我想用Spring Boot和Spring数据JPA创建一个非阻塞休息服务。为什么Spring-Data-JPA Async不起作用?
如何使用Spring Data JPA @Async支持异步保存实体。下面的代码不适用于我,虽然其他选择似乎在同一个实体上工作。
我想在JPA存储库中这样做。这里是完整的存储库:除了保存。这些方法都工作正常,我可以但是测试他们
public interface LoanRepository extends JpaRepository<Loan,Long> {
@Query("select distinct loan from Loan loan left join fetch loan.collaterals left join fetch loan.partys")
@Async
CompletableFuture<List<Loan>> findAllWithEagerRelationships();
@Query("select loan from Loan loan left join fetch loan.collaterals left join fetch loan.partys where loan.id =:id")
@Async
CompletableFuture<Loan> findOneWithEagerRelationships(@Param("id") Long id);
@Async
void delete(Long id);
}
,当我尝试添加下面的保存方法:
@Async
<S extends CompletableFuture<Loan>> S save(Loan loan);
我得到一个明显的编译错误,说:"The method save(Loan) is ambiguous for the type LoanRepository"
我试图将其更改为:
@Async
<S extends CompletableFuture<Loan>> S save(S loan);
但我会在启动时java.lang.UnsupportedOperationException: null
异常这是由于:
Caused by: java.lang.NullPointerException: null
at org.springframework.data.repository.query.QueryMethod.potentiallyUnwrapReturnTypeFor(QueryMethod.java:244)
上异步支持春耕数据JPA文档是不是在它的保存部分清晰。 Spring Data JPA Async Support
复制所需的任何方法任何帮助?任何人? – SRK