I have a Plone-4.3-based site which provides access to another site as well: Whenever someone logs in to my site, (s)he can click on special hyperlinks and proceed to that other site without the need to enter a password there (some kind of simple SSO, based on a ReST interface).
Now I have the need to logout the user from that other site whenever (s)he logs out from my own site, e.g. by sending a special request which is of course not the topic of this question (perhaps it still needs to be implemented, because session expiration used to be good enough.)
How would I accomplish this, to be precise: Where would I hook in that secondary logout code? Is there some kind of logout hook, or should I modify some logout.[c]py view? I couldn't find no event nor category mentioned in the Event types section here.
There is the Products.PlonePAS.events.UserLoggedOutEvent for such purposes.
As an example, it is explained at the Events Section of the Plone Addon Developer Guide