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From "Valentin Mahrwald (JIRA)" <j...@apache.org>
Subject [jira] Created: (ARIES-506) Filter out deployments where an isolated bundle is provisioned twice to provide conflicting copies of a package
Date Fri, 03 Dec 2010 09:05:11 GMT
Filter out deployments where an isolated bundle is provisioned twice to provide conflicting
copies of a package
---------------------------------------------------------------------------------------------------------------

                 Key: ARIES-506
                 URL: https://issues.apache.org/jira/browse/ARIES-506
             Project: Aries
          Issue Type: Improvement
          Components: Application
    Affects Versions: 0.2, 0.1, 0.3
            Reporter: Valentin Mahrwald
            Assignee: Valentin Mahrwald
             Fix For: 0.3


The provisioning system currently will quite happily allow a number of corner cases where
bundles intend to share a service based on a common view of a package but end up wiring to
different package versions because of incompatible version ranges.

The most basic setup where this happens is an application with three isolated bundles: api,
consumer, provider. Consumer uses a service from producer based on an interface in package
P. Consumer consumes package P at [1.1.0,2.0.0) while producer uses P at [1.0.0,1.1.0). There
is two versions of api one exporting P at 1.0.0 and another exporting version 1.1.0 of P.
Note that this cannot work.

In this setup with the current resolver api will be provisioned twice: once as isolated content
and once as provisioned content providing a package to the isolated content. So despite the
fact that the scenario is invalid we produce a deployment.

Now, there are corner cases where the deployment would be valid when no service is shared
and the package should not be part of the isolated content in the first place. This scenario
should still be supported with an explicit use-bundle clause.

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