java - 有没有办法使用通用的 Spring Data JPA 存储库实现？

Question

我正在设置一个包含 100 多个实体的新 Spring Boot API(使用 JHipster )，我的问题是:鉴于我有一组存储库层方法，我希望所有存储库都能够调用这些方法.

我已经尝试使所有 .*Repository 接口(interface)扩展 .*RepositoryQuery (“RepositoryQuery”是我的默认自定义接口(interface)名称后缀)，然后实现这些与特定于实体的 .*RepositoryQueryImpl 类的接口(interface)。请注意，所有 .*RepositoryQueryImpl 类都扩展了一个名为 BaseRepositoryQueryImpl 的通用实现类。

请注意，给定正则表达式中的“.*”代表我的持久实体集中的任何实体。

下面显示的代码以及关键类和接口(interface):

1. 我的 super 界面

public interface BaseRepositoryQuery<T, PK> {
   public List<T> retrieveByCriteria(T searchCriteria);
   // other methods go here ...
}

我的 Super 实现

public class BaseRepositoryQueryImpl<T, PK> implements BaseRepositoryQuery<T, PK> {
   @PersistenceContext
   private EntityManager em;

   private Class<T> businessClass;

   protected BaseRepositoryQueryImpl(Class<T> businessClass) {
     this.businessClass = businessClass;
   }

   public List<T> retrieveByCriteria(T searchCriteria) {
     // ...
   }
   // other methods go here ...
}

实体的 RepositoryQuery 接口(interface):

public interface SomeEntityRepositoryQuery extends BaseRepositoryQuery<SomeEntity, Long> {}

实体的存储库实现:

public class SomeEntityRepositoryQueryImpl extends BaseRepositoryQueryImpl<SomeEntity, Long> implements SomeEntityRepositoryQuery {

 public SomeEntityRepositoryQueryImpl(Class<SomeEntity> businessClass) {
   super(businessClass);
 }

 public SomeEntityRepositoryQueryImpl() {
   super(SomeEntity.class);
 }
}

实体Repository接口(interface):

@Repository
public interface SomeEntityRepository extends SomeEntityRepositoryQuery, JpaRepository<SomeEntity, Long> {
  // other methods go here...
}

然后，我的想法是注入(inject)一些像这样的实体存储库 bean(在 Spring Controller 或服务中):

@Autowired
  private SomeEntityRepository someEntityRepository;

请注意，“SomeEntity”可以是我的一组持久实体中的任何实体(抱歉这么明显)。此外，我已经将我的配置设置为:

@Configuration
@EnableJpaRepositories("<my base jpa repositories package here>")

到目前为止，我所拥有的(运行 Maven)只是一个错误日志:

... bunch of lines here...
org.springframework.beans.factory.UnsatisfiedDependencyException:
 Error creating bean with name 'agentServicesImpl': Unsatisfied dependency expressed through field 'agentRepository'; 
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'agentRepository': 
Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract java.lang.Object 

br.ufpa.labes.spm.repository.interfaces.BaseRepositoryQuery.retrieveBySecondaryKey(java.lang.String)! No property retrieveBySecondaryKey found for type Agent!
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
        at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:742)
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:389)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)
        at br.ufpa.labes.spm.SpmApp.main(SpmApp.java:63)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
... here too ...

我怀疑该错误可能与 Spring 存储库命名有关，并且我已经尝试查看其他 SO 线程，但没有一个适合此上下文。

Answer 1

请检查 BaseRepositoryQuery..您可能使用的字段不正确。这就是它提示的原因。