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.cleanup;
  
  import java.text.DateFormat;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  import org.apache.ambari.server.audit.AuditLoggerModule;
  import org.apache.ambari.server.controller.ControllerModule;
  import org.apache.ambari.server.ldap.LdapModule;
  import org.apache.commons.cli.CommandLine;
  import org.apache.commons.cli.CommandLineParser;
  import org.apache.commons.cli.DefaultParser;
  import org.apache.commons.cli.HelpFormatter;
  import org.apache.commons.cli.Option;
  import org.apache.commons.cli.Options;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.Guice;
  import com.google.inject.Injector;
  import com.google.inject.persist.jpa.AmbariJpaPersistService;
  
  /**
   * Class in charge for driving the cleanup process.
   */
  public class CleanupDriver {
    private static final Logger LOGGER = LoggerFactory.getLogger(CleanupDriver.class);
  
    private static final String DATE_PATTERN = "yyyy-MM-dd";
    private static final String CLUSTER_NAME_ARG = "cluster-name";
    private static final String FROM_DATE_ARG = "from-date";
  
    private static Options getOptions() {
      Options options = new Options();
      options.addOption(Option.builder().longOpt(CLUSTER_NAME_ARG).desc("The cluster name").required().type(String.class).hasArg().valueSeparator(' ').build());
      options.addOption(Option.builder().longOpt(FROM_DATE_ARG).desc("Date up until data will be purged.").required().type(String.class).hasArg().valueSeparator(' ').build());
      return options;
    }
  
    private static CleanupContext processArguments(String... args) {
      CommandLineParser cmdLineParser = new DefaultParser();
      HelpFormatter formatter = new HelpFormatter();
      DateFormat df = new SimpleDateFormat(DATE_PATTERN);
      CleanupContext ctx = null;
  
      try {
        CommandLine line = cmdLineParser.parse(getOptions(), args);
        String clusterName = (String) line.getParsedOptionValue(CLUSTER_NAME_ARG);
        Date fromDate = df.parse(line.getOptionValue(FROM_DATE_ARG));
        ctx = new CleanupContext(clusterName, fromDate.getTime());
      } catch (Exception exp) {
        System.err.println("Parsing failed.  Reason: " + exp.getMessage());
        LOGGER.error("Parsing failed.  Reason: ", exp);
        formatter.printHelp("db-purge-history", getOptions());
        System.exit(1);
      }
      return ctx;
    }
  
  
    public static void main(String... args) throws Exception {
      LOGGER.info("DB-PURGE - Starting the database purge process ...");
  
      CleanupContext cleanupContext = processArguments(args);
  
      // set up the guice context
      Injector injector = Guice.createInjector(new ControllerModule(), new AuditLoggerModule(), new CleanupModule(), new LdapModule());
  
      // explicitly starting the persist service
      injector.getInstance(AmbariJpaPersistService.class).start();
  
      CleanupServiceImpl cleanupService = injector.getInstance(CleanupServiceImpl.class);
      CleanupService.CleanupResult result = cleanupService.cleanup(new TimeBasedCleanupPolicy(cleanupContext.getClusterName(), cleanupContext.getFromDayTimestamp()));
  
      // explicitly stopping the persist service
      injector.getInstance(AmbariJpaPersistService.class).stop();
  
      if (result.getErrorCount() > 0) {
        LOGGER.warn("DB-PURGE - completed with error, check Ambari Server log for details ! Number of affected records [{}]", result.getAffectedRows());
        System.exit(2);
      }
  
      LOGGER.info("DB-PURGE - completed. Number of affected records [{}]", result.getAffectedRows());
    }
  
    /**
     * Context object that encapsulates values passed in as arguments to the driver class.
     * Represents the input for the cleanup process.
     */
    private static class CleanupContext {
      private String clusterName;
      private Long fromDayTimestamp;
  
      public CleanupContext(String clusterName, Long fromDayTimestamp) {
        this.clusterName = clusterName;
        this.fromDayTimestamp = fromDayTimestamp;
      }
  
      public String getClusterName() {
        return clusterName;
      }
  
      public Long getFromDayTimestamp() {
        return fromDayTimestamp;
      }
    }
  }
  