Package org.springframework.messaging.handler.annotation

Annotation Interface Payload

@Target({PARAMETER,METHOD})
@Retention(RUNTIME)
@Documented
public @interface Payload

Annotation that binds a method parameter to the payload of a message. Can also be used to associate a payload to a method invocation. The payload may be passed through a MessageConverter to convert it from serialized form with a specific MIME type to an Object matching the target method parameter.

Since:

4.0

Author:

Rossen Stoyanchev, Sam Brannen

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element	Description
String	expression	A SpEL expression to be evaluated against the payload object as the root context.
boolean	required	Whether payload content is required.
String	value	Alias for expression().

Element Details

value

@AliasFor("expression")
String value

Alias for expression().

Default:

""

expression

@AliasFor("value")
String expression

A SpEL expression to be evaluated against the payload object as the root context.

This attribute may or may not be supported depending on whether the message being handled contains a non-primitive Object as its payload or is in serialized form and requires message conversion.

This attribute is not supported for:

• STOMP over WebSocket messages
• RSocket interface client

Since:

4.2

Default:

""

required

boolean required

Whether payload content is required.

Default is true, leading to an exception if there is no payload. Switch to false to have null passed when there is no payload.

Default:

true