Mule DataWeave

Mule DataWeave:

 

This Example explains about handling Multiple Input (JSON,XML) data using DataWeave component.

Pre-requisites

1. Anypoint Studio 5.2.0
2. ESB Runtime 3.7.1
3. JSON Input Data

 Mule Flow 

http configuration 

 

 flowVariable_JSON 

 

flowVariable_XML 

DataWeave Logic

Invoke the flow with http://localhost:8081/multi and send the body data (JSON input) using POST method.

Flow Request 

[ { "item": { "type": "book", "price": 30, "properties": { "title": "Everyday Italian", "author": [ "Giada De Laurentiis" ], "year": 2005 } } }, { "item": { "type": "book", "price": 29.99, "properties": { "title": "Harry Potter", "author": [ "J K. Rowling" ], "year": 2005 } } }, { "item": { "type": "book", "price": 49.99, "properties": { "title": "XQuery Kick Start", "author": [ "James McGovern", "Per Bothner", "Kurt Cagle", "James Linn", "Kurt Cagle", "Vaidyanathan Nagarajan" ], "year": 2003 } } }, { "item": { "type": "book", "price": 39.95, "properties": { "title": "Learning XML", "author": [ "Erik T. Ray" ], "year": 2003 } } } ]

Flow Response

<?xml version='1.0' encoding='UTF-8'?> <books> <book year="2005"> <price currency="EUR">27.60</price> <price currency="ARS">262.80</price> <price currency="GBP">19.80</price> <title>Everyday Italian</title> <authors> <author>Giada De Laurentiis</author> </authors> </book> <book year="2005"> <price currency="EUR">27.5908</price> <price currency="ARS">262.7124</price> <price currency="GBP">19.7934</price> <title>Harry Potter</title> <authors> <author>J K. Rowling</author> </authors> </book> </books>

Mule Flow Source

<http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8081" doc:name="HTTP Listener Configuration"/> <file:connector name="File" autoDelete="false" streaming="true" validateConnections="true" pollingFrequency="90000" doc:name="File"/> <flow name="dataweaveFlow-multi-input"> <http:listener config-ref="HTTP_Listener_Configuration" path="/multi" doc:name="HTTP"/> <set-variable variableName="two" value="{&quot;USD&quot;:[{&quot;currency&quot;: &quot;EUR&quot;, &quot;ratio&quot;:0.92},{&quot;currency&quot;: &quot;ARS&quot;, &quot;ratio&quot;:8.76},{&quot;currency&quot;: &quot;GBP&quot;, &quot;ratio&quot;:0.66}]}" doc:name="flowVariable_JSON" mimeType="application/json"/> <set-variable variableName="three" value="&lt;publishedAfter&gt;2004&lt;/publishedAfter&gt;" doc:name="flowVariable_XML" mimeType="application/xml"/> <dw:transform-message doc:name="Transform Message"> <dw:set-payload><![CDATA[%dw 1.0 %input payload application/json %var in1=flowVars['two'] %var in2=flowVars['three'] %output application/xml --- books: { (payload filter $.item.properties.year > in2.publishedAfter map using (it = $.item, props = $.item.properties) { book @(year: props.year): { (in1.USD map { price @(currency: $.currency): $.ratio * it.price }), title: props.title, authors: { (props.author map { author: $ }) } } }) }]]></dw:set-payload> </dw:transform-message> <byte-array-to-string-transformer doc:name="Byte Array to String"/> <logger message="#[payload]" level="INFO" doc:name="Logger"/> </flow>