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From Jean-Baptiste Onofré (JIRA) <j...@apache.org>
Subject [jira] [Resolved] (KARAF-1600) Avoid duplicate feature and bundle resolution when installing cascading features
Date Fri, 10 Aug 2012 03:24:41 GMT

     [ https://issues.apache.org/jira/browse/KARAF-1600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jean-Baptiste Onofré resolved KARAF-1600.
-----------------------------------------

    Resolution: Fixed
    
> Avoid duplicate feature and bundle resolution when installing cascading features
> --------------------------------------------------------------------------------
>
>                 Key: KARAF-1600
>                 URL: https://issues.apache.org/jira/browse/KARAF-1600
>             Project: Karaf
>          Issue Type: Improvement
>    Affects Versions: 2.2.8
>            Reporter: Raul Kripalani
>            Assignee: Gert Vanthienen
>              Labels: features
>             Fix For: 2.2.9, 2.3.0, 3.0.0
>
>
> Currently, if one has multiple features depending on each other, where the same features
or bundles are referenced twice or more, Karaf will attempt to resolve/install them as many
times as they are traversed.
> E.g., pseudo-code:
> {code}
> feature a, contains:
>   feature camel-core
>   feature camel-spring
>   bundle 1
>   bundle 2
> feature b, contains:
>   feature camel-jetty
>   feature camel-http
>   bundle 3
>   bundle 4
> feature all, contains:
>   feature a
>   feature b
> {code}
> When one installs feature "all", Karaf will end up resolving/attempting to install camel-core
multiple times as it hits it via transitive dependencies (via a, via camel-jetty, via camel-http,
etc.).
> As a result, an unnecessary delay is experienced and this could be optimised to perform
a two-phase feature installation procedure instead:
> - calculate the install plan (kind of like building an effective POM in Maven) and prune
duplicates
> - perform the install plan

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