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.csp.sentinel.dashboard.discovery;
  
  import java.util.List;
  import java.util.Set;
  
  public interface MachineDiscovery {
  
      String UNKNOWN_APP_NAME = "CLUSTER_NOT_STARTED";
  
      List<String> getAppNames();
  
      Set<AppInfo> getBriefApps();
  
      AppInfo getDetailApp(String app);
  
      /**
       * Remove the given app from the application registry.
       *
       * @param app application name
       * @since 1.5.0
       */
      void removeApp(String app);
  
      long addMachine(MachineInfo machineInfo);
  
      /**
       * Remove the given machine instance from the application registry.
       *
       * @param app the application name of the machine
       * @param ip machine IP
       * @param port machine port
       * @return true if removed, otherwise false
       * @since 1.5.0
       */
      boolean removeMachine(String app, String ip, int port);
  }