what is the correct way to access drools programs in restful web service?

type Exception report

message org.glassfish.jersey.server.ContainerException: java.lang.NoClassDefFoundError: org/kie/api/Service

description The server encountered an internal error that prevented it from fulfilling this request.

exception javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: java.lang.NoClassDefFoundError: org/kie/api/Service