Question

我有一个简单的流程，我通过HTTP调用外部Web服务：

 <flow name="RFQStatusChangeFlow">
    <jms:inbound-endpoint queue="${RFQStatusQueue}" connector-ref="Web_logic_JMS" doc:name="JMS">
        <jms:transaction action="ALWAYS_BEGIN"/>
    </jms:inbound-endpoint>
    <set-variable variableName="originalMessage" value="#[payload]" doc:name="Variable"/> 
    <set-variable variableName="rfqnum" value="#[xpath3('/m:PublishRFQSTRUCT/m:RFQSTRUCTSet/m:RFQSTD/m:RFQNUM')]" doc:name="Variable"/>
    <expression-filter expression="#[xpath3('/m:PublishRFQSTRUCT/m:RFQSTRUCTSet/m:RFQSTD[(m:STATUS/@changed=1 and m:STATUS=(\'SENT\')) or (m:EOIREISSUE/@changed=1 and m:EOIREISSUE=1)]')!=empty]" doc:name="Expression"/>
    <mulexml:xslt-transformer maxIdleTransformers="2" maxActiveTransformers="5" doc:name="XSLT" xsl-file="rfq.xslt"/>
    <http:request config-ref="HTTP_Request_Configuration" path="${uploadTenderPath}" method="POST" doc:name="HTTP">
        <http:request-builder>
            <http:query-param paramName="Content-Type" value="text/xml; charset=utf-8"/>
            <http:header headerName="SOAPAction" value="${uploadTenderSOAPAction}"/>
        </http:request-builder>
    </http:request>
    <choice-exception-strategy doc:name="Choice Exception Strategy">
        <catch-exception-strategy doc:name="RFQ Catch Exception Strategy" when="#[message.inboundProperties['http.status']==500]">
            <logger level="ERROR" message="#[message.inboundProperties]" doc:name="Logger"/>    
            <set-payload value="#[['rfqnum':#[flowVars['rfqnum']], 'message':#[flowVars['originalMessage']], 'exceptions':#[exception]]]" doc:name="Set Payload"/>
            <jms:outbound-endpoint queue="${rfq.dead.letter}" connector-ref="Web_logic_JMS" doc:name="JMS">
                <jms:transaction action="ALWAYS_JOIN" />
            </jms:outbound-endpoint>
        </catch-exception-strategy>
        <rollback-exception-strategy doc:name="Rollback Exception Strategy"/>
    </choice-exception-strategy>
</flow>

我想要的是在将消息发送到死信队列之前，在catch异常策略中读取HTTP响应主体并将其设置为有效负载的一部分。
任何想法如何实现？
感谢

Answer 1

默认情况下，响应被传递给catch异常块。只需创建扩展AbstractMessageTransformer的java转换器并放在异常处理的开头。

    <catch-exception-strategy doc:name="Catch Exception Strategy">
        <custom-transformer class="com.class.YourTransformer" doc:name="Java"/>
    </catch-exception-strategy>

在变压器中只需做类似的事情：

        String response = message.getPayloadAsString();

然后将其与初始请求混合。您最好将初始请求保留在变量中，然后

@Override
public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException {

//Webservice response
 String response = message.getPayloadAsString();

//Initial request     
 message.getInvocationProperty("initialRequest");

//mix them both as you like

如何在catch异常策略中读取HTTP响应主体

1 个答案: