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  5. Set Payload Transformer Reference

Set Payload Transformer Reference

This transformer sets the payload to whatever you define. The payload can be a literal string or a Mule Expression.

Configuration

STUDIO Visual Editor

Studio_set-payload
Field Value Description XML

Display Name

Set Payload

Customize to display a unique name for the transformer in your application.

 
doc:name="Set Payload"

Value

String or Mule Expression

Enter a literal string or a Mule expression that defines how Mule should set the payload.

 
value="#['Hello, ' + message.payload]"

XML Editor or Standalone

# Example setting a payload to a literal string.

<set-payload value="MyNewPayload" doc:name="Set Payload"/>

# Example setting a payload using a Mule expression. This takes the current payload and transformes it by adding the string "Hello, " in front of it. Thus, if your payload was "Charlie", this set-payload transformer changes it to "Hello, Charlie".

<set-payload value="#['Hello, ' + message.payload]" doc:name="Set Payload"/>
Element Description

set-payload

Set a payload on your message (as shown in examples above).
Element Attribute Description

value

The literal string or Mule expression that defines how Mule should set the payload.

doc:name

Customize to display a unique name for the transformer in your application.

Note: Attribute not required in Mule Standalone configuration.

Example

In this example, the Set Payload transformer sets the payload to a "Hello, World" message that includes today’s date (retrieved using a Mule expression.)

STUDIO Visual Editor

hello flow
Studio_setpayload_example

XML Editor or Standalone

<?xml version="1.0" encoding="UTF-8"?>

<mule xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation" xmlns:spring="http://www.springframework.org/schema/beans" version="EE-3.4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="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/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd">

    <flow name="HelloFlow1" doc:name="HelloFlow1">

        <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8081" doc:name="HTTP"/>

        <set-payload value="#['Hello, World!' + ' Today is ' + server.dateTime.format('dd/MM/yy')]" doc:name="Set Payload"/>

    </flow>

</mule>

See Also