This function reads messages received by a KAFKA consumer. It returns a batch of messages
rkafka.readPoll(ConsumerObj)Array of Strings
Consumer through which messages are to be read Required:Mandatory Type:Consumer
Shruti Gupta
This function returns messages as a batch from the topic to which the consumer is associated. If no new message is found with 'x' time(set by ConsumerTimeoutMs property), then it returns ""
To know when to use simple consumer and when to use High-level Consumer, refer the url below: https://cwiki.apache.org/confluence/display/KAFKA/0.8.0+SimpleConsumer+Example
To know how to use a high level consumer refer this: https://cwiki.apache.org/confluence/display/KAFKA/Consumer+Group+Example