org.axonframework.commandhandling

Interface CommandCallback<C,R>

Type Parameters:

R - the type of result of the command handling

C - the type of payload of the command

All Known Implementing Classes:

BlacklistDetectingCallback, CommandCallbackWrapper, FailureLoggingCallback, FutureCallback, LoggingCallback, MonitorAwareCallback, NoOpCallback, ResultValidatorImpl, RetryingCallback, WrappedCommandCallback

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 CommandCallback<C,R>

Interface describing a callback that is invoked when command handler execution has finished.

Since:

0.6

Author:

Allard Buijze

Method Summary

Modifier and Type	Method and Description
void	onResult(CommandMessage<? extends C> commandMessage, CommandResultMessage<? extends R> commandResultMessage) Invoked when command handling execution is completed.
default CommandCallback<C,R>	wrap(CommandCallback<C,R> wrappingCallback) Wraps the command callback with another using a WrappedCommandCallback.

Method Detail

onResult

void onResult(@Nonnull
              CommandMessage<? extends C> commandMessage,
              @Nonnull
              CommandResultMessage<? extends R> commandResultMessage)

Invoked when command handling execution is completed.

Parameters:

commandMessage - the CommandMessage that was dispatched

commandResultMessage - the CommandResultMessage of the command handling execution

wrap

default CommandCallback<C,R> wrap(CommandCallback<C,R> wrappingCallback)

Wraps the command callback with another using a WrappedCommandCallback. If provided with a null callback this method will not wrap it, keeping the original callback instead.

In effect, the given callback will be executed first, and then the original will be executed second. You can wrap callback as many times as you'd like.

Parameters:

wrappingCallback - The command callback that should wrap the current instance

Returns:

The WrappedCommandCallback representing the execution of both callbacks

Since:

4.6.0