[CalendarServer-changes] [847] CalendarServer/trunk/twistedcaldav/directory/resource.py

[source_changes at macosforge.org]

Revision: 847
          http://trac.macosforge.org/projects/calendarserver/changeset/847
Author:   wsanchez at apple.com
Date:     2006-12-15 20:22:41 -0800 (Fri, 15 Dec 2006)

Log Message:
-----------
locateChild() now calls provisionChild() if appropriate.

Modified Paths:
--------------
    CalendarServer/trunk/twistedcaldav/directory/resource.py

Modified: CalendarServer/trunk/twistedcaldav/directory/resource.py
===================================================================
--- CalendarServer/trunk/twistedcaldav/directory/resource.py	2006-12-16 04:21:40 UTC (rev 846)
+++ CalendarServer/trunk/twistedcaldav/directory/resource.py	2006-12-16 04:22:41 UTC (rev 847)
@@ -22,6 +22,8 @@
 
 __all__ = ["AutoProvisioningResourceMixIn"]
 
+from twisted.internet.defer import succeed, maybeDeferred
+
 class AutoProvisioningResourceMixIn (object):
     """
     Adds auto-provisioning to a Resource implementation.
@@ -41,15 +43,19 @@
         """
         return None
 
-    def locateChild(self, *args):
+    def provisionChild(self, name):
+        pass
+
+    def locateChild(self, request, segments):
         """
         This implementation calls L{provision}, then super's L{locateChild}, thereby
         ensuring that looked-up resources are provisioned.
         """
-        super_method = super(AutoProvisioningResourceMixIn, self).locateChild
-        d = self.provision()
-        if d is None:
-            return super_method(*args)
+        name = segments[0]
+        if name == "":
+            d = succeed(None)
         else:
-            d.addCallback(lambda _: super_method(*args))
-            return d
+            d = maybeDeferred(self.provisionChild, name)
+        d.addCallback(lambda _: self.provision())
+        d.addCallback(lambda _: super(AutoProvisioningResourceMixIn, self).locateChild(request, segments))
+        return d

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