[jboss-dev-forums] [Design of EJB 3.0] - Re: Injecting into the Containers

[ALRubinger]

"ALRubinger" wrote : * New Deployer to Create a Metrics POJO, then attach it to the DeploymentUnit
  | * Ejb3Deployer picks up the attachment and sets it upon the Ejb3JBoss5Deployment.
  | * Containers get at the Metrics POJO via getDeployment().

Alternatively I can:

* Have Ejb3MetricsDeployer come along *after* Ejb3Deployer
* Pick out all Containers created from the Deployment
* Inject Metrics POJOs into each of them

...thus adding metrics becomes a concern atop EJB3.  ejb3-core then relies only upon ejb3-metrics-spi, and ejb3-metrics-impl can be a JAR which includes the Ejb3MetricsDeployer definition in a jboss-beans.xml.

But ejb3-core still needs to make the calls to the underlying metrics collectors, so we still mix concerns unless we start intercepting things like createSession and destroySession via AOP.

S,
ALR

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