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ASF GitHub Bot logged work on BEAM-7310: ---------------------------------------- Author: ASF GitHub Bot Created on: 23/Jan/20 20:01 Start Date: 23/Jan/20 20:01 Worklog Time Spent: 10m Work Description: reuvenlax commented on pull request #10563: [BEAM-7310] Add support of Confluent Schema Registry for KafkaIO URL: https://github.com/apache/beam/pull/10563#discussion_r370324735 ########## File path: sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaIO.java ########## @@ -165,6 +175,30 @@ * <br> * 3. Start from <em>latest</em> offset by default; * + * <h3>Use Avro schema with Confluent Schema Registry</h3> + * + * <p>If the message keys or/and values in a topic were serialised by Avro schema stored in + * Confluent Schema Registry, KafkaIO source can fetch this schema from specified Schema Registry + * URL and use it for deserialization further. As an output, it will return a {@link PCollection} of + * {@link KafkaRecord}s where key or/and value will be typed as {@link + * org.apache.avro.generic.GenericRecord}. In this case, users don't need to specify key or/and + * value deserializers and coders since they will be set to {@link KafkaAvroDeserializer} and {@link + * AvroCoder} by default accordingly. + * + * <p>For example, below topic values are serialized with Avro schema stored in Schema Registry, + * keys are typed as {@link Long}: + * + * <pre>{@code + * PCollection<KafkaRecord<Long, GenericRecord>> input = pipeline + * .apply(KafkaIO.<Long, GenericRecord>read() + * .withBootstrapServers("broker_1:9092,broker_2:9092") + * .withTopic("my_topic") + * .withSchemaRegistry(""http://localhost:8081"") // Confluent Schema Registry URL Review comment: How does this work if reading from multiple topics (using read().withTopics()? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 376514) Time Spent: 8.5h (was: 8h 20m) > Confluent Schema Registry support in KafkaIO > -------------------------------------------- > > Key: BEAM-7310 > URL: https://issues.apache.org/jira/browse/BEAM-7310 > Project: Beam > Issue Type: Improvement > Components: io-java-kafka > Affects Versions: 2.12.0 > Reporter: Yohei Shimomae > Assignee: Alexey Romanenko > Priority: Minor > Time Spent: 8.5h > Remaining Estimate: 0h > > Confluent Schema Registry is useful when we manage Avro Schema but KafkaIO > does not support Confluent Schema Registry as discussed here. > https://stackoverflow.com/questions/56035121/unable-to-connect-from-dataflow-job-to-schema-registry-when-schema-registry-requ > https://lists.apache.org/thread.html/7695fccddebd08733b80ae1e43b79b636b63cd5fe583a2bdeecda6c4@%3Cuser.beam.apache.org%3E -- This message was sent by Atlassian Jira (v8.3.4#803005)