title: Sink several Kafka topics to s3 under different paths
body: <p>With the release of Flink 1.4 the FlinkKafkaConsumer011 has the functionality to pass a regex in for topics to read— a rad feature btw. Now I’m wondering if there is a way for a single Flink application to sink each of those topics (Avro messages) using the BucketingSink to separate locations in  s3. For example:</p>
  
  <pre><code>s3://bucket/topic_1
  s3://bucket/topic_2
  s3://bucket/topic_3
  .
  .
  .
  s3://bucket/topic_n
  </code></pre>
  
  <p>Any pointers on how to achieve this would be very much appreciated!</p>