[jira] [Work logged] (KNOX-2395) Make Gateway Services Pluggable

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KNOX-2395?focusedWorklogId=453621&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-453621 ]

ASF GitHub Bot logged work on KNOX-2395:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Jul/20 19:34
            Start Date: 01/Jul/20 19:34
    Worklog Time Spent: 10m 
      Work Description: smolnar82 opened a new pull request #358:
URL: https://github.com/apache/knox/pull/358


   THIS IS STILL IN WIP STAGE: I'm working on the unit tests (they have purposely missed out from this commit) as well as adding logs.
   I wanted to create this PR so that you guys can give me early feedback.
   
   ## What changes were proposed in this pull request?
   
   From now on end-users can select different implementation for certain Knox services (where there are more than one implementations) through a newly introduced `gateway-site.xml` configuration called `gateway.services`.
   The format of this configuration is: `service1:impl1[, services:impl2,...]`
   `DefaultGatewayServices` and `CLIGatewayServices` have been modified to use the new service factories.
   
   ## How was this patch tested?
   
   Ran the `knoxcli` tool:
   - created the master secret
   - added/listed some aliases
   
   Started the Knox Gateway:
   - checked the home page
   - logged into the Admin UI
      - modified the 'sandbox' topology
      - modified a service definition (one that was listed in `sandbox`, confirmed that it got redeployed)
      


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Issue Time Tracking
-------------------

            Worklog Id:     (was: 453621)
    Remaining Estimate: 0h
            Time Spent: 10m

> Make Gateway Services Pluggable
> -------------------------------
>
>                 Key: KNOX-2395
>                 URL: https://issues.apache.org/jira/browse/KNOX-2395
>             Project: Apache Knox
>          Issue Type: Improvement
>          Components: Server
>    Affects Versions: 1.4.0
>            Reporter: Philip Zampino
>            Assignee: Sandor Molnar
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> For at least some gateway services, it would be useful to provide the ability to choose an implementation without requiring a code change (as it is today).
> Either DefaultGatewayServices should reference gateway-site configuration for default implementation overrides, OR the default implementations of the affected services should do the same.
> Being able to effect behavior through config in this way will make Knox more pluggable, not merely extensible.



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