WSO2 ESBペイロードファクトリファクトリXML例外

Question

最近、ESBでAPIリソースを呼び出そうとすると、payloadFactoryによって実行されるXML例外（以下のスタックトレース）が発生します。 payloadFactory全体を削除することは、これを解決する唯一の方法と思われます。私はargs、空の書式、または完全に静的なargsとフォーマットは動作し、昨日働いた方法で持つことができません！

ビルドはESB 5.0.0上であり、そのようなリソースの例としては、次のようになります。

<resource methods="POST" uri-template="/someUrl"> 
    <inSequence> 
     <property name="acceptedRoles" value="RMD" scope="default" type="STRING/> 
     <property name="myProp" value="json-eval($)" scope="default" type="STRING"/> 
     <Package.ConnectorOne/> 
     <Package.ConnectorTwo/> 
     <loopback/> 
    </inSequence> 
    <outSequence> 
     <payloadFactory media-type="json"> 
      <format>{"statusCode":$1,"errorMessage":"$2","errors":$3}</format> 
      <args> 
       <arg evaluator="xml" expression="get-property('statusCode')/> 
       <arg evaluator="xml" expression="get-property('errorMessage')/> 
       <arg evaluator="xml" expression="get-property('errors')/> 
      </args> 
     <payloadFactory> 
     <send/> 
    </outSequence> 
    <faultSequence/> 
</resource> 

例外のスタックトレース：

TID[-1234] [ESB] [2017-03-21 19:22:33,024] ERROR 
{API_LOGGER.FleetManagement} - javax.xml.stream.XMLStreamException: 
Unexpected symbol: START_OBJECT 
org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:296) 
org.apache.axiom.om.impl.llom.OMElementImpl.buildNext(OMElementImpl.java:653 
) 
org.apache.axiom.om.impl.llom.OMSourcedElementImpl.buildNext(OMSourcedElemen 
tImpl.java:880) 
org.apache.axiom.om.impl.llom.OMNodeImpl.getNextOMSibling(OMNodeImpl.java:12 
2) 
org.apache.axiom.om.impl.llom.OMElementImpl.getNextOMSibling(OMElementImpl.j 
ava:343) 
org.apache.axiom.om.impl.traverse.OMChildrenIterator.getNextNode(OMChildrenI 
terator.java:36) 
org.apache.axiom.om.impl.traverse.OMAbstractIterator.hasNext(OMAbstractItera 
tor.java:58) 
org.apache.synapse.commons.json.JsonUtil.removeIndentations(JsonUtil.java:41 
8) 
org.apache.synapse.commons.json.JsonUtil.removeIndentations(JsonUtil.java:42 
5) 
org.apache.synapse.commons.json.JsonUtil.getNewJsonPayload(JsonUtil.java:587 
) 
org.apache.synapse.commons.json.JsonUtil.getNewJsonPayload(JsonUtil.java:654 
) 
org.apache.synapse.mediators.transform.PayloadFactoryMediator.mediate(Payloa 
dFactoryMediator.java:173) 
org.apache.synapse.mediators.transform.PayloadFactoryMediator.mediate(Payloa 
dFactoryMediator.java:104) 
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediat 
or.java:97) 
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediat 
or.java:59) 
org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator. 
java:158) org.apache.synapse.rest.Resource.process(Resource.java:343) 
org.apache.synapse.rest.API.process(API.java:338) 
org.apache.synapse.rest.RESTRequestHandler.apiProcess(RESTRequestHandler.jav 
a:123) 
org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler. 
java:101) 
org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:5 
6) 
org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2Syn 
apseEnvironment.java:304) 
org.apache.synapse.mediators.builtin.LoopBackMediator.mediate(LoopBackMediat 
or.java:63) 
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediat 
or.java:97) 
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediat 
or.java:59) 
org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator. 
java:158) org.apache.synapse.rest.Resource.process(Resource.java:343) 
org.apache.synapse.rest.API.process(API.java:399) 
org.apache.synapse.rest.RESTRequestHandler.apiProcess(RESTRequestHandler.jav 
a:123) 
org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler. 
java:101) 
org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:6 
9) 
org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2Syn 
apseEnvironment.java:304) 
org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageR 
eceiver.java:75) 
org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) 
org.apache.synapse.transport.passthru.ServerWorker.processNonEntityEnclosing 
RESTHandler(ServerWorker.java:325) 
org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingReq 
uest(ServerWorker.java:371) 
org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:151 
) 
org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerP 
ool.java:172) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
java.lang.Thread.run(Unknown Source) 

