[jboss-dev-forums] [Design the new POJO MicroContainer] - Re: Need cleanup of the attachments api

[adrian@jboss.org]

In most cases, the Component just overrides one piece of metadata
(and usually it is not an override)
e.g. the MC components "overrides" the BeanMetaData.

I think it would be pretty annoying if the deployer needs to always code

  | Blah result = unit.getAttachment(Blah.class);
  | if (result == null && unit.isComponent())
  |    result = unit.getParent().getAtttachment(Blah.class);
  | 

IIRC. The case where Bill came across it originally was because he got an invocation
of his deployer for every component when he just wanted to do it once
per deployment (it was after the component deployers).

I told him to add a check:


  | if (unit.isComponent())
  |    return;
  | 

We might want to add better support for deployers that aren't interested in components?

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