Spring 事务传播行为实验

一、Propagation ：

key属性确定代理应该给哪个方法增加事务行为。这样的属性最重要的部份是传播行为。有以下选项可供使用：

PROPAGATION_REQUIRED--支持当前事务，如果当前没有事务，就新建一个事务。这是最常见的选择。
PROPAGATION_SUPPORTS--支持当前事务，如果当前没有事务，就以非事务方式执行。
PROPAGATION_MANDATORY--支持当前事务，如果当前没有事务，就抛出异常。
PROPAGATION_REQUIRES_NEW--新建事务，如果当前存在事务，把当前事务挂起。
PROPAGATION_NOT_SUPPORTED--以非事务方式执行操作，如果当前存在事务，就把当前事务挂起。
PROPAGATION_NEVER--以非事务方式执行，如果当前存在事务，则抛出异常。

PROPAGATION_NESTED -- 而Nested的事务和他的父事务是相依的，他的提交是要等和他的父事务一块提交的。也就是说，如果父事务最后回滚，他也要回滚的。

二，代码清单

Mysql 表，

CREATE TABLE `account` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `name` varchar(20) NOT NULL,
   `money` double DEFAULT NULL,
   PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8

初始数据：

aaa 1000

bbb 1000

ccc 1000

public interface InnerService {
    void InnerTransfer(String from, String to, double money);
}

@Service
public class InnerServiceImpl implements InnerService {

    @Autowired
    MyDao myDao;

    @Transactional(propagation = Propagation.MANDATORY)
    public void InnerTransfer(final String from, final String to, final double money) {
        myDao.In(to, money);
//        int a = 1 / 0;
        myDao.Out(from, money);
    }
}

public interface OuterService {
    void OuterTransfer();
}

@Service
public class OuterServiceImpl implements OuterService {

    @Autowired
    InnerService innerService;

    @Autowired
    MyDao myDao;

    public void OuterTransfer() {

        myDao.In("ccc", 19);

        innerService.InnerTransfer("aaa", "bbb", 100d);

        int a = 1 / 0;
    }
}

public interface MyDao {

    void In(String user, double money);

    void Out(String user, double money);
}

@Repository
public class MyDaoImpl extends JdbcDaoSupport implements MyDao {
    @Autowired
    private DataSource dataSource;

    @PostConstruct
    private void initialize() {
        setDataSource(dataSource);
    }

    public void In(String user, double money) {
        String sql = "update account set money = money + " + money + " where name='" + user + "'";

        this.getJdbcTemplate().update(sql);
    }

    public void Out(String user, double money) {
        String sql = "update account set money = money - ?   where name=?";

        this.getJdbcTemplate().update(sql, money, user);
    }
  
}

配置文件略。

三、事务

OuterTransfer	InnerTransfer	事务结果	aaa	bbb	ccc
	MANDATORY
	NOT_SUPPORTED
	SUPPORTS
	REQUIRES_NEW
	REQUIRED
	NEVER
	NESTED
MANDATORY
MANDATORY	MANDATORY
MANDATORY	NOT_SUPPORTED
MANDATORY	SUPPORTS
MANDATORY	REQUIRES_NEW
MANDATORY	REQUIRED
MANDATORY	NEVER
MANDATORY	NESTED
NOT_SUPPORTED
NOT_SUPPORTED	MANDATORY
NOT_SUPPORTED	NOT_SUPPORTED
NOT_SUPPORTED	SUPPORTS
NOT_SUPPORTED	REQUIRES_NEW
NOT_SUPPORTED	REQUIRED
NOT_SUPPORTED	NEVER
NOT_SUPPORTED	NESTED
SUPPORTS
SUPPORTS	MANDATORY
SUPPORTS	NOT_SUPPORTED
SUPPORTS	SUPPORTS
SUPPORTS	REQUIRES_NEW
SUPPORTS	REQUIRED
SUPPORTS	NEVER
SUPPORTS	NESTED
REQUIRES_NEW
REQUIRES_NEW	MANDATORY
REQUIRES_NEW	NOT_SUPPORTED
REQUIRES_NEW	SUPPORTS
REQUIRES_NEW	REQUIRES_NEW
REQUIRES_NEW	REQUIRED
REQUIRES_NEW	NEVER
REQUIRES_NEW	NESTED
REQUIRED
REQUIRED	MANDATORY
REQUIRED	NOT_SUPPORTED
REQUIRED	SUPPORTS
REQUIRED	REQUIRES_NEW
REQUIRED	REQUIRED
REQUIRED	NEVER
REQUIRED	NESTED
NEVER
NEVER	MANDATORY
NEVER	NOT_SUPPORTED
NEVER	SUPPORTS
NEVER	REQUIRES_NEW
NEVER	REQUIRED
NEVER	NEVER
NEVER	NESTED
NESTED
NESTED	MANDATORY
NESTED	NOT_SUPPORTED
NESTED	SUPPORTS
NESTED	REQUIRES_NEW
NESTED	REQUIRED
NESTED	NEVER
NESTED	NESTED