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Posted to jetspeed-user@portals.apache.org by "Sie, Yang" <ya...@FMR.COM> on 2007/10/05 16:47:08 UTC
Sync OJB from Two WAS Servers Pointing to One DB
Hello:
I am posting this for my colleague. He posted it but didn't show up...
We got an issue when we tested in the environment with 2 jetspeed
applications (same) deployed in separated WAS6.1 connected to one
database.
The issue is the preference updated from one JS2 application was not
visible from the other JS2.
The following is what we thought of the cause of this issue.
*User launches two browsers each targeting to one WAS instance.
.On WAS1, the user changes his preference and updates it, the preference
then gets updated in WAS1 OJB layer and database.
*When the user switches to use the browser which targets the WAS2
environment, the request gets the existing preferences already loaded in
its OJB layer which does not have updated data from database.
we have not found and do not know if Jetspeed provides a mechanism to
sync/refresh the ojb layer across multiple WAS instances.
The questions are
1)Is there any configuration we need change to share the ojb cache
across multiple WAS instance?
2)How/Can we disable ojb cache to resolve the issue? i.e. not using
OJB's capability but make request goes to DB directly.
3)Does Jetspeed support distributed ojb cache, in other word, to
synchronize ojb cache at runtime?
Thank you
Chao
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Re: Sync OJB from Two WAS Servers Pointing to One DB
Posted by Philip Mark Donaghy <pm...@apache.org>.
You should try adding,
<object-cache class="org.apache.ojb.broker.cache.ObjectCacheEmptyImpl">
</object-cache>
To the file prefs_repository.xml
Philip
On 10/5/07, Philip Mark Donaghy <pm...@apache.org> wrote:
> I think this might help you.
> http://db.apache.org/ojb/docu/guides/objectcache.html#Turn+off+caching
>
> Philip
>
> On 10/5/07, Sie, Yang <ya...@fmr.com> wrote:
> > Hello:
> >
> > I am posting this for my colleague. He posted it but didn't show up...
> >
> > We got an issue when we tested in the environment with 2 jetspeed
> > applications (same) deployed in separated WAS6.1 connected to one
> > database.
> >
> > The issue is the preference updated from one JS2 application was not
> > visible from the other JS2.
> >
> > The following is what we thought of the cause of this issue.
> >
> > *User launches two browsers each targeting to one WAS instance.
> > .On WAS1, the user changes his preference and updates it, the preference
> > then gets updated in WAS1 OJB layer and database.
> > *When the user switches to use the browser which targets the WAS2
> > environment, the request gets the existing preferences already loaded in
> > its OJB layer which does not have updated data from database.
> >
> > we have not found and do not know if Jetspeed provides a mechanism to
> > sync/refresh the ojb layer across multiple WAS instances.
> >
> > The questions are
> >
> > 1)Is there any configuration we need change to share the ojb cache
> > across multiple WAS instance?
> > 2)How/Can we disable ojb cache to resolve the issue? i.e. not using
> > OJB's capability but make request goes to DB directly.
> > 3)Does Jetspeed support distributed ojb cache, in other word, to
> > synchronize ojb cache at runtime?
> >
> > Thank you
> >
> > Chao
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: jetspeed-user-unsubscribe@portals.apache.org
> > For additional commands, e-mail: jetspeed-user-help@portals.apache.org
> >
> >
>
>
> --
> Philip Donaghy
> Cushing Technologies
> Portals.Apache.Org Project
> Skype: philipmarkdonaghy
> Office: +1 207 326 8959
> Mobile: +1 914 582 9654
>
--
Philip Donaghy
Cushing Technologies
Portals.Apache.Org Project
Skype: philipmarkdonaghy
Office: +1 207 326 8959
Mobile: +1 914 582 9654
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Re: Sync OJB from Two WAS Servers Pointing to One DB
Posted by Philip Mark Donaghy <pm...@apache.org>.
I think this might help you.
http://db.apache.org/ojb/docu/guides/objectcache.html#Turn+off+caching
Philip
On 10/5/07, Sie, Yang <ya...@fmr.com> wrote:
> Hello:
>
> I am posting this for my colleague. He posted it but didn't show up...
>
> We got an issue when we tested in the environment with 2 jetspeed
> applications (same) deployed in separated WAS6.1 connected to one
> database.
>
> The issue is the preference updated from one JS2 application was not
> visible from the other JS2.
>
> The following is what we thought of the cause of this issue.
>
> *User launches two browsers each targeting to one WAS instance.
> .On WAS1, the user changes his preference and updates it, the preference
> then gets updated in WAS1 OJB layer and database.
> *When the user switches to use the browser which targets the WAS2
> environment, the request gets the existing preferences already loaded in
> its OJB layer which does not have updated data from database.
>
> we have not found and do not know if Jetspeed provides a mechanism to
> sync/refresh the ojb layer across multiple WAS instances.
>
> The questions are
>
> 1)Is there any configuration we need change to share the ojb cache
> across multiple WAS instance?
> 2)How/Can we disable ojb cache to resolve the issue? i.e. not using
> OJB's capability but make request goes to DB directly.
> 3)Does Jetspeed support distributed ojb cache, in other word, to
> synchronize ojb cache at runtime?
>
> Thank you
>
> Chao
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: jetspeed-user-unsubscribe@portals.apache.org
> For additional commands, e-mail: jetspeed-user-help@portals.apache.org
>
>
--
Philip Donaghy
Cushing Technologies
Portals.Apache.Org Project
Skype: philipmarkdonaghy
Office: +1 207 326 8959
Mobile: +1 914 582 9654
---------------------------------------------------------------------
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