Ajuda Struts 2

package br.com.dnasolution.site.interceptor;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;

public class LoginUsuarioInterceptor implements Interceptor {

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

	@Override
	public void init() {
		// TODO Auto-generated method stub

	}

	@Override
	public String intercept(ActionInvocation invocation) throws Exception {
		if(invocation.getInvocationContext().getSession().get("usuarioLogado") != null){
			return invocation.invoke();
		}else{
			return "usuarioNaoLogado";
		}
	}

}

package br.com.dnasolution.site.interceptor;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;

public class LoginClienteInterceptor implements Interceptor {

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

	@Override
	public void init() {
		// TODO Auto-generated method stub

	}

	@Override
	public String intercept(ActionInvocation invocation) throws Exception {
		if(invocation.getInvocationContext().getSession().get("clienteLogado") != null){
			return invocation.invoke();
		}else{
			return "clienteNaoLogado";
		}
	}

}

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts>
	<package name="my-secure"
			 extends="convention-default">
		<interceptors>
			<interceptor name="loginUsuarioInterceptor"
						 class="br.com.dnasolution.site.interceptor.LoginUsuarioInterceptor">
			</interceptor>
			<interceptor name="loginClienteInterceptor"
						 class="br.com.dnasolution.site.interceptor.LoginClienteInterceptor">
			</interceptor>
			<interceptor-stack name="secureStack">
				<interceptor-ref name="defaultStack"/>
				<interceptor-ref name="loginClienteInterceptor"/>
				<interceptor-ref name="loginUsuarioInterceptor"/>
			</interceptor-stack>
		</interceptors>

		<default-interceptor-ref name="secureStack"/>

		<global-results>
			<result name="clienteNaoLogado">/jsp/usuario/loginUsuario.jsp
			</result>
			<result name="clienteNaoLogado">/jsp/cliente/loginCliente.jsp
			</result>
		</global-results>

	</package>
</struts>

package br.com.dnasolution.site.action;

@ParentPackage("my-secure")
public class OrdemServicoAction {

@Action(value = "cadastrarOrdemServico", results = {
			@Result(name = "valido", location = "/jsp/ordemservico/cadastro_sucesso.jsp"),
			@Result(name = "invalido", location = "/jsp/ordemservico/cadastro_falha.jsp") }, interceptorRefs = { @InterceptorRef("loginClienteInterceptor") })
	public String cadastrarOrdemServico() {
		try {
			TbProjeto projetoOS = projetoService
					.getProjetoById(this.cdProjetoOS);
			TbTopicoOs topicoOs = topicoOsService.getTopicoById(cdTopicoOS);
....
}}