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sâmbătă, 20 iunie 2015

[OmniFaces utilities 2.0] Return the application scope attribute value associated with the given name

[OmniFaces utilities] The getApplicationAttribute() method returns the application scope attribute value associated with the given name.


For example, get the name of the ServletContext attribute which stores the private temporary directory (of type provided by the servlet container for the ServletContext.

·         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. file path: D:\wildfly\standalone\tmp\MyApp.war
  File tempdir = Servlets.getApplicationAttribute(this.getServletContext(), "javax.servlet.context.tempdir");

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

import org.omnifaces.util.Servlets;
// or use, Faces#getServletContext()
ServletContext servletContext = (ServletContext) Faces.getExternalContext().getContext();
// e.g. file path: D:\wildfly\standalone\tmp\MyApp.war
File tempdir = Servlets.getApplicationAttribute(servletContext, "javax.servlet.context.tempdir");

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