|  |  | 
 |  |  | import com.genersoft.iot.vmp.gb28181.transmit.event.request.impl.message.IMessageHandler; | 
 |  |  | import com.genersoft.iot.vmp.gb28181.transmit.event.request.impl.message.response.ResponseMessageHandler; | 
 |  |  | import com.genersoft.iot.vmp.gb28181.utils.XmlUtil; | 
 |  |  | import gov.nist.javax.sip.message.SIPRequest; | 
 |  |  | import org.dom4j.Element; | 
 |  |  | import org.slf4j.Logger; | 
 |  |  | import org.slf4j.LoggerFactory; | 
 |  |  | 
 |  |  |         String key = DeferredResultHolder.CALLBACK_CMD_CONFIGDOWNLOAD + device.getDeviceId() + channelId; | 
 |  |  |         try { | 
 |  |  |             // 回复200 OK | 
 |  |  |             responseAck(getServerTransaction(evt), Response.OK); | 
 |  |  |             responseAck((SIPRequest) evt.getRequest(), Response.OK); | 
 |  |  |         } catch (SipException | InvalidArgumentException | ParseException e) { | 
 |  |  |             logger.error("[命令发送失败] 设备配置查询: {}", e.getMessage()); | 
 |  |  |         } |