Question

我遇到有效载荷问题。我跟着https://docs.wso2.com/display/ESB500/Exposing+Several+Services+as+a+Single+Service

但无法创建适当的有效负载

<log level="custom">
        <property expression="fn:concat('VIN: ',get-property('vin'),' ModelName: ',get-property('modelName'),' Year: ',get-property('modelYear'))" name="vechicle"/>
</log>

<payloadFactory description="VIN message" media-type="json">
  <format>{&#xd;
    "VIN":$1,&#xd;
    }</format>
  <args>
  <arg evaluator="xml" expression="$ctx:vin"/>
</args>
</payloadFactory>

get-property（'vin'）正在工作因为我在log BUT中看到有效负载没有用实际值替换$ 1，评估出错了

错误讯息：

Could not get parser from data source for element jsonObject
TID[-1234] [ESB] [2017-03-07 23:46:37,611] ERROR {org.apache.axiom.om.impl.llom.OMSourcedElementImpl} - Could not get parser from data source for element jsonObject org.apache.synapse.commons.staxon.core.base.AbstractXMLStreamReader.initialize(AbstractXMLStreamReader.java:245) org.apache.synapse.commons.staxon.core.json.JsonXMLStreamReader.(JsonXMLStreamReader.java:66) org.apache.synapse.commons.staxon.core.json.JsonXMLInputFactory.createXMLStreamReader(JsonXMLInputFactory.java:165) org.apache.synapse.commons.json.JsonUtil.getReader(JsonUtil.java:302) org.apache.synapse.commons.json.JsonDataSource.getReader(JsonDataSource.java:153) org.apache.axiom.om.impl.llom.OMSourcedElementImpl.getDirectReader(OMSourcedElementImpl.java:225) org.apache.axiom.om.impl.llom.OMSourcedElementImpl.forceExpand(OMSourcedElementImpl.java:254) org.apache.axiom.om.impl.llom.OMSourcedElementImpl.getFirstOMChild(OMSourcedElementImpl.java:867) org.apache.axiom.om.impl.OMNavigator._getFirstChild(OMNavigator.java:196) org.apache.axiom.om.impl.OMNavigator.updateNextNode(OMNavigator.java:140) org.apache.axiom.om.impl.OMNavigator.getNext(OMNavigator.java:112) org.apache.axiom.om.impl.SwitchingWrapper.updateNextNode(SwitchingWrapper.java:1113) org.apache.axiom.om.impl.SwitchingWrapper.(SwitchingWrapper.java:235) org.apache.axiom.om.impl.OMStAXWrapper.(OMStAXWrapper.java:74) org.apache.axiom.om.impl.llom.OMStAXWrapper.(OMStAXWrapper.java:52) org.apache.axiom.om.impl.llom.OMContainerHelper.getXMLStreamReader(OMContainerHelper.java:51) org.apache.axiom.om.impl.llom.OMElementImpl.getXMLStreamReader(OMElementImpl.java:736) org.apache.axiom.om.impl.llom.OMElementImpl.cloneOMElement(OMElementImpl.java:1038) org.apache.synapse.util.MessageHelper.cloneSOAPEnvelope(MessageHelper.java:690)

帮助...

Answer 1

问题似乎出现在JSON消息中。首先，JSON消息本身的格式化无关紧要，因此回车应该是过时的。然而，这似乎不是问题。其次，在$ 1之后有一个逗号，这表明会有另一个对象但是有一个回车然后是结束括号，这实际上是破解了解析器：我会这样尝试（尽管你可以留下回车，我已经在ESB 5.0.0上进行了测试）

<payloadFactory description="VIN message" media-type="json">
  <format>{
    "VIN":$1
    }</format>
  <args>
  <arg evaluator="xml" expression="$ctx:vin"/>
</args>
</payloadFactory>

此外，如果vin是一个字符串，那么您可能还需要添加格式的引号。

使用wso2中的json值填充有效内容

1 个答案: