How to make a web service in java that can be called by multiple users

Question

I have a simple Web service in Java and Weblogic. In this web service, I have a method which receive some data, call another webservice, write in DB and then answer with result.

If I try it with only one call it works fine, but, if I've tried with Soap UI, creating a TestCase, where you can call the web service in multiple threads, sometimes, it works ok, but sometimes, when there are a call in the middle of another, the result is not correct.

The problem is that when I call web service method I init some variables I have to analyze and save in DB, so, if a call is interrupted, these variables are updated and when the first call finish, the result is not correct (they are with init values).

If I put synchronized in web service method it works, but I think it's not the best way to do it, because I want to allow multiple users at the same time.

What's is the best way to do this?

Thank you very much

Answer 1

when you start writing client specific applications, you're required to keep a data for client state in your DB. So, when each client accesses your web server with their cookie/session, you can get the client-id (encrypted in side cookie/session) and evaluate server-side parameters based on values of client in DB.

Answer 2

谢谢kolossus的评论，我已经解决了它删除全局变量并仅创建局部变量的问题，因此每次调用都将创建一个新变量而不覆盖公共变量。