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Posted to issues@nifi.apache.org by "David Handermann (Jira)" <ji...@apache.org> on 2022/03/30 18:20:00 UTC

[jira] [Created] (NIFI-9850) Add support for Multiple Expressions to GrokReader

David Handermann created NIFI-9850:
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             Summary: Add support for Multiple Expressions to GrokReader
                 Key: NIFI-9850
                 URL: https://issues.apache.org/jira/browse/NIFI-9850
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Extensions
            Reporter: David Handermann
            Assignee: David Handermann


The {{GrokReader}} service includes a single property named {{{}Grok Expression{}}}, which the Reader uses to parse input lines. This approach requires the configured {{Grok Expression}} to handle all possible formats for input lines.

The {{GrokReader}} should be enhanced to support multiple expressions that the Reader can use when attempting to parse input lines. The Reader should follow the configured order of multiple expressions.

Support for multiple expressions could be configured using the property value itself, or through a file that could be referenced from an external location.

The implementation should maintain compatibility with the current {{{}GrokReader{}}}.



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