code: /*
   * 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.skywalking.oap.server.core.analysis.metrics;
  
  import lombok.Getter;
  import lombok.Setter;
  import org.apache.skywalking.oap.server.core.analysis.ConfigurationDictionary;
  import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.Arg;
  import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.Entrance;
  import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.MetricsFunction;
  import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.SourceFrom;
  import org.apache.skywalking.oap.server.core.query.sql.Function;
  import org.apache.skywalking.oap.server.core.storage.annotation.BanyanDB;
  import org.apache.skywalking.oap.server.core.storage.annotation.Column;
  import org.apache.skywalking.oap.server.core.storage.annotation.ElasticSearch;
  
  /**
   * Apdex dissatisfaction levels of Tolerating (apdex_t) and Frustrated (apdex_f) indicate how slow site performance
   * contributes to poor customer experiences in your app. For example:
   * <p>
   * 10000: All responses are satisfactory. Tolerating responses half satisfy a user. For example, if all responses are
   * Tolerating, then the Apdex value will be 5000. 0: None of the responses are satisfactory.
   */
  @MetricsFunction(functionName = "apdex")
  public abstract class ApdexMetrics extends Metrics implements IntValueHolder {
      @Setter
      private static ConfigurationDictionary DICT;
      protected static final String TOTAL_NUM = "total_num";
      // Level: satisfied
      protected static final String S_NUM = "s_num";
      // Level: tolerated
      protected static final String T_NUM = "t_num";
      protected static final String VALUE = "int_value";
  
      @Getter
      @Setter
      @Column(name = TOTAL_NUM, storageOnly = true)
      @BanyanDB.MeasureField
      private long totalNum;
      @Getter
      @Setter
      @Column(name = S_NUM, storageOnly = true)
      @BanyanDB.MeasureField
      private long sNum;
      @Getter
      @Setter
      @Column(name = T_NUM, storageOnly = true)
      @BanyanDB.MeasureField
      private long tNum;
      @Getter
      @Setter
      @Column(name = VALUE, dataType = Column.ValueDataType.COMMON_VALUE, function = Function.Avg)
      @ElasticSearch.Column(legacyName = "value")
      @BanyanDB.MeasureField
      private int value;
  
      @Entrance
      public final void combine(@SourceFrom int value, @Arg String name, @Arg boolean status) {
          int t = DICT.lookup(name).intValue();
          int t4 = t * 4;
          totalNum++;
          if (!status || value > t4) {
              return;
          }
          if (value > t) {
              tNum++;
          } else {
              sNum++;
          }
      }
  
      @Override
      public final boolean combine(Metrics metrics) {
          tNum += ((ApdexMetrics) metrics).tNum;
          sNum += ((ApdexMetrics) metrics).sNum;
          totalNum += ((ApdexMetrics) metrics).totalNum;
          return true;
      }
  
      @Override
      public void calculate() {
          value = (int) ((sNum * 10000 + tNum * 10000 / 2) / totalNum);
      }
  
      @Override
      public int getValue() {
          return value;
      }
  }
  