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   * 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.
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  package org.apache.atlas.repository.graphdb.janus.migration;
  
  import org.apache.atlas.exception.AtlasBaseException;
  import org.apache.atlas.model.impexp.MigrationStatus;
  import org.apache.atlas.model.typedef.AtlasTypesDef;
  import org.apache.atlas.repository.graphdb.GraphDBMigrator;
  import org.apache.atlas.type.AtlasType;
  import org.apache.atlas.type.AtlasTypeRegistry;
  import org.apache.atlas.utils.AtlasPerfTracer;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Component;
  
  import java.io.InputStream;
  
  import static org.apache.atlas.repository.graphdb.janus.AtlasJanusGraphDatabase.getBulkLoadingGraphInstance;
  import static org.apache.atlas.repository.graphdb.janus.AtlasJanusGraphDatabase.getGraphInstance;
  
  @Component
  public class GraphDBGraphSONMigrator implements GraphDBMigrator {
      private static final Logger LOG      = LoggerFactory.getLogger(GraphDBGraphSONMigrator.class);
      private static final Logger PERF_LOG = AtlasPerfTracer.getPerfLogger("GraphDBMigrator");
  
      private final TypesDefScrubber typesDefStrubberForMigrationImport = new TypesDefScrubber();
  
      @Override
      public AtlasTypesDef getScrubbedTypesDef(String jsonStr) {
          AtlasTypesDef typesDef = AtlasType.fromJson(jsonStr, AtlasTypesDef.class);
  
          return typesDefStrubberForMigrationImport.scrub(typesDef);
      }
  
      @Override
      public void importData(AtlasTypeRegistry typeRegistry, InputStream fs) throws AtlasBaseException {
          AtlasPerfTracer perf = null;
  
          try {
              LOG.info("Starting loadLegacyGraphSON...");
  
              if (AtlasPerfTracer.isPerfTraceEnabled(PERF_LOG)) {
                  perf = AtlasPerfTracer.getPerfTracer(PERF_LOG, "loadLegacyGraphSON");
              }
  
              AtlasGraphSONReader legacyGraphSONReader = AtlasGraphSONReader.build()
                      .relationshipCache(new ElementProcessors(typeRegistry, typesDefStrubberForMigrationImport))
                      .schemaDB(getGraphInstance())
                      .bulkLoadingDB(getBulkLoadingGraphInstance())
                      .create();
  
              legacyGraphSONReader.readGraph(fs);
          } catch (Exception ex) {
              LOG.error("Error loading loadLegacyGraphSON2", ex);
  
              throw new AtlasBaseException(ex);
          } finally {
              AtlasPerfTracer.log(perf);
  
              LOG.info("Done! loadLegacyGraphSON.");
          }
      }
  
      @Override
      public MigrationStatus getMigrationStatus() {
          return ReaderStatusManager.get(getGraphInstance());
      }
  }
  