"emuckenhuber" wrote : Yes, setInput() marks the Input as required and 
addInput() is just used for ordering. 
  | 

So this raises the next question - what is setInputs() for? I believe for 
marking multiple inputs as "required". For example ABCDeployer requires InputA 
*and* InputB for it to be considered relevant:

public ABCDeployer()
  | {
  |  setInputs("InputA","InputB");
  |  
  | ...
  | }
  | 
and internally AbstractDeployer.setInputs() does this:

  | public void setInputs(Set<String> inputs)
  |    {
  |       this.inputs = inputs;
  |    }

So going by the code of isRelevant(...) that i posted earlier, this deployer 
will be considered relevant even when none of InputA or InputB are available.


As for the EJB3Deployer i tried as you suggested:

public Ejb3Deployer()
  |    {
  |       setInput(JBossMetaData.class); // additional constraint
  |       addInput(MergedJBossMetaDataDeployer.EJB_MERGED_ATTACHMENT_NAME);
  | 

and it works (i.e. the irrelevant deployments are no longer picked up). But i 
have to do bit more testing to ensure that this deployer is picked at the right 
time/order (i.e. after the MergedJBossMetadataDeployer is run for the 
deployment unit)

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http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4236301#4236301

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