Question

我正在使用CEP以更新模式修改类型日期字段。

实体：

{
  "id":"controller",
  "type":"control",
  "lasmodify":{
    "type":"DataTime",
    "value":""
    }
 }

{
   "id":"Device01",
   "type":"device",
   "id_controller":{
      "type":"Text",
      "value":"controller01"
    }
   "datemodify":{
   "type":"DataTime",
   "value":"2018-12-04T20:05:00.00Z"
   }
 }

我希望拍摄Device01订阅，将使用device01实体的datemodify修改controller01属性lasmodify。

非常感谢您最好的问候。

Answer 1

如果我已正确理解，您想在CEP收到设备更改通知时更新控制器。解决方案应类似于以下规则：

{
   "name":"update_rule",
   "text":"select ev.controler? as controlerID, ev.datemodify? as newDate, \"update_rule\" as ruleName from pattern [every ev=iotEvent(type=\"device\")]",
   "action":{
      "type":"update",
      "parameters":{
          "id":"${controlerID}",
          "type":"control",
          "attributes": [
                {
                "name":"lasmodify",
                "type":"DataTime"
                "value":"${newDate}"
                }
          ]
      }
   }
}

我不知道您使用的是哪个版本的Perseo，但是如果使用perseo-fe和perseo-core的最新软件映像，则可以省略ruleName并使用NGSIv2

{
   "name":"update_rule",
   "text":"select ev.controler? as controlerID, ev.datemodify? as newDate from pattern [every ev=iotEvent(type=\"device\")]",
   "action":{
      "type":"update",
      "parameters":{
          "id":"${controlerID}",
          "type":"control",
          "version": "2",
          "attributes": [
                {
                "name":"lasmodify",
                "type":"DataTime"
                "value":"${newDate}"
                }
          ]
      }
   }
}

Perseo CEP中的DataTime

1 个答案: