[jira] Created: (HIVEMIND-109) Overriding of services

["Stefan Liebig (JIRA)" <hi...@jakarta.apache.org>]

Overriding of services
----------------------

         Key: HIVEMIND-109
         URL: http://issues.apache.org/jira/browse/HIVEMIND-109
     Project: HiveMind
        Type: Improvement
  Components: framework  
    Versions: 1.1    
    Reporter: Stefan Liebig


The current (HM 1.1 alpha 3) support for overriding of services is not sufficent, because it is based on a ´same-module´ semantic and does not make its intention explicit.

A solution is requiered which allows to
- declare a service in a module
- provide a (default) implementation in another module
- provide an ´override´ in a third module

Additionally the intent of the developer(s) should be made explicit, i.e. it should be possible to express that an implementation:
- is the default implementation
- is thought to be overridable
- is thought to be the overriding implementation (should this require the existence of a default overridable implementation?)

Any conflicts (more that one overide, ..) should be reported as an error.

Such a solution is requiered because we build a framework where services are declared in a base module and implmentations are provided in client/server specific modules. Some of these ´default´ implementations should be overridable by the users of the framework to provide some special behaviour.

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