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  2. Mule Runtime (3.2)
  3. Essentials of Using Mule ESB 3
  4. Using Transformers
  5. Creating Custom Transformers

  6. Payload Annotation

@Payload Annotation

A parameter injection annotation that can be used on component entry points and transformer methods defined using the @Transformer annotation, this annotation controls how the current message payload is passed into a method by performing automatic transformation of the message payload to match the annotated parameter type. For example, if you are expecting an XML document, this can be injected into a component entry point and automatically converted into a org.wc3.dom.Document.

public class MyComponent {    public Object process(@Payload Document doc) {        // do stuff    }}

Annotated Component Methods

Note that when using Annotations on component methods, all parameters need to be annotated for the method to be invoked. You will almost always be using the @Payload annotation to mark the message payload parameter.