public class AnnotationCommandHandlerAdapter extends Object implements MessageHandler<CommandMessage<?>>, SupportedCommandNamesAware
@CommandHandler
annotated bean into a MessageHandler
implementation. Each annotated method is subscribed
as a CommandHandler at the CommandBus
for the command type specified by the parameter of that method.CommandHandler
Constructor and Description |
---|
AnnotationCommandHandlerAdapter(Object annotatedCommandHandler)
Wraps the given
annotatedCommandHandler , allowing it to be subscribed to a Command Bus. |
AnnotationCommandHandlerAdapter(Object annotatedCommandHandler,
ParameterResolverFactory parameterResolverFactory)
Wraps the given
annotatedCommandHandler , allowing it to be subscribed to a Command Bus. |
Modifier and Type | Method and Description |
---|---|
Object |
handle(CommandMessage<?> command)
Invokes the @CommandHandler annotated method that accepts the given
command . |
Registration |
subscribe(CommandBus commandBus)
Subscribe this command handler to the given
commandBus . |
Set<String> |
supportedCommandNames()
Returns the set of command names this component supports.
|
public AnnotationCommandHandlerAdapter(Object annotatedCommandHandler)
annotatedCommandHandler
, allowing it to be subscribed to a Command Bus.annotatedCommandHandler
- The object containing the @CommandHandler annotated methodspublic AnnotationCommandHandlerAdapter(Object annotatedCommandHandler, ParameterResolverFactory parameterResolverFactory)
annotatedCommandHandler
, allowing it to be subscribed to a Command Bus.annotatedCommandHandler
- The object containing the @CommandHandler annotated methodsparameterResolverFactory
- The strategy for resolving handler method parameter valuespublic Registration subscribe(CommandBus commandBus)
commandBus
. The command handler will be subscribed
for each of the supported commands.commandBus
- The command bus instance to subscribe topublic Object handle(CommandMessage<?> command) throws Exception
command
.handle
in interface MessageHandler<CommandMessage<?>>
command
- The command to handlenull
when the annotated handler has a
void
return value.NoHandlerForCommandException
- when no handler is found for given command
.Exception
- any exception occurring while handling the commandpublic Set<String> supportedCommandNames()
SupportedCommandNamesAware
supportedCommandNames
in interface SupportedCommandNamesAware
Copyright © 2010–2017. All rights reserved.