Пример #1
0
  /* return list of all Devices within the specified DeviceGroup (NOT SCALABLE BEYOND A FEW HUNDRED GROUPS) */
  public static java.util.List<String> getUsersForGroup(String acctId, String groupId)
      throws DBException {

    /* valid account/groupId? */
    if (StringTools.isBlank(acctId)) {
      return null;
    } else if (StringTools.isBlank(groupId)) {
      return null;
    }

    /* get db selector */
    DBSelect dsel = GroupList._getUserListSelect(acctId, groupId);
    if (dsel == null) {
      return null;
    }

    /* read users for group */
    java.util.List<String> usrList = new Vector<String>();
    DBConnection dbc = null;
    Statement stmt = null;
    ResultSet rs = null;
    try {
      dbc = DBConnection.getDefaultConnection();
      stmt = dbc.execute(dsel.toString());
      rs = stmt.getResultSet();
      while (rs.next()) {
        String usrId = rs.getString(GroupList.FLD_userID);
        usrList.add(usrId);
      }
    } catch (SQLException sqe) {
      throw new DBException("Get Group GroupeList", sqe);
    } finally {
      if (rs != null) {
        try {
          rs.close();
        } catch (Throwable t) {
        }
      }
      if (stmt != null) {
        try {
          stmt.close();
        } catch (Throwable t) {
        }
      }
      DBConnection.release(dbc);
    }

    /* return list */
    return usrList;
  }
Пример #2
0
  /**
   * ** Returns true if the specified key attribute exists in the table ** @param altIndexName The
   * alternate index name, or null to use the primary index ** @param whereKeyType The partial key
   * match type ** @return True if the specified key attribute exists in the table, false otherwise
   */
  protected boolean _exists(String altIndexName, int whereKeyType)
      throws SQLException, DBException {

    /* key fields */
    boolean usePrimaryKey = StringTools.isBlank(altIndexName);
    DBField kfld[] = usePrimaryKey ? this.getKeyFields() : this.getAltKeyFields(altIndexName);
    if (ListTools.isEmpty(kfld)) {
      throw new DBException("No keys found!");
    }

    /* check last key for "auto_increment" */
    if (whereKeyType == DBWhere.KEY_FULL) {
      DBField lastField = kfld[kfld.length - 1];
      if (lastField.isAutoIncrement()
          && !this.getFieldValues().hasFieldValue(lastField.getName())) {
        // full key requested and last key is auto_increment, which is missing
        return false;
      }
    }

    // DBSelect: SELECT <Keys> FROM <TableName> <KeyWhere>
    String firstKey = kfld[0].getName();
    DBSelect<gDBR> dsel = new DBSelect<gDBR>(this.getFactory());
    dsel.setSelectedFields(firstKey);
    dsel.setWhere(this._getWhereClause(altIndexName, whereKeyType));

    /* get keyed record */
    DBConnection dbc = null;
    Statement stmt = null;
    ResultSet rs = null;
    boolean exists = false;
    try {
      dbc = DBConnection.getDefaultConnection();
      stmt = dbc.execute(dsel.toString()); // may throw DBException
      rs = stmt.getResultSet();
      exists = rs.next();
    } catch (SQLException sqe) {
      if (sqe.getErrorCode() == DBFactory.SQLERR_TABLE_NOTLOCKED) {
        // MySQL: This case has been seen on rare occasions.  Not sure what causes it.
        Print.logError("SQL Lock Error: " + sqe);
        Print.logError("Hackery! Forcing lock on table: " + this.getTableName());
        if (DBProvider.lockTableForRead(this.getTableName(), true)) { // may throw DBException
          stmt = dbc.execute(dsel.toString()); // may throw SQLException, DBException
          rs = stmt.getResultSet(); // SQLException
          exists = rs.next(); // SQLException
          DBProvider.unlockTables(); // DBException
        }
      } else {
        throw sqe;
      }
    } finally {
      if (rs != null) {
        try {
          rs.close();
        } catch (Throwable t) {
        }
      }
      if (stmt != null) {
        try {
          stmt.close();
        } catch (Throwable t) {
        }
      }
      DBConnection.release(dbc);
    }

    return exists;
  }