content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.carbondata.core.stats;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.carbondata.common.logging.LogServiceFactory;
  import org.apache.carbondata.common.logging.impl.StatisticLevel;
  
  import org.apache.log4j.Logger;
  
  /**
   * Class will be used to record and log the query statistics
   */
  public class QueryStatisticsRecorderImpl implements QueryStatisticsRecorder, Serializable {
  
    private static final Logger LOGGER =
        LogServiceFactory.getLogService(QueryStatisticsRecorderImpl.class.getName());
  
    /**
     * serialization version
     */
    private static final long serialVersionUID = -5719752001674467864L;
  
    /**
     * list for statistics to record time taken
     * by each phase of the query for example aggregation
     * scanning,block loading time etc.
     */
    private List<QueryStatistic> queryStatistics;
  
    /**
     * query id with task
     */
    private String queryId;
  
    public QueryStatisticsRecorderImpl(String queryId) {
      queryStatistics = new ArrayList<QueryStatistic>();
      this.queryId = queryId;
    }
  
    /**
     * Below method will be used to add the statistics
     *
     * @param statistic
     */
    public synchronized void recordStatistics(QueryStatistic statistic) {
      queryStatistics.add(statistic);
    }
  
    /**
     * Below method will be used to log the statistic
     */
    public void logStatistics() {
      for (QueryStatistic statistic : queryStatistics) {
        LOGGER.log(StatisticLevel.STATISTIC, statistic.getStatistics(queryId));
      }
    }
  
    /**
     * Below method will be used to show statistic log as table
     */
    public void logStatisticsForTask(TaskStatistics result) {
      if (null != result) {
        LOGGER.log(StatisticLevel.STATISTIC,
            "Print query statistic for each task id:" + "\n" + result.toString());
      }
    }
  
    public TaskStatistics statisticsForTask(long taskId, long startTime) {
      try {
        return new TaskStatistics(queryId, taskId).build(startTime, queryStatistics);
      } catch (Exception ex) {
        LOGGER.error(ex);
        return null;
      }
    }
  
    public void recordStatisticsForDriver(QueryStatistic statistic, String queryId) {
  
    }
  
    public void logStatisticsAsTableDriver() {
  
    }
  
  }
  