public class ExampleAttributeConverter implements AttributeConverter<Attribute, Long> {
       
	public ExampleRepository exampleRepository;

       // constructor injection
	public DocumentTypeConverter(ExampleRepository exampleRepository){
		this.exampleRepository = exampleRepository;
	}

	@Override
	public Long convertToDatabaseColumn(Attribute attribute) {
              // perform operation with repository
	}

	@Override
	public Attribute convertToEntityAttribute(Long dbData) {
              // perform operation with repository
	}
}

 Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'exampleRepository': Cannot create inner bean '(inner bean)#59fc0247' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#59fc0247': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'entityManagerFactory': FactoryBean which is currently in creation returned null from getObject
    Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#59fc0247': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'entityManagerFactory': FactoryBean which is currently in creation returned null from getObject
    Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'entityManagerFactory: FactoryBean which is currently in creation returned null from getObject"},
    "WFLYCTL0412: Required services that are not installed:" => ["jboss.undertow.deployment.default-server.default-host./ExampleService"],
    "WFLYCTL0180: Services with missing/unavailable dependencies" => undefined
}
}

@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(ConfigurableListableBeanFactory beanFactory) {

	final LocalContainerEntityManagerFactoryBean bean = new LocalContainerEntityManagerFactoryBean();

	bean.getJpaPropertyMap().put(AvailableSettings.BEAN_CONTAINER, new SpringBeanContainer(beanFactory));

	bean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
	bean.setJtaDataSource(dataSource());
	bean.setLoadTimeWeaver(new InstrumentationLoadTimeWeaver());
	bean.setPackagesToScan(new String[] { "com.example.test" });

	final Properties props = new Properties();
	props.setProperty("hibernate.dialect", "org.hibernate.dialect.Oracle10gDialect");
	//props.setProperty("hibernate.show_sql", "true");
	props.setProperty("hibernate.format_sql", "true");
	props.setProperty("hibernate.transaction.coordinator_class", "jta");
	props.setProperty("hibernate.transaction.jta.platform",
	"org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform");

	bean.setJpaProperties(props);
	return bean;
}

@Autowired
public ExampleRepository exampleRepository;