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Posted to dev@sling.apache.org by "Carsten Ziegeler (JIRA)" <ji...@apache.org> on 2012/10/02 07:27:07 UTC

[jira] [Assigned] (SLING-2612) Installer needs "install rules" to make certain operations optional

     [ https://issues.apache.org/jira/browse/SLING-2612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Carsten Ziegeler reassigned SLING-2612:
---------------------------------------

    Assignee: Carsten Ziegeler
    
> Installer needs "install rules" to make certain operations optional
> -------------------------------------------------------------------
>
>                 Key: SLING-2612
>                 URL: https://issues.apache.org/jira/browse/SLING-2612
>             Project: Sling
>          Issue Type: Improvement
>          Components: Installer
>    Affects Versions: Installer Core 3.3.8
>            Reporter: Bertrand Delacretaz
>            Assignee: Carsten Ziegeler
>
> The installer currently executes all its operations without checking if they make sense in the current environment, we need more granularity for a few use cases like the ones below.
> 1) SLING-2569: do not install some bundles depending on their headers and the current environment.
> 2) Depending on the current state of the world, a ResourceTransformer needs to behave differently. For example, do not activate a RegisteredResource that contains demo content, but just upload it to the content repository.
> Note that just ignoring resources would not cover case 2), where the "upload" operation happens but not the "activate" operation.
> We might use a new InstallRule interface for that, something like:
> // Service that provides a specific rule
> public interface InstallRule {
>   public boolean shouldExecute(String operation, RegisteredResource r);
> }
> The installer can then have a master InstallRule that queries all InstallRule services in sequence (ordered by service ranking) and ANDs the results.

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