content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed 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.nacos.naming.consistency;
  
  import com.alibaba.nacos.naming.pojo.Record;
  
  import java.io.Serializable;
  import java.util.concurrent.atomic.AtomicLong;
  
  /**
   * Naming data.
   *
   * @author nacos
   */
  public class Datum<T extends Record> implements Serializable {
      
      private static final long serialVersionUID = -2525482315889753720L;
      
      public String key;
      
      public T value;
      
      public AtomicLong timestamp = new AtomicLong(0L);
      
      /**
       * Create datum.
       *
       * @param key   key of datum
       * @param value value of datum
       * @param <T>   Types of value
       * @return new datum
       */
      public static <T extends Record> Datum createDatum(final String key, final T value) {
          Datum datum = new Datum();
          datum.key = key;
          datum.value = value;
          return datum;
      }
  }
  