org.axonframework.saga.annotation
Class SagaMethodMessageHandler

java.lang.Object
  org.axonframework.saga.annotation.SagaMethodMessageHandler

All Implemented Interfaces:

Comparable<SagaMethodMessageHandler>

public class SagaMethodMessageHandler
extends Object
implements Comparable<SagaMethodMessageHandler>

A data holder containing information of SagaEventHandler annotated methods.

Since:

2.0

Author:

Allard Buijze

Constructor Summary

protected

SagaMethodMessageHandler(SagaCreationPolicy creationPolicy, MethodMessageHandler handler, String associationKey, Method associationProperty) Creates a SagaMethodMessageHandler.

Method Summary

int	compareTo(SagaMethodMessageHandler o)
boolean	equals(Object o)
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.
static SagaMethodMessageHandler	getInstance(MethodMessageHandler methodHandler) Create a SagaMethodMessageHandler for the given methodHandler.
int	hashCode()
boolean	isHandlerAvailable() Indicates whether the inspected method is an Event Handler.
boolean	matches(EventMessage message) Indicates whether this Handler is suitable for the given message.
static SagaMethodMessageHandler	noHandler() Returns a SagaMethodMessageHandler indicating that a inspected method is *not* a SagaEventHandler.

Methods inherited from class java.lang.Object

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

Constructor Detail

SagaMethodMessageHandler

protected SagaMethodMessageHandler(SagaCreationPolicy creationPolicy,
                                   MethodMessageHandler handler,
                                   String associationKey,
                                   Method associationProperty)

Creates a SagaMethodMessageHandler.

Parameters:

creationPolicy - The creation policy for the handlerMethod

handler - The handler for the event

associationKey - The association key configured for this handler

associationProperty - The association property configured for this handler

Method Detail

noHandler

public static SagaMethodMessageHandler noHandler()

Returns a SagaMethodMessageHandler indicating that a inspected method is *not* a SagaEventHandler.

Returns:

a SagaMethodMessageHandler indicating that a inspected method is *not* a SagaEventHandler

getInstance

public static SagaMethodMessageHandler getInstance(MethodMessageHandler methodHandler)

Create a SagaMethodMessageHandler for the given methodHandler. The SagaMethodMessageHandler add information specific to the behavior of Sagas, such as the association value and creation policy.

Parameters:

methodHandler - The handler for incoming events

Returns:

a SagaMethodMessageHandler for the handler

isHandlerAvailable

public boolean isHandlerAvailable()

Indicates whether the inspected method is an Event Handler.

Returns:

true if the saga has a handler

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

getCreationPolicy

public SagaCreationPolicy getCreationPolicy()

Returns the creation policy of the inspected method.

Returns:

the creation policy of the inspected method

matches

public boolean matches(EventMessage message)

Indicates whether this Handler is suitable for the given message.

Parameters:

message - The message to inspect

Returns:

true if this handler can handle the message, otherwise false.

compareTo

public int compareTo(SagaMethodMessageHandler o)

Specified by:

compareTo in interface Comparable<SagaMethodMessageHandler>

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object