def main():  #pragma no cover
    """
    OpenMDAO factory service process.

    Usage: python objserverfactory.py [--allow-public][--allow-shell][--hosts=filename][--types=filename][--users=filename][--address=address][--port=number][--prefix=name][--tunnel][--resources=filename][--log-host=hostname][--log-port=number][--log-prefix=string]

    --allow-public:
        Allows access by anyone from any allowed host. Use with care!

    --allow-shell:
        Allows access to :meth:`execute_command` and :meth:`load_model`.
        Use with care!

    --hosts: string
        Filename for allowed hosts specification. Default ``hosts.allow``.
        Ignored if '--users' is specified.
        The file should contain IPv4 host addresses, IPv4 domain addresses,
        or hostnames, one per line. Blank lines are ignored, and '#' marks the
        start of a comment which continues to the end of the line.
        For security reasons this file must be accessible only by the user
        running this server.

    --types: string
        Filename for allowed types specification.
        If not specified then allow types listed by
        :meth:`factorymanager.get_available_types`.
        The file should contain one type name per line.

    --users: string
        Filename for allowed users specification.
        Ignored if '--allow-public' is specified.
        Default is ``~/.ssh/authorized_keys``, other files should be of the
        same format: each line has ``key-type public-key-data user@host``,
        where `user` is the username on `host`. `host` will be translated to an
        IPv4 address and included in the allowed hosts list.
        Note that this ``user@host`` form is not necessarily enforced by
        programs which generate keys.
        For security reasons this file must be accessible only by the user
        running this server.

    --address: string
        IPv4 address, hostname, or pipe name.
        Default is the host's default IPv4 address.

    --port: int
        Server port (default of 0 implies next available port).
        Note that ports below 1024 typically require special privileges.
        If port is negative, then a local pipe is used for communication.

    --prefix: string
        Prefix for configuration and stdout/stderr files (default ``server``).

    --tunnel:
        Report host IP address but listen for connections from a local
        SSH tunnel.

    --resources: string
        Filename for resource configuration. If not specified then the
        default of ``~/.openmdao/resources.cfg`` will be used.

    --log-host: string
        Hostname to send remote log messages to.

    --log-port: int
        Port on `log-host` to send remote log messages to.

    --log-prefix: string
        Prefix to apply to remote log messages. Default is ``pid@host``.

    If ``prefix.key`` exists, it is read for an authorization key string.
    Otherwise, public key authorization and encryption is used.

    Allowed hosts *must* be specified if `port` is >= 0. Only allowed hosts
    may connect to the server.

    Once initialized ``prefix.cfg`` is written with address, port, and
    public key information.
    """
    parser = optparse.OptionParser()
    parser.add_option('--address', action='store', type='str',
                      help='Network address to serve.')
    parser.add_option('--allow-public', action='store_true', default=False,
                      help='Allows access by any user, use with care!')
    parser.add_option('--allow-shell', action='store_true', default=False,
                      help='Allows potential shell access, use with care!')
    parser.add_option('--hosts', action='store', type='str',
                      default='hosts.allow', help='Filename for allowed hosts')
    parser.add_option('--types', action='store', type='str',
                      help='Filename for allowed types')
    parser.add_option('--users', action='store', type='str',
                      default='~/.ssh/authorized_keys',
                      help='Filename for allowed users')
    parser.add_option('--port', action='store', type='int', default=0,
                      help='Server port (0 implies next available port)')
    parser.add_option('--prefix', action='store', default='server',
                      help='Prefix for config and stdout/stderr files')
    parser.add_option('--tunnel', action='store_true', default=False,
                      help='Report host IP address but listen for connections'
                           ' from a local SSH tunnel')
    parser.add_option('--resources', action='store', type='str',
                      default=None, help='Filename for resource configuration')
    parser.add_option('--log-host', action='store', type='str',
                      default=None, help='hostname for remote log messages')
    parser.add_option('--log-port', action='store', type='int',
                      default=None, help='port for remote log messages')
    parser.add_option('--log-prefix', action='store', type='str',
                      default=None, help='prefix for remote log messages')

    options, arguments = parser.parse_args()
    if arguments:
        parser.print_help()
        sys.exit(1)

    logger = logging.getLogger()
    logger.setLevel(logging.DEBUG)
    if options.log_host and options.log_port:
        install_remote_handler(options.log_host, int(options.log_port),
                               options.log_prefix)

    server_key = options.prefix+'.key'
    server_cfg = options.prefix+'.cfg'
    global _SERVER_CFG
    _SERVER_CFG = server_cfg

