vaadim-app: add uncaught exceptions handler

1 files changed, 24 insertions, 5 deletions

diff --git a/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java b/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
index c516e55..1185f65 100644
--- a/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
+++ b/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
@@ -4,6 +4,7 @@ import java.util.Date;
 
 import com.vaadin.Application;
 import com.vaadin.terminal.UserError;
+import com.vaadin.terminal.Terminal;
 import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.util.ObjectProperty;
@@ -70,6 +71,15 @@ class MainLayout extends VerticalLayout {
                 event.getButton().setComponentError( new UserError("Stop pressing this button !!") );
             }
         }));
+        ///
+        Button exceptionButton = new Button("throw an exception");
+        addComponent(exceptionButton );
+        exceptionButton.addListener( new Button.ClickListener() {
+            @Override
+            public void buttonClick(ClickEvent event) {
+                throw new RuntimeException("Wahou !! : exception");
+            }
+        });
         //
         Button nextButton = new Button("next layout");
         nextButton.setDescription("Go to next layout");
@@ -85,14 +95,23 @@ class MainLayout extends VerticalLayout {
 }
 
 public class HelloWorldApp extends Application {
+    private static final long serialVersionUID = 1L;
 
-	private static final long serialVersionUID = 1L;
-
-	@Override
-	public void init() {
+    @Override
+    public void init() {
         final Window mainWindow = new Window("Hello World Application");
         mainWindow.setContent( new MainLayout() );
         setMainWindow(mainWindow);
         setLogoutURL("http://asynk.ch");
-	}
+    }
+
+    @Override
+    public void terminalError(Terminal.ErrorEvent event) {
+        // Call the default implementation.
+        super.terminalError(event);
+        // Some custom behaviour.
+        if (getMainWindow() != null) {
+            getMainWindow().showNotification("An unchecked exception occured!", event.getThrowable().toString(), Window.Notification.TYPE_ERROR_MESSAGE);
+        }
+    }
 }