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https://issues.apache.org/jira/browse/SLING-7768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17018222#comment-17018222
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Carsten Ziegeler commented on SLING-7768:
-----------------------------------------
The Felix interpolation plugin is here:
https://github.com/apache/felix/tree/trunk/configadmin-plugins/interpolation/src/main/java/org/apache/felix/configadmin/plugin/interpolation
> Add String Interpolation support to /etc/map
> --------------------------------------------
>
> Key: SLING-7768
> URL: https://issues.apache.org/jira/browse/SLING-7768
> Project: Sling
> Issue Type: Improvement
> Components: ResourceResolver
> Environment: Sling 11-SNAPSHOT, JDK 1.8
> Reporter: Andreas Schaefer
> Priority: Major
> Attachments: Screenshot 2018-07-06 11.41.58.png, Screenshot
> 2018-07-06 11.42.41.png, Screenshot 2018-07-06 11.43.34.png
>
>
> Having worked on migrations of a Sling derivate Ruben & I ran into issues
> where the /etc/map would map to production instead of testing environment.
> Many big customer have extensive /etc/maps and also many different
> environments like dev, qa, staging, prod etc.
> It would be great to have a tool where for example items like the host name
> or external links in /etc/map could be configured outside so that just one
> entry has to adjusted rather than creating a full copy of the /etc/map tree.
>
> Example:
>
> /etc/map/http/{{{{phv.fq.host.name}}}}.8080
>
> Placeholder provides:
> DEV: phv.fq.host.name=localhost
> QA: phv.fq.host.name=qa.author.acme.com
> STAGING:
> phv.fq.host.name=[staging.author.acme.com|http://staging.author.acme.com/]
> PROD: phv.fq.host.name=[acme.com|http://acme.com/]
>
> At runtime these are the resolved values:
> DEV: http/localhost.8080
> QA: http/qa.author.acme.com.8080
> STAGING: http/[staging.author.acme.com|http://staging.author.acme.com/].8080
> PROD: http/[acme.com|http://acme.com/].8080
>
> Not only does that make it easier and faster to create new test environments
> but it also cuts down on the chance of copy-n-paste errors.
>
> I have a working POC with an PlaceholderProvider OSGi service and an
> enhanced MapEntries that resolved any placeholders if found.
>
> Attached are 3 screenshots:
> 1. OSGi Placeholder Provider Configuration
> 2. /etc/map (Composum)
> 3. Result of [http://andreass.local:8080/] call
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