Best practices for deploying common object services

Hi,
Our team has broken out from our main application around 10 services that largely are used to return objects from 10 common tables in the database. We are thinking that these services should be reusable amongst the 5 or so applications that we are going to have in the near future. We're now trying to decide what the best way to make these common services available to the applications is and after considering several ideas, these are the options we've come up with:
1. Putting jars for all of the services in each application and adding entries to the sessions.xml for any Toplink project mappings that are in the jar files. Also are considering having just one many services jar.
2. Exposing the services through web services and only giving the client apps the client side code to invoke the web service. Realize this may mean a performance hit, but would mean less code on the client.
3. Stateless session EJB's.
4. parent-application tag or some other way to make these jar's be available to all applications on the app server through classloading
5. Some sort of messaging service
Would appreciate some input on this, as this seems like it would be a fairly common problem.
Thanks,
Mark

DBA2008 wrote:
Is this good idea to put RPM recovery catalog & OID schema in OEM Repository DB? I am thinking just to consolidate all these schema's in one db.Unless you are really starved for resources, I would not recommend storing the OID and OEM repositories in the same database. Both of these repositories support different products, and you risk creating unnecessary dependencies when patching or upgrading. As a completely fictitious example, what if your OID installation has a critical issue that requires a repository database upgrade to version 10.2.0.6, and the Grid Control repository database is only certified for version 10.2.0.5?
Regards,
John P.
http://only4left.jpiwowar.com

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Is this good idea to put RPM recovery catalog & OID schema in OEM Repository DB? I am thinking just to consolidate all these schema's in one db.Unless you are really starved for resources, I would not recommend storing the OID and OEM repositories in the same database. Both of these repositories support different products, and you risk creating unnecessary dependencies when patching or upgrading. As a completely fictitious example, what if your OID installation has a critical issue that requires a repository database upgrade to version 10.2.0.6, and the Grid Control repository database is only certified for version 10.2.0.5?
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          Tim wrote:
          > I have the following.
          >
          > 2 Physical machines each running 2 jvm's, thus I have 4 jvm's in my cluster.
          >
          > We access the jvm's via an IIS plug-in.
          >
          > When it comes time to do a new .war file migration, do you need to stop the jvm's
          > first ?
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          Kumar
          >
          >
          > I have tried deploying with the jvm's live, it technically worked but we then
          > noticed several 404 errors during the day on a servlet that was there. (Called
          > successfully around the 404)
          >
          > Anyway, I'm just looking for recomendations on how others deploy to production.
          >
          > Tim

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