private static void applyConfs()

in kyuubi-hive-jdbc/src/main/java/org/apache/kyuubi/jdbc/hive/ZooKeeperHiveClientHelper.java [164:238]
58 lines of code
24 McCabe index (conditional complexity)

  private static void applyConfs(String serverConfStr, JdbcConnectionParams connParams)
      throws Exception {
    Matcher matcher = kvPattern.matcher(serverConfStr);
    while (matcher.find()) {
      // Have to use this if-else since switch-case on String is supported Java 7 onwards
      if ((matcher.group(1) != null)) {
        if ((matcher.group(2) == null)) {
          throw new Exception(
              "Null config value for: " + matcher.group(1) + " published by the server.");
        }
        // Set host
        if (matcher.group(1).equals("hive.server2.thrift.bind.host")) {
          connParams.setHost(matcher.group(2));
        }
        // Set transportMode
        if ((matcher.group(1).equals("hive.server2.transport.mode"))
            && !(connParams.getSessionVars().containsKey(JdbcConnectionParams.TRANSPORT_MODE))) {
          connParams.getSessionVars().put(JdbcConnectionParams.TRANSPORT_MODE, matcher.group(2));
        }
        // Set port
        if (matcher.group(1).equals("hive.server2.thrift.port")) {
          connParams.setPort(Integer.parseInt(matcher.group(2)));
        }
        if ((matcher.group(1).equals("hive.server2.thrift.http.port"))
            && !(connParams.getPort() > 0)) {
          connParams.setPort(Integer.parseInt(matcher.group(2)));
        }
        // Set sasl qop
        if ((matcher.group(1).equals("hive.server2.thrift.sasl.qop"))
            && !(connParams.getSessionVars().containsKey(JdbcConnectionParams.AUTH_QOP))) {
          connParams.getSessionVars().put(JdbcConnectionParams.AUTH_QOP, matcher.group(2));
        }
        // Set http path
        if ((matcher.group(1).equals("hive.server2.thrift.http.path"))
            && !(connParams.getSessionVars().containsKey(JdbcConnectionParams.HTTP_PATH))) {
          connParams.getSessionVars().put(JdbcConnectionParams.HTTP_PATH, matcher.group(2));
        }
        // Set SSL
        if ((matcher.group(1) != null)
            && (matcher.group(1).equals("hive.server2.use.SSL"))
            && !(connParams.getSessionVars().containsKey(JdbcConnectionParams.USE_SSL))) {
          connParams.getSessionVars().put(JdbcConnectionParams.USE_SSL, matcher.group(2));
        }
        /*
         * Note: this is pretty messy, but sticking to the current implementation. Set
         * authentication configs. Note that in JDBC driver, we have 3 auth modes: NOSASL, Kerberos
         * and password based. The use of
         * JdbcConnectionParams.AUTH_TYPE==JdbcConnectionParams.AUTH_SIMPLE picks NOSASL. The
         * presence of JdbcConnectionParams.AUTH_PRINCIPAL==<principal> picks Kerberos.
         * Otherwise password based (which includes NONE, PAM, LDAP, CUSTOM)
         */
        if (matcher.group(1).equals("hive.server2.authentication")) {
          // NOSASL
          if (matcher.group(2).equalsIgnoreCase("NOSASL")
              && !(connParams.getSessionVars().containsKey(JdbcConnectionParams.AUTH_TYPE)
                  && connParams
                      .getSessionVars()
                      .get(JdbcConnectionParams.AUTH_TYPE)
                      .equalsIgnoreCase(JdbcConnectionParams.AUTH_SIMPLE))) {
            connParams
                .getSessionVars()
                .put(JdbcConnectionParams.AUTH_TYPE, JdbcConnectionParams.AUTH_SIMPLE);
          }
        }
        // KERBEROS
        if (matcher.group(1).equalsIgnoreCase("hive.server2.authentication.kerberos.principal")
            && !(connParams.getSessionVars().containsKey(JdbcConnectionParams.AUTH_PRINCIPAL)
                && !(connParams
                    .getSessionVars()
                    .containsKey(JdbcConnectionParams.AUTH_KYUUBI_SERVER_PRINCIPAL)))) {
          connParams.getSessionVars().put(JdbcConnectionParams.AUTH_PRINCIPAL, matcher.group(2));
        }
      }
    }
  }