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.topn;
  
  import lombok.Getter;
  import lombok.Setter;
  import org.apache.skywalking.oap.server.core.analysis.record.Record;
  import org.apache.skywalking.oap.server.core.storage.ComparableStorageData;
  import org.apache.skywalking.oap.server.core.storage.annotation.BanyanDB;
  import org.apache.skywalking.oap.server.core.storage.annotation.Column;
  
  /**
   * TopN data.
   */
  public abstract class TopN extends Record implements ComparableStorageData {
      public static final String STATEMENT = "statement";
      public static final String LATENCY = "latency";
      public static final String TRACE_ID = "trace_id";
      public static final String ENTITY_ID = "entity_id";
      public static final String TIMESTAMP = "timestamp";
      
      @Getter
      @Setter
      @Column(name = LATENCY, dataType = Column.ValueDataType.SAMPLED_RECORD)
      @BanyanDB.IndexRule(indexType = BanyanDB.IndexRule.IndexType.TREE)
      private long latency;
      @Getter
      @Setter
      @Column(name = TRACE_ID, storageOnly = true)
      private String traceId;
      @Getter
      @Setter
      @Column(name = ENTITY_ID, length = 512)
      @BanyanDB.SeriesID(index = 0)
      private String entityId;
      @Getter
      @Setter
      @Column(name = TIMESTAMP)
      private long timestamp;
  
      @Override
      public int compareTo(Object o) {
          TopN target = (TopN) o;
          return (int) (latency - target.latency);
      }
  }
  