Integration

Hi

I need to call a Servlet which is accepting http get request.

My system design is

I have a web service interface that I need to expose to Front end application. I am using Proxy service for this.
Then I have a servlet at end system and using Business service to send request to servlet.
I need to pass username, password, jndi context and payload using url encoding.

What all steps do I need to follow for this? How to create query string , which variable I need to play with inbound or outbound?

I have gone through all the answers on this forum but could not understand much.

Thanks
Vibhor