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.bifromq.plugin.eventcollector;
  
  import lombok.SneakyThrows;
  import lombok.ToString;
  
  @ToString
  public abstract class Event<T extends Event<T>> implements Cloneable {
      private long hlc;
  
      public abstract EventType type();
  
      /**
       * The UTC timestamp of the event in milliseconds
       *
       * @return the timestamp
       */
      public long utc() {
          return hlc >>> 16;
      }
  
      /**
       * The timestamp from Hybrid Logical Clock, which is usually used for causal reasoning
       *
       * @return the hlc timestamp
       */
      public long hlc() {
          return hlc;
      }
  
      void hlc(long hlc) {
          this.hlc = hlc;
      }
  
      @SneakyThrows
      @Override
      public Object clone() {
          return super.clone();
      }
  
      public void clone(T orig) {
          this.hlc = orig.hlc();
      }
  }
  