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 com.alibaba.metrics.server;
  
  import com.alibaba.metrics.MetricLevel;
  import com.alibaba.metrics.bean.MetricResult;
  import com.alibaba.metrics.bean.ValueStatus;
  import com.alibaba.metrics.common.config.MetricsCollectPeriodConfig;
  import com.alibaba.metrics.reporter.bin.DataSource;
  import com.alibaba.metrics.utils.Constants;
  import com.alibaba.metrics.utils.FigureUtil;
  
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Set;
  
  import static com.alibaba.metrics.utils.Constants.LONG_LENGTH;
  
  public abstract class MetricsDataStore {
  
      private MetricsCollectPeriodConfig metricsCollectPeriodConfig = new MetricsCollectPeriodConfig();
  
      List<MetricResult> createMetricsResult(Set<DataSource> dataSources, long[] dataArray, long timestamp, MetricLevel level, int precision, List<MetricResult> resultList){
  
          for (DataSource dataSource : dataSources) {
  
              long addTime = dataSource.getAddTime();
  
              if (timestamp < addTime){
                  continue;
              }
  
              if (resultList == null){
                  resultList = new LinkedList<MetricResult>();
              }
  
              MetricResult metricResult = new MetricResult(dataSource.getMetricName(), dataSource.getTags(), ValueStatus.NAN,
                      null, timestamp, metricsCollectPeriodConfig.period(level), dataSource.getMetricType(), dataSource.getMeterName());
  
              //判断这个metrics的统计精度是否符合要求
              if (metricsCollectPeriodConfig.period(dataSource.getLevel()) > precision){
                  metricResult.setValueStatus(ValueStatus.INVALID_PRECISION);
                  resultList.add(metricResult);
                  continue;
              }
  
              int offset = (int) dataSource.getOffset();
              if (offset > dataArray.length * LONG_LENGTH){
                  continue;
              }
  
              int order = dataSource.getOrder();
  
              long value = dataArray[order];
              int fieldType = dataSource.getFieldType();
  
              Object o = FigureUtil.getValueByType(fieldType, value);
  
              ValueStatus valueStatus;
              if (value == Constants.VALUE_STATUS_NAN) {
                  valueStatus = ValueStatus.NAN;
                  o = 0;
              } else {
                  valueStatus = ValueStatus.EXIST;
              }
  
              metricResult.setValue(o);
              metricResult.setValueStatus(valueStatus);
  
              resultList.add(metricResult);
  
          }
  
          return resultList;
      }
  
  }
  