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.controller;
  
  import java.util.Random;
  import java.util.concurrent.TimeUnit;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.http.MediaType;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.ResponseBody;
  
  import com.alibaba.csp.sentinel.Entry;
  import com.alibaba.csp.sentinel.EntryType;
  import com.alibaba.csp.sentinel.SphU;
  import com.alibaba.csp.sentinel.context.ContextUtil;
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  
  @Controller
  @RequestMapping(value = "/demo", produces = MediaType.APPLICATION_JSON_VALUE)
  public class DemoController {
  
      Logger logger = LoggerFactory.getLogger(MachineRegistryController.class);
  
      @RequestMapping("/greeting")
      public String greeting() {
          return "index";
      }
  
      @RequestMapping("/link")
      @ResponseBody
      public String link() throws BlockException {
  
          Entry entry = SphU.entry("head1", EntryType.IN);
  
          Entry entry1 = SphU.entry("head2", EntryType.IN);
          Entry entry2 = SphU.entry("head3", EntryType.IN);
          Entry entry3 = SphU.entry("head4", EntryType.IN);
  
          entry3.exit();
          entry2.exit();
          entry1.exit();
          entry.exit();
          return "successfully create a call link";
      }
  
      @RequestMapping("/loop")
      @ResponseBody
      public String loop(String name, int time) throws BlockException {
          for (int i = 0; i < 10; i++) {
              Thread timer = new Thread(new RunTask(name, time, false));
              timer.setName("false");
              timer.start();
          }
          return "successfully create a loop thread";
      }
  
      @RequestMapping("/slow")
      @ResponseBody
      public String slow(String name, int time) throws BlockException {
          for (int i = 0; i < 10; i++) {
              Thread timer = new Thread(new RunTask(name, time, true));
              timer.setName("false");
              timer.start();
          }
          return "successfully create a loop thread";
      }
  
      static class RunTask implements Runnable {
          int time;
          boolean stop = false;
          String name;
          boolean slow = false;
  
          public RunTask(String name, int time, boolean slow) {
              super();
              this.time = time;
              this.name = name;
              this.slow = slow;
          }
  
          @Override
          public void run() {
              long startTime = System.currentTimeMillis();
              ContextUtil.enter(String.valueOf(startTime));
              while (!stop) {
  
                  long now = System.currentTimeMillis();
                  if (now - startTime > time * 1000) {
                      stop = true;
                  }
                  Entry e1 = null;
                  try {
                      e1 = SphU.entry(name);
  
                      if (slow == true) {
                          TimeUnit.MILLISECONDS.sleep(3000);
                      }
  
                  } catch (Exception e) {
                  } finally {
                      if (e1 != null) {
                          e1.exit();
                      }
                  }
                  Random random2 = new Random();
                  try {
                      TimeUnit.MILLISECONDS.sleep(random2.nextInt(200));
                  } catch (InterruptedException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  }
  
              }
              ContextUtil.exit();
          }
  
      }
  
  }
  