In general, it's not recommended to call external APIs. Instead, you should try to get the external data into a TABLE in ksqlDB and do a stream-table join. Not sure if this would be possible for you use case.
It might be possible to write a UDF though... But given that the external call might fail, and you should not "block" inside the UDF it's would be a brittle approach. Using Kafka Streams would give you more flexibility to do an external API can and handle failed requests and retries. -Matthias On 5/5/21 9:53 AM, Greer, Andrew C wrote: > Hello, > > I am looking for options to call an external API within KSQL. My goal is to > connect a Stream to a topic containing message data, call an API using some > of that data, then produce updated data to new topics. Is there a known way > for doing this? If not, any alternatives? > > Thank you for any future help, > > Andrew > >
