class MCDReforgedServer:
process: Optional[Popen]
def __init__(self):
# TODO console args
self.mcdr_state = MCDReforgedState.INITIALIZING
self.server_state = ServerState.STOPPED
self.process = None # type: Optional[PIPE]
self.flags = MCDReforgedFlag.NONE
self.starting_server_lock = Lock(
) # to prevent multiple start_server() call
self.stop_lock = Lock() # to prevent multiple stop() call
# will be assigned in on_config_changed()
self.encoding_method = None # type: Optional[str]
self.decoding_method = None # type: Optional[str]
# --- Constructing fields ---
self.logger = MCDReforgedLogger(self)
self.logger.set_file(constant.LOGGING_FILE)
self.server_interface = ServerInterface(self)
self.task_executor = TaskExecutor(self)
self.console_handler = ConsoleHandler(self)
self.watch_dog = WatchDog(self)
self.update_helper = UpdateHelper(self)
self.language_manager = LanguageManager(self.logger)
self.config = Config(self.logger)
self.rcon_manager = RconManager(self)
self.server_handler_manager = ServerHandlerManager(self)
self.reactor_manager = InfoReactorManager(self)
self.command_manager = CommandManager(self)
self.plugin_manager = PluginManager(self)
self.permission_manager = PermissionManager(self)
# --- Initialize fields instance ---
file_missing = False
try:
self.load_config(
allowed_missing_file=False) # loads config, language, handlers
except FileNotFoundError:
self.logger.error('Config is missing, default config generated')
self.config.save_default()
file_missing = True
try:
self.permission_manager.load_permission_file(
allowed_missing_file=False)
except FileNotFoundError:
self.logger.error(
'Permission file is missing, default permission file generated'
)
self.permission_manager.save_default()
file_missing = True
if file_missing:
self.on_first_start()
return
self.plugin_manager.register_permanent_plugins()
self.set_mcdr_state(MCDReforgedState.INITIALIZED)
def __del__(self):
try:
if self.process and self.process.poll() is None:
self.kill_server()
except:
pass
def on_first_start(self):
self.logger.info(
'Some of the user files are missing, check them before launch MCDR again'
)
default_config = self.config.get_default()
file_util.touch_directory(default_config['working_directory'])
self.plugin_manager.set_plugin_directories(
default_config['plugin_directories']) # to touch the directory
# --------------------------
# Translate info strings
# --------------------------
def tr(self, text, *args, allow_failure=True):
result = self.language_manager.translate(text,
allow_failure).strip('\r\n')
if len(args) > 0:
result = result.format(*args)
return result
# --------------------------
# Loaders
# --------------------------
def load_config(self, *, allowed_missing_file=True):
has_missing = self.config.read_config(allowed_missing_file)
# load the language first to make sure tr() is available
self.on_config_changed()
if has_missing:
for line in self.tr('config.missing_config').splitlines():
self.logger.warning(line)
def on_config_changed(self):
logger.console_color_disabled = self.config['disable_console_color']
self.logger.set_debug_options(self.config['debug'])
if self.config.is_debug_on():
self.logger.info(
self.tr('mcdr_server.on_config_changed.debug_mode_on'))
self.language_manager.set_language(self.config['language'])
self.logger.info(
self.tr('mcdr_server.on_config_changed.language_set',
self.config['language']))
self.encoding_method = self.config['encoding'] if self.config[
'encoding'] is not None else sys.getdefaultencoding()
self.decoding_method = self.config['decoding'] if self.config[
'decoding'] is not None else locale.getpreferredencoding()
self.logger.info(
self.tr('mcdr_server.on_config_changed.encoding_decoding_set',
self.encoding_method, self.decoding_method))
self.plugin_manager.set_plugin_directories(
self.config['plugin_directories'])
self.logger.info(
self.tr('mcdr_server.on_config_changed.plugin_directories_set',
self.encoding_method, self.decoding_method))
for directory in self.plugin_manager.plugin_directories:
self.logger.info('- {}'.format(directory))
self.reactor_manager.register_reactors(
self.config['custom_info_reactors'])
self.server_handler_manager.register_handlers(
self.config['custom_handlers'])
self.server_handler_manager.set_handler(self.config['handler'])
self.logger.info(
self.tr('mcdr_server.on_config_changed.handler_set',
self.config['handler']))
self.connect_rcon()
