Mark Payne created NIFI-8661:
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Summary: Update Record Reader/Writer lookup services to not
require specific attributes exist
Key: NIFI-8661
URL: https://issues.apache.org/jira/browse/NIFI-8661
Project: Apache NiFi
Issue Type: Improvement
Components: Extensions
Reporter: Mark Payne
Assignee: Mark Payne
NIFI-5829 introduced a ReaderLookup service and a RecordSetWriterLookup
service. However, these services make the assumption that the reader/writer to
use exists on an attribute of the flowfile such as {{recordreader.name}}. This
means that these services are not applicable for many situations, especially
for source processors.
A more convenient way would be to just add a property to these services
indicating the name of the service to use, instead of expecting that an
attribute with that name exists. We can set the default value of the property
to `${recordreader.name}` etc. in order to maintain backward compatibility.
But this gives us the flexibility, for example, to use this in
ConsumeKafkaRecord where kafka message headers are available in Expression
Language and also gives us the ability to use a parameter for specifying the
data format to use.
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