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Help on caching needed [message #658131]

Sun, 06 March 2011 16:21

Daniel Le Berre
Messages: 82
Registered: July 2009

Member

Dear all,

I have three webapps A, B and C. They all rely on EclipseLink 2.1.2 to persist some entities (C actually just need to read data from the database, it does not modify it).

Each webapp is deployed separately in the servlet container (Tomcat).
(We are not in the context of JEE here, there is no way to deploy an ear with those webapps.)

My problem is the following: if I change the content of the database with one app, then the other apps do not see immediately the changes.

I guess that this is due to the default caching behavior.
http://wiki.eclipse.org/Introduction_to_Cache_%28ELUG%29

What is the best solution to deal with that problem?

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Re: Help on caching needed [message #658150 is a reply to message #658131]

Mon, 07 March 2011 01:50

Tom Eugelink
Messages: 801
Registered: July 2009

Senior Member

I have the same problem with running separate fat clients; you need to disable the 2nd level cache. I will be at work in about an hour and can give you the code if you want.

Tom

On 6-3-2011 22:21, Daniel Le Berre wrote:
> Dear all,
>
> I have three webapps A, B and C. They all rely on EclipseLink 2.1.2 to persist some entities (C actually just need to read data from the database, it does not modify it).
>
> Each webapp is deployed separately in the servlet container (Tomcat).
> (We are not in the context of JEE here, there is no way to deploy an ear with those webapps.)
>
> My problem is the following: if I change the content of the database with one app, then the other apps do not see immediately the changes.
>
> I guess that this is due to the default caching behavior.
> http://wiki.eclipse.org/Introduction_to_Cache_%28ELUG%29
>
> What is the best solution to deal with that problem?
>
>

Report message to a moderator

Re: Help on caching needed [message #658173 is a reply to message #658131]

Mon, 07 March 2011 04:37

Tom Eugelink
Messages: 801
Registered: July 2009

Senior Member

Here it is

lOptions.put(PersistenceUnitProperties.CACHE_SHARED_DEFAULT, "false"); // do not use the shared cache (otherwise refresh will not update from db)

On 6-3-2011 22:21, Daniel Le Berre wrote:
> Dear all,
>
> I have three webapps A, B and C. They all rely on EclipseLink 2.1.2 to persist some entities (C actually just need to read data from the database, it does not modify it).
>
> Each webapp is deployed separately in the servlet container (Tomcat).
> (We are not in the context of JEE here, there is no way to deploy an ear with those webapps.)
>
> My problem is the following: if I change the content of the database with one app, then the other apps do not see immediately the changes.
>
> I guess that this is due to the default caching behavior.
> http://wiki.eclipse.org/Introduction_to_Cache_%28ELUG%29
>
> What is the best solution to deal with that problem?
>
>

Report message to a moderator

Re: Help on caching needed [message #658188 is a reply to message #658173]

Mon, 07 March 2011 05:35

Daniel Le Berre
Messages: 82
Registered: July 2009

Member

Many thanks Tom!

Report message to a moderator

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