Spring @Transactional wrapping 2 methods

I'm a Spring newby. I use the @Transactional annotation for my dao methods:

@Transactional
public Person getById(long id) {
    return new Person(jdbcTemplate.queryForMap(...));
}

@Transactional
public void save(Person person) {
    jdbcTemplate.update(...);
}

and I've set up the transaction manager like this:

<tx:annotation-driven transaction-manager="txManager" />
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
</bean>

The problem is that when my client code calls dao.save(..)开发者_Python百科 and then dao.getById(4) these happen in two separate transactions. How is it possible to wrap those 2 calls in the same database transaction? Ideally without doing it in a programmatic way.

thanks

It is bad practice to put transactional attributes in DAO layer. Also, I am not sure why do you require transaction for getById method. Even if you want to use transaction then you need to specify propagation behaviour as REQUIRES_NEW for save and getById method.

@Transactional(propagation = REQUIRES_NEW, readOnly = false)
public Person saveAndGetById(Person person, long id) {
    save(person);
    return getById(id);
}

@Transactional(propagation = REQUIRED)
public Person getById(long id) {
    return new Person(jdbcTemplate.queryForMap(...));
}

@Transactional(propagation = REQUIRED, readOnly = false)
public void save(Person person) {
    jdbcTemplate.update(...);
}

However, the best thing would be to have the "save" method return an ID, because it is hard to know beforehand which ID the Person will have once persisted.

Good practice in this case would be marking service method which invokes both these DAO methods as @Transactional. The case was clearly discussed here.