[wildfly-dev] Pooling EJB Session Beans per default

[Ralph Soika]

Hi,

I want to discuss the topic of Session Bean Pooling in WildFly. I know 
that there was a discussion in the past to disable pooling of EJB 
Session Beans per default in WildFly.
I understand when you argue that pooling a session bean is not faster 
than creating the bean from scratch each time a method is called. From 
the perspective of a application server developer this is a clear and 
easy decision. But from the view of an application developer this breaks 
one of the main concepts of session beans - the pooling.
As a application developer I suppose my bean is pooled and I can use one 
of the life-cycle annotations to control my bean. This is a basic 
concept for all kind of beans. First I thought it could be a compromise 
to pool only these beans which have a life-cycle annotation. But this 
isn't a solution.
Knowing that my bean will be pooled allows me - as a component developer 
- to use this as a caching mechanism. For example time intensive 
routines can also cache results in a local variable to be used next time 
a method is called. This isn't a bad practice and can increase 
performance of my component depending on the pool settings.

So my suggestion is to pool also stateless session ejbs in the future. I 
guess form the specification there is no duty to pool beans. So there is 
nothing wrong when not pooling beans. And again I don't want to 
criticize. But at the end not pooling will decrease the performance of 
WildFly. Not the container itself but the applications running in WildFly.
It takes me a long time to figure out why my application was a little 
bit slower in WildFly than in GlassFish until I recognized the missing 
pooling. I can activate pooling and everything is cool. But I guess some 
other application developers will only see that there application is 
slower in WildFly than on other application servers.
And this will effect their decision. That is the argument to activate 
the pool per default.

best regards
Ralph


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