content: /*
   * Copyright 1999-2022 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.core.service;
  
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.common.utils.LoggerUtils;
  import com.alibaba.nacos.common.utils.StringUtils;
  import com.alibaba.nacos.core.cluster.Member;
  import com.alibaba.nacos.api.common.NodeState;
  import com.alibaba.nacos.core.cluster.ServerMemberManager;
  import com.alibaba.nacos.core.model.request.LookupUpdateRequest;
  import com.alibaba.nacos.core.utils.Loggers;
  import org.springframework.stereotype.Service;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  
  /**
   * NacosClusterOperationService.
   * @author dongyafei
   * @date 2022/8/15
   */
  @Service
  public class NacosClusterOperationService {
      
      private final ServerMemberManager memberManager;
      
      public NacosClusterOperationService(ServerMemberManager memberManager) {
          this.memberManager = memberManager;
      }
      
      public Member self() {
          return memberManager.getSelf();
      }
      
      /**
       * The console displays the list of cluster members.
       */
      public Collection<Member> listNodes(String address, NodeState nodeState) throws NacosException {
          
          Collection<Member> members = memberManager.allMembers();
          Collection<Member> result = new ArrayList<>();
          
          for (Member member : members) {
              if (StringUtils.isNoneBlank(address) && !StringUtils.startsWith(member.getAddress(), address)) {
                  continue;
              }
              if (nodeState != null && member.getState() != nodeState) {
                  continue;
              }
              result.add(member);
          }
          return result;
      }
      
      /**
       * cluster members information update.
       */
      public Boolean updateNodes(List<Member> nodes) {
          for (Member node : nodes) {
              if (!node.check()) {
                  LoggerUtils.printIfWarnEnabled(Loggers.CLUSTER, "node information is illegal, ignore node: {}", node);
                  continue;
              }
              
              LoggerUtils.printIfDebugEnabled(Loggers.CLUSTER, "node state updating, node: {}", node);
              node.setState(NodeState.UP);
              node.setFailAccessCnt(0);
              
              boolean update = memberManager.update(node);
              if (!update) {
                  LoggerUtils.printIfErrorEnabled(Loggers.CLUSTER, "node state update failed, node: {}", node);
              }
          }
          return true;
      }
      
      /**
       * Addressing mode switch.
       */
      public Boolean updateLookup(LookupUpdateRequest request) throws NacosException {
          memberManager.switchLookup(request.getType());
          return true;
      }
      
      /**
       * query health of current node.
       */
      public String selfHealth() {
          return memberManager.getSelf().getState().name();
      }
  }
  