UI Spring Context Holder bean registration (#1026)

* register the Spring Context Holder bean for UI instead of setting the context for each UI separately
* reverted test scope for db driver

Signed-off-by: Bogdan Bondar <Bogdan.Bondar@bosch.io>

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

@@ -20,6 +20,7 @@ import org.eclipse.hawkbit.ui.push.HawkbitEventPermissionChecker;
 import org.eclipse.hawkbit.ui.push.HawkbitEventProvider;
 import org.eclipse.hawkbit.ui.push.UIEventPermissionChecker;
 import org.eclipse.hawkbit.ui.push.UIEventProvider;
+import org.eclipse.hawkbit.ui.utils.SpringContextHolder;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -81,6 +82,16 @@ public class MgmtUiAutoConfiguration {
         return new HawkbitEventPermissionChecker(permChecker);
     }
 
+    /**
+     * Bean for creating a singleton instance of the {@link SpringContextHolder}
+     * 
+     * @return the singleton instance of the {@link SpringContextHolder}
+     */
+    @Bean
+    SpringContextHolder springContextHolder() {
+        return SpringContextHolder.getInstance();
+    }
+
     /**
      * The UI scoped event push strategy. Session scope is necessary, that every
      * UI has an own strategy.

hawkbit-repository/hawkbit-repository-core/src/main/java/org/eclipse/hawkbit/repository/model/helper/EventPublisherHolder.java

@@ -35,7 +35,7 @@ public final class EventPublisherHolder {
     }
 
     /**
-     * @return the cache manager holder singleton instance
+     * @return the event publisher holder singleton instance
      */
     public static EventPublisherHolder getInstance() {
         return SINGLETON;

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/AbstractHawkbitUI.java

@@ -18,7 +18,6 @@ import org.eclipse.hawkbit.ui.push.UIEventProvider;
 import org.eclipse.hawkbit.ui.themes.HawkbitTheme;
 import org.eclipse.hawkbit.ui.utils.HawkbitCommonUtil;
 import org.eclipse.hawkbit.ui.utils.SPDateTimeUtil;
-import org.eclipse.hawkbit.ui.utils.SpringContextHelper;
 import org.eclipse.hawkbit.ui.utils.VaadinMessageSource;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -104,8 +103,6 @@ public abstract class AbstractHawkbitUI extends UI implements DetachListener {
             pushStrategy.clean();
             clearContextListener();
         }
-
-        SpringContextHelper.clearContext();
     }
 
     private void clearContextListener() {
@@ -127,7 +124,6 @@ public abstract class AbstractHawkbitUI extends UI implements DetachListener {
             pushStrategy.init(getUI());
         }
         addDetachListener(this);
-        SpringContextHelper.setContext(context);
 
         Responsive.makeResponsive(this);
         addStyleName(ValoTheme.UI_WITH_MENU);

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/artifacts/upload/AbstractFileTransferHandler.java

@@ -33,7 +33,7 @@ import org.eclipse.hawkbit.ui.common.data.proxies.ProxySoftwareModule;
 import org.eclipse.hawkbit.ui.common.event.EntityModifiedEventPayload;
 import org.eclipse.hawkbit.ui.common.event.EntityModifiedEventPayload.EntityModifiedEventType;
 import org.eclipse.hawkbit.ui.common.event.EventTopics;
-import org.eclipse.hawkbit.ui.utils.SpringContextHelper;
+import org.eclipse.hawkbit.ui.utils.SpringContextHolder;
 import org.eclipse.hawkbit.ui.utils.UINotification;
 import org.eclipse.hawkbit.ui.utils.VaadinMessageSource;
 import org.slf4j.Logger;
@@ -78,9 +78,9 @@ public abstract class AbstractFileTransferHandler implements Serializable {
             final Lock uploadLock) {
         this.artifactManagement = artifactManagement;
         this.i18n = i18n;
-        this.eventBus = SpringContextHelper.getBean(EventBus.UIEventBus.class);
+        this.eventBus = SpringContextHolder.getInstance().getBean(EventBus.UIEventBus.class);
-        this.artifactUploadState = SpringContextHelper.getBean(ArtifactUploadState.class);
+        this.artifactUploadState = SpringContextHolder.getInstance().getBean(ArtifactUploadState.class);
-        this.uiNotification = SpringContextHelper.getBean(UINotification.class);
+        this.uiNotification = SpringContextHolder.getInstance().getBean(UINotification.class);
         this.uploadLock = uploadLock;
     }
 
