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https://issues.apache.org/jira/browse/NIFI-2208?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph Witt resolved NIFI-2208.
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Resolution: Fixed
> Support Custom Properties in Expression Language - 1.x baseline
> ---------------------------------------------------------------
>
> Key: NIFI-2208
> URL: https://issues.apache.org/jira/browse/NIFI-2208
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Yolanda M. Davis
> Priority: Blocker
> Labels: documentation, migration
> Fix For: 1.0.0
>
>
> NIFI-1974 addressed this for the 0.x baseline but the PR does not apply
> cleanly to the 1.x baseline. Creating a separate JIRA for 1.x so that we can
> close out NIFI-1974 since 0.7.0 is ready to be released.
> The VariableRegistry is:
> - User defined properties
> - System Properties (at startup)
> - OS Environment Variables (at startup)
> Then for substitution the values can be replaced using the following logic in
> the following order
> 1) Any supplied attribute maps (in order)
> 2) If flow file supplied then its properties
> 3) If flow file supplied then its attributes
> 4) Variable Registry (and its ordering as shown above).
> Finally the following processor properties should be enabled to support
> expression language:
> Put HDFS/Get HDFS/List HDFS
> - Directory property
> ConsumeJMS/PublishJMS
> - Destination Name property
> MS Connection Factory Provider
> -MQ ConnectionFactory Implementation (fqn classname)
> -MQ client library path
> -Broker URI
> DBCP Connection Pool:
> -Database Connection URL
> -Database Driver Class Name
> -DB Driver jar url
> -DB username
> -DB password
> ConvertCSVToAvro
> -add EL support for the following property
> -csv charset
> -and below...
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