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From "Joseph Percivall (JIRA)" <>
Subject [jira] [Commented] (MINIFI-424) Expose bootstrap properties in the ConfigTransformer
Date Fri, 12 Jan 2018 23:27:00 GMT


Joseph Percivall commented on MINIFI-424:

Any ideas what we could use for the "escape" identifiers are welcome.

> Expose bootstrap properties in the ConfigTransformer
> ----------------------------------------------------
>                 Key: MINIFI-424
>                 URL:
>             Project: Apache NiFi MiNiFi
>          Issue Type: New Feature
>            Reporter: Joseph Percivall
>            Assignee: Joseph Percivall
> The ConfigTransformer takes in the config.yml and creates the and flow.xml.
In order to better support customizations on a per MiNiFi instance for things that aren't
able to reference EL, we could expose the properties listed in the bootstrap.conf. 
> As an example, the bootstrap conf could have properties identifying the S2S URL and port
UUID to use. Then when MiNiFi pulls down the new config.yml it would translate the keys to
their proper values as identified in the bootstrap.conf.
> The main unknown is what the "escape" identifiers would be. In EL it is "${.....}". This
would need to be specific enough that it doesn't collide with anything that'd be in the config.yml.
> Much further down the line, this could eventually evolve to expose ENV variables, key/values
stored in a file, and maybe even basic functions as needed. Essentially a basic version of
EL but I hesitate to call it that b/c I don't want users to expect all of that functionality.
This should really be for things that can't be done via EL.

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