Package org.axonframework.modelling.saga

Class SagaMethodMessageHandlingMember<T>

java.lang.Object

org.axonframework.messaging.annotation.WrappedMessageHandlingMember<T>

org.axonframework.modelling.saga.SagaMethodMessageHandlingMember<T>

All Implemented Interfaces:

MessageHandlingMember<T>

public class SagaMethodMessageHandlingMember<T>
extends WrappedMessageHandlingMember<T>

A data holder containing information of SagaEventHandler annotated methods.

Since:

2.0

Author:

Allard Buijze, Sofia Guy Ang

Constructor Summary

Constructors

Constructor	Description
SagaMethodMessageHandlingMember(MessageHandlingMember<T> delegate, SagaCreationPolicy creationPolicy, String associationKey, String associationPropertyName, AssociationResolver associationResolver)	Creates a SagaMethodMessageHandler.

Method Summary

Modifier and Type	Method	Description
AssociationValue	getAssociationValue(EventMessage<?> eventMessage)	The AssociationValue to find the saga instance with, or null if no AssociationValue can be found on the given eventMessage.
SagaCreationPolicy	getCreationPolicy()	Returns the creation policy of the inspected method.
Object	handle(Message<?> message, T target)	Handles the given message by invoking the appropriate method on given target.

Methods inherited from class org.axonframework.messaging.annotation.WrappedMessageHandlingMember

annotationAttributes, attribute, canHandle, canHandleMessageType, canHandleType, hasAnnotation, payloadType, priority, unwrap

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axonframework.messaging.annotation.MessageHandlingMember

declaringClass, signature

Constructor Details

SagaMethodMessageHandlingMember

public SagaMethodMessageHandlingMember(MessageHandlingMember<T> delegate,
 SagaCreationPolicy creationPolicy,
 String associationKey,
 String associationPropertyName,
 AssociationResolver associationResolver)

Creates a SagaMethodMessageHandler.

Parameters:

delegate - The message handler for the event

creationPolicy - The creation policy for the handlerMethod

associationKey - The association key configured for this handler

associationPropertyName - The association property name to look up in the message

associationResolver - The association resolver configured for this handler

Method Details

getAssociationValue

public AssociationValue getAssociationValue(EventMessage<?> eventMessage)

The AssociationValue to find the saga instance with, or null if no AssociationValue can be found on the given eventMessage.

Parameters:

eventMessage - The event message containing the value of the association

Returns:

the AssociationValue to find the saga instance with, or null if none found

handle

public Object handle(@Nonnull
 Message<?> message,
 T target)
              throws Exception

Description copied from interface: MessageHandlingMember

Handles the given message by invoking the appropriate method on given target. This may result in an exception if the given target is not capable of handling the message or if an exception is thrown during invocation of the method.

Specified by:

handle in interface MessageHandlingMember<T>

Overrides:

handle in class WrappedMessageHandlingMember<T>

Parameters:

message - The message to handle

target - The target to handle the message

Returns:

The message handling result in case the invocation was successful

Throws:

Exception - when there was a problem that prevented invocation of the method or if an exception was thrown from the invoked method

getCreationPolicy

public SagaCreationPolicy getCreationPolicy()

Returns the creation policy of the inspected method.

Returns:

the creation policy of the inspected method