Concurrency with web services in a application

[sumukh_death]

Hello,
I need some help in designing a standalone application with a

public static void main. as start point and uses no threads as such to communicate with jax-rpc encoded web services. This application makes many calls to web services before it exists.

But I am running into trouble to find the best way to ensure that no two calls overlaps. Since most of the methods being written are static methods.

People may call this executable jar more than once and may also overlap. But in each case integrity of the application should be maintained.

Any help will be greatly appreciated.

Libraries used. Axis 1.4, JAXRPC, SAAJ.
-Su

[Norm]

ensure that no two calls overlaps

If the methods only use local variables, I don't think there is a problem with more than one thread executing a method concurrently. Each thread should have its own local variables. There should not be any static variables.

[sumukh_death]

Makes sense. So if I am right, I need to remove all the singletons beans and inject all the Singleton beans to other corresponding classes which calls web services.

One other thing. The Handlers which will call webservices should they be static or singletons. To keep reusing their instances.

[Norm]

Sorry, I don't know anything about the bean code you are talking about. I thought that singletons used static variables.