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https://issues.apache.org/jira/browse/NIFI-764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16523960#comment-16523960
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Peter Wicks commented on NIFI-764:
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I think this can be cancelled/closed as covered by the updates in past versions
to Variables.
> Add support for global variables
> --------------------------------
>
> Key: NIFI-764
> URL: https://issues.apache.org/jira/browse/NIFI-764
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework, Core UI
> Reporter: Matt Gilman
> Priority: Minor
>
> Add support for global variables (possibly scoped at a group level). These
> could be used within NiFi expression language providing support for more
> portable templates and bulk configuration changes.
> The general idea is that the user will be able to define a variable name and
> value and then use it within expression language. At this point they would be
> able to export a template with components referencing the variables. When
> imported into another NiFi instance with the same variables defined, it
> provides an easy way to move a flow between different environment and update
> it's configuration in a single action (like when values for development and
> production differ per instance).
> Another benefit of an approach like this, it that it could allow for bunk
> edits. If multiple components reference the same variable (e.g.
> xxxx.post.uri), it allows the user to make that change in a single location
> rather than having to identify each instance of that value. Will obviously
> need to consider the mechanics when modifying a variable as it will require
> all referencing components to be stopped.
>
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