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https://issues.apache.org/jira/browse/KAFKA-3914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15416050#comment-15416050
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ASF GitHub Bot commented on KAFKA-3914:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/1576
> Global discovery of state stores
> --------------------------------
>
> Key: KAFKA-3914
> URL: https://issues.apache.org/jira/browse/KAFKA-3914
> Project: Kafka
> Issue Type: Sub-task
> Components: streams
> Affects Versions: 0.10.1.0
> Reporter: Damian Guy
> Assignee: Damian Guy
> Fix For: 0.10.1.0
>
>
> - Update group membership data to include discovery endpoints
> - Enable discovery
> We need to attach some host and port information to
> {{org.apache.kafka.streams.processor.internals.assignment.SubscriptionInfo}}
> This can then be used in
> {{org.apache.kafka.streams.processor.internals.StreamPartitionAssignor}} to
> build a {{Map<HostState, Set<TopicPartition>>}} that should be added to
> {{org.apache.kafka.streams.processor.internals.assignment.AssignmentInfo}}
> during the {{assign}} call.
> When {{StreamPartitionAssignor.onAssignment}} is called we should hold on to
> a copy of the {{Map<HostState, Set<TopicPartition>>}} for use by the
> discovery methods
> To enable discovery, implement the below methods on {{KafkaStreams}}
> {code}
> /**
> * @return metadata about all tasks
> */
> Map<HostState, Set<TaskMetadata>> getAllTasks();
> /**
> * @param storeName requested store name
> * @return metadata about all tasks that include
> * storeName in this KStreams instance
> */
> Map<HostState, Set<TaskMetadata>> getAllTasksWithStore(String storeName);
> /**
> * @param key requested key
> * @param storeName requested store name
> * @return metadata about all tasks that include
> * storeName and key in this KStreams instance
> */
> <K> Map<HostState, Set<TaskMetadata>> getAllTasksWithKey(String storeName, K
> key);
> {code}
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