Package org.axonframework.eventsourcing.eventstore

Class AnnotationBasedTagResolver

java.lang.Object

org.axonframework.eventsourcing.eventstore.AnnotationBasedTagResolver

All Implemented Interfaces:

TagResolver

public class AnnotationBasedTagResolver
extends Object
implements TagResolver

Implementation of TagResolver that processes EventTag and EventTags annotation on fields and methods of event payload objects to create Tag instances. Supports inherited fields and methods.

The EventTag annotation can be used in two ways:

• Directly on fields and methods using the repeatable syntax:

           @EventTag
           @EventTag(key = "identifier")
           private String id;
           

• Using the container annotation EventTags:

           @EventTags({
               @EventTag,
               @EventTag(key = "identifier")
           })
           private String id;
           

Both approaches are equivalent and will produce the same tags.

Since:

5.0.0

Author:

Mateusz Nowak

See Also:

• for more information on how to use the annotation
• for more information on how to use the annotation

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AnnotationBasedTagResolver.TagResolutionException	Exception thrown when tag resolution fails.

Constructor Summary

Constructors

Constructor	Description
AnnotationBasedTagResolver()

Method Summary

Modifier and Type	Method	Description
Set<Tag>	resolve(EventMessage event)	Resolves a Set of Tags for the given event.

Methods inherited from class java.lang.Object

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

Constructor Details

AnnotationBasedTagResolver

public AnnotationBasedTagResolver()

Method Details

resolve

public Set<Tag> resolve(EventMessage event)

Description copied from interface: TagResolver

Resolves a Set of Tags for the given event.

Specified by:

resolve in interface TagResolver

Parameters:

event - The event to resolve a Set of Tags for.

Returns:

A Set of Tags for the given event.