topic Repository Session pools in Alfresco Archive

Repository Session pools

alexeyg — Tue, 04 Apr 2006 15:54:55 GMT

I am having a problem creating a JCR session pool. Any suggestions are appreciated.I set SimpleCreds and Repository for my Pool, then do lazy init for Repository Sessions. (using tomcat)The problem comes up in this scenario:1) Request A comes in, A is handled by thread P. Session Z is created (Z i

Re: Repository Session pools

davidc — Tue, 04 Apr 2006 20:57:37 GMT

JCR session login is not heavy. The Alfresco JCR facade is very thin and relies upon level 1 and level 2 caching of the underlying Alfresco repository services - hardly anything is cached against the JCR session itself.

Therefore, you might want to consider retrieving a new session for each thread. This will give each thread its own transaction and is thread safe. If you want to throttle usage, throttle the number of concurrent threads.

Re: Repository Session pools

alexeyg — Wed, 05 Apr 2006 16:55:37 GMT

Thanks for your reply!

Would you actually recommend starting a new session for each thread, or is it more of a convenience thing?

We have multiple independent repository requests generated from each HTTP request - session pool came about because I was paranoid multiple log-ins per single request.

Since posting I got it working by having the session pool start a new session from another thread. It seems to work really well… i will keep it that way unless you see possible problems with that setup…

I am still getting "A valid SecureContext was not provided in the RequestContext" exceptions on session.getRootNode() from time to time… but refreshing the session by loggin in again takes care of that…