Mule には次のフローがあります。入力をテストし、入力文字列が「ctr1」に等しいかどうかを確認する選択フロー コントロールがあります。
<flow name="mediationFlow1" doc:name="mediationFlow1">
<file:inbound-endpoint path="C:\MuleStudio\SandBox\input" pollingFrequency="3000" responseTimeout="10000" doc:name="File"/>
<file:file-to-string-transformer doc:name="File to String"/>
<choice doc:name="Choice">
<when expression="payload=='ctr1'">
<cxf:jaxws-client operation="find" serviceClass="services.port.PortWS" port="portWSPort" enableMuleSoapHeaders="true" doc:name="Port"/>
<http:outbound-endpoint exchange-pattern="request-response" method="POST" address="http://localhost:8080/Actors/portWS" doc:name="portWS"/>
</when>
<otherwise >
<cxf:jaxws-client operation="find" serviceClass="services.douane.DouaneWS" port="douaneWSPort" enableMuleSoapHeaders="true" doc:name="Douane"/>
<http:outbound-endpoint exchange-pattern="request-response" method="POST" address="http://localhost:8080/Actors/douaneWS" doc:name="douaneWS"/>
</otherwise>
</choice>
<file:outbound-endpoint path="C:\MuleStudio\SandBox\output" outputPattern="#[function:datestamp:dd-MM-yy]_#[function:systime].xml " responseTimeout="10000" doc:name="Outgoing File"/>
</flow>
</mule>
両方の Web サービス呼び出しは、それらを個別に実行すると完全に機能しますが、選択肢 ccontrol を追加すると、次のようになります。
INFO 2013-05-14 15:48:07,892 [[mediation].connector.file.mule.default.receiver.01] org.mule.transport.file.FileMessageReceiver: Lock obtained on file: C:\MuleStudio\SandBox\input\input.txt
INFO 2013-05-14 15:48:08,206 [[mediation].mediationFlow1.stage1.02] org.mule.transport.service.DefaultTransportServiceDescriptor: Loading default outbound transformer: org.mule.transport.http.transformers.ObjectToHttpClientMethodRequest
INFO 2013-05-14 15:48:08,216 [[mediation].mediationFlow1.stage1.02] org.mule.transport.service.DefaultTransportServiceDescriptor: Loading default response transformer: org.mule.transport.http.transformers.MuleMessageToHttpResponse
INFO 2013-05-14 15:48:08,253 [[mediation].mediationFlow1.stage1.02] org.mule.transport.service.DefaultTransportServiceDescriptor: Loading default outbound transformer: org.mule.transport.http.transformers.ObjectToHttpClientMethodRequest
INFO 2013-05-14 15:48:08,254 [[mediation].mediationFlow1.stage1.02] org.mule.lifecycle.AbstractLifecycleManager: Initialising: 'connector.http.mule.default.dispatcher.7073225'. Object is: HttpClientMessageDispatcher
INFO 2013-05-14 15:48:08,260 [[mediation].mediationFlow1.stage1.02] org.mule.lifecycle.AbstractLifecycleManager: Starting: 'connector.http.mule.default.dispatcher.7073225'. Object is: HttpClientMessageDispatcher
INFO 2013-05-14 15:48:09,035 [[mediation].connector.file.mule.default.dispatcher.01] org.mule.lifecycle.AbstractLifecycleManager: Initialising: 'connector.file.mule.default.dispatcher.23051110'. Object is: FileMessageDispatcher
INFO 2013-05-14 15:48:09,035 [[mediation].connector.file.mule.default.dispatcher.01] org.mule.lifecycle.AbstractLifecycleManager: Starting: 'connector.file.mule.default.dispatcher.23051110'. Object is: FileMessageDispatcher
INFO 2013-05-14 15:48:09,040 [[mediation].connector.file.mule.default.dispatcher.01] org.mule.transport.file.FileConnector: Writing file to: C:\MuleStudio\SandBox\output\14-05-13_1368539289037.xml
INFO 2013-05-14 15:48:09,043 [[mediation].connector.file.mule.default.dispatcher.01] org.mule.module.xml.transformer.jaxb.JAXBContextResolver: No common Object of type 'class javax.xml.bind.JAXBContext' configured, creating a local one for: SimpleDataType{type=services.port.Port, mimeType='text/xml'}, SimpleDataType{type=java.io.InputStream, mimeType='*/*'}
ERROR 2013-05-14 15:48:09,058 [[mediation].connector.file.mule.default.dispatcher.01] org.mule.exception.DefaultMessagingExceptionStrategy:
********************************************************************************
Message : An invalid return type "class java.io.InputStream" was specified for transformer "JAXBMarshallerTransformer"
Code : MULE_ERROR-266
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Exception stack is:
1. An invalid return type "class java.io.InputStream" was specified for transformer "JAXBMarshallerTransformer" (org.mule.api.transformer.TransformerException)
org.mule.module.xml.transformer.jaxb.JAXBMarshallerTransformer:122 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/api/transformer/TransformerException.html)
--------------------------------------------------------------------------------
Root Exception stack trace:
org.mule.api.transformer.TransformerException: An invalid return type "class java.io.InputStream" was specified for transformer "JAXBMarshallerTransformer"
at org.mule.module.xml.transformer.jaxb.JAXBMarshallerTransformer.doTransform(JAXBMarshallerTransformer.java:122)
at org.mule.transformer.AbstractTransformer.transform(AbstractTransformer.java:411)
at org.mule.DefaultMuleMessage.getPayload(DefaultMuleMessage.java:362)
+ 3 more (set debug level logging or '-Dmule.verbose.exceptions=true' for everything)
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それが選択テスト式から来ているかどうかはわかりませんか？ただし、選択制御フローの詳細な使用方法に関する多くの情報を見つけることはできません。
あなたの助けに感謝。ありがとうございました。