content: /*
   * Copyright 1999-2019 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.demo.transport.springmvc;
  
  import com.alibaba.csp.sentinel.Entry;
  import com.alibaba.csp.sentinel.SphU;
  import com.alibaba.csp.sentinel.init.InitExecutor;
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  import com.alibaba.csp.sentinel.slots.block.RuleConstant;
  import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
  import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager;
  import com.alibaba.csp.sentinel.transport.command.SentinelApiHandlerAdapter;
  import com.alibaba.csp.sentinel.transport.command.SentinelApiHandlerMapping;
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  import org.springframework.context.annotation.Bean;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.ResponseBody;
  
  import java.time.LocalDateTime;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * <p>Add the JVM parameter to connect to the dashboard:</p>
   * {@code -Dcsp.sentinel.dashboard.server=127.0.0.1:8080 -Dproject.name=sentinel-demo-transport-spring-mvc}
   *
   * <p>Add the JVM parameter to tell dashboard your application port:</p>
   * {@code -Dcsp.sentinel.api.port=10000}
   *
   * @author shenbaoyong
   */
  @SpringBootApplication
  @Controller
  public class TransportSpringMvcDemoApplication {
  
      public static void main(String[] args) {
          triggerSentinelInit();
          initFlowRules();
          SpringApplication.run(TransportSpringMvcDemoApplication.class);
      }
  
      public static void initFlowRules() {
          List<FlowRule> rules = new ArrayList<>();
          FlowRule rule = new FlowRule();
          rule.setResource("demo-hello-api");
          rule.setGrade(RuleConstant.FLOW_GRADE_QPS);
          rule.setCount(1);
          rules.add(rule);
          FlowRuleManager.loadRules(rules);
      }
  
      @GetMapping("/hello")
      @ResponseBody
      public String hello() {
          Entry entry = null;
          try {
              entry = SphU.entry("demo-hello-api");
              return "ok: " + LocalDateTime.now();
          } catch (BlockException e1) {
              return "helloBlockHandler: " + LocalDateTime.now();
          } finally {
              if (entry != null) {
                  entry.exit();
              }
          }
      }
  
      private static void triggerSentinelInit() {
          new Thread(() -> InitExecutor.doInit()).start();
      }
  
      @Bean
      public SentinelApiHandlerMapping sentinelApiHandlerMapping() {
          return new SentinelApiHandlerMapping();
      }
  
      @Bean
      public SentinelApiHandlerAdapter sentinelApiHandlerAdapter() {
          return new SentinelApiHandlerAdapter();
      }
  }
  