private String getTableNameFromOp(Row op) {
      final String tableRowKey = Bytes.toString(op.getRow());
      if (StringUtils.isEmpty(tableRowKey)) {
        return null;
      }
      final String[] splits = tableRowKey.split(",");
      return splits.length > 0 ? splits[0] : null;
    }
Get table name 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