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.ambari.server.upgrade;
  
  import java.sql.SQLException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.orm.dao.BlueprintDAO;
  import org.apache.ambari.server.orm.entities.BlueprintConfigEntity;
  import org.apache.ambari.server.orm.entities.BlueprintEntity;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.gson.Gson;
  import com.google.inject.Inject;
  import com.google.inject.Injector;
  
  
  /**
   * The {@link UpgradeCatalog275} upgrades Ambari from 2.7.4 to 2.7.5.
   */
  public class UpgradeCatalog275 extends AbstractUpgradeCatalog {
  
    private static final Logger LOG = LoggerFactory.getLogger(UpgradeCatalog275.class);
    static final Gson GSON = new Gson();
  
  
    @Inject
    public UpgradeCatalog275(Injector injector) {
      super(injector);
    }
  
    @Override
    public String getSourceVersion() {
      return "2.7.4";
    }
  
    @Override
    public String getTargetVersion() {
      return "2.7.5";
    }
  
    /**
     * Perform database schema transformation. Can work only before persist service start
     *
     * @throws AmbariException
     * @throws SQLException
     */
    @Override
    protected void executeDDLUpdates() throws AmbariException, SQLException {
      // no actions needed
    }
  
    /**
     * Perform data insertion before running normal upgrade of data, requires started persist service
     *
     * @throws AmbariException
     * @throws SQLException
     */
    @Override
    protected void executePreDMLUpdates() throws AmbariException, SQLException {
      LOG.debug("UpgradeCatalog275 executing Pre-DML Updates.");
      removeDfsHAInitial();
    }
  
    /**
     * Performs normal data upgrade
     *
     * @throws AmbariException
     * @throws SQLException
     */
    @Override
    protected void executeDMLUpdates() throws AmbariException, SQLException {
      LOG.debug("UpgradeCatalog275 executing DML Updates.");
      addNewConfigurationsFromXml();
    }
  
    protected void removeDfsHAInitial() {
      BlueprintDAO blueprintDAO = injector.getInstance(BlueprintDAO.class);
      List<BlueprintEntity> blueprintEntityList = blueprintDAO.findAll();
      List<BlueprintEntity> changedBlueprints = new ArrayList<>();
      for (BlueprintEntity blueprintEntity : blueprintEntityList){
        boolean changed = false;
        Collection<BlueprintConfigEntity> blueprintConfigurations = blueprintEntity.getConfigurations();
        for (BlueprintConfigEntity blueprintConfigEntity : blueprintConfigurations) {
          if (blueprintConfigEntity.getType().equals("hadoop-env")) {
            String configData = blueprintConfigEntity.getConfigData();
  
            Map<String, String> typeProperties = GSON.<Map<String, String>>fromJson(
              configData, Map.class);
  
            typeProperties.remove("dfs_ha_initial_namenode_standby");
            typeProperties.remove("dfs_ha_initial_namenode_active");
  
            blueprintConfigEntity.setConfigData(GSON.toJson(typeProperties));
            changed = true;
          }
        }
        if (changed) {
          changedBlueprints.add(blueprintEntity);
        }
      }
      for (BlueprintEntity blueprintEntity : changedBlueprints) {
        blueprintDAO.merge(blueprintEntity);
      }
    }
  }