Changeset 15769

Timestamp:

7 Nov 2019, 13:20:25 (5 years ago)

Author:

uli

Message:

Unregister broken event handler on startup.

The indexAdded handler of zope.catalog tries to index all objects in a ZODB
when a new catalog index is added. This means trouble with large catalogs and
we disable this handler on startup. Other ways to unregistering it are more
difficult.

File:

• main/waeup.kofa/trunk/src/waeup/kofa/meta.py (modified) (3 diffs)

main/waeup.kofa/trunk/src/waeup/kofa/meta.py

@@ -35 +35 @@
 """
 import grok
+import grokcore.component
 import martian
 from grok import components
@@ -40 +41 @@
 from martian.error import GrokError
 from zope import component
+from zope.processlifetime import IDatabaseOpened
 from waeup.kofa.interfaces import IObjectUpgradeEvent
 
@@ -106 +108 @@
                 pass
         #site.logger.info('Catalog `%s` ready.' % self.catalog_name)
+
+
+
+@grokcore.component.subscribe(IDatabaseOpened)
+def disable_broken_handlers(event):
+    """This one is fired after ZODB setup.
+
+    Unregsiter handlers etc., that are broken or meant trouble in the past.
+    """
+    from zope.component import getGlobalSiteManager
+    from zope.catalog.catalog import indexAdded
+    worked = getGlobalSiteManager().unregisterHandler(indexAdded)
+    if worked:
+        print("Unregistered handler zope.catalog.catalog.indexAdded")
+    # TODO: register a replacement that copes better with large indexes.