Monitor Kafka Stats

Hi

I am trying to get some parameters from kafka like Data produced per
second,
Data Consumed per second etc.

There is a java api in Kafka "kafka.network.SocketServerStats" that i am using
for my purpose :

socketServerStats.getNumProduceRequests());
socketServerStats.getNumFetchRequests();
socketServerStats.getProduceRequestsPerSecond();

But its not giving any values.

Any suggestion will be helpful for me.