content: package com.genersoft.iot.vmp.media.event.hook;
  
  import com.genersoft.iot.vmp.media.event.media.*;
  import org.springframework.context.event.EventListener;
  import org.springframework.scheduling.annotation.Async;
  import org.springframework.scheduling.annotation.Scheduled;
  import org.springframework.stereotype.Component;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  /**
   * zlm hook事件的参数
   * @author lin
   */
  @Component
  public class HookSubscribe {
  
      /**
       * 订阅数据过期时间
       */
      private final long subscribeExpire = 5 * 60 * 1000;
  
  
      @FunctionalInterface
      public interface Event{
          void response(HookData data);
      }
  
      /**
       * 流到来的处理
       */
      @Async("taskExecutor")
      @EventListener
      public void onApplicationEvent(MediaArrivalEvent event) {
          if (event.getSchema() == null || "rtsp".equals(event.getSchema())) {
              sendNotify(HookType.on_media_arrival, event);
          }
  
      }
  
      /**
       * 流结束事件
       */
      @Async("taskExecutor")
      @EventListener
      public void onApplicationEvent(MediaDepartureEvent event) {
          if (event.getSchema() == null || "rtsp".equals(event.getSchema())) {
              sendNotify(HookType.on_media_departure, event);
          }
  
      }
      /**
       * 推流鉴权事件
       */
      @Async("taskExecutor")
      @EventListener
      public void onApplicationEvent(MediaPublishEvent event) {
          sendNotify(HookType.on_publish, event);
      }
      /**
       * 生成录像文件事件
       */
      @Async("taskExecutor")
      @EventListener
      public void onApplicationEvent(MediaRecordMp4Event event) {
          sendNotify(HookType.on_record_mp4, event);
      }
  
      private final Map<String, Event> allSubscribes = new ConcurrentHashMap<>();
      private final Map<String, Hook> allHook = new ConcurrentHashMap<>();
  
      private void sendNotify(HookType hookType, MediaEvent event) {
          Hook paramHook = Hook.getInstance(hookType, event.getApp(), event.getStream());
          Event hookSubscribeEvent = allSubscribes.get(paramHook.toString());
          if (hookSubscribeEvent != null) {
              HookData data = HookData.getInstance(event);
              hookSubscribeEvent.response(data);
          }
      }
  
      public void addSubscribe(Hook hook, HookSubscribe.Event event) {
          if (hook.getExpireTime() == null) {
              hook.setExpireTime(System.currentTimeMillis() + subscribeExpire);
          }
          allSubscribes.put(hook.toString(), event);
          allHook.put(hook.toString(), hook);
      }
  
      public void removeSubscribe(Hook hook) {
          allSubscribes.remove(hook.toString());
          allHook.remove(hook.toString());
      }
  
      /**
       * 对订阅数据进行过期清理
       */
      @Scheduled(fixedRate=subscribeExpire)   //每5分钟执行一次
      public void execute(){
          long expireTime = System.currentTimeMillis();
          for (Hook hook : allHook.values()) {
              if (hook.getExpireTime() < expireTime) {
                  allSubscribes.remove(hook.toString());
                  allHook.remove(hook.toString());
              }
          }
      }
  
      public List<Hook> getAll() {
          return new ArrayList<>(allHook.values());
      }
  }
  