Curt,
Thanks for your input.
My requirement is to share the data managed by the Cache Manager component across
multiple sessions.
If possible, I would like to implement with EJB (Statefull?) but not quite sure if
EJB would be a right model to implement
a shared data service. For one, I have to ensure that there is only one instance of
this bean. Otherwise, cached data will
splitter across multiple instances of EJB (which may be running in different
JVM)...and then I have to deal with locating right
instance of bean etc.
You mentioned about data caching in ND5. Where and how is this being done? In JDBC
service?
Is PAC more appropriate model than EJB in ND5 for some thing like this?
Raj
Curt Springer <[EMAIL PROTECTED]> wrote:
>First off, you should look at the data caching feature in ND5 to see if>that might do
>something for you.
>
>Anyhow, I've got some stuff that caches rows, on a session basis.
>Question: are you trying to cache data for use in one session or across
>multiple sessions?
>
>If for one session, I would put the data into a session object. In each
>page get the session object in onBeforeLoad or button/href web events, put
>it back at the end of processing. I keep rows from up to 30 tables in
>memory on this basis.
>
>At one point, I had a singleton class, and it killed performance. I found
>that it worked to have one object of the class owned by each page class,
>since much of ND's object instantiation model is driven at the page level.
>
>You should also look at EJB in ND5. That would be a cleaner implementation
>than anything available in ND4, except maybe a PAC.
>
>-- Curt Springer, Team ND
>
>At 04:08 PM 4/15/99 -0800, [EMAIL PROTECTED] wrote:
>>In our architecture, we have a Cache Manager component which caches the
>data (in memory) to
>>reduce trips to the DB. Cache Manager is a singleton, i.e. there is only
>one instance of Cache Manager.
>>What is the best way to implement the Cache Manager in ND so that the
>cached data
>>is accessible to other services?
>>
>>Thanks...
>>
>>Raj
>>
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