    # Get authkey.
    authkey = 'PublicKey'
    try:
        with open(server_key, 'r') as inp:
            authkey = inp.readline().strip()
        os.remove(server_key)
    except __HOLE__:
        pass

    if options.allow_shell:
        msg = 'Shell access is ALLOWED'
        logger.warning(msg)
        print msg

    allowed_users = None
    allowed_hosts = None

    # Get allowed_users.
    if options.allow_public:
        allowed_users = None
        msg = 'Public access is ALLOWED'
        logger.warning(msg)
        print msg

        if options.port >= 0:
            # Get allowed_hosts.
            if os.path.exists(options.hosts):
                try:
                    allowed_hosts = read_allowed_hosts(options.hosts)
                except Exception as exc:
                    msg = "Can't read allowed hosts file %r: %s" \
                          % (options.hosts, exc)
                    logger.error(msg)
                    print msg
                    sys.exit(1)
            else:
                msg = 'Allowed hosts file %r does not exist.' % options.hosts
                logger.error(msg)
                print msg
                sys.exit(1)

            if not allowed_hosts:
                msg = 'No hosts in allowed hosts file %r.' % options.hosts
                logger.error(msg)
                print msg
                sys.exit(1)
    else:
        if os.path.exists(options.users):
            try:
                allowed_users = read_authorized_keys(options.users, logger)
            except Exception as exc:
                msg = "Can't read allowed users file %r: %s" \
                      % (options.users, exc)
                logger.error(msg)
                print msg
                sys.exit(1)
        else:
            msg = 'Allowed users file %r does not exist.' % options.users
            logger.error(msg)
            print msg
            sys.exit(1)

        if not allowed_users:
            msg = 'No users in allowed users file %r.' % options.users
            logger.error(msg)
            print msg
            sys.exit(1)

    # Get allowed_types.
    allowed_types = None
    if options.types:
        if os.path.exists(options.types):
            allowed_types = []
            with open(options.types, 'r') as inp:
                line = inp.readline()
                while line:
                    line = line.strip()
                    if line:
                        allowed_types.append(line)
                    line = inp.readline()
        else:
            msg = 'Allowed types file %r does not exist.' % options.types
            logger.error(msg)
            print msg
            sys.exit(1)

    # Optionally configure resources.
    if options.resources:
        # Import here to avoid import loop.
        from openmdao.main.resource import ResourceAllocationManager as RAM
        RAM.configure(options.resources)

    # Get address and create manager.
    if options.port >= 0:
        if options.address:  # Specify IPv4/hostname.
            address = (options.address, options.port)
        else:
            address = (platform.node(), options.port)
    else:
        if options.address:  # Specify pipename.
            address = options.address
        else:
            address = None

    logger.info('Starting FactoryManager %s %r', address, keytype(authkey))
    current_process().authkey = authkey
    bind_address = ('127.0.0.1', options.port) if options.tunnel else address
    manager = _FactoryManager(bind_address, authkey, name='Factory',
                              allowed_hosts=allowed_hosts,
                              allowed_users=allowed_users,
                              allow_tunneling=options.tunnel)

    # Set defaults for created ObjServerFactories.
    # There isn't a good method to propagate these through the manager.
    ObjServerFactory._address = address
    ObjServerFactory._allow_shell = options.allow_shell
    ObjServerFactory._allowed_types = allowed_types
    ObjServerFactory._allow_tunneling = options.tunnel

    # Get server, retry if specified address is in use.
    server = None
    retries = 0
    while server is None:
        try:
            server = manager.get_server()
        except socket.error as exc:
            if str(exc).find('Address already in use') >= 0:
                if retries < 10:
                    msg = 'Address %s in use, retrying...' % (address,)
                    logger.debug(msg)
                    print msg
                    time.sleep(5)
                    retries += 1
                else:
                    msg = 'Address %s in use, too many retries.' % (address,)
                    logger.error(msg)
                    print msg
                    sys.exit(1)
            else:
                raise

    # Record configuration.
    real_ip = None if address is None else address[0]
    write_server_config(server, _SERVER_CFG, real_ip)
    msg = 'Serving on %s' % (server.address,)
    logger.info(msg)
    print msg
    sys.stdout.flush()

    # And away we go...
    signal.signal(signal.SIGTERM, _sigterm_handler)
    try:
        server.serve_forever()
    finally:
        _cleanup()
    sys.exit(0)
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.main/src/openmdao/main/objserverfactory.py/main