Use weakreferences to hold onto pages instead. -igor
On 1/24/09, Frank van Lankvelt <[email protected]> wrote: > I'm trying to get a page to observe a business object that can send > events. The changes don't warrant a full page refresh, so I want to > update only those parts of the page that have changed as a result of the > events. > > I've seen wicketstuff-push, where a similar kind of observation is > present in the Application. From what I could see, the chat example has > the drawback that there is no *unregistering* of listeners when pages > are disposed of, so there is a memory leak. (all pages will be kept in > memory, being referenced directly by the service in the application) > > There doesn't seem to be any support for cleaning up pages, e.g. in the > form of listeners that an application could register with the session > store. An alternative seems to be to implement my own PageMap, but I'm > reluctant to do that as there will be a lot of copy/paste involved and > the existing PageMap implementations rely on the fact that they're in > the same package as Session. A different alternative is to store all > the listeners in a registry and use a separate thread to remove any > listeners that are associated with pages that are no longer stored. Is > there a better way? > > Thanks, Frank > > > [email protected] www.onehippo.com > Amsterdam Hippo B.V. Oosteinde 11 1017 WT Amsterdam > +31(0)20-5224466 > San Francisco Hippo USA Inc. 101 H Street, suite Q Petaluma CA > 94952-5100 +1-877-41-HIPPO > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
