GitHub user Bekreth opened a pull request:

    [FLINK-9165] [DataSink] Upgrading CassandraSinkBase to submit collections

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    ## Contribution Checklist
      - Make sure that the pull request corresponds to a [JIRA 
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    **(The sections below can be removed for hotfixes of typos)**
    ## What is the purpose of the change
    Initial issue : []
    Currently the CassandraSinkBase can only handle single objects.  This PR 
aims to add the ability to submit collections.
    ## Brief change log
    *Overloaded `send()` method in the CassandraSinkBase to handle collections. 
 Cascaded this change into all classes extending the CassandraSinkBase.
    ## Verifying this change
    Verified this tooling in local projects.  Testing will be including 
following discussion on implementation.
    ## Does this pull request potentially affect one of the following parts:
      - Dependencies (does it add or upgrade a dependency): no
      - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: no
      - The serializers: no
      - The runtime per-record code paths (performance sensitive): no
      - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: no
      - The S3 file system connector: no
    ## Documentation
      - Does this pull request introduce a new feature? yes
      - If yes, how is the feature documented? This features functionality is 
trivial and in line with current documentation.

You can merge this pull request into a Git repository by running:

    $ git pull sinkCollections

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #5844
commit 46a94824d64eef69015f586ce0319a603b2f9bb3
Author: chugh13 <>
Date:   2018-04-12T20:29:07Z

    Added in functionality to AbstractCassandraTupleSink and all its children 
to submit collections of tuples.

commit 2779b64e615f836f8fc0d6deacf14201bc55c183
Author: chugh13 <>
Date:   2018-04-12T20:30:31Z

    Merge branch 'master' into sinkCollections



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