Please take the below:
String theURL = getUrlByPageName(pageName);
log.info(".... The URL for report link: <"+theURL+">.");
FacesContext faces = FacesContext.getCurrentInstance();
ExternalContext context = faces.getExternalContext();
HttpServletResponse response = (HttpServletResponse)context.getResponse();
response.sendRedirect(theURL);
add a <redirect/> tag to your navigation rules in faces config:
<navigation-rule>
<navigation-case>
<from-outcome>Entry</from-outcome>
<to-view-id>/jsf/entry.jsp</to-view-id>
<redirect/>
</navigation-case>
</navigation-rule>