1 files changed, 14 insertions, 1 deletions
diff --git a/server/src/com/vaadin/server/communication/FileUploadHandler.java b/server/src/com/vaadin/server/communication/FileUploadHandler.java
index e9569d45a1..3f6bfd9267 100644
--- a/server/src/com/vaadin/server/communication/FileUploadHandler.java
+++ b/server/src/com/vaadin/server/communication/FileUploadHandler.java
@@ -38,6 +38,7 @@ import com.vaadin.server.VaadinResponse;
 import com.vaadin.server.VaadinSession;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.UI;
+import com.vaadin.ui.Upload.FailedEvent;
 
 /**
  * Handles a file upload request submitted via an Upload component.
@@ -197,7 +198,19 @@ public class FileUploadHandler implements RequestHandler {
         }
     }
 
-    private static class UploadInterruptedException extends Exception {
+    /**
+     * An UploadInterruptedException will be thrown by an ongoing upload if
+     * {@link StreamVariable#isInterrupted()} returns <code>true</code>.
+     * 
+     * By checking the exception of an {@link StreamingErrorEvent} or
+     * {@link FailedEvent} against this class, it is possible to determine if an
+     * upload was interrupted by code or aborted due to any other exception.
+     */
+    public static class UploadInterruptedException extends Exception {
+
+        /**
+         * Constructs an instance of <code>UploadInterruptedException</code>.
+         */
         public UploadInterruptedException() {
             super("Upload interrupted by other thread");
         }