OPENDJ-1719: implement upgrade tasks for migrating JE backends

Matthew Swift

07.10.2015 642ee854211fe638a4c47b44eae0d1405f20caf7

 opendj-server-legacy/src/main/java/org/opends/server/tools/upgrade/UpgradeUtils.java

@@ -371,44 +371,35 @@
   *
   * @return A backend list.
   */
  static List<String> getLocalBackendsFromConfig()
  static List<String> getIndexedBackendsFromConfig()
  {
    final Schema schema = getUpgradeSchema();

    final SearchRequest sr = Requests.newSearchRequest("", SearchScope.WHOLE_SUBTREE,
            "(&(objectclass=ds-cfg-pluggable-backend)(ds-cfg-enabled=true))",
            "ds-cfg-base-dn");
    final List<String> listBackends = new LinkedList<>();
    LDIFEntryReader entryReader = null;
    try
    try (final EntryReader entryReader = searchConfigFile(sr))
    {
      entryReader =
          new LDIFEntryReader(new FileInputStream(new File(configDirectory,
              CURRENT_CONFIG_FILE_NAME))).setSchema(schema);

      final SearchRequest sr =
          Requests.newSearchRequest("", SearchScope.WHOLE_SUBTREE,
              "(&(objectclass=ds-cfg-local-db-backend)(ds-cfg-enabled=true))",
              "ds-cfg-base-dn");

      final EntryReader resultReader = LDIF.search(entryReader, sr, schema);

      while (resultReader.hasNext())
      while (entryReader.hasNext())
      {
        final Entry entry = resultReader.readEntry();
        listBackends.add(entry.getAttribute("ds-cfg-base-dn")
            .firstValueAsString());
        final Entry entry = entryReader.readEntry();
        listBackends.addAll(entry.parseAttribute("ds-cfg-base-dn").asSetOfString());
      }
    }
    catch (Exception ex)
    {
      logger.error(LocalizableMessage.raw(ex.getMessage()));
    }
    finally
    {
      StaticUtils.close(entryReader);
    }

    return listBackends;
  }

  static EntryReader searchConfigFile(final SearchRequest sr) throws FileNotFoundException
  {
    final Schema schema = getUpgradeSchema();
    final File configFile = new File(configDirectory, CURRENT_CONFIG_FILE_NAME);
    final LDIFEntryReader entryReader = new LDIFEntryReader(new FileInputStream(configFile)).setSchema(schema);
    return LDIF.search(entryReader, sr, schema);
  }

  /**
   * Updates the config file during the upgrade process.
   *