public Collection selectMessagesByChannel(long channelId) {
        Collection messages = new ArrayList();
        try {
            Connection conn = DAOFactory.getConnection();
            try {
                PreparedStatement query = conn.prepareStatement(
                        "select ID from jsub_Messages where ChannelID=?");
                query.setLong(1, channelId);
                ResultSet rs = query.executeQuery();
                while(rs.next()) {
                    Message message = findByPrimaryKey(rs.getLong("ID"));
                    messages.add(message);
                }
                rs.close();
                query.close();
            } finally {
                conn.close();
            }
        } catch(Exception e) {
            Log.error("Couldn't select messages by channel \"" + channelId + "\"", e);
        }        
        return messages;
    }