Package org.axonframework.eventsourcing.configuration

Class EventSourcingConfigurationDefaults

java.lang.Object

org.axonframework.eventsourcing.configuration.EventSourcingConfigurationDefaults

All Implemented Interfaces:

ConfigurationEnhancer

public class EventSourcingConfigurationDefaults
extends Object
implements ConfigurationEnhancer

A ConfigurationEnhancer registering the default components of the EventSourcingConfigurer.

This enhancer disables the EventBusConfigurationDefaults to prevent duplicate EventBus registration, as the EventStore implementation serves as the EventBus in event sourcing scenarios.

Will only register the following components if there is no component registered for the given class yet:

• Registers a AnnotationBasedTagResolver for class TagResolver
• Registers a InMemoryEventStorageEngine for class EventStorageEngine
• Registers a StorageEngineBackedEventStore for class EventStore

Furthermore, this enhancer will decorate the:

• The EventStorageEngine in a SnapshotCapableEventStorageEngine if a SnapshotStore is present and it is not the same instance as the engine. When the engine and the snapshot store are the same instance, the engine handles snapshots natively (potentially in a single round-trip) and wrapping it would degrade performance.
• The EventStore in a InterceptingEventStore if there are any MessageDispatchInterceptors present in the DispatchInterceptorRegistry.

Since:

5.0.0

Author:

Steven van Beelen, John Hendrikx

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ENHANCER_ORDER	The order of this enhancer compared to others, equal to 100 positions before MessagingConfigurationDefaults (thus, MessagingConfigurationDefaults.ENHANCER_ORDER - 100).

Constructor Summary

Constructors

Constructor	Description
EventSourcingConfigurationDefaults()

Method Summary

Modifier and Type	Method	Description
void	enhance(ComponentRegistry registry)	Enhances the given registry with, for example, additional components and decorators.
int	order()	Returns the relative order this enhancer should be invoked in, compared to other instances.

Methods inherited from class java.lang.Object

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

Field Details

ENHANCER_ORDER

public static final int ENHANCER_ORDER

The order of this enhancer compared to others, equal to 100 positions before MessagingConfigurationDefaults (thus, MessagingConfigurationDefaults.ENHANCER_ORDER - 100).

See Also:

• Constant Field Values

Constructor Details

EventSourcingConfigurationDefaults

public EventSourcingConfigurationDefaults()

Method Details

order

public int order()

Description copied from interface: ConfigurationEnhancer

Returns the relative order this enhancer should be invoked in, compared to other instances.

Use lower (negative) values for enhancers providing sensible defaults, and higher values for enhancers that should be able to override values potentially previously set. Defaults to 0 when not set.

Specified by:

order in interface ConfigurationEnhancer

Returns:

The order in which this enhancer should be invoked.

enhance

public void enhance(ComponentRegistry registry)

Description copied from interface: ConfigurationEnhancer

Enhances the given registry with, for example, additional components and decorators.

Specified by:

enhance in interface ConfigurationEnhancer

Parameters:

registry - The registry instance to enhance.