Re: [hibernate-dev] Question about Hibernate 4.0 Infinispan second level cache usage...

On 08/16/2011 10:26 AM, Sanne Grinovero wrote: > Hi Scott, > demanding people to configure a new cache for each application is very > tricky because of ISPN-658, unless you're referring to creating a > whole new instance of Infinispan, with a dedicated new CacheManager > and either starting a new JGroups channel or using the JGroups > multiplexer Paul had written. In case of the multiplexer I'm not sure > if the channel identifiers could be assigned dynamically according to > application deployments and at the same time be consistent with the > identifier numbers chosen on other application server instances, where > different applications might be deployed or in different order, so my > guess is that people would need to deal with additional JGroups > configurations and handle the burden of extra network ports to be > configured and managed. > > Using a rich key containing also the PU and application name seems the > best option to me, and I wouldn't worry too much about the additional > payload as that needs to be transferred anyway: I don't see how the > receiving side could route the command to the proper application > otherwise. > > I think it would be nice - if possible - to not change the > regionfactory contract but in some way wrap the keys normally > produced, to keep it simple and avoid the payload for those cases it's > not deployed in AS7. I could try setting AvailableSettings.CACHE_REGION_PREFIX to the application scoped pu name. That seems to get added to the region name (region would then be: application name + PU jar name + PU name + entity class). Would that be likely to work?

> > Sanne > > > 2011/8/16 Scott Marlow<smarlow(a)redhat.com>: >> I'm looking at o.h.c.i.InfinispanRegionFactory and wondering how best to >> configure the 2lc for AS 7.1. After a recent forum discussion and >> opening AS7-1544, I need to make some corrections to properly >> accommodate multiple JPA persistence units sharing the same underlying >> cache definition or having their own. >> >> Currently, with AS 7.0/7.0.1, I think each application should have its >> own Infinispan cache definition. In theory, the same cache definition >> could be shared if entity class names are unique across all persistence >> units (within apps and across different applications). This can be >> accommodated currently by adding additional Infinispan configuration >> entries to the AS7 standalone.xml (or domain.xml). >> >> One question that I have, is could we add an additional key for >> identifying the 2lc cache. The additional key that I have at the time >> of creating the container managed entity manager, is the "application >> name scoped persistence unit name" (includes the PU name and the >> application/containing jar name). Perhaps that could be passed into >> InfinispanRegionFactory via a property representing a unique way to >> refer to all 2lc entries for a specific applications persistence unit >> definition. I'm not sure how desirable it would be to further qualify >> the cache entries with this additional information (especially if it >> increases the payload transferred during replication). >> >> I think the alternative would be to have each application, configure >> their own cache definition (either to share with all applications PU or >> create a separate definition per PU). This might be close to what I >> already described as a workaround in the >> http://community.jboss.org/message/620903 forum post. >> >> What do you think? >> >> Scott >> _______________________________________________ >> hibernate-dev mailing list >> hibernate-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/hibernate-dev >>