CEP http接收器可以一次接收多个数据节点吗? [英] Can CEP http receiver receive multi data nodes one time
问题描述
我使用ESB将XML消息转换为CEP http接收者XML:
I used ESB to transform the XML message to CEP http receiver, the XML:
<result>
<event>
<tag>0101A01B001</tag>
<time>10:00:01</time>
<value>30.45</value>
</event>
<event>
<tag>0101A01B001</tag>
<time>10:00:02</time>
<value>33.7</value>
</event>
<event>
<tag>0101A01B001</tag>
<time>10:00:03</time>
<value>23.4</value>
</event>
<event>
<tag>0101A01B001</tag>
<time>10:00:04</time>
<value>33.15</value>
</event>
</result>
还有CEP中的http接收器:
And the http receiver in CEP :
<?xml version="1.0" encoding="UTF-8"?>
<eventReceiver name="recv_dss1" statistics="disable" trace="enable" xmlns="http://wso2.org/carbon/eventreceiver">
<from eventAdapterType="http">
<property name="transports">all</property>
</from>
<mapping customMapping="enable" type="xml">
<property>
<from xpath="/result/data/tag"/>
<to name="tag" type="string"/>
</property>
<property>
<from xpath="/result/data/time"/>
<to name="time" type="long"/>
</property>
<property>
<from xpath="/result/data/value"/>
<to name="value" type="double"/>
</property>
</mapping>
<to streamName="dss_stream3" version="1.0.0"/>
</eventReceiver>
http接收器每次仅接收第一个事件"节点,因此如何配置接收器一次可以接收所有事件"节点?
The http receiver only receive the first "event" node every time, so how to config the receiver can receive all the "event" nodes one time ?
推荐答案
在配置中,您需要配置父选择器XPath表达式"以指示事件的父元素,在本例中为事件的父元素.
In the configuration you need to configure "Parent Selector XPath Expression" to indicate the parent element of the events, in this case its /result
.
然后应从父标记引用事件的元素,例如/data/time
Then elements of the event should be referred from the parent tag, e.g. /data/time
有关详细信息,请参阅WSO2 CEP 4.1 XML输入映射文档: https://docs.wso2.com/display/CEP410/Input+Mapping+Types#InputMappingTypes-XMLinputmappingXMLInputMapping
Refer to WSO2 CEP 4.1 XML input mapping documentation for details : https://docs.wso2.com/display/CEP410/Input+Mapping+Types#InputMappingTypes-XMLinputmappingXMLInputMapping
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