| package com.genersoft.iot.vmp.gb28181.transmit.event.request.impl.message.notify.cmd; | 
|   | 
| import com.genersoft.iot.vmp.common.VideoManagerConstants; | 
| import com.genersoft.iot.vmp.gb28181.bean.Device; | 
| import com.genersoft.iot.vmp.gb28181.bean.ParentPlatform; | 
| import com.genersoft.iot.vmp.gb28181.event.EventPublisher; | 
| import com.genersoft.iot.vmp.gb28181.transmit.event.request.SIPRequestProcessorParent; | 
| import com.genersoft.iot.vmp.gb28181.transmit.event.request.impl.message.IMessageHandler; | 
| import com.genersoft.iot.vmp.gb28181.transmit.event.request.impl.message.notify.NotifyMessageHandler; | 
| import org.dom4j.Element; | 
| import org.slf4j.Logger; | 
| import org.slf4j.LoggerFactory; | 
| import org.springframework.beans.factory.InitializingBean; | 
| import org.springframework.beans.factory.annotation.Autowired; | 
| import org.springframework.stereotype.Component; | 
|   | 
| import javax.sip.InvalidArgumentException; | 
| import javax.sip.RequestEvent; | 
| import javax.sip.SipException; | 
| import javax.sip.message.Response; | 
| import java.text.ParseException; | 
|   | 
| @Component | 
| public class KeepaliveNotifyMessageHandler extends SIPRequestProcessorParent implements InitializingBean, IMessageHandler { | 
|   | 
|     private Logger logger = LoggerFactory.getLogger(KeepaliveNotifyMessageHandler.class); | 
|     private final String cmdType = "Keepalive"; | 
|   | 
|     @Autowired | 
|     private NotifyMessageHandler notifyMessageHandler; | 
|   | 
|     @Autowired | 
|     private EventPublisher publisher; | 
|   | 
|     @Override | 
|     public void afterPropertiesSet() throws Exception { | 
|         notifyMessageHandler.addHandler(cmdType, this); | 
|     } | 
|   | 
|     @Override | 
|     public void handForDevice(RequestEvent evt, Device device, Element element) { | 
|         // 检查设备是否存在并在线, 不在线则设置为在线 | 
|         try { | 
|             if (device != null ) { | 
|                 // 回复200 OK | 
|                 responseAck(evt, Response.OK); | 
|                 publisher.onlineEventPublish(device, VideoManagerConstants.EVENT_ONLINE_KEEPLIVE); | 
|             } | 
|         } catch (SipException e) { | 
|             e.printStackTrace(); | 
|         } catch (InvalidArgumentException e) { | 
|             e.printStackTrace(); | 
|         } catch (ParseException e) { | 
|             e.printStackTrace(); | 
|         } | 
|     } | 
|   | 
|     @Override | 
|     public void handForPlatform(RequestEvent evt, ParentPlatform parentPlatform, Element element) { | 
|         // 不会收到上级平台的心跳信息 | 
|   | 
|     } | 
| } |