org.axonframework.commandhandling.annotation
Annotation Type CommandHandler

@Documented
@Retention(value=RUNTIME)
@Target(value={METHOD,CONSTRUCTOR})
public @interface CommandHandler

Marker annotation to mark any method on an object as being a CommandHandler. Use the AnnotationCommandHandlerAdapter to subscribe the annotated class to the command bus.

Alternatively, the annotations may be placed on an Aggregate members, in which case the AggregateAnnotationCommandHandler can be used to subscribe the handlers to the command bus. When the annotation appears on an Aggregate root's constructor, that command will cause a new aggregate to be created and stored in the repository provided with the AggregateAnnotationCommandHandler. If a non-root entity of the Aggregate is to handle a command, the field declaring that entity must be annotated with CommandHandlingMember. Note that the annotation may not be placed on a non-root Entity's constructor.

The annotated method's first parameter is the command handled by that method. Optionally, the command handler may specify a second parameter of type UnitOfWork. The active Unit of Work will be passed if that parameter is supplied.

Since:

0.5

Author:

Allard Buijze

See Also:

CommandHandlingMember

Optional Element Summary

String

commandName The name of the Command this handler listens to.

commandName

public abstract String commandName

The name of the Command this handler listens to. Defaults to the fully qualified class name of the payload type (i.e. first parameter).

Default:

""