RedirectController into auto config as default and null pointer fix. (#621)

* Vaadin patch and redirect controller to auto config.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fix potential null pointer.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* revert Vaadin update.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Conditional on missing bean.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fix on permission checks.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fix permission checks.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fix nested cascade on delete.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

hawkbit-autoconfigure/src/main/java/org/eclipse/hawkbit/autoconfigure/mgmt/ui/MgmtUiAutoConfiguration.java

@@ -31,7 +31,7 @@ import org.vaadin.spring.security.annotation.EnableVaadinSecurity;
 import com.vaadin.spring.annotation.UIScope;
 
 /**
- * The hawkbit-ui autoconfiguration.
+ * The Management UI auto configuration.
  */
 @Configuration
 @EnableVaadinSecurity
@@ -41,13 +41,19 @@ import com.vaadin.spring.annotation.UIScope;
 @Import(MgmtUiConfiguration.class)
 public class MgmtUiAutoConfiguration {
 
+    @Bean
+    @ConditionalOnMissingBean
+    RedirectController uiRedirectController() {
+        return new RedirectController();
+    }
+
     /**
      * A message source bean to add distributed message sources.
      * 
      * @return the message bean.
      */
     @Bean(name = "messageSource")
-    public DistributedResourceBundleMessageSource messageSource() {
+    DistributedResourceBundleMessageSource messageSource() {
         return new DistributedResourceBundleMessageSource();
     }
 
@@ -58,7 +64,7 @@ public class MgmtUiAutoConfiguration {
      */
     @Bean
     @ConditionalOnMissingBean
-    public UIEventProvider eventProvider() {
+    UIEventProvider eventProvider() {
         return new HawkbitEventProvider();
     }
 
@@ -81,7 +87,7 @@ public class MgmtUiAutoConfiguration {
     @Bean
     @ConditionalOnMissingBean
     @UIScope
-    public EventPushStrategy eventPushStrategy(final ConfigurableApplicationContext applicationContext,
+    EventPushStrategy eventPushStrategy(final ConfigurableApplicationContext applicationContext,
             final ScheduledExecutorService executorService, final UIEventBus eventBus,
             final UIEventProvider eventProvider, final UiProperties uiProperties) {
         final DelayedEventBusPushStrategy delayedEventBusPushStrategy = new DelayedEventBusPushStrategy(executorService,

hawkbit-autoconfigure/src/main/java/org/eclipse/hawkbit/autoconfigure/mgmt/ui/RedirectController.java

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2015 Bosch Software Innovations GmbH and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.eclipse.hawkbit.autoconfigure.mgmt.ui;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.servlet.ModelAndView;
+
+/**
+ * Redirects for convenience. hawkBit's management UI is by default not
+ * listening on / but on /UI.
+ *
+ */
+@Controller
+public class RedirectController {
+
+    /**
+     * @return redirect to the Management UI
+     */
+    @RequestMapping("/")
+    public ModelAndView home() {
+        return new ModelAndView("redirect:/UI/");
+    }
+}