Java Spring@Transactional只读

我有一个基本的SpringBoot应用程序。使用Spring初始值设定项、嵌入式Tomcat、Thymeleaf模板引擎和作为可执行JAR文件的包

具有这种依赖性

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

JPA地产：

spring.datasource.url=jdbc:h2:mem:testdb;MODE=MySQL;DB_CLOSE_ON_EXIT=FALSE
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
hibernate.dialect=org.hibernate.dialect.H2Dialect

bean调用transactional=read-only Bean1，它执行查找和 调用transactional=read-write Bean2以保存新对象

没有向数据库提交任何内容

现在将Bean2@Transactional注释更改为添加 传播=传播。需要新的

除非您做出如下所示，否则它将持续存在

    @Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW)
    public void createTimeLapse (TimeLapse timeLapse)
   { 
    timeLapseRepository.save (timeLapse); 
   } 

---

您是如何检查您是否有新记录的，您是否在不同的事务中看到它（例如从您的DB客户端）？还可以添加您拥有的jpa配置。可能是方法级别u重写类级别事务。为什么不尝试重写save方法的readonly，如this@Transactional（readOnly=false，propagation=propagation.REQUIRES_NEW）public void createTimeLapse（TimeLapse-TimeLapse）{timeLapseRepository.save（TimeLapse）；}这里解释得很清楚

timeLapseService.createTimeLapse(timeLapse24h);

spring.datasource.url=jdbc:h2:mem:testdb;MODE=MySQL;DB_CLOSE_ON_EXIT=FALSE
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
hibernate.dialect=org.hibernate.dialect.H2Dialect

> Bean1 starts a read-only tx. 31 09:39:44.199 [pool-1-thread-1] DEBUG
> o.s.orm.jpa.JpaTransactionManager - Creating new transaction with name
> [nz.co.vodafone.wcim.business.Bean1.startSomething]:
> PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''

> 
> Bean 2 pariticipates in it. 31 09:39:44.230 [pool-1-thread-1] DEBUG
> o.s.orm.jpa.JpaTransactionManager - Participating in existing
> transaction
> 

> Bean1 starts a read-only tx. 31 09:31:36.418 [pool-1-thread-1] DEBUG
> o.s.orm.jpa.JpaTransactionManager - Creating new transaction with name
> [nz.co.vodafone.wcim.business.Bean1.startSomething]:
> PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''
> 
> Bean2 starts a new read-write tx 31 09:31:36.449 [pool-1-thread-1]
> DEBUG o.s.orm.jpa.JpaTransactionManager - Suspending current
> transaction, creating new transaction with name

    @Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW)
    public void createTimeLapse (TimeLapse timeLapse)
   { 
    timeLapseRepository.save (timeLapse); 
   }