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Subject [GitHub] [pulsar] liketic commented on issue #3733: support Pattern subscribe in kafka compat client
Date Sat, 09 Mar 2019 11:46:47 GMT
liketic commented on issue #3733: support Pattern subscribe in kafka compat client
URL: https://github.com/apache/pulsar/issues/3733#issuecomment-471170264
   Thank you @jiazhai @sijie . The method ```subscribe``` https://github.com/apache/pulsar/blob/41b286dc0cc7b6ca3aa24acfccd53dfed547c0c5/pulsar-client-kafka-compat/pulsar-client-kafka/src/main/java/org/apache/kafka/clients/consumer/PulsarKafkaConsumer.java#L215

   lists all partitions for each topic and create a ```TopicPartition``` instance for each
pair of them, and update the member variables ```consumers``` and ```unpolledPartitions```
for later use.
   What I mean is if we need to do the same things, try to get all topics matched the pattern
and then get all partitions for each topic...  , which means we need a method to list all
topics based on a regex in client.
   Otherwise, what I can think of is something like:
       public void subscribe(Pattern pattern, ConsumerRebalanceListener callback) {
           ConsumerBuilder<byte[]> consumerBuilder = PulsarConsumerKafkaConfig.getConsumerBuilder(client,
           try {
           } catch (Exception ex) {
               throw new RuntimeException(ex);

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