如何将实体分布到 Spring-data-jpa 和 eclipselink 中的不同模块？

Question

我目前正在开发一个包含核心模块和不同 "extension" 模块的应用程序。核心模块包括基于 Spring 配置 class 的 JPA 配置以及一些 "basic" 实体及其存储库，它们将在 "extension" 模块中使用。扩展模块包含额外的 Entity classes 和 JPARepositories。为扩展模块启动 JUnit 测试时遇到以下错误：

No [ManagedType] was found for the key class [a.b.c.data.Config] in 
the Metamodel - please verify that the [Managed] class was referenced
in persistence.xml using a specific <class>a.b.c.data.Config</class>
property or a global <exclude-unlisted-classes>false</exclude-unlisted-classes>
element.

为此我尝试了三种不同的方法：

使用 setPackagesToScan 创建了一个名为 coreEntityManager 的 LocalContainerEntityManagerFactoryBean，包括核心和扩展包，其中包含 @Entity classes 和指向核心存储库包的 @EnableJpaRepositories 和 spring 配置具有指向扩展存储库包的@EnableJpaRepositories 的扩展
在 spring 配置中为扩展创建了一个额外的 LocalContainerEntityManagerFactoryBean，它具有自己的 JPaRepository 注释，并且 setPackagesToScan 仅指向包含 @Entity classes 的扩展包。本例中的 coreEntityManager 仅指向核心模块中包含 @Entity classes.
使用 setPackagesToScan 创建了一个名为 coreEntityManager 的 LocalContainerEntityManagerFactoryBean，包括核心和扩展包，其中包含 @Entity classes 和指向核心和扩展回购包的 @EnableJpaRepositories

使用前两种方法会出现已经提到的错误，而使用第三种方法则找不到配置存储库：

No qualifying bean of type 'a.b.c.ext.repositories.ConfigRepository' available

方法 1 的代码：

@Configuration
@ComponentScan(basePackages = {"a.b.c.core.services"})
@EnableJpaRepositories(basePackages = {"a.b.c.core.repositories"}, entityManagerFactoryRef = "coreEntityManager")
public class CoreJPAConfig {
...
    @Bean
    public LocalContainerEntityManagerFactoryBean coreEntityManager() {
        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        JpaVendorAdapter jpaVendorAdapter = new EclipseLinkJpaVendorAdapter();
        JpaDialect jpaDialect = new EclipseLinkJpaDialect();
        em.setJpaVendorAdapter(jpaVendorAdapter);
        em.setJpaDialect(jpaDialect);
        em.setJpaPropertyMap(getJpaProperties());
        em.setPersistenceUnitName("a.core");
        em.setPackagesToScan("a.b.c.core.data",
                "a.b.c.ext.data");
        em.setDataSource(dataSource());
        return em;
    }
...
}

Configuration
@ComponentScan(basePackages = {
        "a.b.c.config.services"})
@EnableJpaRepositories(basePackages = {"a.b.c.ext.repositories"}, entityManagerFactoryRef = "coreEntityManager")
public class JobSpringConfig {
...
}

方法 2 的代码：

@Configuration
@ComponentScan(basePackages = {"a.b.c.core.services"})
@EnableJpaRepositories(basePackages = {"a.b.c.core.repositories"}, entityManagerFactoryRef = "coreEntityManager")
public class CoreJPAConfig {
...
    @Bean
    public LocalContainerEntityManagerFactoryBean coreEntityManager() {
        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        JpaVendorAdapter jpaVendorAdapter = new EclipseLinkJpaVendorAdapter();
        JpaDialect jpaDialect = new EclipseLinkJpaDialect();
        em.setJpaVendorAdapter(jpaVendorAdapter);
        em.setJpaDialect(jpaDialect);
        em.setJpaPropertyMap(getJpaProperties());
        em.setPersistenceUnitName("a.core");
        em.setPackagesToScan("a.b.c.core.data");
        em.setDataSource(dataSource());
        return em;
    }
...
}

@Configuration
@ComponentScan(basePackages = {"a.b.c.config.services"})
@EnableJpaRepositories(basePackages = {"a.b.c.ext.repositories"}, entityManagerFactoryRef = "jobEntityManager")
public class JobSpringConfig {
...
    @Bean
    public LocalContainerEntityManagerFactoryBean jobEntityManager() {
        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        JpaVendorAdapter jpaVendorAdapter = new EclipseLinkJpaVendorAdapter();
        JpaDialect jpaDialect = new EclipseLinkJpaDialect();
        em.setJpaVendorAdapter(jpaVendorAdapter);
        em.setJpaDialect(jpaDialect);
        em.setJpaPropertyMap(getJpaProperties());
        em.setPersistenceUnitName("a.config");
        em.setPackagesToScan("a.b.c.ext.data");
        em.setDataSource(dataSource);
        return em;
    }

方法 3 的代码：

@Configuration
@ComponentScan(basePackages = {"a.b.c.core.services"})
@EnableJpaRepositories(basePackages = {"a.b.c.core.repositories",
        "a.b.c.ext.repositories"}, entityManagerFactoryRef = "coreEntityManager")
public class CoreJPAConfig {
...
    @Bean
    public LocalContainerEntityManagerFactoryBean coreEntityManager() {
        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        JpaVendorAdapter jpaVendorAdapter = new EclipseLinkJpaVendorAdapter();
        JpaDialect jpaDialect = new EclipseLinkJpaDialect();
        em.setJpaVendorAdapter(jpaVendorAdapter);
        em.setJpaDialect(jpaDialect);
        em.setJpaPropertyMap(getJpaProperties());
        em.setPersistenceUnitName("a.core");
        em.setPackagesToScan("a.b.c.core.data",
                "a.b.c.ext.data");
        em.setDataSource(dataSource());
        return em;
    }
...

我最后想要实现的是拥有一种 "Lego" 构建块，其中模块及其配置可以简单地作为依赖项添加，相应的配置实体（及其表）是添加到持久性单元而不需要进一步调整。

有人能帮帮我吗？

亲切的问候

缺陷

Answer 1

所以显然我没能见树不见林...我错过了其中一个扩展实体中的@Entity 注释...DUH！捂脸

感谢大家阅读我的问题并提供帮助！我真丢人！

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