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我試圖生成並設置一個映射(帶有2個鍵值對),作爲以下HTTP調用的有效負載。但是,創建Map的MEL表達式不起作用。使用MEL將Mule流中的地圖設置爲有效載荷
<sub-flow name="call-myservice" doc:name="call-myservice">
<set-payload value="#[username :${my.username}, password : ${my.password}]" doc:name="Set Payload"/>
<https:outbound-endpoint exchange-pattern="request-response" host="${myservice.Host}" method="POST" mimeType="application/json" doc:name="My Service call" path="mypath" port="443"/>
</sub-flow>
我按照說明在http://www.mulesoft.org/documentation/display/current/Mule+Expression+Language+MEL
提示 -
MEL provides a streamlined way to access map data.
Rather than constructing a map with a new statement, and then using its put method to populate it, you can simply write the following:
[key1 : value1, key2 : value2, . . .]
但是,它給我下面的例外 -
ERROR 2014-02-28 15:27:51,424 [[services-proxy].connector.http.mule.default.receiver.02] org.mule.exception.DefaultMessagingExceptionStrategy:
********************************************************************************
Message : Execution of the expression "username :abc, password : pwd" failed. (org.mule.api.expression.ExpressionRuntimeException). Message payload is of type: String
Code : MULE_ERROR--2
--------------------------------------------------------------------------------
Exception stack is:
1. [Error: unresolvable property or identifier: username]
[Near : {... username :abc, pa ....}]
^
[Line: 1, Column: 1] (org.mvel2.PropertyAccessException)
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer:687 (null)
我想你也需要,如果你使用屬性佔位符來引用值:<設置荷載值=「#[‘用戶名’:‘$ {} my.username’,「密碼':'$ {my.password}']]「doc:name =」Set Payload「/>。 –
謝謝!安東你是對的,它只適用於我添加引號。 – user1493140