code: public void update(long throughput) {
          if (LOG.isDebugEnabled()) {
              LOG.debug("Received throughput of " + throughput + " on channel - " + this.channel.getComponentName());
          }
          this.throughput = throughput;
      }
docs: Method used by the Esper subscriber contract where the payload of the
  event is passed to the subscriber. In this case the payload is a
  calculated throughput.
  
  @param throughput
  the calculated throughput for the channel