How to use

startSubscription

method

in

org.apache.samza.system.kafka.KafkaSystemConsumer

@Override
public void start() {
 if (!started.compareAndSet(false, true)) {
  LOG.warn("{}: Attempting to start the consumer for the second (or more) time.", this);
  return;
 }
 if (stopped.get()) {
  LOG.error("{}: Attempting to start a stopped consumer", this);
  return;
 }
 // initialize the subscriptions for all the registered TopicPartitions
 startSubscription();
 // needs to be called after all the registrations are completed
 setFetchThresholds();
 startConsumer();
 LOG.info("{}: Consumer started", this);
}

@Override
public void start() {
 if (!started.compareAndSet(false, true)) {
  LOG.warn("{}: Attempting to start the consumer for the second (or more) time.", this);
  return;
 }
 if (stopped.get()) {
  LOG.error("{}: Attempting to start a stopped consumer", this);
  return;
 }
 // initialize the subscriptions for all the registered TopicPartitions
 startSubscription();
 // needs to be called after all the registrations are completed
 setFetchThresholds();
 startConsumer();
 LOG.info("{}: Consumer started", this);
}

@Override
public void start() {
 if (!started.compareAndSet(false, true)) {
  LOG.warn("{}: Attempting to start the consumer for the second (or more) time.", this);
  return;
 }
 if (stopped.get()) {
  LOG.error("{}: Attempting to start a stopped consumer", this);
  return;
 }
 // initialize the subscriptions for all the registered TopicPartitions
 startSubscription();
 // needs to be called after all the registrations are completed
 setFetchThresholds();
 startConsumer();
 LOG.info("{}: Consumer started", this);
}