def load_plugins(self):
self.plugin_manager.refresh_all_plugins()
self.logger.info(
self.plugin_manager.last_operation_result.to_rtext(show_path=True))
def on_plugin_changed(self):
self.command_manager.clear_command()
self.plugin_manager.registry_storage.export_commands(
self.command_manager.register_command)
# ---------------------------
# State Getters / Setters
# ---------------------------
def is_server_running(self):
return self.server_state.in_state(
{ServerState.RUNNING, ServerState.STOPPING})
# Flags
def is_server_startup(self):
return MCDReforgedFlag.SERVER_STARTUP in self.flags
def is_server_rcon_ready(self):
return MCDReforgedFlag.SERVER_RCON_READY in self.flags
def is_interrupt(self):
return MCDReforgedFlag.INTERRUPT in self.flags
def is_mcdr_exit(self):
return self.mcdr_in_state(MCDReforgedState.STOPPED)
def is_mcdr_about_to_exit(self):
return self.mcdr_in_state(
{MCDReforgedState.PRE_STOPPED, MCDReforgedState.STOPPED})
def is_exit_naturally(self):
return MCDReforgedFlag.EXIT_NATURALLY in self.flags
def with_flag(self, flag: MCDReforgedFlag):
self.flags |= flag
def remove_flag(self, flag: MCDReforgedFlag):
self.flags &= ~flag
def set_exit_naturally(self, flag):
if flag:
self.with_flag(MCDReforgedFlag.EXIT_NATURALLY)
else:
self.remove_flag(MCDReforgedFlag.EXIT_NATURALLY)
self.logger.debug('flag_exit_naturally has set to "{}"'.format(flag),
option=DebugOption.MCDR)
# State
def server_in_state(self, states):
return self.server_state.in_state(states)
def mcdr_in_state(self, states):
return self.mcdr_state.in_state(states)
def is_initialized(self):
return self.mcdr_in_state(MCDReforgedState.INITIALIZED)
def set_server_state(self, state):
self.server_state = state
self.logger.debug('Server state has set to "{}"'.format(state),
option=DebugOption.MCDR)
def set_mcdr_state(self, state):
self.mcdr_state = state
self.logger.debug('MCDR state has set to "{}"'.format(state),
option=DebugOption.MCDR)
def should_keep_looping(self):
"""
A criterion for sub threads to determine if it should keep looping
:rtype: bool
"""
if self.server_in_state(ServerState.STOPPED):
if self.is_interrupt(): # if interrupted and stopped
return False
return not self.is_exit_naturally(
) # if the sever exited naturally, exit MCDR
return not self.is_mcdr_exit()
# --------------------------
# Server Controls
# --------------------------
def start_server(self):
"""
try to start the server process
return True if the server process has started successfully
return False if the server is not able to start
:return: a bool as above
:rtype: bool
"""
with self.starting_server_lock:
if self.is_interrupt():
self.logger.warning(
self.tr('mcdr_server.start_server.already_interrupted'))
return False
if self.is_server_running():
self.logger.warning(
self.tr('mcdr_server.start_server.start_twice'))
return False
if self.is_mcdr_about_to_exit():
self.logger.warning(
self.tr('mcdr_server.start_server.about_to_exit'))
return False
cwd = self.config['working_directory']
if not os.path.isdir(cwd):
self.logger.error(
self.tr('mcdr_server.start_server.cwd_not_existed', cwd))
return False
try:
start_command = self.config['start_command']
self.logger.info(
self.tr('mcdr_server.start_server.starting',
start_command))
self.process = Popen(start_command,
cwd=self.config['working_directory'],
stdin=PIPE,
stdout=PIPE,
stderr=STDOUT,
shell=True)
except:
self.logger.exception(
self.tr('mcdr_server.start_server.start_fail'))
return False
else:
self.on_server_start()
return True
def kill_server(self):
"""
Kill the server process group
"""
if self.process and self.process.poll() is None:
self.logger.info(self.tr('mcdr_server.kill_server.killing'))
try:
for child in psutil.Process(
self.process.pid).children(recursive=True):
child.kill()
self.logger.info(
self.tr('mcdr_server.kill_server.process_killed',
child.pid))
except psutil.NoSuchProcess:
pass
self.process.kill()
self.logger.info(
self.tr('mcdr_server.kill_server.process_killed',
self.process.pid))
else:
raise IllegalCallError(
"Server process has already been terminated")
def interrupt(self):
"""
Interrupt MCDR
The first call will softly stop the server and the later calls will kill the server
Return if it's the first try
:rtype: bool
"""
self.logger.info(
'Interrupting, first strike = {}'.format(not self.is_interrupt()))
self.stop(forced=self.is_interrupt())
ret = self.is_interrupt()
self.with_flag(MCDReforgedFlag.INTERRUPT)
return ret
def stop(self, forced=False):
"""
Stop the server
:param forced: an optional bool. If it's False (default) MCDR will stop the server by sending the STOP_COMMAND from the
current handler. If it's True MCDR will just kill the server process group
"""
with self.stop_lock:
if not self.is_server_running():
self.logger.warning(
self.tr('mcdr_server.stop.stop_when_stopped'))
return
self.set_server_state(ServerState.STOPPING)
if not forced:
try:
self.send(self.server_handler_manager.get_current_handler(
).get_stop_command())
except:
self.logger.error(self.tr('mcdr_server.stop.stop_fail'))
forced = True
if forced:
try:
self.kill_server()
except IllegalCallError:
pass
# --------------------------
# Server Logics
# --------------------------
def on_server_start(self):
self.logger.info(
self.tr('mcdr_server.start_server.pid_info', self.process.pid))
self.plugin_manager.dispatch_event(MCDRPluginEvents.SERVER_START, ())
self.set_server_state(ServerState.RUNNING)
self.set_exit_naturally(
True
) # Set after server state is set to RUNNING, or MCDR might have a chance to exit if the server is started by other thread
def on_server_stop(self):
return_code = self.process.poll()
self.logger.info(
self.tr('mcdr_server.on_server_stop.show_stopcode', return_code))
self.process.stdin.close()
self.process.stdout.close()
self.process = None
self.set_server_state(ServerState.STOPPED)
self.remove_flag(
MCDReforgedFlag.SERVER_STARTUP
| MCDReforgedFlag.SERVER_RCON_READY) # removes this two
self.plugin_manager.dispatch_event(MCDRPluginEvents.SERVER_STOP,
(return_code, ),
wait=True)
def send(self, text, ending='\n', encoding=None):
"""
Send a text to server's stdin if the server is running
:param text: A str or a bytes you want to send. if text is a str then it will attach the ending parameter to its
back
:param str ending: The suffix of a command with a default value \n
:param str encoding: The encoding method for the text. If it's not given used the method in config
"""
if encoding is None:
encoding = self.encoding_method
if type(text) is str:
text = (text + ending).encode(encoding)
if self.is_server_running():
self.process.stdin.write(text)
self.process.stdin.flush()
else:
self.logger.warning(self.tr('mcdr_server.send.send_when_stopped'))
def receive(self):
"""
Try to receive a str from server's stdout. This will block the current thread
If server has stopped it will wait up to 10s for the server process to exit, then raise a ServerStopped exception
:rtype: str
:raise: ServerStopped
"""
while True:
try:
text = next(iter(self.process.stdout))
except StopIteration: # server process has stopped
for i in range(constant.WAIT_TIME_AFTER_SERVER_STDOUT_END_SEC *
10):
if self.process.poll() is not None:
break
time.sleep(0.1)
if i % 10 == 0:
self.logger.info(
self.tr('mcdr_server.receive.wait_stop'))
raise ServerStopped()
else:
try:
text = text.decode(self.decoding_method)
except:
self.logger.error(
self.tr('mcdr_server.receive.decode_fail', text))
raise
return text.rstrip('\n\r').lstrip('\n\r')
def tick(self):
"""
ticking MCDR:
try to receive a new line from server's stdout and parse / display / process the text
"""
try:
text = self.receive()
except ServerStopped:
self.on_server_stop()
return
try:
text = self.server_handler_manager.get_current_handler(
).pre_parse_server_stdout(text)
except:
self.logger.warning(self.tr('mcdr_server.tick.pre_parse_fail'))
parsed_result: Info
try:
parsed_result = self.server_handler_manager.get_current_handler(
).parse_server_stdout(text)
except:
if self.logger.should_log_debug(
option=DebugOption.HANDLER
): # traceback.format_exc() is costly
self.logger.debug(
'Fail to parse text "{}" from stdout of the server, using raw handler'
.format(text))
for line in traceback.format_exc().splitlines():
self.logger.debug(' {}'.format(line))
parsed_result = self.server_handler_manager.get_basic_handler(
).parse_server_stdout(text)
else:
if self.logger.should_log_debug(option=DebugOption.HANDLER):
self.logger.debug('Parsed text from server stdin:')
for line in parsed_result.format_text().splitlines():
self.logger.debug(' {}'.format(line))
self.server_handler_manager.detect_text(text)
self.reactor_manager.put_info(parsed_result)
def on_mcdr_start(self):
self.task_executor.start()
self.task_executor.enqueue_regular_task(self.load_plugins)
self.task_executor.wait_till_finish_all_task()
self.plugin_manager.dispatch_event(MCDRPluginEvents.MCDR_START, ())
if not self.config['disable_console_thread']:
self.console_handler.start()
else:
self.logger.info(
self.tr('mcdr_server.on_mcdr_start.console_disabled'))
if not self.start_server():
raise ServerStartError()
self.update_helper.start()
self.watch_dog.start()
self.server_handler_manager.start_handler_detection()
self.set_mcdr_state(MCDReforgedState.RUNNING)
def on_mcdr_stop(self):
try:
self.set_mcdr_state(MCDReforgedState.PRE_STOPPED)
if self.is_interrupt():
self.logger.info(
self.tr('mcdr_server.on_mcdr_stop.user_interrupted'))
else:
self.logger.info(
self.tr('mcdr_server.on_mcdr_stop.server_stop'))
self.watch_dog.stop() # it's ok for plugins to take some time
self.watch_dog.join()
self.plugin_manager.dispatch_event(MCDRPluginEvents.MCDR_STOP, (),
wait=True)
self.logger.info(self.tr('mcdr_server.on_mcdr_stop.bye'))
except KeyboardInterrupt: # I don't know why there sometimes will be a KeyboardInterrupt if MCDR is stopped by ctrl-c
pass
except:
self.logger.exception(
self.tr('mcdr_server.on_mcdr_stop.stop_error'))
finally:
self.set_mcdr_state(MCDReforgedState.STOPPED)
def start(self):
"""
The entry method to start MCDR
Try to start the server. if succeeded the console thread will start and MCDR will start ticking
:raise: IllegalStateError if MCDR is in wrong state
:raise: ServerStartError if the server is already running or start_server has been called by other
"""
if not self.mcdr_in_state(MCDReforgedState.INITIALIZED):
if self.mcdr_in_state(MCDReforgedState.INITIALIZING):
raise IllegalStateError(
'This instance is not fully initialized')
else:
raise IllegalStateError('MCDR can only start once')
self.main_loop()
return self.process
def main_loop(self):
"""
The main loop of MCDR
"""
self.on_mcdr_start()
while self.should_keep_looping():
try:
if self.is_server_running():
self.tick()
else:
time.sleep(0.01)
except KeyboardInterrupt:
self.interrupt()
except:
if self.is_interrupt():
break
else:
self.logger.critical(self.tr('mcdr_server.run.error'),
exc_info=True)
self.on_mcdr_stop()
def connect_rcon(self):
self.rcon_manager.disconnect()
if self.config['rcon']['enable'] and self.is_server_rcon_ready():
self.rcon_manager.connect(self.config['rcon']['address'],
self.config['rcon']['port'],
self.config['rcon']['password'])
class MCDReforgedServer:
process: Optional[Popen]
def __init__(self, *, generate_default_only: bool = False, initialize_environment: bool = False):
"""
:param generate_default_only: If set to true, MCDR will only generate the default configure and permission files
"""
self.mcdr_state = MCDReforgedState.INITIALIZING
self.server_state = ServerState.STOPPED
self.server_information = ServerInformation()
self.process = None # type: Optional[PIPE]
self.flags = MCDReforgedFlag.NONE
self.starting_server_lock = Lock() # to prevent multiple start_server() call
self.stop_lock = Lock() # to prevent multiple stop() call
# will be assigned in on_config_changed()
self.encoding_method = None # type: Optional[str]
self.decoding_method = None # type: Optional[str]
# --- Constructing fields --- #
self.logger = MCDReforgedLogger()
self.config = Config(self.logger)
self.permission_manager = PermissionManager(self)
self.basic_server_interface = ServerInterface(self)
self.task_executor = TaskExecutor(self)
self.console_handler = ConsoleHandler(self)
self.watch_dog = WatchDog(self)
self.update_helper = UpdateHelper(self)
self.translation_manager = TranslationManager(self.logger)
self.rcon_manager = RconManager(self)
self.server_handler_manager = ServerHandlerManager(self)
self.reactor_manager = InfoReactorManager(self)
self.command_manager = CommandManager(self)
self.plugin_manager = PluginManager(self)
self.preference_manager = PreferenceManager(self)
self.__check_environment()
# --- Input arguments "generate_default_only" processing --- #
if generate_default_only:
self.config.save_default()
self.permission_manager.save_default()
return
# --- Initialize fields instance --- #
self.translation_manager.load_translations() # translations are used for logging, so load them first
if initialize_environment:
# Prepare config / permission files if they're missing
if not self.config.file_presents():
self.config.save_default()
default_config = self.config.get_default_yaml()
file_util.touch_directory(default_config['working_directory']) # create server/ folder
if not self.permission_manager.file_presents():
self.permission_manager.save_default()
# Check if there's any file missing
# If there's any, MCDR environment might not be probably setup
file_missing = False
def load(kind: str, func: Callable[[], Any]) -> bool:
nonlocal file_missing
try:
func()
except FileNotFoundError:
self.logger.error('{} is missing'.format(kind.title()))
file_missing = True
except YAMLError as e:
self.logger.error('Failed to load {}: {}'.format(kind, type(e).__name__))
for line in str(e).splitlines():
self.logger.error(line)
return False
else:
return True
# load_config: config, language, handlers, plugin directories, reactors, handlers
# load_permission_file: permission
# config change will lead to creating plugin folders
loading_success = \
load('configure', lambda: self.load_config(allowed_missing_file=False, echo=not initialize_environment)) and \
load('permission', lambda: self.permission_manager.load_permission_file(allowed_missing_file=False))
if file_missing:
self.__on_file_missing()
return
if not loading_success:
return
# MCDR environment has been setup, so continue creating default folders and loading stuffs
self.logger.set_file(core_constant.LOGGING_FILE) # will create logs/ folder
self.plugin_manager.touch_directory() # will create config/ folder
# --- Done --- #
self.set_mcdr_state(MCDReforgedState.INITIALIZED)
def __del__(self):
try:
if self.process and self.process.poll() is None:
self.__kill_server()
except:
pass
def __check_environment(self):
"""
Some checks at initialization
In dev environment, you can use setup.py to create `mcdreforged.egg-info/` so the package check can pass
"""
mcdr_pkg = core_constant.PACKAGE_NAME # should be "mcdreforged"
try:
pkg_resources.require(mcdr_pkg)
except pkg_resources.ResolutionError:
self.logger.warning('It looks like you\'re launching MCDR from source, since {} is not found in python packages'.format(mcdr_pkg))
self.logger.warning('In this way, the plugin system might not work correctly')
self.logger.warning('In a production environment, you should install {} from PyPI, see document ({}) for more information'.format(mcdr_pkg, core_constant.DOCUMENTION_URL))
self.logger.warning('MCDR will launch after 20 seconds...')
time.sleep(20)
def __on_file_missing(self):
self.logger.info('Looks like MCDR is not initialized at current directory {}'.format(os.getcwd()))
self.logger.info('Use "python -m {} init" to initialize MCDR first'.format(core_constant.PACKAGE_NAME))
# --------------------------
# Translate
# --------------------------
def get_language(self) -> str:
return self.translation_manager.language
def tr(self, translation_key: str, *args, language: Optional[str] = None, allow_failure=True, **kwargs) -> MessageText:
"""
Return a translated text corresponded to the translation key and format the text with given args
If args contains RText element, then the result will be a RText, otherwise the result will be a regular str
If the translation key is not recognized, the return value will be the translation key itself if allow_failure is True
:param translation_key: The key of the translation
:param args: The args to be formatted
:param language: Specific language to be used in this translation, or the language that MCDR is using will be used
:param allow_failure: If set to false, a KeyError will be risen if the translation key is not recognized
:param kwargs: The kwargs to be formatted
"""
return self.translation_manager.translate(
translation_key, args, kwargs,
allow_failure=allow_failure,
language=language,
fallback_language=self.translation_manager.language,
plugin_translations=self.plugin_manager.registry_storage.translations
)
# --------------------------
# Loaders
# --------------------------
def load_config(self, *, allowed_missing_file: bool = True, echo: bool = True):
has_missing = self.config.read_config(allowed_missing_file)
# load the language first to make sure tr() is available
self.on_config_changed(echo)
if echo and has_missing:
for line in self.tr('config.missing_config').splitlines():
self.logger.warning(line)
def on_config_changed(self, echo: bool):
MCColoredFormatter.console_color_disabled = self.config['disable_console_color']
self.logger.set_debug_options(self.config['debug'])
if echo and self.config.is_debug_on():
self.logger.info(self.tr('mcdr_server.on_config_changed.debug_mode_on'))
self.translation_manager.set_language(self.config['language'])
if echo:
self.logger.info(self.tr('mcdr_server.on_config_changed.language_set', self.config['language']))
self.encoding_method = self.config['encoding'] if self.config['encoding'] is not None else sys.getdefaultencoding()
self.decoding_method = self.config['decoding'] if self.config['decoding'] is not None else locale.getpreferredencoding()
if echo:
self.logger.info(self.tr('mcdr_server.on_config_changed.encoding_decoding_set', self.encoding_method, self.decoding_method))
self.plugin_manager.set_plugin_directories(self.config['plugin_directories'])
if echo:
self.logger.info(self.tr('mcdr_server.on_config_changed.plugin_directories_set', self.encoding_method, self.decoding_method))
for directory in self.plugin_manager.plugin_directories:
self.logger.info('- {}'.format(directory))
self.reactor_manager.register_reactors(self.config['custom_info_reactors'])
self.server_handler_manager.register_handlers(self.config['custom_handlers'])
self.server_handler_manager.set_handler(self.config['handler'])
if echo:
self.logger.info(self.tr('mcdr_server.on_config_changed.handler_set', self.config['handler']))
self.connect_rcon()
def load_plugins(self):
self.plugin_manager.refresh_all_plugins()
self.logger.info(self.plugin_manager.last_operation_result.to_rtext(show_path=True))
def on_plugin_registry_changed(self):
self.command_manager.clear_command()
self.plugin_manager.registry_storage.export_commands(self.command_manager.register_command)
# ---------------------------
# General Setters
# ---------------------------
# for field read-only access, simply use directly reference
# but for field writing operation, use setters
def set_task_executor(self, new_task_executor: TaskExecutor):
self.task_executor = new_task_executor
# ---------------------------
# State Getters / Setters
# ---------------------------
def is_server_running(self):
return self.server_state.in_state({ServerState.RUNNING, ServerState.STOPPING})
# Flags
def is_server_startup(self):
return MCDReforgedFlag.SERVER_STARTUP in self.flags
def is_server_rcon_ready(self):
return MCDReforgedFlag.SERVER_RCON_READY in self.flags
def is_interrupt(self):
return MCDReforgedFlag.INTERRUPT in self.flags
def is_mcdr_exit(self):
return self.mcdr_in_state(MCDReforgedState.STOPPED)
def is_mcdr_about_to_exit(self):
return self.mcdr_in_state({MCDReforgedState.PRE_STOPPED, MCDReforgedState.STOPPED})
def should_exit_after_stop(self):
return MCDReforgedFlag.EXIT_AFTER_STOP in self.flags
def with_flag(self, flag: MCDReforgedFlag):
self.flags |= flag
self.logger.debug('Added MCDReforgedFlag {}'.format(flag), option=DebugOption.MCDR)
def remove_flag(self, flag: MCDReforgedFlag):
self.flags &= ~flag
self.logger.debug('Removed MCDReforgedFlag {}'.format(flag), option=DebugOption.MCDR)
# State
def server_in_state(self, states):
return self.server_state.in_state(states)
def mcdr_in_state(self, states):
return self.mcdr_state.in_state(states)
def is_initialized(self):
return self.mcdr_in_state(MCDReforgedState.INITIALIZED)
def set_server_state(self, state):
self.server_state = state
self.logger.debug('Server state has set to "{}"'.format(state), option=DebugOption.MCDR)
def set_mcdr_state(self, state):
self.mcdr_state = state
self.logger.debug('MCDR state has set to "{}"'.format(state), option=DebugOption.MCDR)
def should_keep_looping(self):
"""
A criterion for sub threads to determine if it should keep looping
:rtype: bool
"""
if self.server_in_state(ServerState.STOPPED):
if self.is_interrupt(): # if interrupted and stopped
return False
if self.should_exit_after_stop(): # natural server stop, or server_interface.exit() by plugin
return False
return True
return not self.is_mcdr_exit()
# --------------------------
# Server Controls
# --------------------------
def start_server(self):
"""
try to start the server process
return True if the server process has started successfully
return False if the server is not able to start
:return: a bool as above
:rtype: bool
"""
with self.starting_server_lock:
if self.is_interrupt():
self.logger.warning(self.tr('mcdr_server.start_server.already_interrupted'))
return False
if self.is_server_running():
self.logger.warning(self.tr('mcdr_server.start_server.start_twice'))
return False
if self.is_mcdr_about_to_exit():
self.logger.warning(self.tr('mcdr_server.start_server.about_to_exit'))
return False
cwd = self.config['working_directory']
if not os.path.isdir(cwd):
self.logger.error(self.tr('mcdr_server.start_server.cwd_not_existed', cwd))
return False
try:
start_command = self.config['start_command']
self.logger.info(self.tr('mcdr_server.start_server.starting', start_command))
self.process = Popen(start_command, cwd=self.config['working_directory'], stdin=PIPE, stdout=PIPE, stderr=STDOUT, shell=True)
except:
self.logger.exception(self.tr('mcdr_server.start_server.start_fail'))
return False
else:
self.__on_server_start()
return True
def __kill_server(self):
"""
Kill the server process group
"""
if self.process and self.process.poll() is None:
self.logger.info(self.tr('mcdr_server.kill_server.killing'))
try:
for child in psutil.Process(self.process.pid).children(recursive=True):
child.kill()
self.logger.info(self.tr('mcdr_server.kill_server.process_killed', child.pid))
except psutil.NoSuchProcess:
pass
self.process.kill()
self.logger.info(self.tr('mcdr_server.kill_server.process_killed', self.process.pid))
else:
raise IllegalCallError("Server process has already been terminated")
def interrupt(self) -> bool:
"""
Interrupt MCDR
The first call will softly stop the server and the later calls will kill the server
Return if it's the first try
"""
first_interrupt = not self.is_interrupt()
self.logger.info('Interrupting, first strike = {}'.format(first_interrupt))
if self.is_server_running():
self.stop(forced=not first_interrupt)
self.with_flag(MCDReforgedFlag.INTERRUPT)
return first_interrupt
def stop(self, forced: bool = False):
"""
Stop the server
:param forced: an optional bool. If it's False (default) MCDR will stop the server by sending the STOP_COMMAND from the
current handler. If it's True MCDR will just kill the server process group
"""
with self.stop_lock:
if not self.is_server_running():
self.logger.warning(self.tr('mcdr_server.stop.stop_when_stopped'))
return
self.set_server_state(ServerState.STOPPING)
if not forced:
try:
self.send(self.server_handler_manager.get_current_handler().get_stop_command())
except:
self.logger.error(self.tr('mcdr_server.stop.stop_fail'))
forced = True
if forced:
try:
self.__kill_server()
except IllegalCallError:
pass
# --------------------------
# Server Logics
# --------------------------
def __on_server_start(self):
self.set_server_state(ServerState.RUNNING)
self.with_flag(MCDReforgedFlag.EXIT_AFTER_STOP) # Set after server state is set to RUNNING, or MCDR might have a chance to exit if the server is started by other thread
self.logger.info(self.tr('mcdr_server.start_server.pid_info', self.process.pid))
self.reactor_manager.on_server_start()
self.plugin_manager.dispatch_event(MCDRPluginEvents.SERVER_START, ())
def __on_server_stop(self):
return_code = self.process.poll()
self.logger.info(self.tr('mcdr_server.on_server_stop.show_stopcode', return_code))
try:
self.process.stdin.close()
except Exception as e:
self.logger.warning('Error when closing stdin: {}'.format(e))
try:
self.process.stdout.close()
except Exception as e:
self.logger.warning('Error when closing stdout: {}'.format(e))
self.process = None
self.set_server_state(ServerState.STOPPED)
self.remove_flag(MCDReforgedFlag.SERVER_STARTUP | MCDReforgedFlag.SERVER_RCON_READY) # removes this two
self.reactor_manager.on_server_stop()
self.plugin_manager.dispatch_event(MCDRPluginEvents.SERVER_STOP, (return_code,), block=True)
if self.is_interrupt():
self.logger.info(self.tr('mcdr_server.on_server_stop.user_interrupted'))
else:
self.logger.info(self.tr('mcdr_server.on_server_stop.server_stop'))
def send(self, text, ending='\n', encoding=None):
"""
Send a text to server's stdin if the server is running
:param text: A str or a bytes you want to send. if text is a str then it will attach the ending parameter to its
back
:param str ending: The suffix of a command with a default value \n
:param str encoding: The encoding method for the text. If it's not given used the method in config
"""
if encoding is None:
encoding = self.encoding_method
if isinstance(text, str):
encoded_text = (text + ending).encode(encoding)
elif isinstance(text, bytes):
encoded_text = text
else:
raise TypeError()
if self.is_server_running():
self.process.stdin.write(encoded_text)
self.process.stdin.flush()
else:
self.logger.warning(self.tr('mcdr_server.send.send_when_stopped'))
self.logger.warning(self.tr('mcdr_server.send.send_when_stopped.text', text if len(text) <= 32 else text[:32] + '...'))
def __receive(self):
"""
Try to receive a str from server's stdout. This will block the current thread
If server has stopped it will wait up to 10s for the server process to exit, then raise a ServerStopped exception
:rtype: str
:raise: ServerStopped
"""
try:
text = next(iter(self.process.stdout)) # type: bytes
except StopIteration: # server process has stopped
for i in range(core_constant.WAIT_TIME_AFTER_SERVER_STDOUT_END_SEC * 10):
if self.process.poll() is not None:
break
time.sleep(0.1)
if i % 10 == 0:
self.logger.info(self.tr('mcdr_server.receive.wait_stop'))
raise ServerStopped()
else:
try:
decoded_text = text.decode(self.decoding_method) # type: str
except:
self.logger.error(self.tr('mcdr_server.receive.decode_fail', text))
raise
return decoded_text.rstrip('\n\r').lstrip('\n\r')
def __tick(self):
"""
ticking MCDR:
try to receive a new line from server's stdout and parse / display / process the text
"""
try:
text = self.__receive()
except ServerStopped:
self.__on_server_stop()
return
try:
text = self.server_handler_manager.get_current_handler().pre_parse_server_stdout(text)
except:
self.logger.warning(self.tr('mcdr_server.tick.pre_parse_fail'))
parsed_result: Info
try:
parsed_result = self.server_handler_manager.get_current_handler().parse_server_stdout(text)
except:
if self.logger.should_log_debug(option=DebugOption.HANDLER): # traceback.format_exc() is costly
self.logger.debug('Fail to parse text "{}" from stdout of the server, using raw handler'.format(text), no_check=True)
for line in traceback.format_exc().splitlines():
self.logger.debug(' {}'.format(line), no_check=True)
parsed_result = self.server_handler_manager.get_basic_handler().parse_server_stdout(text)
else:
if self.logger.should_log_debug(option=DebugOption.HANDLER):
self.logger.debug('Parsed text from server stdout:', no_check=True)
for line in parsed_result.format_text().splitlines():
self.logger.debug(' {}'.format(line), no_check=True)
self.server_handler_manager.detect_text(text)
self.reactor_manager.put_info(parsed_result)
def __on_mcdr_start(self):
self.watch_dog.start()
self.task_executor.start()
self.preference_manager.load_preferences()
self.plugin_manager.register_permanent_plugins()
self.task_executor.execute_on_thread(self.load_plugins, block=True)
self.plugin_manager.dispatch_event(MCDRPluginEvents.MCDR_START, ())
if not self.config['disable_console_thread']:
self.console_handler.start()
else:
self.logger.info(self.tr('mcdr_server.on_mcdr_start.console_disabled'))
if not self.start_server():
raise ServerStartError()
self.update_helper.start()
self.server_handler_manager.start_handler_detection()
self.set_mcdr_state(MCDReforgedState.RUNNING)
def __on_mcdr_stop(self):
try:
self.set_mcdr_state(MCDReforgedState.PRE_STOPPED)
self.logger.info(self.tr('mcdr_server.on_mcdr_stop.info'))
self.plugin_manager.dispatch_event(MCDRPluginEvents.PLUGIN_UNLOADED, ())
self.task_executor.wait_till_finish_all_task()
with self.watch_dog.pausing(): # it's ok for plugins to take some time
self.plugin_manager.dispatch_event(MCDRPluginEvents.MCDR_STOP, (), block=True)
self.console_handler.stop()
self.logger.info(self.tr('mcdr_server.on_mcdr_stop.bye'))
except KeyboardInterrupt: # I don't know why there sometimes will be a KeyboardInterrupt if MCDR is stopped by ctrl-c
pass
except:
self.logger.exception(self.tr('mcdr_server.on_mcdr_stop.stop_error'))
finally:
self.set_mcdr_state(MCDReforgedState.STOPPED)
def start(self):
"""
The entry method to start MCDR
Try to start the server. if succeeded the console thread will start and MCDR will start ticking
:raise: IllegalStateError if MCDR is in wrong state
:raise: ServerStartError if the server is already running or start_server has been called by other
"""
if not self.mcdr_in_state(MCDReforgedState.INITIALIZED):
if self.mcdr_in_state(MCDReforgedState.INITIALIZING):
raise IllegalStateError('This instance is not fully initialized')
else:
raise IllegalStateError('MCDR can only start once')
self.__main_loop()
return self.process
def __main_loop(self):
"""
The main loop of MCDR
"""
self.__on_mcdr_start()
while self.should_keep_looping():
try:
if self.is_server_running():
self.__tick()
else:
time.sleep(0.01)
except KeyboardInterrupt:
self.interrupt()
except:
if self.is_interrupt():
break
else:
self.logger.critical(self.tr('mcdr_server.run.error'), exc_info=True)
self.__on_mcdr_stop()
def connect_rcon(self):
self.rcon_manager.disconnect()
if self.config['rcon']['enable'] and self.is_server_rcon_ready():
self.rcon_manager.connect(self.config['rcon']['address'], self.config['rcon']['port'], self.config['rcon']['password'])