Spring MVC - Distributed Database Transaction

Question

I'm currently developing a web application using Spring MVC (without Maven). What I need is to create a distributed transaction between two local databases, so that the code will update all of them in (theoretically) a 2phase commit.

Now, since I'm doing it for a school project, I'm in a simple environment which needs only to take a row from a table in one db and put it in a table on the other db, of course atomically (theoretically, such a transaction should be distributed because I'm using two different databases and not only one).

My question is, how can I deploy a Spring bean that firstly connects to both MySQL databases and then does that distributed transaction? Should I use some external library or could I achieve all with only using the Spring framework? In which case, could you please kindly link me an example or a guide to do this?

Thank you in advance for your help :)

Answer 1

• Spring has an interface PlatformTransactionManager which is an abstraction And it has many implementations like DataSourceTransactionManager,HibernateTransactionManager etc.
• Since you are using distributed transactions so you need to use JTATransactionManager
• These TransactionManagers provided by spring are wrapper around the implementations provided by other frameworks
• Now in case of JTA , you would be using either an application server or a standalone JTA implementation like Atomikos
• Following are the steps :-
• Configure Transaction Manager in spring using application server or standalone JTA implementation
• Enable Transaction Management in spring
• And then configure in your code the @Transactional annotation above your method
• Have a look at following links
• http://docs.spring.io/spring/docs/current/spring-framework-reference/html/transaction.html
• http://www.byteslounge.com/tutorials/spring-jta-multiple-resource-transactions-in-tomcat-with-atomikos-example