[jira] [Resolved] (FLINK-8190) Add extra FlinkKafkaConsumer constructors to expose pattern-based topic subscription functionality

["Tzu-Li (Gordon) Tai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-8190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tzu-Li (Gordon) Tai resolved FLINK-8190.
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    Resolution: Fixed

> 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-4022 (along with partition discovery). However, the functionality for pattern-based topic discovery was not yet exposed via any visible user API on the version-specific subclasses of {{FlinkKafkaConsumerBase}}.
> I propose to add two more constructors for this:
> {code}
> public FlinkKafkaConsumerXX(java.util.regex.Pattern subscriptionPattern, DeserializationSchema<T> schema, Properties props);
> public FlinkKafkaConsumerXX(java.util.regex.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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