Spring从配置java文件禁用@Transactional

Question

@Configuration
@EnableTransactionManagement
@PropertySource("classpath:application.properties")

public class WebAppConfig {

    private static final String PROPERTY_NAME_DATABASE_DRIVER = "db.driver";

    @Resource
    private Environment env;

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(env.getRequiredProperty(PROPERTY_NAME_DATABASE_DRIVER));
        dataSource.setUrl(url);
        dataSource.setUsername(userId);
        dataSource.setPassword(password);

        return dataSource;
    }
    @Bean
    public PlatformTransactionManager txManager() {
         DefaultTransactionDefinition def = new DefaultTransactionDefinition();
         def.setIsolationLevel(TransactionDefinition.ISOLATION_DEFAULT);
            if(appName.equqls("ABC")) {
                def.setPropagationBehavior(TransactionDefinition.PROPAGATION_NEVER);
                }else {
                    def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
                }
         CustomDataSourceTransactionManager txM=new CustomDataSourceTransactionManager(def);
         txM.setDataSource(dataSource());
    return txM;
    }


    @Bean
    public JdbcTemplate jdbcTemplate() {
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(dataSource());
        return jdbcTemplate;
    }

}

如果我保留@transactional(propagation=propagation.never)，那么所有的东西都可以很好地工作，但是我不能修改它，因为另一个应用程序正在使用相同的代码库，在这种情况下，它是必要的。

我想知道是否有一个使事务从配置完全禁用而不修改@transactional注释。

Answer 1

我不确定它是否可行，但您可以尝试实现自定义TransactionInterceptor并通过删除事务性内容来覆盖它的方法，该方法将调用包装到事务中。类似这样的事情：

public class NoOpTransactionInterceptor extends TransactionInterceptor {

    @Override
    protected Object invokeWithinTransaction(
        Method method, 
        Class<?> targetClass, 
        InvocationCallback invocation
    ) throws Throwable {
        // Simply invoke the original unwrapped code
        return invocation.proceedWithInvocation();
    }
}

然后在@configuration类中声明一个条件bean

// assuming this property is stored in Spring application properties file
@ConditionalOnProperty(name = "turnOffTransactions", havingValue = "true")) 
@Bean   
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
public TransactionInterceptor transactionInterceptor(
         /* default bean would be injected here */
         TransactionAttributeSource transactionAttributeSource
) {
    TransactionInterceptor interceptor = new NoOpTransactionInterceptor();
    interceptor.setTransactionAttributeSource(transactionAttributeSource);
    return interceptor;
}

也许你需要更多的配置，我现在无法确认