package com.genersoft.iot.vmp.gb28181.event.online;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.context.ApplicationListener;
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import org.springframework.stereotype.Component;
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import com.genersoft.iot.vmp.common.VideoManagerConstants;
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import com.genersoft.iot.vmp.storager.IVideoManagerStorager;
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import com.genersoft.iot.vmp.utils.redis.RedisUtil;
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/**
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* @Description: 在线事件监听器，监听到离线后，修改设备离在线状态。 设备在线有两个来源：
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* 1、设备主动注销，发送注销指令，{@link com.genersoft.iot.vmp.gb28181.transmit.request.impl.RegisterRequestProcessor}
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* 2、设备未知原因离线，心跳超时,{@link com.genersoft.iot.vmp.gb28181.transmit.request.impl.MessageRequestProcessor}
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* @author: songww
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* @date: 2020年5月6日 下午1:51:23
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*/
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@Component
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public class OnlineEventListener implements ApplicationListener<OnlineEvent> {
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private final static Logger logger = LoggerFactory.getLogger(OnlineEventListener.class);
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@Autowired
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private IVideoManagerStorager storager;
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@Autowired
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private RedisUtil redis;
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@Override
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public void onApplicationEvent(OnlineEvent event) {
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if (logger.isDebugEnabled()) {
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logger.debug("设备离线事件触发，deviceId：" + event.getDeviceId() + ",from:" + event.getFrom());
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}
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String key = VideoManagerConstants.KEEPLIVEKEY_PREFIX + event.getDeviceId();
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boolean needUpdateStorager = false;
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switch (event.getFrom()) {
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// 注册时触发的在线事件，先在redis中增加超时超时监听
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case VideoManagerConstants.EVENT_ONLINE_REGISTER:
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// TODO 超时时间暂时写死为180秒
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redis.set(key, event.getDeviceId(), 180);
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needUpdateStorager = true;
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break;
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// 设备主动发送心跳触发的离线事件
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case VideoManagerConstants.EVENT_ONLINE_KEEPLIVE:
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boolean exist = redis.hasKey(key);
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// 先判断是否还存在，当设备先心跳超时后又发送心跳时，redis没有监听，需要增加
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if (!exist) {
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needUpdateStorager = true;
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redis.set(key, event.getDeviceId(), 180);
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} else {
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redis.expire(key, 180);
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}
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break;
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}
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if (needUpdateStorager) {
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// 处理离线监听
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storager.online(event.getDeviceId());
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}
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}
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}
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