Re: T5.3 application level singleton cache with Hibernate injection
Thanks Kalle, that was the example I wanted to see. Is there a way to force my tapestry-hibernate module to load before my CacheModule , so I can grab it's configuration? Right now I'm spinning up a separate hibernate configuration, and then manually loading classes into that configuration. On Thu, Aug 9, 2012 at 1:05 AM, Kalle Korhonen kalle.o.korho...@gmail.comwrote: On Wed, Aug 8, 2012 at 9:46 PM, Daniel Jue teamp...@gmail.com wrote: Problem: I want to initialize this cache on server startup, before any pages are served, since it can take a few minutes. I want to pass it session from tapestry hibernate, since I use that configuration in the pages (I'm guessing there is some way to get an instance of HibernateSessionSource) I'm sure I could brute force a way to load it's own HibernateSessionManager and then read stuff into memory, but I wanted to see if I could @injectservice somehow. The objects being stored in memory are not necessarily hibernate objects, but we want to use hibernate to construct the caches. Once the in memory cache is created, the session it used to communicate with the DB is no longer needed. Looking around online, it seems that what I want is closest to a service and something like a DAO+Cache. Again, the DAO part is understandable, but is there a proper way to get a Hibernate session injected into it at startup so it can be built, without having to access any web resource to kick it off? Yes, create your service (or create a helper service) to start with @EagerLoad. Lots of things use this but for an example, you could take a look at SeedEntityImpl, an implementation class in Tynamo's seedentity module (http://tynamo.org/tapestry-hibernate-seedentity+guide). Kalle - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: T5.3 application level singleton cache with Hibernate injection
On Thu, Aug 9, 2012 at 10:17 AM, Daniel Jue teamp...@gmail.com wrote: Thanks Kalle, that was the example I wanted to see. Is there a way to force my tapestry-hibernate module to load before my CacheModule , so I can grab it's configuration? Right now I'm spinning up a separate hibernate configuration, and then manually loading classes into that configuration. Just inject whatever services you need, Tapestry will take care of the rest. It's not a question of loading modules but in which order the services are realized. Kalle On Thu, Aug 9, 2012 at 1:05 AM, Kalle Korhonen kalle.o.korho...@gmail.comwrote: On Wed, Aug 8, 2012 at 9:46 PM, Daniel Jue teamp...@gmail.com wrote: Problem: I want to initialize this cache on server startup, before any pages are served, since it can take a few minutes. I want to pass it session from tapestry hibernate, since I use that configuration in the pages (I'm guessing there is some way to get an instance of HibernateSessionSource) I'm sure I could brute force a way to load it's own HibernateSessionManager and then read stuff into memory, but I wanted to see if I could @injectservice somehow. The objects being stored in memory are not necessarily hibernate objects, but we want to use hibernate to construct the caches. Once the in memory cache is created, the session it used to communicate with the DB is no longer needed. Looking around online, it seems that what I want is closest to a service and something like a DAO+Cache. Again, the DAO part is understandable, but is there a proper way to get a Hibernate session injected into it at startup so it can be built, without having to access any web resource to kick it off? Yes, create your service (or create a helper service) to start with @EagerLoad. Lots of things use this but for an example, you could take a look at SeedEntityImpl, an implementation class in Tynamo's seedentity module (http://tynamo.org/tapestry-hibernate-seedentity+guide). Kalle - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
T5.3 application level singleton cache with Hibernate injection
After a long hiatus from web development, I have a chance to get back into Tapestry for a small project. I kind of need a refresher for an approach I haven't had to do before: Context note: Running T5.3 on Tomcat or Jetty, from latest Tynamo release with Tynamo hibernate/resteasy modules. Application: I'm adapting/restructuring an existing application where I have an in memory, RO cache of several GB in a singleton object. Requests hit this cache for some things, and my plan is to have my tapestry pages and rest services bounce against that. A call to the custom cache from a page/rest service will take a session in case it needs to forward the request to databases, etc. Access from rest services/pages are not a problem because I can just inject a session and pass it to the cache. It's a requirement that this cache be in memory. Problem: I want to initialize this cache on server startup, before any pages are served, since it can take a few minutes. I want to pass it session from tapestry hibernate, since I use that configuration in the pages (I'm guessing there is some way to get an instance of HibernateSessionSource) I'm sure I could brute force a way to load it's own HibernateSessionManager and then read stuff into memory, but I wanted to see if I could @injectservice somehow. The objects being stored in memory are not necessarily hibernate objects, but we want to use hibernate to construct the caches. Once the in memory cache is created, the session it used to communicate with the DB is no longer needed. Looking around online, it seems that what I want is closest to a service and something like a DAO+Cache. Again, the DAO part is understandable, but is there a proper way to get a Hibernate session injected into it at startup so it can be built, without having to access any web resource to kick it off? Thanks
Re: T5.3 application level singleton cache with Hibernate injection
On Wed, Aug 8, 2012 at 9:46 PM, Daniel Jue teamp...@gmail.com wrote: Problem: I want to initialize this cache on server startup, before any pages are served, since it can take a few minutes. I want to pass it session from tapestry hibernate, since I use that configuration in the pages (I'm guessing there is some way to get an instance of HibernateSessionSource) I'm sure I could brute force a way to load it's own HibernateSessionManager and then read stuff into memory, but I wanted to see if I could @injectservice somehow. The objects being stored in memory are not necessarily hibernate objects, but we want to use hibernate to construct the caches. Once the in memory cache is created, the session it used to communicate with the DB is no longer needed. Looking around online, it seems that what I want is closest to a service and something like a DAO+Cache. Again, the DAO part is understandable, but is there a proper way to get a Hibernate session injected into it at startup so it can be built, without having to access any web resource to kick it off? Yes, create your service (or create a helper service) to start with @EagerLoad. Lots of things use this but for an example, you could take a look at SeedEntityImpl, an implementation class in Tynamo's seedentity module (http://tynamo.org/tapestry-hibernate-seedentity+guide). Kalle - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
