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From j...@apache.org
Subject [jira] Updated: (RUNTIME-8) Model Driven Runtime
Date Fri, 07 May 2004 01:52:04 GMT
The following issue has been updated:

    Updater: Stephen McConnell (mailto:mcconnell@apache.org)
       Date: Thu, 6 May 2004 6:51 PM
             Component changed to Composition
For a full history of the issue, see:


View the issue:

Here is an overview of the issue:
        Key: RUNTIME-8
    Summary: Model Driven Runtime
       Type: Improvement

     Status: Resolved
   Priority: Major
 Resolution: FIXED

    Project: Merlin Runtime Platform
   Fix Fors:

   Assignee: Stephen McConnell
   Reporter: Stephen McConnell

    Created: Fri, 6 Feb 2004 3:54 PM
    Updated: Thu, 6 May 2004 6:51 PM

The current implementation (3.3 HEAD) of the composition framework relies on a runtime that
is established independently of the composition model.  If is preferable that we move control
over runtime commissioning and decommissioning to the model, which in turn enables model-driven
redeployment and alternative runtime implementations.

Outstanding issues in archiving this objective relate to the establishment by the model of
a default runtime.  This requires some sort of a runtime factory declared at a system level
(e.g. via SystemContext), and the possibility to override a factory at a container or component
model level (i.e. under ContainmentContext or ComponentContext).

A second aspect is the relationship between the model and the runtime - in particular, an
model-driven event pattern is required in which the runtime responds to model based deployment
status - enabling the triggering of event driven redeployment of runtime artifacts.

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