Web Server (APACHE or OHS) could be used before Web Logic Server in Primavera Application

Hi gurus,
We are in implementation process of Oracle E-Bus Suite 12.1 with other applications like Primavera, OBIEE, Televent etc. etc.

Our present architecture for Primavera application is as follows:
Host: 2.6.39-400.211.1.el6uek.x86_64
Primavera: Version 8.3.1.0

Present architecture:
Clients  -->  WebLogic  --> Database(Oracle)
    1                 2                     3
Explanation: Client talks to Weblogic Server and the Database and P6 Components.

What we want to do is as follows:
Client          [Web Server(APACHE or OHS) ]       Web Logic Server            Database
   1                                 2                                                                    3                                4
We want to install Web Server between Client and Web Logic Server to control routing of client requests.   Is it possible?
If possible, want to find documentation.   Any guidelines how to set up