Invoke Rest webservice during checkin process in WebCenter Content to notify successful checkin to s

Hello Experts,

Using WebCenter content 12c 12.2.1.3.0, Siebel IP2016.

Requirement:

we have enabled the Siebel Adapter to integrate with WCC System but we need to notify the siebel system on successful checkin of document in wcc via calling the siebel Rest service. to achieve this follow the below steps but getting the below error. please advise how to solve this.

Steps:

I am attempting to set up WebCenter Content to invoke a Rest API Web Service during the check-in of document in WCC to update/Notify the Siebel system of successful document checkin in WCC. For this to occur, I have created a Java class which implements the FilterImplementor interface. In the doFilter method, I am invoking the Rest API service using http client, but it's not taking the required Jar Reference and getting the error classdef not found exception.