[jira] [Closed] (NIFI-11743) Restrict FlowRegistryClient API to not allow null returns

["Simon Bence (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-11743?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Simon Bence closed NIFI-11743.
------------------------------

> Restrict FlowRegistryClient API to not allow null returns
> ---------------------------------------------------------
>
>                 Key: NIFI-11743
>                 URL: https://issues.apache.org/jira/browse/NIFI-11743
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>            Reporter: Simon Bence
>            Assignee: Simon Bence
>            Priority: Minor
>             Fix For: 2.0.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> The current definition of FlowRegistryClient allows implementations to return with a null value in cases such as list of buckets, flows or versions. In practice, this will not happen, but future implementations of changes has this option now.
> This is something we want to eliminate both because it is considered as a bad pattern and because NiFi expect a valid (but maybe empty) return value. From code perspective this will not cause any change, but the document will be extended accordingly and will communicate that null is not a valid return value.
> Even if this is not a code change and the current registry client behaves in this manner, it is considered as a breaking change thus this will be part of the 2.x line only.



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