Injecting object in Aggregate command Handler without spring boot

[David Stibbe]

Hi,

I have a configuration that looks as following : 

    @Bean("parameterResolverFactory")
    @Bean
    fun axonConfig(commandBus: CommandBus,
                   eventStore: EventStore,
                   projector: Projector): org.axonframework.config.Configuration {

        val configurer = DefaultConfigurer.defaultConfiguration()
        configurer.configureAggregate(MyAggregate::class.java)

        configurer.configureCommandBus { commandBus }
        configurer.configureEventStore { eventStore }


        val configuration = configurer
                .buildConfiguration()

        configuration.start()
        return configuration
    }

and 

configured a SpringParameterResolverFactoryBean:

@Bean("parameterResolverFactory")
fun parameterResolverFactory(): SpringParameterResolverFactoryBean {
    log.info("INIT SpringParameterResolverFactoryBean")
    return SpringParameterResolverFactoryBean()
}

However,

when I try to inject something in a command handler of my aggregate, eg:

@Aggregate
class MyAggregate() {

 ...

 @CommandHandler

fun doSomething(command: MyCommand, someInjectedThing:SomeThing) {

   ...
}

...

}

I get an exception during startup :

Caused by: org.axonframework.messaging.annotation.UnsupportedHandlerException: Unable to resolve parameter 1 (SomeThing) in handler public void nl.dstibbe.labs.axon.MyAggregate.doSomething(nl.dstibbe.labs.axon.MyCommand,nl.dstibbe.labs.axon.SomeThing).

which happens on configuration.start()

Any idea what I am missing?  I thought I had this working before, but it seems it isn't.

N.B.

This is really lacking in the docs

Kind regards,

David Stibbe

[Robert Delgado]

I'm experiencing the same issue -- however, instead of autowiring in the function I autowire at initialization... for example:

@Aggregate(repository="bidAggregateRepository")

public class BidAggregate {

@AggregateIdentifier

    private String id;

@Autowired

private BidServicesHelper bidhelper;

@Autowired

private HashMap<String,String> participantCache;

Needless to say, all my autowires are null

[Allard Buijze]

Autowires are null, because Spring doesn't manage your aggregates, hence, @Autowired is ignored.

David, the class I think you intend to use is the SpringBeanParameterResolverFactory. That's the ParameterResolver that allows you to resolve Spring Beans declared as parameters to @...Handler methods.

Note that when using Spring Boot, this is autoconfigured.

You may have to register the ParameterResolver with the configurer as a component:

configurer.registerComponent(ParameterResolverFactory.class, 

MultiParameterResolverFactory.ordered(ClasspathParameterResolverFactory.forClass(getClass()),                                                     new ConfigurationParameterResolverFactory(config),

 /* add your own here */)

Hope this helps.

Cheers,

Allard Buijze

CTO

E: allard...@axoniq.io

T: +31 6 34 73 99 89

--
You received this message because you are subscribed to the Google Groups "Axon Framework Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to axonframewor...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.