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[OmniFaces Utilities] - Find the right JSF OmniFaces 2 utilities methods/functions

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sâmbătă, 20 iunie 2015

[OmniFaces utilities 2.0] Return true if the given HTTP servlet request is a JSF ajax request

[OmniFaces utilities] The isFacesAjaxRequest() method returns true if the given HTTP servlet request is a JSF ajax request. This does exactly the same as Faces#isAjaxRequest(), but then without the need for a FacesContext. The major advantage is that you can perform the job inside a servlet filter, where the FacesContext is normally not available.


·         inside a servlet filter or even a plain vanilla servlet (basically, when FacesContext is not available):

import org.omnifaces.util.Servlets;
public class MyServlet extends HttpServlet {
 protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // e.g. false
  boolean isFacesAjaxRequest = Servlets.isFacesAjaxRequest(request);

·         in JSF, when FacesContext is available use, Faces#isAjaxRequest(), or more clumsy (not recommended):

import org.omnifaces.util.Servlets;
// or simply use, Faces#getRequest()
FacesContext context = FacesContext.getCurrentInstance();
ExternalContext externalContext = context.getExternalContext();
HttpServletRequest request = (HttpServletRequest) externalContext.getRequest();

boolean isFacesAjaxRequest = Servlets.isFacesAjaxRequest(request);

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