Question

我正在研究在Swing应用程序上使用Spring的可能性，应用MVC概念。

现在我正在尝试创建一个@Transactional方法，但它不会启动事务。

这是我的代码：

@Component
public class MainFormController {

    @Autowired
    private MainFormFrameView view;

    @Autowired
    private MyService service;

    public MainFormController() {
    view.button.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            doSomethingInTransaction();
        }
    });
    }

    @Transactional
    public void doSomethingInTransaction() {
        if (!TransactionSynchronizationManager.isActualTransactionActive()) {
           throw new IllegalStateException("No active transaction!!!!");
        }
        service.doSomethingOverTheTransaction();
    }
}

这是我的配置：

@Configuration
@ComponentScan(basePackages = "br.com.jjw.pdv")
@EnableTransactionManagement
public class AppContextConfiguration {

    @Bean
    public DataSource dataSource() throws PropertyVetoException {
        ComboPooledDataSource ret = new ComboPooledDataSource();

        ret.setDriverClass(jdbcDriver.class.getName());
        ret.setJdbcUrl("jdbc:hsqldb:file:dados.hsql");
        ret.setUser("sa");
        ret.setPassword("");

        return ret;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() throws PropertyVetoException {
        LocalContainerEntityManagerFactoryBean ret = new LocalContainerEntityManagerFactoryBean();
        ret.setDataSource(dataSource());
        ret.setJpaDialect(jpaDialect());

        EclipseLinkJpaVendorAdapter adapter = new EclipseLinkJpaVendorAdapter();
        adapter.setDatabase(Database.HSQL);

        ret.setJpaVendorAdapter(adapter);
        ret.setPersistenceXmlLocation("classpath:META-INF/persistence.xml");
        ret.setPersistenceUnitName("jjw-pdv-unit");
        ret.setLoadTimeWeaver(new InstrumentationLoadTimeWeaver());

        return ret;
    }

    @Bean
    public JpaDialect jpaDialect() {
        return new EclipseLinkJpaDialect();
    }

    @Bean
    public PersistenceAnnotationBeanPostProcessor persistenceAnnotationBeanPostProcessor() {
        return new PersistenceAnnotationBeanPostProcessor();
    }

    @Bean
    public JpaTransactionManager transactionManager() throws PropertyVetoException {
        JpaTransactionManager ret = new JpaTransactionManager();
        ret.setEntityManagerFactory(entityManagerFactory().getNativeEntityManagerFactory());
        ret.setJpaDialect(jpaDialect());
        return ret;
    }

}

当我点击按钮时，doSomethingInTransaction（）方法引发了我的异常：

 IllegalStateException("No active transaction!!!!");

为什么？

Answer 1

Spring AOP是基于代理的，不建议内部调用。

您需要在弹簧提供的代理上进行调用，例如

 SomeTransactionalBean bean = 
           applicationContext.getBean(SomeTransactionalBean.class);

 bean.doSomethingInTrasanction();

例如，将@Transactional注释放在服务方法上。

Swing + Spring + @Transactional =没有启动交易

1 个答案: