"Hill, Les" wrote:
> Paul,
>
> It is not clear what you are trying to do with your cache.
The application is a document management system with the twist that the
Document object has become very logic-intensive due to customer requirements.
Thus, using data objects became virtually impossible. As a result I created a
Document object cache based on the "cache management pattern" illustrated in
Mark Grand's Java Patterns book. The pattern uses a Singleton Manager, a
Fetcher, and a Cache object.
A quick example of how it is used in our NetD code is:
public int stTitle_onBeforeHtmlOutputEvent(CSpHtmlOutputEvent event)
{
DocumentManager mgr = DocumentManager.getInstance();
Document doc = mgr.fetchDocument(docIDString);
CSpDisplayField f = (CSpDisplayField) event.getSource();
f.setHtmlText(doc.getTitle());
return (PROCEED);
}
> But if cache
> consistency across JVMs is important, then I can think of at least two
> simple options:
>
> Use a global session object -- this would work well for relatively small
> caches.
>
Another poster recommended that I do that and it seems easiest and most
cost-effective for the client. I believe I can make my Cache object into a
CSpValue/Global object relatively quickly, but I have yet to do it.
>
> Use RMI and run a long-lived service that acts as a global cache for all
> CPs. (This can be very easy or very complex depending on what your cache
> needs to do -- RMI itself is almost a no-brainer).
>
That sounds interesting. If anyone has examples of how to do it in NetDynamics,
I'd love to see them.
Thanks for your help,
Paul
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