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.Map;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.controller.AmbariManagementController;
  import org.apache.ambari.server.state.Cluster;
  import org.apache.ambari.server.state.Clusters;
  import org.apache.ambari.server.state.Config;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.Inject;
  import com.google.inject.Injector;
  
  /**
   * The {@link UpgradeCatalog261} upgrades Ambari from 2.6.0 to 2.6.1.
   */
  public class UpgradeCatalog261 extends AbstractUpgradeCatalog {
    private static final String CORE_SITE = "core-site";
    private static final String COMPRESSION_CODECS_PROPERTY = "io.compression.codecs";
    private static final String COMPRESSION_CODECS_LZO = "com.hadoop.compression.lzo";
    private static final String LZO_ENABLED_JSON_KEY = "lzo_enabled";
  
    private static final Logger LOG = LoggerFactory.getLogger(UpgradeCatalog261.class);
  
    /**
     * Constructor.
     *
     * @param injector
     */
    @Inject
    public UpgradeCatalog261(Injector injector) {
      super(injector);
    }
  
    /**
     * {@inheritDoc}
     */
    @Override
    public String getSourceVersion() {
        return "2.6.0";
    }
  
    /**
     * {@inheritDoc}
     */
    @Override
    public String getTargetVersion() {
        return "2.6.1";
    }
  
    /**
     * {@inheritDoc}
     */
    @Override
    protected void executeDDLUpdates() throws AmbariException, SQLException {
    }
  
    /**
     * {@inheritDoc}
     */
    @Override
    protected void executePreDMLUpdates() throws AmbariException, SQLException {
    }
  
    /**
     * {@inheritDoc}
     */
    @Override
    protected void executeDMLUpdates() throws AmbariException, SQLException {
      // TODO: make this map with clusterids as keys
      this.getUpgradeJsonOutput().put(LZO_ENABLED_JSON_KEY, isLzoEnabled().toString());
    }
  
    protected Boolean isLzoEnabled() throws AmbariException {
      AmbariManagementController ambariManagementController = injector.getInstance(AmbariManagementController.class);
      Clusters clusters = ambariManagementController.getClusters();
      if (clusters != null) {
        Map<String, Cluster> clusterMap = getCheckedClusterMap(clusters);
        if (clusterMap != null && !clusterMap.isEmpty()) {
          for (final Cluster cluster : clusterMap.values()) {
  
            Config coreSite = cluster.getDesiredConfigByType(CORE_SITE);
            if (coreSite != null) {
              Map<String, String> coreSiteProperties = coreSite.getProperties();
  
              if (coreSiteProperties.containsKey(COMPRESSION_CODECS_PROPERTY)) {
                String compressionCodecs = coreSiteProperties.get(COMPRESSION_CODECS_PROPERTY);
  
                if(compressionCodecs.contains(COMPRESSION_CODECS_LZO)) {
                  return true;
                }
              }
            }
          }
        }
      }
      return false;
    }
  }
  