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From Fabian Hueske <fhue...@gmail.com>
Subject Re: [DISCUSS] Merge batch and stream connector modules
Date Tue, 22 Nov 2016 08:08:59 GMT
Hi all,

should we do this refactoring for the 1.2 release?
If yes, I'll prepare a PR for that.

Cheers,
Fabian

2016-09-26 13:55 GMT+02:00 Fabian Hueske <fhueske@gmail.com>:

> Thanks everybody for your comments.
>
> I opened FLINK-4676 [1] for merging the connector modules.
>
> [1] https://issues.apache.org/jira/browse/FLINK-4676
>
> 2016-09-26 13:17 GMT+02:00 Robert Metzger <rmetzger@apache.org>:
>
>> +1 good suggestion.
>>
>> On Mon, Sep 26, 2016 at 1:03 PM, Stephan Ewen <sewen@apache.org> wrote:
>>
>> > The module would have both dependencies, but both are provided anyways,
>> so
>> > that would not be much of an issue, I think.
>> >
>> > On Mon, Sep 26, 2016 at 12:25 PM, Till Rohrmann <trohrmann@apache.org>
>> > wrote:
>> >
>> > > I think this only holds true for modules which depend on the batch or
>> > > streaming counter part, respectively. We could refactor these modules
>> by
>> > > pulling out common types which are independent of streaming/batch and
>> are
>> > > used by the batch and streaming module.
>> > >
>> > > Cheers,
>> > > Till
>> > >
>> > > On Fri, Sep 23, 2016 at 11:15 AM, Aljoscha Krettek <
>> aljoscha@apache.org>
>> > > wrote:
>> > >
>> > > > I don't think it's that easy. The streaming connectors have
>> > > flink-streaming
>> > > > as dependency while the batch connectors have the batch
>> dependencies.
>> > > >
>> > > > Combining them would mean that users always have all dependencies,
>> > right?
>> > > >
>> > > > On Thu, 22 Sep 2016 at 15:41 Stephan Ewen <sewen@apache.org>
wrote:
>> > > >
>> > > > > +1 for Fabian's suggestion
>> > > > >
>> > > > > On Thu, Sep 22, 2016 at 3:25 PM, Swapnil Chougule <
>> > > > the.swapnil09@gmail.com
>> > > > > >
>> > > > > wrote:
>> > > > >
>> > > > > > +1
>> > > > > > It will be good to have one module flink-connectors (union
of
>> > > streaming
>> > > > > and
>> > > > > > batch connectors).
>> > > > > >
>> > > > > > Regards,
>> > > > > > Swapnil
>> > > > > >
>> > > > > > On Thu, Sep 22, 2016 at 6:35 PM, Fabian Hueske <
>> fhueske@gmail.com>
>> > > > > wrote:
>> > > > > >
>> > > > > > > Hi everybody,
>> > > > > > >
>> > > > > > > right now, we have two separate Maven modules for batch
and
>> > > streaming
>> > > > > > > connectors (flink-batch-connectors and
>> > flink-streaming-connectors)
>> > > > that
>> > > > > > > contain modules for the individual external systems
and
>> storage
>> > > > formats
>> > > > > > > such as HBase, Cassandra, Avro, Elasticsearch, etc.
>> > > > > > >
>> > > > > > > Some of these systems can be used in streaming as well
as
>> batch
>> > > jobs
>> > > > as
>> > > > > > for
>> > > > > > > instance HBase, Cassandra, and Elasticsearch. However,
due to
>> the
>> > > > > > separate
>> > > > > > > main modules for streaming and batch connectors, we
currently
>> > need
>> > > to
>> > > > > > > decide where to put a connector. For example, the
>> > > > > > flink-connector-cassandra
>> > > > > > > module is located in flink-streaming-connectors but
includes a
>> > > > > > > CassandraInputFormat and CassandraOutputFormat (i.e.,
a batch
>> > > source
>> > > > > and
>> > > > > > > sink).
>> > > > > > >
>> > > > > > > In my opinion, it would be better to just merge
>> > > > flink-batch-connectors
>> > > > > > and
>> > > > > > > flink-streaming-connectors into a joint flink-connectors
>> module.
>> > > > > > >
>> > > > > > > This would be only an internal restructuring of code
and not
>> be
>> > > > visible
>> > > > > > to
>> > > > > > > users (unless we change the module names of the individual
>> > > connectors
>> > > > > > which
>> > > > > > > is not necessary, IMO).
>> > > > > > >
>> > > > > > > What do others think?
>> > > > > > >
>> > > > > > > Best, Fabian
>> > > > > > >
>> > > > > >
>> > > > >
>> > > >
>> > >
>> >
>>
>
>

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