事务部分提交或回滚

Question

I am facing some issue with transactions configured in my code. Below is the code with transactions which writes data to DB.

Writer.java

class Writer {

    @Inject
    private SomeDAO someDAO;

    @Transactional(propagation = Propagation.REQUIRES_NEW)
    public void write(){
        this.batchWrite();

    }


    private void batchWrite () {

        try {
            someDAO.writeToTable1(true);
        } catch(Exception ex) {
            someDAO.writeToTable1(false);
        }

        someDAO.writeToTable2();

    }
}

SomeDAO.java

class SomeDAO {

    @Inject
    private JdbcTemplate JdbcTemplate;

    public void writeToTable1(boolean flag) {
        // Writes data to table 1 using jdbcTemplate
        jdbcTemplate.update();
    }


    pulic void writeToTable2() {
        // Writes data to table 2 using jdbcTemplate
        jdbcTemplate.update();
    }

}

Here data is getting stored into table 1 properly but sometimes, table 2 is getting skipped.

I am not sure how this is happening as both the tables have been written within same transaction.

Either transaction is partially committing the data or partially rolling back.

I have doubt that in the SomeDAO class I am injecting JdbcTemplate object which is creating new connection instead of using existing connection of transaction.

Can anyone please help me here?

Answer 1

Try binding a Transaction Manager bean having your jdbcTemplate inside @Transactional:

    //Create a bean
    @Bean
    public PlatformTransactionManager txnManager() throws Exception {
        return new DataSourceTransactionManager(jdbcTemplate().getDataSource());
    }

And then use this transaction manager in @Transactional("txnManager").