Tzu-Li (Gordon) Tai created FLINK-8190:
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Summary: Add extra FlinkKafkaConsumer constructors to expose
pattern-based topic subscription functionality
Key: FLINK-8190
URL: https://issues.apache.org/jira/browse/FLINK-8190
Project: Flink
Issue Type: New Feature
Components: Kafka Connector
Reporter: Tzu-Li (Gordon) Tai
Assignee: Tzu-Li (Gordon) Tai
Fix For: 1.4.0, 1.5.0
The required internals for pattern-based topic discovery was implemented as
part of FLINK-6022 (along with partition discovery). However, the functionality
for pattern-based topic discovery was not yet exposed via any visible
constructor on the version-specific subclasses of {{FlinkKafkaConsumerBase}}.
I propose to add two more constructors for this:
{code}
public FlinkKafkaConsumerXX(Pattern subscriptionPattern,
DeserializationSchema<T> schema, Properties props);
public FlinkKafkaConsumerXX(Pattern subscriptionPattern,
KeyedDeserializationSchema<T> schema, Properties props);
{code}
This allows the consumer to pick up all matching topics on startup.
To continuously pick up matching topics on the fly when they are created after
the job has already started running, users should additionally set the
{{KEY_PARTITION_DISCOVERY_INTERVAL_MILLIS}} property, as they would do for
partition discovery.
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