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.checks;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.ambari.annotations.UpgradeCheckInfo;
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.spi.upgrade.UpgradeCheckDescription;
  import org.apache.ambari.spi.upgrade.UpgradeCheckGroup;
  import org.apache.ambari.spi.upgrade.UpgradeCheckRequest;
  import org.apache.ambari.spi.upgrade.UpgradeCheckResult;
  import org.apache.ambari.spi.upgrade.UpgradeCheckStatus;
  import org.apache.ambari.spi.upgrade.UpgradeCheckType;
  import org.apache.commons.lang.StringUtils;
  
  import com.google.common.collect.ImmutableMap;
  import com.google.inject.Singleton;
  
  /**
   * The {@link LZOCheck}
   * is used to check that the LZO codec enabled in the core-site config fnd warning if any hosts require LZO, it should be installed before starting the upgrade.
   */
  @Singleton
  @UpgradeCheckInfo(group = UpgradeCheckGroup.INFORMATIONAL_WARNING)
  public class LZOCheck extends ClusterCheck {
  
    final static String IO_COMPRESSION_CODECS = "io.compression.codecs";
    final static String LZO_ENABLE_KEY = "io.compression.codec.lzo.class";
    final static String LZO_ENABLE_VALUE = "com.hadoop.compression.lzo.LzoCodec";
  
    static final UpgradeCheckDescription LZO_CONFIG_CHECK = new UpgradeCheckDescription("LZO_CONFIG_CHECK",
        UpgradeCheckType.CLUSTER,
        "LZO Codec Check",
        new ImmutableMap.Builder<String, String>()
            .put(UpgradeCheckDescription.DEFAULT,
                "You have LZO codec enabled in the core-site config of your cluster. LZO is no longer installed automatically. " +
                    "If any hosts require LZO, it should be installed before starting the upgrade. " +
                    "Consult Ambari documentation for instructions on how to do this.").build());
  
    /**
     * Constructor.
     */
    public LZOCheck() {
      super(LZO_CONFIG_CHECK);
    }
  
    /**
     * {@inheritDoc}
     */
    @Override
    public UpgradeCheckResult perform(UpgradeCheckRequest request) throws AmbariException {
      UpgradeCheckResult result = new UpgradeCheckResult(this);
  
      if (config.getGplLicenseAccepted()){
        return result;
      }
  
      List<String> errorMessages = new ArrayList<>();
      UpgradeCheckStatus checkStatus = UpgradeCheckStatus.WARNING;
  
      String codecs = getProperty(request, "core-site", IO_COMPRESSION_CODECS);
      if (codecs!= null && codecs.contains(LZO_ENABLE_VALUE)) {
        errorMessages.add(getFailReason(IO_COMPRESSION_CODECS, result, request));
      }
      String classValue = getProperty(request, "core-site", LZO_ENABLE_KEY);
  
      if (LZO_ENABLE_VALUE.equals(classValue)) {
        errorMessages.add(getFailReason(LZO_ENABLE_KEY, result, request));
      }
  
      if (!errorMessages.isEmpty()) {
        result.setFailReason(StringUtils.join(errorMessages, "You have LZO codec enabled in the core-site config of your cluster. " +
            "You have to accept GPL license during ambari-server setup to have LZO installed automatically. " +
            "If any hosts require LZO, it should be installed before starting the upgrade. " +
            "Consult Ambari documentation for instructions on how to do this."));
        result.getFailedOn().add("LZO");
        result.setStatus(checkStatus);
      }
  
      return result;
    }
  }
  