May 2015
Intermediate to advanced
234 pages
4h 18m
English
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Reverting incomplete database modifications using transactions
Some database modifications involve several SQL queries, for example, inserting an object with attributes spread across several tables. If one of the queries fails, we would want to undo any previous ones that were successful.
How to do it…
Here are the steps to make DAO methods transactional:
- Add
@EnableTransactionManagementto the Spring configuration class:@Configuration @EnableWebMvc @EnableTransactionManagement @ComponentScan(basePackages = {"com.spring_cookbook.controllers", "com.spring_cookbook.dao"}) public class AppConfig { … - Add a
DataSourceTransactionManagerbean to the Spring configuration:@Bean public DataSourceTransactionManager transactionManager() { DataSourceTransactionManager ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.