I'm trying to call a servlet plugin(hosted in SSO) using a java client , htt

No manual intervention, I meant you can gather information by looking at the HTML/JavaScript code in the SSO login page, and see what needs to be included in the POST request (HTML form) to the target URL when a user is logging in. You can use HTTP debugging tools available in Chrome or Firefox for this.

Then you can use HttpClient in your code to send that same POST request (with credentials you received from process) to the same target URL, so that the HttpClient will receive the cookies. After that, when you use the same HttpClient to invoke the target Servlet, it will get through within getting the login screen again.

No manual intervention, I meant you can gather information by looking at the HTML/JavaScript code in the SSO login page, and see what needs to be included in the POST request (HTML form) to the target URL when a user is logging in. You can use HTTP debugging tools available in Chrome or Firefox for this.

Then you can use HttpClient in your code to send that same POST request (with credentials you received from process) to the same target URL, so that the HttpClient will receive the cookies. After that, when you use the same HttpClient to invoke the target Servlet, it will get through within getting the login screen again.