2 May
2009
2 May
'09
3:03 a.m.
Tharindu Madushanka wrote:
1. Create a LoginListener class that implements
EventListener
can I use the package org.xwiki.observation.event to add this class ?
I don't think you need to create this class yet. Better leave it for
when you will start working on the chat module. All you need to do for
this task is to send the events, not receive them.
When you will need to write the listener, it won't be in the
org.xwiki.observation.event package, but in your own package (something
like org.xwiki.chat.events.UserLoginListener).
2. I do not need to create any
DefaultObservationManager instance.
components.xml file is defined with DefaultObservationManager
implementation.
I get reference to it by calling (Step 5) when ever nececary
ObservationManager om = (ObservationManager)
Utils.getComponent(ObservationManager.class);
Step 2 depends on step 1, ignore it for the moment. But as Asiri said,
you will probably get this as an automatic dependency injection, and not
using the component manager.
3. Define class UserLoginEvent similar to
DocumentSaveEvent
in package org.xwiki.observation.event
*[TODO]*
Yes.
4. Need to find the place where I call the
addListener() of
ObservationManager with parameters - object of UserLoginEvent and
reference to login listener. I think when user initiated login I need to
add the listener. I looked at LoginAction class, but could not figure
out a way.
This also depends on step 1. Ignore it for the moment.
If you will write your listener as a component, there is a special
interface that components can implement, Initializable, which adds an
initialize() method which will be called when the component is created
and all its dependencies are in place.
6. Need to find when to call notify() of
DefaultObjectManager instance
when user successfully logged in
A first idea is xwiki-core/com.xpn.xwiki.web.LoginSubmitAction. This
will be refined later, since users that have cookies use a different
mechanism. But LoginSubmitAction is a pretty good initial approximation.
7. Implement notify() in LoginListener
Ignore.
I think I need to get familiar with com.xpn.xwiki.web
package to learn
how to do steps 4 and 6. If anyone could point me some points to look
for it would be really helpful.
Only steps 3 and 6 should be implemented now.
--
Sergiu Dumitriu
http://purl.org/net/sergiu/