How to create tests to simulate concurrent updates

[GDW]

Can anyone provide me with guidance on how to create tests to simulate concurrent updates in order to test transaction isolation? I'm using Spring 1.2.8 & Hibernate 3.1.3.

Thx,
Gary

[karldmoore]

I would have a look at the Spring testing references, I think it would be possible to do updates in different transactions and perform your tests.

http://www.springframework.org/docs/...e/testing.html
http://www.springframework.org/docs/...tml#testing-tx
http://www.springframework.org/docs/...textTests.html

[GDW]

Thanks for the response.

I have looked at that documentation and it appears that Spring does provide some of the building blocks for transactional testing but the important piece that I don't see is how to cause 2 simultanteous updates to the same object. It seems to me that some type of multithreaded mechanism would be needed to do this.

I have had a couple of recommendations on another list that look promising. One person suggested using multithreaded JUnit extensions (http://www.junit.org/news/extension/threaded/index.htm). Someone else suggested using load testing tools such as WAPT, Grinder and TestNG. I've looked briefly at the load testing tools and haven't had a chance to look at the JUnit extensions yet so I still don't have a firm solution at this point.

I don't have a great deal of time to devote to researching the various options because of a tight schedule. I was hoping that this is a scenario that is commonly encountered and that there would be a ready answer but I guess that's not the case.

Thanks again,
Gary

[karldmoore]

A co-worker also suggested JUnit extensions might be worth looking at!