Prevention of Data Corruption in Servlets?

[Maan Suraj]

I would like to know how can we prevent data corruptionn in servlets in real time scenarios. For example i have a servlet, and it may handle mulitple requests through multiple threads, so how can i prevent data corruption. May be through synchronization of doGet() method, but then there are limitaions with it, also Single thhread model do have limitations. So could any one tell me how to handle such scennarios? Any API is available?

[Ankit Garg]

What type of data corruption are you talking about??

[David Newton]

Do you actually *have* any data corruption?

[Mark E Hansen]

What data are you talking about?

If you have instance variables in the servlet, they will be shared across all requests, so you will want to synchronize your access to them. However, if you keep your state information in the session, then each client/session will have their own copy. You can still run into trouble if the same client makes two simultaneous requests (say from two separate browser windows), but this isn't as likely.

Chapter 3 (Servlet Basics) of the book Core Servlets and JavaServer Pages, which is available in PDF format here: http://pdf.coreservlets.com/Servlet-Basics.pdf goes into details about the pitfalls of using the SingleThreadModel interface and how and when to properly synchronize your code.

Best Regards,