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.notification;
  
  import org.apache.atlas.model.instance.AtlasEntityHeader;
  import org.apache.atlas.repository.store.graph.EntityCorrelationStore;
  import org.apache.commons.collections.CollectionUtils;
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.List;
  
  public class EntityCorrelationManager {
      private static final Logger LOG = LoggerFactory.getLogger(EntityCorrelationManager.class);
  
      private final EntityCorrelationStore entityCorrelationStore;
  
      public EntityCorrelationManager(EntityCorrelationStore entityCorrelationStore) {
          this.entityCorrelationStore = entityCorrelationStore;
      }
  
      public void add(boolean spooled, long spooledTimestamp, List<AtlasEntityHeader> entityHeaders) {
          if (this.entityCorrelationStore == null || !spooled || CollectionUtils.isEmpty(entityHeaders)) {
              return;
          }
  
          for (AtlasEntityHeader entityHeader : entityHeaders) {
              String guid = entityHeader.getGuid();
  
              if (StringUtils.isNotEmpty(guid)) {
                  entityCorrelationStore.add(guid, spooledTimestamp);
              }
          }
      }
  
      public String getGuidForDeletedEntityToBeCorrelated(String qualifiedName, long spooledMessageTimestamp) {
          if (this.entityCorrelationStore == null || spooledMessageTimestamp <= 0) {
              return null;
          }
  
          String guid = entityCorrelationStore.findCorrelatedGuid(qualifiedName, spooledMessageTimestamp);
  
          LOG.info("{}: spooledTimestamp: {} -> {}", qualifiedName, spooledMessageTimestamp, guid);
  
          return guid;
      }
  }
  