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From "Tzu-Li (Gordon) Tai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-4582) Allow FlinkKinesisConsumer to adapt for AWS DynamoDB Streams
Date Tue, 06 Sep 2016 13:07:20 GMT
Tzu-Li (Gordon) Tai created FLINK-4582:
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             Summary: Allow FlinkKinesisConsumer to adapt for AWS DynamoDB Streams
                 Key: FLINK-4582
                 URL: https://issues.apache.org/jira/browse/FLINK-4582
             Project: Flink
          Issue Type: New Feature
          Components: Kinesis Connector, Streaming Connectors
            Reporter: Tzu-Li (Gordon) Tai
             Fix For: 1.2.0


AWS DynamoDB is a NoSQL database service that has a CDC-like (change data capture) feature
called DynamoDB Streams (http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Streams.html),
which is a stream feed of item-level table activities.

The DynamoDB Streams shard abstraction follows that of Kinesis Streams with only a slight
difference in resharding behaviours, so it is possible to build on the internals of our Flink
Kinesis Consumer for an exactly-once DynamoDB Streams source.

I propose an API something like this:
{code}
DataStream dynamoItemsCdc = 
  FlinkKinesisConsumer.asDynamoDBStream(tableNames, schema, config)
{code}

The feature adds more connectivity to popular AWS services for Flink, and combining what Flink
has for exactly-once semantics and out-of-core state backends with CDC can have very strong
use cases. For this feature there should only be an extra dependency to the AWS Java SDK for
DynamoDB, which has Apache License 2.0.



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