public Database(String host, String database, String username, String password)
    {
        connection_string = "jdbc:mysql://" + host + "/" + database;
    }

    public Database(String database, String username, String password)
    {
        connection_string = "jdbc:mysql:///" + database +
                            "?socketFactory=com.mysql.jdbc.NamedPipeSocketFactory";
    }

    public Database(String namedPipePath, String database, String username, String password)
    {
        connection_string = "jdbc:mysql:///" + database +
                            "?socketFactory=com.mysql.jdbc.NamedPipeSocketFactory" +
                            "&namedPipePath=" + namedPipePath;
    }