带有2个事务管理器的@EnableTransactionManagement注释 [英] @EnableTransactionManagement annotation with 2 transaction managers

问题描述

我使用 @Configuration 注释来配置spring而不是xml文件。我正在配置具有不同会话工厂和不同事务管理器的2个数据源。我在这里遇到了一个问题 @EnableTransactionManagement 注释。我在其文档中读到，

I am using @Configuration annotation for configuration of spring instead of xml file. I am configuring 2 datasources with different session factory and different transaction managers. I am stuck with a problem here for @EnableTransactionManagement annotation. I read in its documentation that,

@EnableTransactionManagement 更灵活;对于
容器中的任何 PlatformTransactionManager bean，它将回退到
by-type查找。因此，名称可以是txManager，transactionManager或
tm：它无关紧要。

@EnableTransactionManagement is more flexible; it will fall back to a by-type lookup for any PlatformTransactionManager bean in the container. Thus the name can be "txManager", "transactionManager", or "tm": it simply does not matter.

这意味着我给方法的任何名称，它总是会搜索返回 PlatformTransactionManager 对象的方法，而我有2个transactionmanagers。现在的问题是，当我测试这个类时，它给了我错误：

This means whatever name I give to method, it will always search for the method which returns PlatformTransactionManager object while I have 2 transactionmanagers. Now the problem is, when I test this class, it gives me error:

org.springframework.beans。 factory.NoSuchBeanDefinitionException ：没有定义类型为[ org.springframework.transaction.PlatformTransactionManager ]的唯一bean：期望的单个bean但找到2

org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [org.springframework.transaction.PlatformTransactionManager] is defined: expected single bean but found 2

我甚至试图拥有2个不同的配置类但是徒劳无功。在xml配置中，情况并非如此。我在两个交易管理器上注册了两个< tx：annotation-driven transaction-manager =/> 标签，它运行正常。但是这里不能用注释做同样的事情。

I even tried to have 2 different Configuration classes but in vain. In xml configuration, this was not the case. I registered my both transaction managers with two <tx:annotation-driven transaction-manager="" /> tag and it worked fine. But not able to do same here with annotations.

如果我想在Spring注释配置类中配置2个具有2个不同事务管理器的数据源，我该怎么办？

What should I do if I want to configure 2 datasources with 2 different transaction managers in Spring annotated configuration class?

推荐答案

在配置类中，使用 @EnableTransactionManagement 注释。

In your configuration class, use @EnableTransactionManagement annotation.

在此类中定义一个事务管理器：

Define a transaction manager in this class as:

    @Bean(name="txName")
    public HibernateTransactionManager txName() throws IOException{
        HibernateTransactionManager txName= new HibernateTransactionManager();
        txName.setSessionFactory(...);
        txName.setDataSource(...);
        return txName;
   }

在您的类/方法中执行交易作业，注释如下：

There on, in your class/method that executes transactional job(s), annotate as follows:

@Transactional("txName")

或

@Transactional(value = "txName")

这就是如何将名称限定的事务管理器绑定到您需要的位置。您现在可以拥有任意数量的事务管理器，并根据需要随时使用它。

This is how you would tie a name qualified transaction manager to wherever you need it. You can now have as many transaction managers as you want and use it accordingly wherever you need.

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