|  |  | 
 |  |  | import com.genersoft.iot.vmp.storager.IRedisCatchStorage; | 
 |  |  | import com.genersoft.iot.vmp.storager.IVideoManagerStorage; | 
 |  |  | import com.genersoft.iot.vmp.utils.DateUtil; | 
 |  |  | import gov.nist.javax.sip.message.SIPRequest; | 
 |  |  | import org.dom4j.Element; | 
 |  |  | import org.slf4j.Logger; | 
 |  |  | import org.slf4j.LoggerFactory; | 
 |  |  | 
 |  |  |         } | 
 |  |  |         // 回复200 OK | 
 |  |  |         try { | 
 |  |  |             responseAck(getServerTransaction(evt), Response.OK); | 
 |  |  |             responseAck((SIPRequest) evt.getRequest(), Response.OK); | 
 |  |  |         } catch (SipException | InvalidArgumentException | ParseException e) { | 
 |  |  |             logger.error("[命令发送失败] 国标级联 心跳回复: {}", e.getMessage()); | 
 |  |  |         } |