Removed JPA dependencies from runtime. Test only now.

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

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

@@ -0,0 +1,54 @@
+/**
+ * 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.repository.jpa.model.helper;
+
+import org.springframework.beans.factory.annotation.Autowired;
+
+import com.google.common.eventbus.EventBus;
+
+/**
+ * A singleton bean which holds the {@link EventBus} to have to the cache
+ * manager in beans not instantiated by spring e.g. JPA entities or
+ * CacheFieldEntityListener which cannot be autowired.
+ *
+ */
+public final class EventBusHolder {
+
+    private static final EventBusHolder SINGLETON = new EventBusHolder();
+
+    @Autowired
+    private EventBus eventBus;
+
+    private EventBusHolder() {
+
+    }
+
+    /**
+     * @return the cache manager holder singleton instance
+     */
+    public static EventBusHolder getInstance() {
+        return SINGLETON;
+    }
+
+    /**
+     * @return the eventBus
+     */
+    public EventBus getEventBus() {
+        return eventBus;
+    }
+
+    /**
+     * @param eventBus
+     *            the eventBus to set
+     */
+    public void setEventBus(final EventBus eventBus) {
+        this.eventBus = eventBus;
+    }
+
+}