@@ -103,8 +103,9 @@ public abstract class AbstractFileTransferHandler implements Serializable {
 
     protected void startTransferToRepositoryThread(final InputStream inputStream, final FileUploadId fileUploadId,
             final String mimeType) {
-        SpringContextHelper.getBean("uiExecutor", Executor.class).execute(new TransferArtifactToRepositoryRunnable(
+        SpringContextHolder.getInstance().getBean("uiExecutor", Executor.class)
-                inputStream, fileUploadId, mimeType, UI.getCurrent(), uploadLock));
+                .execute(new TransferArtifactToRepositoryRunnable(inputStream, fileUploadId, mimeType, UI.getCurrent(),
+                        uploadLock));
     }
 
     private void interruptUploadAndSetReason(final String failureReason) {
@@ -241,15 +242,15 @@ public abstract class AbstractFileTransferHandler implements Serializable {
          * Constructor for TransferArtifactToRepositoryRunnable
          *
          * @param inputStream
-         *          InputStream
+         *            InputStream
          * @param fileUploadId
-         *          FileUploadId
+         *            FileUploadId
          * @param mimeType
-         *          String
+         *            String
          * @param vaadinUi
-         *          UI
+         *            UI
          * @param uploadLock
-         *          Lock
+         *            Lock
          */
         public TransferArtifactToRepositoryRunnable(final InputStream inputStream, final FileUploadId fileUploadId,
                 final String mimeType, final UI vaadinUi, final Lock uploadLock) {

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/common/UserDetailsFormatter.java

@@ -15,7 +15,7 @@ import org.apache.commons.lang3.StringUtils;
 import org.eclipse.hawkbit.im.authentication.TenantAwareAuthenticationDetails;
 import org.eclipse.hawkbit.im.authentication.UserPrincipal;
 import org.eclipse.hawkbit.repository.model.BaseEntity;
-import org.eclipse.hawkbit.ui.utils.SpringContextHelper;
+import org.eclipse.hawkbit.ui.utils.SpringContextHolder;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.core.context.SecurityContext;
 import org.springframework.security.core.userdetails.User;
@@ -179,10 +179,10 @@ public final class UserDetailsFormatter {
     public static UserDetails getCurrentUser() {
         final SecurityContext context = (SecurityContext) VaadinService.getCurrentRequest().getWrappedSession()
                 .getAttribute(HttpSessionSecurityContextRepository.SPRING_SECURITY_CONTEXT_KEY);
-        Authentication authentication = context.getAuthentication();
+        final Authentication authentication = context.getAuthentication();
         if (authentication instanceof OAuth2AuthenticationToken) {
-            OidcUser oidcUser = (OidcUser) authentication.getPrincipal();
+            final OidcUser oidcUser = (OidcUser) authentication.getPrincipal();
-            Object details = authentication.getDetails();
+            final Object details = authentication.getDetails();
             String tenant = "DEFAULT";
             if (details instanceof TenantAwareAuthenticationDetails) {
                 tenant = ((TenantAwareAuthenticationDetails) details).getTenant();
@@ -207,7 +207,8 @@ public final class UserDetailsFormatter {
     // Exception squid:S1166 - exception has to be hidden
     @SuppressWarnings({ "squid:S1166" })
     private static UserDetails loadUserByUsername(final String username) {
-        final UserDetailsService userDetailsService = SpringContextHelper.getBean(UserDetailsService.class);
+        final UserDetailsService userDetailsService = SpringContextHolder.getInstance()
+                .getBean(UserDetailsService.class);
         try {
             return userDetailsService.loadUserByUsername(username);
         } catch (final UsernameNotFoundException e) {

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/components/HawkbitUIErrorHandler.java

