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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.repository.store.graph.v1;
  
  import org.apache.atlas.DeleteType;
  import org.apache.atlas.RequestContext;
  import org.apache.atlas.repository.graphdb.AtlasGraph;
  import org.apache.atlas.tasks.TaskManagement;
  import org.apache.atlas.type.AtlasTypeRegistry;
  import org.apache.atlas.util.AtlasRepositoryConfiguration;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Component;
  
  import javax.inject.Inject;
  import javax.inject.Singleton;
  
  @Singleton
  @Component
  public class DeleteHandlerDelegate {
      private static final Logger LOG = LoggerFactory.getLogger(DeleteHandlerDelegate.class);
  
      private final SoftDeleteHandlerV1 softDeleteHandler;
      private final HardDeleteHandlerV1 hardDeleteHandler;
      private final DeleteHandlerV1     defaultHandler;
      private final AtlasGraph          graph;
      private final TaskManagement      taskManagement;
  
      @Inject
      public DeleteHandlerDelegate(AtlasGraph graph, AtlasTypeRegistry typeRegistry, TaskManagement taskManagement) {
          this.graph             = graph;
          this.taskManagement    = taskManagement;
          this.softDeleteHandler = new SoftDeleteHandlerV1(graph, typeRegistry, taskManagement);
          this.hardDeleteHandler = new HardDeleteHandlerV1(graph, typeRegistry, taskManagement);
          this.defaultHandler    = getDefaultConfiguredHandler(typeRegistry);
      }
  
      public DeleteHandlerV1 getHandler() {
          return getHandler(RequestContext.get().getDeleteType());
      }
  
      public DeleteHandlerV1 getHandler(DeleteType deleteType) {
          if (deleteType == null) {
              deleteType = DeleteType.DEFAULT;
          }
  
          switch (deleteType) {
              case SOFT:
                  return softDeleteHandler;
  
              case HARD:
                  return hardDeleteHandler;
  
              default:
                  return defaultHandler;
          }
      }
  
      private DeleteHandlerV1 getDefaultConfiguredHandler(AtlasTypeRegistry typeRegistry) {
          DeleteHandlerV1 ret;
  
          try {
              Class<?> handlerFromProperties = AtlasRepositoryConfiguration.getDeleteHandlerV1Impl();
  
              LOG.info("Default delete handler set to: {}", handlerFromProperties.getName());
  
              ret = (DeleteHandlerV1) handlerFromProperties.getConstructor(AtlasGraph.class, AtlasTypeRegistry.class, TaskManagement.class).newInstance(this.graph, typeRegistry, taskManagement);
          } catch (Exception ex) {
              LOG.error("Error instantiating default delete handler. Defaulting to: {}", softDeleteHandler.getClass().getName(), ex);
  
              ret = softDeleteHandler;
          }
  
          return ret;
      }
  }
  