Package org.axonframework.modelling.entity

Interface EntityCommandHandler<E>

Type Parameters:

E - The type of the entity.

All Superinterfaces:

MessageHandler

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface EntityCommandHandler<E>
extends MessageHandler

Functional interface describing a handler of a CommandMessage for that uses an entity to make a decision. This is typically used in the context of an EntityMetamodel where the entity instance is passed to the handler to allow for more complex command handling logic.

Since:

5.0.0

Author:

Mitchell Herrijgers

See Also:

• EntityMetamodel

Method Summary

Modifier and Type	Method	Description
MessageStream.Single<CommandResultMessage>	handle(CommandMessage command, E entity, ProcessingContext context)	Handles the given CommandMessage for the given entity.

Method Details

handle

@Nonnull
MessageStream.Single<CommandResultMessage> handle(@Nonnull
 CommandMessage command,
 @Nonnull
 E entity,
 @Nonnull
 ProcessingContext context)

Handles the given CommandMessage for the given entity.

Parameters:

command - The CommandMessage to handle.

entity - The entity instance to handle the command for.

context - The ProcessingContext for the command.

Returns:

The result of the command handling, which may be a CommandResultMessage or an error message.