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https://issues.apache.org/jira/browse/BEAM-7310?focusedWorklogId=375668&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-375668
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ASF GitHub Bot logged work on BEAM-7310:
----------------------------------------
Author: ASF GitHub Bot
Created on: 22/Jan/20 15:50
Start Date: 22/Jan/20 15:50
Worklog Time Spent: 10m
Work Description: iemejia commented on pull request #10563: [BEAM-7310]
Add support of Confluent Schema Registry for KafkaIO
URL: https://github.com/apache/beam/pull/10563#discussion_r369635832
##########
File path:
sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaIO.java
##########
@@ -175,6 +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:
nit: can you make this by default a secure connection in the example e.g.
`https`
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Issue Time Tracking
-------------------
Worklog Id: (was: 375668)
Time Spent: 7h 10m (was: 7h)
> 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: 7h 10m
> 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
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