tzulitai commented on a change in pull request #6078: [FLINK-9438] Add
documentation for AvroDeserializationSchema
URL: https://github.com/apache/flink/pull/6078#discussion_r206077589
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File path: docs/dev/connectors/kafka.md
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@@ -166,6 +166,39 @@ For convenience, Flink provides the following schemas:
The KeyValue objectNode contains a "key" and "value" field which contain
all fields, as well as
an optional "metadata" field that exposes the offset/partition/topic for
this message.
+3. `AvroDeserializationSchema` which reads data serialized with Avro format
using statically provided schema. It can
+ infer the schema from avro generated classes
(`AvroDeserializationSchema.forSpecific(...)`) or it can work with
`GenericRecords`
+ with manually provided schema (with
`AvroDeserializationSchema.forGeneric(...)`). This deserialization schema
expects that
+ the serialized records DO NOT contain embedded schema.
+
+ - There is also version of this schema available that can lookup writers
schema (schema which was used to write the record) in
+ [Confluent Schema
Registry](https://docs.confluent.io/current/schema-registry/docs/index.html).
Using these deserialization schema
+ record will be read with the schema that was retrieved from Schema
Registry and transformed to statically provided( either through
+ `ConfluentRegistryAvroDeserializationSchema.forGeneric(...)` or
`ConfluentRegistryAvroDeserializationSchema.forSpecific(...)`).
+
+ <br>To use this deserialization schema one has to add additional
dependency:
Review comment:
... one has to add the following additional dependencies ...
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