Mule从catchexception重新抛出异常

Question

如何从骡子的catch-exception-strategy重新抛出异常。

尝试使用下面的流程和来自“flowdemo”错误处理的异常之后，它不会执行错误处理mdemoflow。它会执行flow-ref之后的记录器。

<mule ....> 
    <sub-flow name="exceFlow"> 
     <logger level="ERROR" doc:name="Logger"/> 
     <expression-component doc:name="Expression"><![CDATA[throw new java.lang.IllegalArgumentException('bad arg');]]></expression-component> 
     <validation:is-true expression="false" doc:name="Validation"/> 
     <scripting:component doc:name="Script"> 
      <scripting:script engine="Groovy"><![CDATA[throw new java.lang.IllegalArgumentException('bad arg')]]></scripting:script> 
     </scripting:component> 
     <logger level="INFO" doc:name="Logger"/> 
    </sub-flow> 
    <flow name="flowdemo" processingStrategy="synchronous"> 
     <expression-component doc:name="Expression"><![CDATA[flowVars.dummy = flowVars.fake.test]]></expression-component> 
     <catch-exception-strategy doc:name="Catch Exception Strategy" > 
      <flow-ref name="exceFlow" doc:name="Flow Reference"/> 
     </catch-exception-strategy> 
    </flow> 
    <flow name="mdemoFlow" processingStrategy="synchronous"> 
     <poll doc:name="Poll"> 
      <fixed-frequency-scheduler frequency="3" timeUnit="MINUTES"/> 
      <logger level="INFO" doc:name="Logger"/> 
     </poll> 
     <flow-ref name="flowdemo" doc:name="flowdemo"/> 
     <logger level="INFO" doc:name="Logger"/> 
     <catch-exception-strategy doc:name="Catch Exception Strategy"> 
      <logger message="test logging in error" level="ERROR" doc:name="Logger"/> 
      <logger level="INFO" doc:name="Logger"/> 
     </catch-exception-strategy> 
    </flow> 
</mule> 

Answer 1

flowdemo它是流程（不是子流程），并有自己的catch异常Stratergy（所以它由演示流程本身处理）。线程从正在调用其他流的主流（mdemoFlow）开始通过flowRef，因此返回mainFlow以完成期望的线程（不考虑流处理策略）。如果你想处理主要流程中的所有异常。请使用下面的配置（将flowdemo设置为子流），因此默认情况下，其相关子流中发生的任何异常都将回到其主流来处理。

<sub-flow name="flowdemo" > 
    <expression-component doc:name="Expression"><![CDATA[flowVars.dummy = flowVars.fake.test]]></expression-component> 
</sub-flow> 
<flow name="mdemoFlow" processingStrategy="synchronous"> 
    <poll doc:name="Poll"> 
     <fixed-frequency-scheduler frequency="3" timeUnit="MINUTES"/> 
     <logger level="INFO" doc:name="Logger"/> 
    </poll> 
    <flow-ref name="flowdemo" doc:name="flowdemo"/> 
    <logger level="INFO" doc:name="Logger" message="***final logger***"/> 
    <catch-exception-strategy doc:name="Catch Exception Strategy"> 
     <logger message="test logging in error" level="ERROR" doc:name="Logger"/> 
     <logger level="INFO" doc:name="Logger"/> 
     <flow-ref name="exceFlow" doc:name="Flow Reference"/> 
    </catch-exception-strategy> 
</flow> 
<sub-flow name="exceFlow"> 
    <logger level="ERROR" doc:name="Logger"/> 
    <logger level="INFO" doc:name="Logger"/> 
</sub-flow> 

使异常策略成为全局。您可以使用全局异常策略，并通过引用异常策略调用相同的策略。请参考链接了解更多详情https://docs.mulesoft.com/mule-user-guide/v/3.7/reference-exception-strategy