io.micronaut.http.annotation

Annotation Type RequestAttribute

@Documented
 @Retention(value=RUNTIME)
 @Target(value={PARAMETER,TYPE,METHOD,ANNOTATION_TYPE})
 @Repeatable(value=RequestAttributes.class)
 @Bindable
public @interface RequestAttribute

An annotation that can be applied to method arguments to indicate that the method argument is bound to an HTTP request attribute This can also be used in conjuction with @RequestAttributes to list attributes on a client class that will always be applied Note: Request attributes are intended for internal data sharing only, and are not attached to the outbound request.

The following example demonstrates usage at the type level to declare default values to pass in the request when using the Client annotation;

 @RequestAttribute(name="X-Username",value='Freddy'),
 @RequestAttribute(name="X-MyParam",value='${foo.bar}')
 @Client('/users')
 interface UserClient {

 }
 

When declared as a binding annotation the @RequestAttribute annotation is declared on each parameter to be bound:

 @Get('/user')
 User get(@RequestAttribute('X-Username') String username, @RequestAttribute('X-MyParam') String myparam) {
    return new User(username, myparam);
 }
 

Since:

1.0

Author:

Ahmed Lafta

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
String	defaultValue
String	name If used on a class level with @RequestAttributes this is the attribute name and value is the value.
String	value If used as a bound parameter, this is the attribute name.

Element Detail

value

@AliasFor(annotation=Bindable.class,
          member="value")
public abstract String value

If used as a bound parameter, this is the attribute name. If used on a class level this is value and not the attribute name.

Returns:

The name of the attribute, otherwise it is inferred from the parameter name

Default:

""

name

@AliasFor(annotation=Bindable.class,
          member="value")
public abstract String name

If used on a class level with @RequestAttributes this is the attribute name and value is the value.

Returns:

name of header when using with @RequestAttributes

Default:

""

defaultValue

@AliasFor(annotation=Bindable.class,
          member="defaultValue")
public abstract String defaultValue

Returns:

The default value

See Also:

Bindable.defaultValue()

Default:

""