Add entity lifercycle interceptor interface and add a entity listener.

Signed-off-by: SirWayne <dennis.melzer@bosch-si.com>

hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/model/EntityInterceptor.java

@@ -0,0 +1,79 @@
+/**
+ * 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.model;
+
+/**
+ * Interface for the entity interceptor lifecycle.
+ */
+public interface EntityInterceptor {
+
+    /**
+     * Callback for the {@link @PrePersist} lifecycle event.
+     * 
+     * @param entity
+     *            the model entity
+     */
+    default void prePersist(final Object entity) {
+    };
+
+    /**
+     * Callback for the {@link @PostPersist} lifecycle event.
+     * 
+     * @param entity
+     *            the model entity
+     */
+    default void postPersist(final Object entity) {
+    };
+
+    /**
+     * Callback for the {@link @PostRemove} lifecycle event.
+     * 
+     * @param entity
+     *            the model entity
+     */
+    default void postRemove(final Object entity) {
+    };
+
+    /**
+     * Callback for the {@link @PreRemove} lifecycle event.
+     * 
+     * @param entity
+     *            the model entity
+     */
+    default void preRemove(final Object entity) {
+    };
+
+    /**
+     * Callback for the {@link @PostLoad} lifecycle event.
+     * 
+     * @param entity
+     *            the model entity
+     */
+    default void postLoad(final Object entity) {
+    };
+
+    /**
+     * Callback for the {@link @PreUpdate} lifecycle event.
+     * 
+     * @param entity
+     *            the model entity
+     */
+    default void preUpdate(final Object entity) {
+    };
+
+    /**
+     * Callback for the {@link @PostUpdate} lifecycle event.
+     * 
+     * @param entity
+     *            the model entity
+     */
+    default void postUpdate(final Object entity) {
+    };
+
+}

hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/RepositoryApplicationConfiguration.java

@@ -46,6 +46,7 @@ import org.eclipse.hawkbit.repository.jpa.aspects.ExceptionMappingAspectHandler;
 import org.eclipse.hawkbit.repository.jpa.configuration.MultiTenantJpaTransactionManager;
 import org.eclipse.hawkbit.repository.jpa.model.helper.AfterTransactionCommitExecutorHolder;
 import org.eclipse.hawkbit.repository.jpa.model.helper.CacheManagerHolder;
+import org.eclipse.hawkbit.repository.jpa.model.helper.EntityInterceptorHolder;
 import org.eclipse.hawkbit.repository.jpa.model.helper.SecurityTokenGeneratorHolder;
 import org.eclipse.hawkbit.repository.jpa.model.helper.SystemManagementHolder;
 import org.eclipse.hawkbit.repository.jpa.model.helper.SystemSecurityContextHolder;
@@ -144,6 +145,14 @@ public class RepositoryApplicationConfiguration extends JpaBaseConfiguration {
         return SecurityTokenGeneratorHolder.getInstance();
     }
 
+    /**
+     * @return the singleton instance of the {@link EntityInterceptorHolder}
+     */
+    @Bean
+    public EntityInterceptorHolder entityInterceptorHolder() {
+        return EntityInterceptorHolder.getInstance();
+    }
+
     /**
      * @return the singleton instance of the {@link CacheManagerHolder}
      */

hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/model/AbstractJpaBaseEntity.java

@@ -31,7 +31,8 @@ import org.springframework.data.jpa.domain.support.AuditingEntityListener;
  */
 @MappedSuperclass
 @Access(AccessType.FIELD)
-@EntityListeners({ AuditingEntityListener.class, CacheFieldEntityListener.class, EntityPropertyChangeListener.class })
+@EntityListeners({ AuditingEntityListener.class, CacheFieldEntityListener.class, EntityPropertyChangeListener.class,
+        EntityInterceptorListener.class })
 public abstract class AbstractJpaBaseEntity implements BaseEntity {
     private static final long serialVersionUID = 1L;
 

hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/model/EntityInterceptorListener.java

@@ -0,0 +1,69 @@
+/**
+ * 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;
+
+import javax.persistence.PostLoad;
+import javax.persistence.PostPersist;
+import javax.persistence.PostRemove;
+import javax.persistence.PostUpdate;
+import javax.persistence.PrePersist;
+import javax.persistence.PreRemove;
+import javax.persistence.PreUpdate;
+
+import org.eclipse.hawkbit.repository.jpa.model.helper.EntityInterceptorHolder;
+
+/**
+ * Entity listener which calls all entity interceptor for the lifecyles
+ * callbacks.
+ */
+public class EntityInterceptorListener {
+
+    @PrePersist
+    protected void prePersist(final Object entity) {
+        EntityInterceptorHolder.getInstance().getEntityInterceptors()
+                .forEach(interceptor -> interceptor.prePersist(entity));
+    }
+
+    @PostPersist
+    protected void postPersist(final Object entity) {
+        EntityInterceptorHolder.getInstance().getEntityInterceptors()
+                .forEach(interceptor -> interceptor.postPersist(entity));
+    }
+
+    @PostRemove
+    protected void postRemove(final Object entity) {
+        EntityInterceptorHolder.getInstance().getEntityInterceptors()
+                .forEach(interceptor -> interceptor.postRemove(entity));
+    }
+
+    @PreRemove
+    protected void preRemove(final Object entity) {
+        EntityInterceptorHolder.getInstance().getEntityInterceptors()
+                .forEach(interceptor -> interceptor.preRemove(entity));
+    }
+
+    @PostLoad
+    protected void postLoad(final Object entity) {
+        EntityInterceptorHolder.getInstance().getEntityInterceptors()
+                .forEach(interceptor -> interceptor.postLoad(entity));
+    }
+
+    @PreUpdate
+    protected void preUpdate(final Object entity) {
+        EntityInterceptorHolder.getInstance().getEntityInterceptors()
+                .forEach(interceptor -> interceptor.preUpdate(entity));
+    }
+
+    @PostUpdate
+    protected void postUpdate(final Object entity) {
+        EntityInterceptorHolder.getInstance().getEntityInterceptors()
+                .forEach(interceptor -> interceptor.postUpdate(entity));
+    }
+
+}

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

@@ -0,0 +1,42 @@
+/**
+ * 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 java.util.List;
+
+import org.eclipse.hawkbit.repository.model.EntityInterceptor;
+import org.springframework.beans.factory.annotation.Autowired;
+
+/**
+ * A singleton bean which holds the {@link EntityInterceptor} to have all
+ * interceptors in spring beans.
+ * 
+ */
+public final class EntityInterceptorHolder {
+
+    private static final EntityInterceptorHolder SINGLETON = new EntityInterceptorHolder();
+
+    @Autowired
+    private List<EntityInterceptor> entityInterceptors;
+
+    private EntityInterceptorHolder() {
+
+    }
+
+    /**
+     * @return the entity intreceptor holder singleton instance
+     */
+    public static EntityInterceptorHolder getInstance() {
+        return SINGLETON;
+    }
+
+    public List<EntityInterceptor> getEntityInterceptors() {
+        return entityInterceptors;
+    }
+}