そして

javax.xml.stream.XMLStreamException: Unexpected symbol: START_OBJECT 
org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:296) 
org.apache.axiom.om.impl.llom.OMElementImpl.buildNext(OMElementImpl.java:653 
) 
org.apache.axiom.om.impl.llom.OMSourcedElementImpl.buildNext(OMSourcedElemen 
tImpl.java:880) 
org.apache.axiom.om.impl.llom.OMNodeImpl.getNextOMSibling(OMNodeImpl.java:12 
2) 
org.apache.axiom.om.impl.llom.OMElementImpl.getNextOMSibling(OMElementImpl.j 
ava:343) 
org.apache.axiom.om.impl.traverse.OMChildrenIterator.getNextNode(OMChildrenI 
terator.java:36) 
org.apache.axiom.om.impl.traverse.OMAbstractIterator.hasNext(OMAbstractItera 
tor.java:58) 
org.apache.synapse.commons.json.JsonUtil.removeIndentations(JsonUtil.java:41 
8) 
org.apache.synapse.commons.json.JsonUtil.removeIndentations(JsonUtil.java:42 
5) 
org.apache.synapse.commons.json.JsonUtil.getNewJsonPayload(JsonUtil.java:587 
) 
org.apache.synapse.commons.json.JsonUtil.getNewJsonPayload(JsonUtil.java:654 
) 
org.apache.synapse.mediators.transform.PayloadFactoryMediator.mediate(Payloa 
dFactoryMediator.java:173) 
org.apache.synapse.mediators.transform.PayloadFactoryMediator.mediate(Payloa 
dFactoryMediator.java:104) 
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediat 
or.java:97) 
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediat 
or.java:59) 
org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator. 
java:158) org.apache.synapse.rest.Resource.process(Resource.java:343) 
org.apache.synapse.rest.API.process(API.java:338) 
org.apache.synapse.rest.RESTRequestHandler.apiProcess(RESTRequestHandler.jav 
a:123) 
org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler. 
java:101) 
org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:5 
6) 
org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2Syn 
apseEnvironment.java:304) 
org.apache.synapse.mediators.builtin.LoopBackMediator.mediate(LoopBackMediat 
or.java:63) 
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediat 
or.java:97) 
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediat 
or.java:59) 
org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator. 
java:158) org.apache.synapse.rest.Resource.process(Resource.java:343) 
org.apache.synapse.rest.API.process(API.java:399) 
org.apache.synapse.rest.RESTRequestHandler.apiProcess(RESTRequestHandler.jav 
a:123) 
org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler. 
java:101) 
org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:6 
9) 
org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2Syn 
apseEnvironment.java:304) 
org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageR 
eceiver.java:75) 
org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) 
org.apache.synapse.transport.passthru.ServerWorker.processNonEntityEnclosing 
RESTHandler(ServerWorker.java:325) 
org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingReq 
uest(ServerWorker.java:371) 
org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:151 
) 
org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerP 
ool.java:172) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
java.lang.Thread.run(Unknown Source) 

Answer 1

I問題は、引数をjsonに渡している間に、ペイロードのファクトリメディエータの式の型であると推測してください。

*<payloadFactory media-type="json"> 
      <format>{"statusCode":$1,"errorMessage":"$2","errors":$3}</format> 
      <args> 
       <***arg evaluator="xml"*** expression="get-property('statusCode')/> 
       <arg evaluator="xml" expression="get-property('errorMessage')/> 
       <arg evaluator="xml" expression="get-property('errors')/> 
      </args> 
     <payloadFactory>* 

変化引数評価の値= "XML"表現= "取得-性XMLから（ 'からstatusCodeを'）= argの評価に" JSON "表現=" GET-プロパティ（ 'statusCode'）jsonと試してみてください。例外はxmlをjsonとして解析することによると信じています。

エラーが解決しなかった場合のコメント。 ありがとう

Answer 2

おそらく、jsonペイロードに注入しようとしている引数が、intまたはbooleanではないため、解析例外が発生する可能性があります。

これを試してみてください：

<payloadFactory media-type="json"> 
      <format>{"statusCode":"$1","errorMessage":"$2","errors": "$3"}</format> 
      <args> 
       <arg evaluator="xml" expression="get-property('statusCode')/> 
       <arg evaluator="xml" expression="get-property('errorMessage')/> 
       <arg evaluator="xml" expression="get-property('errors')/> 
      </args> 
<payloadFactory> 

が調停中に詳細に何が起こっているかを確認するには、DEBUGにシナプスロガー（org.apache.synapse）とワイヤログを設定してみてください。