private void registerAndMarkMeter(String requestMeter) {
      if (requestMeter.isEmpty()) {
        return;
      }
      if (!registry.get(requestMeter).isPresent()) {
        metrics.add(requestMeter);
      }
      registry.meter(requestMeter).mark();
    }
Get regionId from Ops such as: get, put, delete.
@param op such as get, put or delete.
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MetaTableMetrics.java