@@ -17,7 +17,7 @@ import javax.validation.ConstraintViolationException;
 
 import org.eclipse.hawkbit.ui.common.notification.ParallelNotification;
 import org.eclipse.hawkbit.ui.utils.SPUIStyleDefinitions;
-import org.eclipse.hawkbit.ui.utils.SpringContextHelper;
+import org.eclipse.hawkbit.ui.utils.SpringContextHolder;
 import org.eclipse.hawkbit.ui.utils.UINotification;
 import org.eclipse.hawkbit.ui.utils.VaadinMessageSource;
 import org.slf4j.Logger;
@@ -106,7 +106,7 @@ public class HawkbitUIErrorHandler extends DefaultErrorHandler {
         LOG.error("Error in UI: ", ex);
 
         final String errorMessage = extractMessageFrom(ex);
-        final VaadinMessageSource i18n = SpringContextHelper.getBean(VaadinMessageSource.class);
+        final VaadinMessageSource i18n = SpringContextHolder.getInstance().getBean(VaadinMessageSource.class);
 
         return buildErrorNotification(i18n.getMessage("caption.error"), errorMessage);
     }

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/login/AbstractHawkbitLoginUI.java

@@ -21,7 +21,6 @@ import org.eclipse.hawkbit.ui.components.SPUIComponentProvider;
 import org.eclipse.hawkbit.ui.themes.HawkbitTheme;
 import org.eclipse.hawkbit.ui.utils.HawkbitCommonUtil;
 import org.eclipse.hawkbit.ui.utils.SPUIStyleDefinitions;
-import org.eclipse.hawkbit.ui.utils.SpringContextHelper;
 import org.eclipse.hawkbit.ui.utils.UIComponentIdProvider;
 import org.eclipse.hawkbit.ui.utils.UINotification;
 import org.eclipse.hawkbit.ui.utils.VaadinMessageSource;
@@ -117,7 +116,6 @@ public abstract class AbstractHawkbitLoginUI extends UI {
     @Override
     protected void init(final VaadinRequest request) {
         HawkbitCommonUtil.initLocalization(this, uiProperties.getLocalization(), i18n);
-        SpringContextHelper.setContext(context);
 
         params = UriComponentsBuilder.fromUri(Page.getCurrent().getLocation()).build().getQueryParams();
 

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/utils/SpringContextHolder.java

@@ -8,30 +8,31 @@
  */
 package org.eclipse.hawkbit.ui.utils;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.ApplicationContext;
 
 /**
  * Singleton for the spring application context.
  */
-public final class SpringContextHelper {
+public final class SpringContextHolder {
 
-    private static ApplicationContext context;
+    private static final SpringContextHolder SINGLETON = new SpringContextHolder();
+
+    @Autowired
+    private ApplicationContext context;
 
     /**
      * Private Constructor.
      */
-    private SpringContextHelper() {
+    private SpringContextHolder() {
         // Utility class
     }
 
     /**
-     * method to set application context.
+     * @return the spring context holder singleton instance
-     * 
-     * @param context
-     *            ApplicationContext
      */
-    public static void setContext(final ApplicationContext context) {
+    public static SpringContextHolder getInstance() {
-        SpringContextHelper.context = context;
+        return SINGLETON;
     }
 
     /**
@@ -42,7 +43,7 @@ public final class SpringContextHelper {
      *            application context
      * @return the requested bean
      */
-    public static Object getBean(final String beanName) {
+    public Object getBean(final String beanName) {
         return context.getBean(beanName);
     }
 
@@ -54,7 +55,7 @@ public final class SpringContextHelper {
      *            application context
      * @return the requested bean
      */
-    public static <T> T getBean(final Class<T> beanClazz) {
+    public <T> T getBean(final Class<T> beanClazz) {
         return context.getBean(beanClazz);
     }
 
@@ -69,15 +70,7 @@ public final class SpringContextHelper {
      *            application context
      * @return the requested bean
      */
-    public static <T> T getBean(final String beanName, final Class<T> beanClazz) {
+    public <T> T getBean(final String beanName, final Class<T> beanClazz) {
         return context.getBean(beanName, beanClazz);
     }
-
-    /**
-     * method to clear application context.
-     * 
-     */
-    public static void clearContext() {
-        context = null;
-    }
 }