Fiware 质子CEP接收事件API NGSI/XML NullPointerException
我无法将NGSI/XML格式的事件发送到Proton CEP GE。用例是我需要Orion将事件发送到CEP Orion配置为向Proton发送正确接收的事件。然而,质子在收到它们时会报告Fiware 质子CEP接收事件API NGSI/XML NullPointerException,fiware,fiware-orion,Fiware,Fiware Orion,我无法将NGSI/XML格式的事件发送到Proton CEP GE。用例是我需要Orion将事件发送到CEP Orion配置为向Proton发送正确接收的事件。然而,质子在收到它们时会报告NullPointerException catalina.out的输出为: Nov 12, 2015 7:30:27 PM com.ibm.hrl.proton.webapp.providers.EventXmlNgsiMessageReader readFrom INFO: started event me
NullPointerException
catalina.out的输出为:
Nov 12, 2015 7:30:27 PM com.ibm.hrl.proton.webapp.providers.EventXmlNgsiMessageReader readFrom
INFO: started event message body reader
Nov 12, 2015 7:30:27 PM com.ibm.hrl.proton.webapp.providers.EventXmlNgsiMessageReader readFrom
INFO: Event: DeviceContextUpdate
Nov 12, 2015 7:30:27 PM com.ibm.hrl.proton.webapp.providers.EventXmlNgsiMessageReader readFrom
SEVERE: Could not parse XML NGSI event java.lang.NullPointerException, reason: null
last attribute name: null last value: null
Nov 12, 2015 7:30:27 PM com.ibm.hrl.proton.webapp.providers.EventXmlNgsiMessageReader readFrom
INFO: finished event message body reader
Nov 12, 2015 7:30:27 PM com.ibm.hrl.proton.webapp.resources.EventResource submitNewEvent
INFO: starting submitNewEvent
Nov 12, 2015 7:30:27 PM com.ibm.hrl.proton.webapp.resources.EventResource submitNewEvent
SEVERE: Could not send event, reason: java.lang.NullPointerException, message: null
将以下JSON事件直接发送到CEP works:
{"Name": "Device", "datacount5": "10", "lastupdate": "12/11/2015-17:09:08"}
INFO: starting submitNewEvent
Nov 12, 2015 7:31:39 PM com.ibm.hrl.proton.router.EventRouter routeTimedObject
INFO: routeTimedObject: forwarding event Device; EventId=32314f63-75d3-489f-9d8d-dbd0ba4a42b8; Chronon=null; DetectionTime=1447353099831; Name=Device; Certainty=0.0; Cost=0.0; lastupdate=1447344548000; EventSource=; OccurrenceTime=null; datacount5=10; Annotation=; Duration=0.0; ExpirationTime=null; to consumer...
Nov 12, 2015 7:31:39 PM com.ibm.hrl.proton.webapp.resources.EventResource submitNewEvent
INFO: events sent to proton runtime...
然而,在NGSI/XML中发送它会产生一个NullPointer异常,如上所述。发送的消息是:
<notifyContextRequest>
<subscriptionId>51a60c7a286043f73ce9606c</subscriptionId>
<originator>localhost</originator>
<contextResponseList>
<contextElementResponse>
<contextElement>
<entityId type="Device" isPattern="false">
<id>Device.imei2</id>
</entityId>
<contextAttributeList>
<contextAttribute>
<name>datacount5</name>
<contextValue>5</contextValue>
</contextAttribute>
</contextAttributeList>
</contextElement>
<statusCode>
<code>200</code>
<reasonPhrase>OK</reasonPhrase>
</statusCode>
</contextElementResponse>
</contextResponseList>
</notifyContextRequest>
注意:我还尝试发送在中找到的消息,得到了相同的NullPointerException,因此我知道这不是XML格式问题
接受JSON对象的phqp,但NGSI/XML失败的原因是什么 事实证明,使用JSON REST发送事件时,事件名称与XML/NGSI格式不同 使用JSON时,事件名称与JSON对象中描述的完全相同
{"Name": "Device", "datacount5": "10"}
所以,设备
在XML/NGSI的情况下,即使实体类型也设置为Device
,如下所示:
<entityId type="Device" isPattern="false">
<id>Device.imei2</id>
</entityId>
Device.imei2
事件名称转换为DeviceContextUpdate
此信息在中提供(隐藏?) 当NGSI/xml消息被CEP解析时,NGSI消息和CEP输入事件之间有一个转换过程 CEP中定义的匹配输入事件的名称必须为
ContextUpdate
,在您的案例中为DeviceContextUpdate
此输入事件必须具有以下属性:
- entityId–字符串类型。此属性保存消息中提供的entityId值
- entityType–字符串的类型。此属性保存消息中提供的实体类型
详情和示例可在Thank you@Tal Haham中找到,我15分钟前就发现了这一点。我希望他们在文件中更清楚地标记这一点。