Another strategy to handle dynamic topics: SInce Spring Kafka MessageListenerContainer holds a list of topics, can we simply add a new topic into the existing container at runtime? Does the existing listener container object require a manual stop/start after its topic list changes?
thanks, -aj On Fri, Jun 12, 2020 at 3:25 PM AJ Chen <ajc...@web2express.org> wrote: > 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 <ajc...@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 <reluctanthero...@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 <cano...@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 >>> > >>> >>
