Package com.opencqrs.framework.command

Interface CommandHandler.ForInstanceAndCommand<I,C extends Command,R>

Type Parameters:

I - the generic type of the instance to be event sourced before handling the command

C - the command type

R - the command execution result type

All Superinterfaces:

CommandHandler<I,C,R>

Enclosing interface:

CommandHandler<I,C extends Command,R>

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 static non-sealed interface CommandHandler.ForInstanceAndCommand<I,C extends Command,R>
extends CommandHandler<I,C,R>

FunctionalInterface to be implemented, if Command and event-sourced instance are needed for execution.

Nested Class Summary

Nested classes/interfaces inherited from interface com.opencqrs.framework.command.CommandHandler

CommandHandler.ForCommand<I,C extends Command,R>, CommandHandler.ForInstanceAndCommand<I,C extends Command,R>, CommandHandler.ForInstanceAndCommandAndMetaData<I,C extends Command,R>

Method Summary

Modifier and Type	Method	Description
R	handle(I instance, C command, CommandEventPublisher<I> commandEventPublisher)	Handles the given command on an event-sourced instance representing the current state (aka write model).

Method Details

handle

R handle(I instance,
 C command,
 CommandEventPublisher<I> commandEventPublisher)

Handles the given command on an event-sourced instance representing the current state (aka write model). The instance is sourced prior to calling this method based on CommandHandlerDefinition.sourcingMode() and a set of configured StateRebuildingHandlers. The given CommandEventPublisher enables the publication of new events upon successful command execution.

Parameters:

instance - the event-sourced instance the command is targeted at

command - the command payload to be executed

commandEventPublisher - a callback to publish new events

Returns:

a generic command execution result, may be null