Re: [sca-assembly] [Issue 253]: (1.2) Must a global domain channelbe deployed before it can be used?

Hi Mike,

    

    I tend to agree that these are separate concerns, and I agree that
    it doesn't necessarily change the sequence-of-deploying problem. I
    only mentioned the point because I thought you might consider the
    workflow around how definitions.xml gets used as different from the
    workflow around that of deploying composites.

    

    In my view, it probably changes the magnitude of the problem, but
    not the existence.

    

    -Eric.

    

    On 2/23/11 3:48 AM, Mike Edwards wrote:
    
      

      Eric,
      

      

      I think that the issue contained
        in
        ASSEMBLY-257 is pretty well orthogonal to the discussion of
        ASSEMBLY-253.
      

      

      Whether the channel definition is
        in
        a composite file or is contained within a definitions.xml file
        does not
        change the
      

      potential for the channel to be
        in a
        separate contribution from some or all of its "using" producers
        and consumers.
      

      It is this which leads to the
        sequence
        question and the problem with auto-deploy.
      

      

      
      

      Yours, Mike
      

      
        
          

            
              
            
          

          

            
              

            
          

          

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            From:
            
            Eric Johnson
                <>
            
          

          

            To:
            
            Danny van der Rijn
                <>
            
          

          

            Cc:
            
            Mike
                Edwards/UK/IBM@IBMGB, 
            
          

          

            Date:
            
            23/02/2011 05:47
            
          

          

            Subject:
            
            Re: [sca-assembly]
                [Issue 253]: (1.2)
                Must a global domain channel be deployed before it can
                be used?
          

        
      
      

      
      

      

      

      Hi Mike,

        

        On 2/18/11 11:06 AM, Danny van der Rijn wrote: 
      

      <vdR2>

        I agree that mechanically there is little difference between an
        unsatisfied
        reference and an unsatisfied GDC.  Semantically, however, there
        is
        quite a difference.  In order to mechanically satisfy the
        unsatisfied
        GDC (albeit minimally) all that is required is a name, and the
        name is
        known exactly by the unsatisfied use of the GDC.  Therefore the
        runtime
        already has enough information to head off the error.  Not so in
        the
        case of an unsatisfied reference.

        </vdR2>
      

      

          <mje> 

          Thank you for putting it so clearly.
        

      

          My concerns with auto-creation surround this possibility of
          deployment
          taking place as a series of steps, rather than as a "single
          big bang"
          - and with the question of what happens at the completion of
          each step.
        

      

          I am concerned with the case where the Domain level channel is
          there *somewhere*
          in the deployed contributions but where it has not yet been
          deployed.  Allowing
          auto-creation in these circumstances is problematic, if
          auto-creation occurs
          before the deployment of the Domain level channel.
        

      

          </mje> 
      

      At least for this point, this is one of the reasons
        that
        I filed

      

        http://osoa.org/jira/browse/ASSEMBLY-257

        

        If this matters to you, perhaps we should address the question
        of how they're
        deployed before worrying about whether they can be
        auto-deployed?

        

        -Eric.
      

      

      

      
      

      

      
      

        

        
      
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