我有以下流程,它接受来自 http 的 JSON 对象,然后将 JSON 对象转换为标准对象,然后对对象执行 CHOICE。
下面是流程:
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:tracking="http://www.mulesoft.org/schema/mule/ee/tracking" xmlns:json="http://www.mulesoft.org/schema/mule/json" version="EE-3.5.0" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:core="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns:spring="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/json http://www.mulesoft.org/schema/mule/json/current/mule-json.xsd
http://www.mulesoft.org/schema/mule/ee/tracking http://www.mulesoft.org/schema/mule/ee/tracking/current/mule-tracking-ee.xsd">
<json:object-to-json-transformer name="Object_to_JSON" doc:name="Object to JSON"/>
<flow doc:name="HelloWorldFlow1" name="HelloWorldFlow1">
<http:inbound-endpoint doc:description="This endpoint receives an HTTP message." doc:name="HTTP" exchange-pattern="request-response" host="localhost" port="8081" contentType="application/json"/>
<json:json-to-object-transformer doc:name="JSON to Object"/>
<choice doc:name="Choice-Determine-Route" tracking:enable-default-events="true">
<when expression="#[payload.uid == 'ABC']">
<set-payload value="#['When ABC case']" doc:name="Set Payload"/>
</when>
<otherwise>
<set-payload value="#['Default case, payload: ' + payload + ', payload.uid: ' + payload.uid]" doc:name="Set Payload"/>
</otherwise>
</choice>
</flow>
</mule>
下面是流量测试
C:\curl>type input2.txt
{ "uid" : "ABC" }
C:\curl>curl -H "Content-Type: application/json" -i -d @input2.txt http://localh
ost:8081
Content-Type: application/json
Default case, payload: {"uid":"ABC"}, payload.uid: null
所以即使我的 input2.txt 包含:
{ "uid" : "ABC" }
我无法成功触发以下表达式
#[payload.uid == 'ABC']
现在注意 Set Payload 表达式
#['Default case, payload: ' + payload + ', payload.uid: ' + payload.uid]
...以及它报告的内容:
Default case, payload: {"uid":"ABC"}, payload.uid: null
所以它似乎无法识别payload.uid
我应该如何在 MEL 中引用它?
谢谢