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.cluster.server.command.handler;
  
  import java.net.URLDecoder;
  import java.util.List;
  
  import com.alibaba.csp.sentinel.cluster.flow.rule.ClusterFlowRuleManager;
  import com.alibaba.csp.sentinel.command.CommandHandler;
  import com.alibaba.csp.sentinel.command.CommandRequest;
  import com.alibaba.csp.sentinel.command.CommandResponse;
  import com.alibaba.csp.sentinel.command.annotation.CommandMapping;
  import com.alibaba.csp.sentinel.log.RecordLog;
  import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
  import com.alibaba.csp.sentinel.util.StringUtil;
  import com.alibaba.fastjson.JSONArray;
  
  /**
   * @author Eric Zhao
   * @since 1.4.0
   */
  @CommandMapping(name = "cluster/server/modifyFlowRules", desc = "modify cluster flow rules")
  public class ModifyClusterFlowRulesCommandHandler implements CommandHandler<String> {
  
      @Override
      public CommandResponse<String> handle(CommandRequest request) {
          String namespace = request.getParam("namespace");
          if (StringUtil.isEmpty(namespace)) {
              return CommandResponse.ofFailure(new IllegalArgumentException("empty namespace"));
          }
          String data = request.getParam("data");
          if (StringUtil.isBlank(data)) {
              return CommandResponse.ofFailure(new IllegalArgumentException("empty data"));
          }
          try {
              data = URLDecoder.decode(data, "UTF-8");
              RecordLog.info("[ModifyClusterFlowRulesCommandHandler] Receiving cluster flow rules for namespace <{}>: {}", namespace, data);
  
              List<FlowRule> flowRules = JSONArray.parseArray(data, FlowRule.class);
              ClusterFlowRuleManager.loadRules(namespace, flowRules);
  
              return CommandResponse.ofSuccess(SUCCESS);
          } catch (Exception e) {
              RecordLog.warn("[ModifyClusterFlowRulesCommandHandler] Decode cluster flow rules error", e);
              return CommandResponse.ofFailure(e, "decode cluster flow rules error");
          }
      }
  
      private static final String SUCCESS = "success";
  }
  