Hi,

I have 2 servlets which use hibernate to preserve data.
One is a Reader, the other is a Writer to the same database.

My question is how does the Reader knows that data in the database has been updated by the Writer and Reader needs to refresh its object built using hibernate?

Assume the Writer save the object like this:
HibernateUtil.getSession().saveOrUpdate(user);

And how does the Reader knows it needs to :
user = (User) session.load(User.class, userId);

Writer and Reader can run in different JVM.

Thank you.


Hibernate version: N/A

Mapping documents: N/A

Code between sessionFactory.openSession() and session.close(): N/A

Full stack trace of any exception that occurs: N/A

Name and version of the database you are using: N/A

The generated SQL (show_sql=true): N/A

Debug level Hibernate log excerpt: N/A

Your into an interesting world (which means difficult and dangerous). Client distributed based caching is hard. A distributed cache will help you. Otherwise you have to implement your own update notifications that get distributed to the other JVMs to set the help data as stale (or dirty) which will then force an load the next time the object is required.

Hi,

Can someone recommend a open source solution for distributed cache? Which handle the case that I mention earlier?

Thank you.
Sam