content: /*
   * Copyright [2021-present] [ahoo wang <ahoowang@qq.com> (https://github.com/Ahoo-Wang)].
   * 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 me.ahoo.cosid.machine;
  
  import com.google.common.annotations.Beta;
  
  /**
   * MachineId Guarder .
   *
   * @author ahoo wang
   */
  @Beta
  public interface MachineIdGuarder {
      MachineIdGuarder NONE = new MachineIdGuarder.None();
      
      void register(String namespace, InstanceId instanceId);
      
      void unregister(String namespace, InstanceId instanceId);
      
      void start();
      
      void stop();
      
      boolean isRunning();
      
      class None implements MachineIdGuarder {
          
          @Override
          public void register(String namespace, InstanceId instanceId) {
          
          }
          
          @Override
          public void unregister(String namespace, InstanceId instanceId) {
          
          }
          
          @Override
          public void start() {
          
          }
          
          @Override
          public void stop() {
          
          }
          
          @Override
          public boolean isRunning() {
              return false;
          }
      }
  }
  