BewareMyPower commented on issue #12087:
URL: https://github.com/apache/pulsar/issues/12087#issuecomment-923534386
I think our goal is to configure multiple converters and choose the proper
one for the message. Since I missed the case in this PIP, I merged them into
one. You're right that the `accept` method should be separated.
> If we explicitly add a metadata field "messageFormat" to the metadata
But existing messages don't have this field, for example, KoP adds the
property `entry.format=kafka` to mark messages as Kafka format. I think the
detail steps should be:
1. Check the `format` field of metadata
2. If it's set, lookup the converter according to the `format` field
1. fail: report an error to the user and prevent the application to
process garbage
2. process the conversion
3. Otherwise, iterate over all converters to find the first converter that
accepts the message.
1. If no converter was found, fallback to the default converter that
returns the payload simply.
2. Process the conversion.
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