code: public void addProducerCall(String producerId, long duration){
  		AnalyzedProducerCallsAO bean = beans.get(producerId);
  		if (bean==null){
  			bean = new AnalyzedProducerCallsAO(producerId);
  			beans.put(producerId, bean);
  		}
  		bean.addCall(duration);
  		
  		totalCalls++;
  		totalDuration+=duration;
  	}
docs: Adds a new producer call. The duration and the number of calls for each producer will be increased accordingly.
  @param producerId id of the producer.
  @param duration duration of the call.