Fix FacesServletFactory

impl/src/main/java/com/sun/faces/config/configpopulator/MojarraRuntimePopulator.java

@@ -1,17 +1,22 @@
 package com.sun.faces.config.configpopulator;
 
+import jakarta.faces.application.ApplicationConfigurationPopulator;
+
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 
-import jakarta.faces.application.ApplicationConfigurationPopulator;
-
 public final class MojarraRuntimePopulator extends ApplicationConfigurationPopulator {
     @Override
     public void populateApplicationConfiguration(Document toPopulate) {
         String ns = toPopulate.getDocumentElement().getNamespaceURI();
         Element faces_configElement = toPopulate.getDocumentElement();
         {
             Element factoryElement = toPopulate.createElementNS(ns, "factory");
+            {
+                Element faces_servlet_factoryElement = toPopulate.createElementNS(ns, "faces-servlet-factory");
+                faces_servlet_factoryElement.appendChild(toPopulate.createTextNode("com.sun.faces.webapp.FacesServletFactoryImpl"));
+                factoryElement.appendChild(faces_servlet_factoryElement);
+            }
             {
                 Element application_factoryElement = toPopulate.createElementNS(ns, "application-factory");
                 application_factoryElement.appendChild(toPopulate.createTextNode("com.sun.faces.application.ApplicationFactoryImpl"));

impl/src/main/java/com/sun/faces/config/processor/FactoryConfigProcessor.java

@@ -28,6 +28,10 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import jakarta.faces.FactoryFinder;
+import jakarta.faces.context.FacesContext;
+import jakarta.servlet.ServletContext;
+
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
@@ -39,10 +43,6 @@
 import com.sun.faces.context.InjectionFacesContextFactory;
 import com.sun.faces.util.FacesLogger;
 
-import jakarta.faces.FactoryFinder;
-import jakarta.faces.context.FacesContext;
-import jakarta.servlet.ServletContext;
-
 /**
  * <p>
  * This <code>ConfigProcessor</code> handles all elements defined under <code>/faces-config/factory</code>.
@@ -57,6 +57,11 @@ public class FactoryConfigProcessor extends AbstractConfigProcessor {
      */
     private static final String FACTORY = "factory";
 
+    /**
+     * <code>faces-config/factory/faces-servlet-factory</code>
+     */
+    private static final String FACES_SERVLET_FACTORY = "faces-servlet-factory";
+
     /**
      * <code>/faces-config/factory/application-factory</code>
      */
@@ -135,7 +140,7 @@ public class FactoryConfigProcessor extends AbstractConfigProcessor {
     /**
      * <code>Array of Factory names for post-configuration validation.</code>
      */
-    private final List<String> factoryNames = asList(FactoryFinder.APPLICATION_FACTORY, FactoryFinder.CLIENT_WINDOW_FACTORY,
+    private final List<String> factoryNames = asList(FactoryFinder.FACES_SERVLET_FACTORY, FactoryFinder.APPLICATION_FACTORY, FactoryFinder.CLIENT_WINDOW_FACTORY,
             FactoryFinder.EXCEPTION_HANDLER_FACTORY, FactoryFinder.EXTERNAL_CONTEXT_FACTORY, FactoryFinder.FACES_CONTEXT_FACTORY, FactoryFinder.FLASH_FACTORY,
             FactoryFinder.LIFECYCLE_FACTORY, FactoryFinder.VIEW_DECLARATION_LANGUAGE_FACTORY, FactoryFinder.PARTIAL_VIEW_CONTEXT_FACTORY,
             FactoryFinder.RENDER_KIT_FACTORY, FactoryFinder.VISIT_CONTEXT_FACTORY, FactoryFinder.FACELET_CACHE_FACTORY,
@@ -204,8 +209,11 @@ private void processFactories(NodeList factories, String namespace, AtomicIntege
             for (int c = 0, csize = children.getLength(); c < csize; c++) {
                 Node childNode = children.item(c);
                 switch (childNode.getLocalName()) {
+                case FACES_SERVLET_FACTORY:
+                    setFactory(FactoryFinder.FACES_SERVLET_FACTORY, getNodeText(childNode));
+                    break;
                 case APPLICATION_FACTORY:
-                    int cnt = appCount.incrementAndGet();
+                    appCount.incrementAndGet();
                     setFactory(FactoryFinder.APPLICATION_FACTORY, getNodeText(childNode));
                     break;
                 case EXCEPTION_HANDLER_FACTORY:

impl/src/main/java/com/sun/faces/webapp/FacesServletFactoryImpl.java

@@ -16,10 +16,13 @@
  */
 package com.sun.faces.webapp;
 
+import java.util.HashMap;
+
+import jakarta.faces.FacesException;
 import jakarta.faces.webapp.FacesServletFactory;
 import jakarta.servlet.Servlet;
 import jakarta.servlet.ServletConfig;
-import java.util.HashMap;
+import jakarta.servlet.ServletException;
 
 /**
  * The implementation of the FacesServletFactory.
@@ -37,8 +40,13 @@ public class FacesServletFactoryImpl extends FacesServletFactory {
     public Servlet getFacesServlet(ServletConfig config) {
         Servlet servlet = servlets.get(config);
         if (servlet == null) {
-            servlets.put(config, servlet);
             servlet = new FacesServletImpl();
+            try {
+                servlet.init(config);
+            } catch (ServletException e) {
+                throw new FacesException(e);
+            }
+            servlets.put(config, servlet);
         }
         return servlet;
     }