Question

我正在尝试使用Esper CEP引擎并试图实现以下目标。

超过特定值时生成警报
调用外部API发布警报数据
将警报状态更改为“已确认”
创建一个事件以记录相同的事件

我正在使用以下代码：

insert into CreateAlarm
  select
    e.measurement.time as time,
    e.measurement.source.value as source,
    "com_cumulocity_LuxometerAlert" as type,
    "Lux value below optimum level" as text,
    "ACTIVE" as status,
    "MAJOR" as severity
  from MeasurementCreated e 
  where getNumber(e, "c8y_Luxometer.lux.value") >= 0 and 
    getNumber(e, "c8y_Luxometer.lux.value") <= 4.0 and 
    e.measurement.source.value='<device id>';    

insert into SendRequest 
  select 
    'post' as method,
    '<rest endpoint>' as url,
    aMap({"alarmID",e.alarm.id.value,"source",toJSON(findManagedObjectById(e.alarm.source.value))}) as headers,'application/json' as contentType,
    toJSON(e) as body 
  from pattern [every e = AlarmUpdated(
    alarm.status = CumulocityAlarmStatuses.ACTIVE, 
    alarm.severity=CumulocitySeverities.MAJOR, 
    alarm.type='com_cumulocity_LuxometerAlert')];    

insert into UpdateAlarm 
  select 
    f.alarm.id as id,
    "ACKNOWLEDGED" as status 
  from pattern [every f = AlarmUpdated(
    alarm.status = CumulocityAlarmStatuses.ACTIVE,
    alarm.severity=CumulocitySeverities.MAJOR,
    alarm.type='com_cumulocity_LuxometerAlert')];    

insert into CreateEvent
  select
    "c8y_DemoOrderCreate" as type,
    "Order Create Request To Vlocity" as text,
    g.alarm.time as time,
    g.alarm.source as source 
  from pattern [every g = AlarmUpdated(
    alarm.status=CumulocityAlarmStatuses.ACKNOWLEDGED,
    alarm.severity=CumulocitySeverities.MAJOR,
    alarm.type='com_cumulocity_LuxometerAlert')];

现在的问题是，当我的测量值落在所需值之内时，它正在创建警报和事件。但是我可以看到更少的API调用次数。理想情况下，警报和http呼叫的数量应该相同。但这不一样。

我的查询是，是CEP引擎将http请求发送给“ SendRequest”流，然后调用API。

HTTP“ SendRequest”流正在组合出站请求并调用REST端点

0 个答案: