Files
2025-05-18 13:04:45 +08:00

60 lines
2.3 KiB
Python

# Copyright Epic Games, Inc. All Rights Reserved.
import msgpackrpc
from msgpackrpc.error import TransportError
from .error import ReconnectionLimitReached
from . import logger
from .utils import *
import threading
class Client(msgpackrpc.Client):
# crucial function names
FUNCNAME_LIST_FUNCTIONS = 'list_functions'
FUNCNAME_PING = 'ping'
__port_range_start = DEFAULT_PORT
__port_range_span = 128
__next_available_port_offset = 0
__lock = threading.Lock()
def __init__(self, server_address=LOCALHOST, server_port=DEFAULT_PORT, timeout=DEFAULT_TIMEOUT, reconnect_limit=1024, **kwargs):
if server_port is None:
server_port = find_available_port(server_address)
address = msgpackrpc.Address(server_address, server_port)
# using pack_encoding=None since it's using encodings is deprecated (via msgpack.Packer)
super().__init__(address, timeout=timeout, pack_encoding=None, reconnect_limit=reconnect_limit, **kwargs)
#self._restart = lambda: self.__init__(server_address, server_port, **kwargs)
def ensure_connection(self):
logger.info('attempting connection at at port {}:{}'.format(self.address.host, self.address.port))
try:
self.call(Client.FUNCNAME_PING)
except TransportError as e:
# a bit hacky, but if underlying CODEs change unit tests will catch it
if e.CODE == 'Retry connection over the limit':
raise ReconnectionLimitReached
raise # else
def _add_function(self, function_name):
self.__dict__[function_name] = lambda *args: self.call(function_name, *args)
def add_functions(self):
self.ensure_connection()
function_list = self.call(Client.FUNCNAME_LIST_FUNCTIONS)
for fname in map(lambda x: x.decode('utf-8'), function_list):
self._add_function(fname)
logger.debug('Functions bound: {}'.format(function_list))
@classmethod
def connect(cls):
""" Returns an instance of the default client"""
return cls()
@property
def connected(self):
# breach of encapsulation but there's no other way to access this information
return self._transport._connecting > 0 and not self._transport._closed