Package org.axonframework.extension.springboot.autoconfig

Class LegacySagaAutoConfiguration

java.lang.Object

org.axonframework.extension.springboot.autoconfig.LegacySagaAutoConfiguration

@AutoConfiguration(afterName={"org.axonframework.extension.springboot.autoconfig.LegacyJpaSagaStoreAutoConfiguration","org.axonframework.extension.springboot.autoconfig.LegacyJdbcSagaStoreAutoConfiguration"})
@ConditionalOnClass(SagaStore.class)
public class LegacySagaAutoConfiguration
extends Object

Autoconfiguration class enabling Spring Boot support for Axon Framework 4 Saga-annotated types, ported into axon-legacy.

Registers the SpringSagaLookup that discovers @Saga-annotated beans, and provides an InMemorySagaStore as a last-resort SagaStore bean. Without any SagaStore component, SagaConfigurer.forType(...) refuses to build a Saga's EventHandlingComponent at all, so a store is a hard requirement, not merely a convenience. Axon Framework 4 hid this same default inside its SagaConfigurer; here it is an explicit, overridable bean instead.

Activates only when axon-legacy is present on the classpath (evidenced by SagaStore being loadable). LegacyJpaSagaStoreAutoConfiguration and LegacyJdbcSagaStoreAutoConfiguration run before this class so their SagaStore beans, when applicable, take precedence over the in-memory fallback.

Since:

5.4.0

Author:

Mateusz Nowak

Constructor Summary

Constructors

Constructor	Description
LegacySagaAutoConfiguration()

Method Summary

Modifier and Type	Method	Description
SagaProcessorConfigurer	sagaProcessorConfigurer()	Provides the SagaProcessorConfigurer that assembles the event processors carrying the discovered Sagas.
InMemorySagaStore	sagaStore()	Provides an InMemorySagaStore when no other SagaStore bean is present.
static SpringSagaLookup	springSagaLookup()	Provides the SpringSagaLookup that discovers @Saga-annotated bean definitions and registers a SpringSagaDescriptor for each of them.

Methods inherited from class java.lang.Object

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

Constructor Details

LegacySagaAutoConfiguration

public LegacySagaAutoConfiguration()

Method Details

springSagaLookup

@Role(2)
@Bean
public static SpringSagaLookup springSagaLookup()

Provides the SpringSagaLookup that discovers @Saga-annotated bean definitions and registers a SpringSagaDescriptor for each of them.

Static, like InfrastructureAutoConfiguration.messageHandlerLookup(), so it can run as a BeanFactoryPostProcessor before other bean definitions in this context are fully processed.

Returns:

the lookup that discovers @Saga-annotated beans for later configuration

sagaProcessorConfigurer

@Bean
public SagaProcessorConfigurer sagaProcessorConfigurer()

Provides the SagaProcessorConfigurer that assembles the event processors carrying the discovered Sagas.

Sagas get their own assembly rather than riding the regular DefaultProcessorModuleFactory pipeline, so that no part of Saga support has to be threaded through the handler discovery every Axon Framework 5 Spring application uses. Dropping axon-legacy therefore removes Saga support whole.

Returns:

the enhancer assembling the event processors for discovered Sagas

sagaStore

@Bean
@ConditionalOnMissingBean(SagaStore.class)
public InMemorySagaStore sagaStore()

Provides an InMemorySagaStore when no other SagaStore bean is present.

This is the final fallback in the precedence chain: a user-defined bean wins over LegacyJpaSagaStoreAutoConfiguration's JpaSagaStore, which wins over LegacyJdbcSagaStoreAutoConfiguration's JdbcSagaStore, which wins over this in-memory store.

Returns:

an in-memory SagaStore