Spring Boot - Multiple Data Sources and Pluggable Variable Persistence

        <marshalling-strategy>
            <resolver>mvel</resolver>
            <identifier>new org.drools.persistence.jpa.marshaller.JPAPlaceholderResolverStrategy(auditEntityManager)
            </identifier>
            <parameters/>
        </marshalling-strategy>

    @Bean(name = "auditEntityManager")
    @ConditionalOnMissingBean(name = "auditEntityManager")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(@Qualifier("jpaAuditDataSource") DataSource dataSource, 
                                                                       JpaProperties jpaProperties) {
        return EntityManagerFactoryHelper.create(applicationContext,
                                                 dataSource,
                                                 jpaProperties,
                                                 AUDIT_PERSISTENCE_UNIT_NAME,
                                                 PERSISTENCE_XML_LOCATION);
    }