Fix the startup error log with FileUploadExecutorManager

core/org.wso2.carbon.ui/src/main/java/org/wso2/carbon/ui/internal/CarbonUIServiceComponent.java

@@ -66,6 +66,7 @@
 import org.wso2.carbon.ui.tracker.AuthenticatorRegistry;
 import org.wso2.carbon.ui.transports.FileDownloadServlet;
 import org.wso2.carbon.ui.transports.FileUploadServlet;
+import org.wso2.carbon.ui.transports.fileupload.FileUploadExecutorManager;
 import org.wso2.carbon.ui.util.UIAnnouncementDeployer;
 import org.wso2.carbon.user.core.service.RealmService;
 import org.wso2.carbon.utils.ConfigurationContextService;
@@ -228,6 +229,14 @@ public void start(BundleContext context) throws Exception {
         uiResourceRegistry.setDefaultUIResourceProvider(
                 uiBundleDeployer.getBundleBasedUIResourcePrvider());
 
+        // Create FileUploadExecutorManager early and register it as an OSGi service
+        // This must be done BEFORE uiBundleDeployer.deploy() so that bundles with 
+        // FileUploadExecutor configurations can be processed properly
+        ConfigurationContext contextForUpload = isLocalTransportMode ? serverConfigContext : clientConfigContext;
+        FileUploadExecutorManager fileUploadExecutorManager = 
+                new FileUploadExecutorManager(context, contextForUpload, webContext);
+        context.registerService(FileUploadExecutorManager.class.getName(), fileUploadExecutorManager, null);
+
         HttpContext commonContext =
                 new CarbonSecuredHttpContext(context.getBundle(), "/web", uiResourceRegistry, registry);
 
@@ -251,12 +260,8 @@ public void start(BundleContext context) throws Exception {
         context.registerService(Servlet.class, fileDownloadServlet, fileDownloadServletProperties);
 
         // Register file upload servlet using HTTP Whiteboard pattern
-        Servlet fileUploadServlet;
-        if (isLocalTransportMode) {
-            fileUploadServlet = new FileUploadServlet(context, serverConfigContext, webContext);
-        } else {
-            fileUploadServlet = new FileUploadServlet(context, clientConfigContext, webContext);
-        }
+        // Use the already-created fileUploadExecutorManager
+        Servlet fileUploadServlet = new FileUploadServlet(context, contextForUpload, webContext, fileUploadExecutorManager);
         Dictionary<String, String> fileUploadServletProperties = new Hashtable<>();
         fileUploadServletProperties.put(HttpWhiteboardConstants.HTTP_WHITEBOARD_SERVLET_PATTERN, 
                 "/carbon/fileupload/*");

core/org.wso2.carbon.ui/src/main/java/org/wso2/carbon/ui/transports/FileUploadServlet.java

@@ -50,6 +50,19 @@ public FileUploadServlet(BundleContext context, ConfigurationContext configCtx,
         this.webContext = webContext;
     }
 
+    /**
+     * Constructor that accepts a pre-created FileUploadExecutorManager.
+     * This is used when the manager needs to be registered as an OSGi service before
+     * bundle deployment occurs.
+     */
+    public FileUploadServlet(BundleContext context, ConfigurationContext configCtx, 
+                             String webContext, FileUploadExecutorManager executorManager) {
+        this.bundleContext = context;
+        this.configContext = configCtx;
+        this.webContext = webContext;
+        this.fileUploadExecutorManager = executorManager;
+    }
+
     protected void doPost(HttpServletRequest request,
                           HttpServletResponse response) throws ServletException, IOException {
 
@@ -71,9 +84,12 @@ protected void doGet(HttpServletRequest req, HttpServletResponse res)
     public void init(ServletConfig servletConfig) throws ServletException {
         this.servletConfig = servletConfig;
         try {
-            fileUploadExecutorManager = new FileUploadExecutorManager(bundleContext, configContext, webContext);
-            //Registering FileUploadExecutor Manager as an OSGi service
-            bundleContext.registerService(FileUploadExecutorManager.class.getName(), fileUploadExecutorManager, null);
+            // Only create a new FileUploadExecutorManager if one wasn't provided via constructor
+            if (fileUploadExecutorManager == null) {
+                fileUploadExecutorManager = new FileUploadExecutorManager(bundleContext, configContext, webContext);
+                //Registering FileUploadExecutor Manager as an OSGi service
+                bundleContext.registerService(FileUploadExecutorManager.class.getName(), fileUploadExecutorManager, null);
+            }
         } catch (CarbonException e) {
             log.error("Exception occurred while trying to initialize FileUploadServlet", e);
             throw new ServletException(e);
@@ -83,4 +99,4 @@ public void init(ServletConfig servletConfig) throws ServletException {
     public ServletConfig getServletConfig() {
         return this.servletConfig;
     }
-}
+}