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From Jean-Baptiste Onofré (JIRA) <j...@apache.org>
Subject [jira] [Resolved] (KARAF-5107) Allow hooking into the feature installation process
Date Mon, 01 May 2017 14:24:04 GMT

     [ https://issues.apache.org/jira/browse/KARAF-5107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jean-Baptiste Onofré resolved KARAF-5107.
    Resolution: Fixed

> Allow hooking into the feature installation process
> ---------------------------------------------------
>                 Key: KARAF-5107
>                 URL: https://issues.apache.org/jira/browse/KARAF-5107
>             Project: Karaf
>          Issue Type: New Feature
>          Components: karaf-feature
>    Affects Versions: 4.0.9, 4.1.1
>            Reporter: Robert Varga
>            Assignee: Jean-Baptiste Onofré
>             Fix For: 4.2.0, 4.1.2
> Feature service should expose a way to hook into the feature:install process, so components
living inside container can understand when a bulk bundle operation starts, ends and reaches
a major milestone.
> This ability is needed to optimize OpenDaylight startup/shutdown procedures, as exemplified
by https://bugs.opendaylight.org/show_bug.cgi?id=7925 and https://bugs.opendaylight.org/show_bug.cgi?id=7927.
In these cases we are scanning deployed bundles  for well-known file locations as the bundles
get resolved. These files are then used to compile the effective model of the run-time world
(which is an expensive operation).
> Since there is no way to understand that an install transaction is going on, the model
is invalidated whenever a bundle is resolved and or stopped, leading to multiple compilations
(and oftentime failures, as all requirements are not yet met) during a single feature:install
invocation or framework shutdown.
> This requires having callbacks invoked from Deployer.deploy() for:
> 1) just before any bundle operations are performed
> 2) once all bundles have been resolved, but not started
> 3) once the operation completes and before the next bundle movement starts

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