[jboss-dev-forums] [Design the new POJO MicroContainer] - Re: Multiple ClassFileTransformers/Translators

[jason.greene@jboss.com]

"adrian at jboss.org" wrote : 
  | You should use an agent.
  | 
  | The Transformer is only there for backwards compatibility with AOP from before the agent api was available.
  | 

The problem with agents is that they scan every class, regardless of where it came from, which usually has a performance impact (although, in fairness we can probably optimize this away to an instanceof) . We also do not install one by default, and have different ones depending on the JVM (although JRockit support is going away). Since we control classloading, it seems like adding a transformer to specific domains is a better approach.




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