cleanup'
+    events = ('server_startup',)
+
+    def __call__(self):
+        def expire_dataimports(repo=self.repo):
+            for uri, source in repo.sources_by_uri.items():
+                if (uri == 'system'
+                    or not repo.config.source_enabled(source)):
+                    continue
+                with repo.internal_cnx() as cnx:
+                    mindate = datetime.utcnow() - timedelta(seconds=source.config['logs-lifetime'])
+                    cnx.execute('DELETE CWDataImport X WHERE X start_timestamp < %(time)s',
+                                    {'time': mindate})
+                    cnx.commit()
+        self.repo.looping_task(60*60*24, expire_dataimports, self.repo)