How to call bean method from url?

[Yuri Ivanov]

Hello all, 

I am new in JSF, I have a simple question.

I need to integrate JSF application with external payment system. This
system can call my url if payment successfully transferred. But I can't
understand how can I define method in back bean that will be called before
rendering response. 

Of course I can write Servlet for handling this situation, but it's not very
convenient for me.

 

Thanks,

Yuri.