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https://issues.apache.org/jira/browse/KAFKA-183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jay Kreps resolved KAFKA-183.
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Resolution: Fixed
This is being done in the new consumer.
> Expose offset vector to the consumer
> ------------------------------------
>
> Key: KAFKA-183
> URL: https://issues.apache.org/jira/browse/KAFKA-183
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Jay Kreps
> Assignee: Jay Kreps
>
> We should enable consumers to save their position themselves. This would be
> useful for consumers that need to store consumed data so they can store the
> data and the position together, this gives a poor man's "transactionality"
> since any data loss on the consumer will also rewind the position to the
> previous position so the two are always in sync.
> Two ways to do this:
> 1. Add an OffsetStorage interface and have the zk storage implement this. The
> user can override this by providing an OffsetStorage implementation of their
> own to change how values are stored.
> 2. Make commit() return the position offset vector and add a
> setPosition(List<Long>) method to initialize the position.
> Let's figure out any potential problems with this, and work out the best
> approach.
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