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[英]Mule: sending an input stream payload (from file) along with file metadata to http outbound endpoint
[英]Mule Enrichment: enrich xml payload with http endpoint response
我是m子的新手,正在研究POC。 我想通過調用返回xml作為響應(source.xml)的http端點來豐富有效負載(target.xml)。
<flow name="mule-configFlow" doc:name="mule-configFlow">
<jms:inbound-endpoint doc:name="JMS" connector-ref="Active_MQ" queue="QUEUE1"/>
<logger message="#[message.payload]" level="INFO" doc:name="Logger"/>
<enricher doc:name="Message Enricher" target="#[xpath:Customer/OfficeId]">
<http:outbound-endpoint exchange-pattern="request-response" host="localhost" port="8095" path="myservice/v1/" method="GET" doc:name="HTTP">
<expression-transformer evaluator="xpath" expression="Response/OffId" />
</http:outbound-endpoint>
</enricher>
<jms:outbound-endpoint queue="QUEUE2" connector-ref="Active_MQ" doc:name="JMS"/>
</flow>
我已經驗證並且http終結點可以正常工作,但是出現以下錯誤
Expression Evaluator "xpath" with expression "Response/OffId" returned null but a value was required
我是否正確配置了源表達式和目標表達式?
傳入消息有效負載(target.xml):
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Customer xmlns="http://www.xyz.com/abc/v1">
<ActionType>ACCOUNT_ADDED</ActionType>
<OfficeId></OfficeId>
<MemberId></MemberId>
</Customer>
豐富源(source.xml):
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Response xmlns="http://www.xyz.com/abc/v1">
<OffId></OffId>
<MemId></MemId>
</Response>
這里有幾個問題:
為此,請將出站端點和表達式傳輸器放入流程鏈中,使用處理名稱空間或忽略名稱空間的xpath表達式,並將初始xml字符串有效負載轉換為其他內容,例如DOM,您可以對其進行操作。
這樣的事情應該起作用:
<mulexml:xml-to-dom-transformer returnClass="org.dom4j.Document"/>
<enricher source="#[payload]" target="#[payload.rootElement.element('OfficeId').text]">
<processor-chain>
<http:outbound-endpoint exchange-pattern="request-response" host="localhost" port="8095" path="myservice/v1/" method="GET"/>
<expression-transformer evaluator="xpath" expression="//*[local-name()='OffId']" />
</processor-chain>
</enricher>
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