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From AJ Chen <ajc...@web2express.org>
Subject Re: dynamic produce and consume new topics
Date Fri, 12 Jun 2020 22:25:40 GMT
I figured out this approach to consume new topics that become available at
runtime:
1. create ConcurrentMessageListenerContainer for each new topic, call
start() to start listening.
2. track all containers in a map, which listen and consume messages from
the assigned topics.
3. call container.stop() when shutdown.

Is there anything important I should add to make it more robust? Appreciate
any suggestions.

-aj

On Fri, Jun 12, 2020 at 12:55 PM AJ Chen <ajchen@web2express.org> wrote:

> Thanks, Boyang.
>
> Spring''s KafkaTemplate can easily create new topic on the flight
> already.
>
> On consumer side, is there java sample code to replace this annotation?
> That will create a new listener for a new topic and group-id on the
> fliight.
>  @KafkaListener(topics = "test", groupId = "grp0")
>
> -aj
>
> On Fri, Jun 12, 2020 at 9:30 AM Boyang Chen <reluctanthero104@gmail.com>
> wrote:
>
>> Hey AJ,
>>
>> you should be able to make the subscribed topics and output topics dynamic
>> configs for Consumer and Producer. If you need to create new topics on
>> runtime, there is some broker side setting you could use to allow topic
>> creation based of produced records:
>>
>> https://stackoverflow.com/questions/36441768/how-to-create-topics-in-apache-kafka
>>
>> On Fri, Jun 12, 2020 at 9:01 AM AJ Chen <canovaj@gmail.com> wrote:
>>
>> > I'm working on a data streaming system where users will publish to
>> > different new topics and subscribe to different new topics without
>> > restarting the system. A large number of topics will be created over
>> time.
>> > Uer will choose different new topics to publish and subscribe
>> dynamically
>> > at runtime. Can someone share good design or practice to implement such
>> > dynamic topic handling? Links to sample code will be very helpful.
>> >
>> > Thanks,
>> > aj
>> >
>>
>

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