@Configuration 去xml化添加事务功能

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###初始化类###

类注解

@Configuration
@ComponentScan(basePackages = AppConfig.BASEPACKAGE,excludeFilters = { 
		@ComponentScan.Filter(type = FilterType.ANNOTATION,value = {Controller.class,RestController.class}) })
public class RootConfiguration {

1.采用注解式事务,需要在类加添加@EnableTransactionManagement

@Bean
    public PlatformTransactionManager transactionManager(DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

2.拦截器式

@Bean(name="transactionManager")
	public DataSourceTransactionManager transactionManager(DataSource dataSource) {
		DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();
		transactionManager.setDataSource(dataSource);
		transactionManager.setGlobalRollbackOnParticipationFailure(false);
		return transactionManager;
	}
	
	@Bean(name="transactionInterceptor")
	public TransactionInterceptor transactionInterceptor(DataSourceTransactionManager transactionManager) {
		TransactionInterceptor transactionInterceptor = new TransactionInterceptor();
		transactionInterceptor.setTransactionManager(transactionManager);
		Properties properties = new Properties();
		properties.setProperty("*","PROPAGATION_required,ISOLATION_DEFAULT,-Exception");
		transactionInterceptor.setTransactionAttributes(properties);
		return transactionInterceptor;
	}
	
	@Bean(name="beanNameAutoProxyCreator")
	public BeanNameAutoProxyCreator beanNameAutoProxyCreator() {
		BeanNameAutoProxyCreator beanNameAutoProxyCreator = new BeanNameAutoProxyCreator();
		beanNameAutoProxyCreator.setProxyTargetClass(true);
		beanNameAutoProxyCreator.setBeanNames("*Service");
		beanNameAutoProxyCreator.setInterceptorNames("transactionInterceptor");
		return beanNameAutoProxyCreator;
	}

###注意事项###

在某个方法依赖另外一个bean时,不可以直接调用生成bean方法。如以上依赖dataSource的地方较多,不可以直接调用dataSource()方法,否则会生成多个实例,导致最后事务不成功,实际使用的可能是实例A,但事务管理到的可能是实例B,从日志中看一切正常,也调用doRollBack的。但在跟踪代码时会发现在TransactionSynchronizationManager.getSynchronizations()返回了两个,分别为:org.mybatis.spring.sqlSessionUtils$sqlSessionSynchronization@ff5c61forg.springframework.jdbc.datasource.DataSourceUtils$ConnectionSynchronization@4545f833。官方文档里面直接调用方法http://docs.spring.io/spring/docs/4.0.x/javadoc-api/org/springframework/transaction/annotation/EnableTransactionManagement.html,不知道是否可以通过什么方式实现这种直接调用

正确的获取方式为:

1.直接通过参数传递需要的依赖

2.参数传递Listablebeanfactory,通过这个获取

原文链接:https://www.f2er.com/xml/295625.html

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