Re: [eclipselink-users] How to clear Cache

["Joe Mc." <m_joe_c@xxxxxxxxxxx>]

Alright, my solution is:

- I am using a SessionCustomizer 
- adding a SessionEventAdapter
- override preExecuteQuery
- call Session.getIdentityMapAccessor().initializeAllIdentityMaps()

Codesnippet:

public void customize(Session session) throws Exception {
  
   SessionEventAdapter evtListener = new SessionEventAdapter() {
      
      @Override
      public void preExecuteQuery(SessionEvent event) {
          Session aSession = event.getSession();
          
          // check if cache invalidation is necessary....
          // if yes:
          aSession.getIdentityMapAccessor().initializeAllIdentityMaps();
      }
   }
}



Open Questions:
- is preExecuteQuery the right place?
- Does any better solution exist?


Thanks

Mc.Joe






Joe Mc. wrote:
> 
> Hi everybody,
> 
> I trying to provide a functionality to delete the whole cache, to support
> the possibility to refresh the objects in the cache.
> How is the best practice to flush the whole cache?
> 
> I have the following use case:
> - 2 separate Applications on different servers
> - Both use JPA Eclipselink
> - Application A reads the objects, I am using SoftWeak
> - Application B modifies sometimes the data
> 
> desired is, that Application B gives Application A a signal (details are
> here irrelevant), if he modified the data
> Application A will flush his cache, if he gets this event.
> 
> Now the question is: Does any API exists to flush the (whole) cache?
> 
> Thanks in advance
> 
> Mc.Joe
> 

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