content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.atlas.listener;
  
  import org.apache.atlas.AtlasException;
  import org.apache.atlas.model.glossary.AtlasGlossaryTerm;
  import org.apache.atlas.v1.model.instance.Referenceable;
  import org.apache.atlas.v1.model.instance.Struct;
  
  import java.util.Collection;
  
  /**
   * Entity (a Typed instance) change notification listener.
   */
  public interface EntityChangeListener {
      /**
       * This is upon adding new entities to the repository.
       *
       * @param entities  the created entities
       *
       * @param isImport
       * @throws AtlasException if the listener notification fails
       */
      void onEntitiesAdded(Collection<Referenceable> entities, boolean isImport) throws AtlasException;
  
      /**
       * This is upon updating an entity.
       *
       * @param entities        the updated entities
       *
       * @param isImport
       * @throws AtlasException if the listener notification fails
       */
      void onEntitiesUpdated(Collection<Referenceable> entities, boolean isImport) throws AtlasException;
  
      /**
       * This is upon adding a new trait to a typed instance.
       *
       * @param entity        the entity
       * @param traits    trait that needs to be added to entity
       *
       * @throws AtlasException if the listener notification fails
       */
      void onTraitsAdded(Referenceable entity, Collection<? extends Struct> traits) throws AtlasException;
  
      /**
       * This is upon deleting a trait from a typed instance.
       *
       * @param entity        the entity
       * @param traits    trait that needs to be added to entity
       *
       * @throws AtlasException if the listener notification fails
       */
      void onTraitsDeleted(Referenceable entity, Collection<? extends Struct> traits) throws AtlasException;
  
      /**
       * This is upon updating a trait from a typed instance.
       * @param entity    the entity
       * @param traits    trait that needs to be added to entity
       * @throws AtlasException if the listener notification fails
       */
      void onTraitsUpdated(Referenceable entity, Collection<? extends Struct> traits) throws AtlasException;
  
      /**
       * This is upon deleting entities from the repository.
       * @param entities the deleted entities
       * @param isImport
       * @throws AtlasException
       */
      void onEntitiesDeleted(Collection<Referenceable> entities, boolean isImport) throws AtlasException;
  
      /**
       * This is upon adding a new term to a list of typed instance.
       * @param entities entity list
       * @param term  term that needs to be added to entity
       * @throws AtlasException if the listener notification fails
       */
      void onTermAdded(Collection<Referenceable> entities, AtlasGlossaryTerm term) throws AtlasException;
  
      /**
       * This is upon adding a new trait to a typed instance.
       * @param entities entity list
       * @param term  term that needs to be added to entity
       * @throws AtlasException if the listener notification fails
       */
      void onTermDeleted(Collection<Referenceable> entities, AtlasGlossaryTerm term) throws AtlasException;
  }
  