Re: session cleanup hooks
Re: session cleanup hooks
- Subject: Re: session cleanup hooks
- From: Geoff Hopson <email@hidden>
- Date: Sun, 1 Aug 2004 16:32:03 +0100
I do something like this in Session.java
public void terminate() {
NSNotificationCenter nc = NSNotificationCenter.defaultCenter();
nc.postNotification("MySessionWillTerminate", this);
super.terminate();
}
Then I have something listening for the notification, like a controller
object or something
In Constructor...
...
NSNotificationCenter nc = NSNotificationCenter.defaultCenter();
nc.addObserver(this, new NSSelector("doTerminate", new Class[] {
NSNotification.class }), "OOSessionWillTerminate", session());
....
Terminate method that is called....
public void doTerminate(NSNotification notification) {
try {
OOCoordinator object = (OOCoordinator)notification.object();
if (object != null && object == session()) {
// do stuff...
}
}
catch (Exception e) {
// log it. raise, whatever...
}
}
You might have to experiment setting different objects as part of the
notification call (I used 'session' above).
Very underused pattern, that Observer one...
HTH,
Geoff
On 1 Aug 2004, at 14:38, Michael Engelhart wrote:
Are there any hooks that can be called when a session is getting
terminated by the application. I have legacy network connections that
I open and store in a users session to avoid connection overhead with
every request and would like to neatly close them down rather then
just wait for the legacy system to shut them down when they time out.
From what I can tell it also doesn't appear that WOApplication (or
Wonder's ERXApplication which I'm using) does session cleanup by
calling terminate() on the session objects at least from Monitor. I
saw a thread somewhere saying that Monitor uses an undocumented
application shutdown method which doesn't call
WOApplication.terminate() or ERXApplication.terminate(). For a
framework that is so mature I'm really surprised at how little there
is in the way of shutdown hooks there are built into WebObjects.
Does anyone know of any way to write in these hooks?
Thanks
KMike
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