org.axonframework.commandhandling

Class DuplicateCommandHandlerResolution

java.lang.Object

org.axonframework.commandhandling.DuplicateCommandHandlerResolution

public abstract class DuplicateCommandHandlerResolution
extends Object

Enumeration describing a set of reasonable DuplicateCommandHandlerResolver implementations. Can be used to configure how a CommandBus should react upon a duplicate subscription of a command handling function.

Since:

4.2

Author:

Steven van Beelen

Constructor Summary

Constructors

Constructor and Description
DuplicateCommandHandlerResolution()

Method Summary

Modifier and Type	Method and Description
static DuplicateCommandHandlerResolver	logAndOverride() A DuplicateCommandHandlerResolver implementation which logs a warning message and resolve to returning the duplicate handler and overriding the existing command handler.
static DuplicateCommandHandlerResolver	rejectDuplicates() A DuplicateCommandHandlerResolver implementation which throws a DuplicateCommandHandlerSubscriptionException.
static DuplicateCommandHandlerResolver	silentOverride() A DuplicateCommandHandlerResolver implementation that allows handlers to silently override previous registered handlers for the same command.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DuplicateCommandHandlerResolution

public DuplicateCommandHandlerResolution()

Method Detail

logAndOverride

public static DuplicateCommandHandlerResolver logAndOverride()

A DuplicateCommandHandlerResolver implementation which logs a warning message and resolve to returning the duplicate handler and overriding the existing command handler.

Returns:

an instance that logs duplicates

rejectDuplicates

public static DuplicateCommandHandlerResolver rejectDuplicates()

A DuplicateCommandHandlerResolver implementation which throws a DuplicateCommandHandlerSubscriptionException.

Returns:

an instance that fails on duplicate registrations

silentOverride

public static DuplicateCommandHandlerResolver silentOverride()

A DuplicateCommandHandlerResolver implementation that allows handlers to silently override previous registered handlers for the same command.

Returns:

an instance that silently accepts duplicates