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.naming.controllers.v2;
  
  import com.alibaba.nacos.api.common.Constants;
  import com.alibaba.nacos.api.model.v2.Result;
  import com.alibaba.nacos.api.naming.pojo.Instance;
  import com.alibaba.nacos.api.naming.utils.NamingUtils;
  import com.alibaba.nacos.auth.annotation.Secured;
  import com.alibaba.nacos.common.utils.JacksonUtils;
  import com.alibaba.nacos.core.controller.compatibility.Compatibility;
  import com.alibaba.nacos.core.paramcheck.ExtractorManager;
  import com.alibaba.nacos.naming.core.CatalogServiceV2Impl;
  import com.alibaba.nacos.naming.misc.UtilsAndCommons;
  import com.alibaba.nacos.naming.paramcheck.NamingDefaultHttpParamExtractor;
  import com.alibaba.nacos.plugin.auth.constant.ActionTypes;
  import com.alibaba.nacos.plugin.auth.constant.ApiType;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.RestController;
  
  import java.util.List;
  import java.util.stream.Collectors;
  import java.util.stream.Stream;
  
  /**
   * CatalogControllerV2.
   *
   * @author Weizhan▪Yun
   * @date 2023/1/14 19:54
   */
  @Deprecated
  @RestController
  @RequestMapping(UtilsAndCommons.DEFAULT_NACOS_NAMING_CONTEXT_V2 + UtilsAndCommons.NACOS_NAMING_CATALOG_CONTEXT)
  @ExtractorManager.Extractor(httpExtractor = NamingDefaultHttpParamExtractor.class)
  public class CatalogControllerV2 {
      
      @Autowired
      private CatalogServiceV2Impl catalogServiceV2;
      
      /**
       * List instances of special service.
       *
       * @param namespaceId namespace id
       * @param serviceName service name
       * @param healthyOnly instance health only
       * @param enabledOnly instance enabled
       * @param page        number of page
       * @param pageSize    size of each page
       * @return instances information
       */
      @Secured(action = ActionTypes.READ)
      @RequestMapping(value = "/instances")
      @Compatibility(apiType = ApiType.CONSOLE_API, alternatives = "GET ${contextPath:nacos}/v3/console/ns/instance/list")
      public Result<ObjectNode> instanceList(
              @RequestParam(defaultValue = Constants.DEFAULT_NAMESPACE_ID) String namespaceId,
              @RequestParam String serviceName, @RequestParam(required = false) Boolean healthyOnly,
              @RequestParam(required = false) Boolean enabledOnly, @RequestParam(name = "pageNo") int page,
              @RequestParam int pageSize) {
          String serviceNameWithoutGroup = NamingUtils.getServiceName(serviceName);
          String groupName = NamingUtils.getGroupName(serviceName);
          List<? extends Instance> instances = catalogServiceV2.listAllInstances(namespaceId, groupName,
                  serviceNameWithoutGroup);
          int start = (page - 1) * pageSize;
          
          if (start < 0) {
              start = 0;
          }
          int end = start + pageSize;
          
          if (start > instances.size()) {
              start = instances.size();
          }
          
          if (end > instances.size()) {
              end = instances.size();
          }
          
          Stream<? extends Instance> stream = instances.stream();
          if (healthyOnly != null) {
              stream = stream.filter(instance -> instance.isHealthy() == healthyOnly);
          }
          if (enabledOnly != null) {
              stream = stream.filter(i -> i.isEnabled() == enabledOnly);
          }
          List<? extends Instance> ins = stream.collect(Collectors.toList());
          
          ObjectNode result = JacksonUtils.createEmptyJsonNode();
          if (ins.size() > start) {
              result.replace("instances", JacksonUtils.transferToJsonNode(ins.subList(start, end)));
          }
          result.put("count", ins.size());
          
          return Result.success(result);
      }
  }
  