Using expression component
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The Expression Component evaluates a Mule Expression and unlike the Expression Transformer, it does not replace the message payload with the results. It can be configured with a display name and expression to evaluate directly or by referencing an expression in a file. Examples show assigning a session variable to the payload.
![Configuration :
Display name: Type a useful name for the transformer to display in your flow
(optional)
Expression: The expression to evaluate. Expression wrapper #[] is not
needed in expression-component
File: Absolute path of the file containing the expression to evaluate. Click the
ellipsis (…) button next to the File field to select the file with a browser](https://image.slidesharecdn.com/usingexpressioncomponent-160901210340/85/Using-expression-component-4-320.jpg)
Using expression component
- 1. Using Expression Component - By Rahul Kumar
- 3. Expression Component Expression Component evaluates a Mule Expression Unlike the Expression Transformer, the expression component does not replace the message payload with the results of expression evaluation.
- 4. Configuration : Display name: Type a useful name for the transformer to display in your flow (optional) Expression: The expression to evaluate. Expression wrapper #[] is not needed in expression-component File: Absolute path of the file containing the expression to evaluate. Click the ellipsis (…) button next to the File field to select the file with a browser
- 5. Examples <expression-component>payload=sessionVars.sessionId;</expression-component> The above Expression component assigns a session variable sessionId to the payload
- 6. Thank You !!