houdini/Houdini/HoudiniFactory.py

import asyncio
import os
import sys
import pkgutil
import importlib

from Houdini.Spheniscidae import Spheniscidae
from Houdini.Penguin import Penguin
from Houdini import PenguinStringCompiler
import config

from aiologger import Logger
from aiologger.handlers.files import AsyncTimedRotatingFileHandler, RolloverInterval, AsyncFileHandler
from aiologger.handlers.streams import AsyncStreamHandler

import logging
from logging.handlers import RotatingFileHandler

import aioredis
from aiocache import SimpleMemoryCache
from watchdog.observers import Observer

from gino import Gino

try:
    import uvloop
    asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
except ImportError:
    uvloop = None

import Houdini.Handlers
from Houdini.Handlers import listeners_from_module
from Houdini.Events.HandlerFileEvent import HandlerFileEventHandler


class HoudiniFactory:

    def __init__(self, **kwargs):
        self.server = None
        self.redis = None
        self.config = None
        self.cache = None
        self.db = Gino()
        self.peers_by_ip = {}

        self.server_name = kwargs['server']
        self.server_config = None

        self.logger = None

        self.client_class = Spheniscidae
        self.penguin_string_compiler = None

        self.penguins_by_id = {}
        self.penguins_by_username = {}

        self.xt_listeners, self.xml_listeners = {}, {}

    async def start(self):
        self.config = config

        self.server_config = self.config.servers[self.server_name]

        self.server = await asyncio.start_server(
            self.client_connected, self.server_config['Address'],
            self.server_config['Port']
        )

        await self.db.set_bind('postgresql://{}:{}@{}/{}'.format(
            self.config.database['Username'], self.config.database['Password'],
            self.config.database['Address'],
            self.config.database['Name']))

        general_log_directory = os.path.dirname(self.server_config["Logging"]["General"])
        errors_log_directory = os.path.dirname(self.server_config["Logging"]["Errors"])

        if not os.path.exists(general_log_directory):
            os.mkdir(general_log_directory)

        if not os.path.exists(errors_log_directory):
            os.mkdir(errors_log_directory)

        if sys.platform != 'win32':
            self.logger = Logger.with_default_handlers(name='Houdini')
            universal_handler = AsyncTimedRotatingFileHandler(
                filename=self.server_config['Logging']['General'],
                backup_count=3,
                when=RolloverInterval.HOURS
            )
            error_handler = AsyncFileHandler(filename=self.server_config['Logging']['General'])
            console_handler = AsyncStreamHandler(stream=sys.stdout)
        else:
            self.logger = logging.getLogger('Houdini')
            universal_handler = RotatingFileHandler(self.server_config['Logging']['General'],
                                                    maxBytes=2097152, backupCount=3, encoding='utf-8')

            error_handler = logging.FileHandler(self.server_config['Logging']['Errors'])
            console_handler = logging.StreamHandler(stream=sys.stdout)

        log_formatter = logging.Formatter('%(asctime)s [%(levelname)-5.5s]  %(message)s')
        error_handler.setLevel(logging.ERROR)

        universal_handler.setFormatter(log_formatter)
        console_handler.setFormatter(log_formatter)

        self.logger.addHandler(universal_handler)
        self.logger.addHandler(console_handler)

        level = logging.getLevelName(self.server_config['Logging']['Level'])
        self.logger.setLevel(level)

        self.logger.info('Houdini module instantiated')

        if self.server_config['World']:
            self.redis = await aioredis.create_redis_pool('redis://{}:{}'.format(
                self.config.redis['Address'], self.redis['Port']),
                minsize=5, maxsize=10)

            await self.redis.delete('{}.players'.format(self.server_name))
            await self.redis.delete('{}.population'.format(self.server_name))

            self.cache = SimpleMemoryCache(namespace='houdini', ttl=self.server_config['CacheExpiry'])

            self.client_class = Penguin
            self.penguin_string_compiler = PenguinStringCompiler()

            self.load_handler_modules(exclude_load="Houdini.Handlers.Login.Login")
            self.logger.info('World server started')
        else:
            self.load_handler_modules("Houdini.Handlers.Login.Login")
            self.logger.info('Login server started')

        handlers_path = './Houdini{}Handlers'.format(os.path.sep)
        plugins_path = './Houdini{}Plugins'.format(os.path.sep)
        self.configure_obvservers([handlers_path, HandlerFileEventHandler])

        self.logger.info('Listening on {}:{}'.format(self.server_config['Address'], self.server_config['Port']))

        async with self.server:
            await self.server.serve_forever()

    async def client_connected(self, reader, writer):
        client_object = self.client_class(self, reader, writer)
        await client_object.run()

    def load_handler_modules(self, strict_load=None, exclude_load=None):
        for handler_module in self.get_package_modules(Houdini.Handlers):
            if not (strict_load and handler_module not in strict_load or exclude_load and handler_module in exclude_load):
                if handler_module not in sys.modules.keys():
                    module = importlib.import_module(handler_module)
                    listeners_from_module(self.xt_listeners, self.xml_listeners, module)

        self.logger.info("Handler modules loaded")

    def get_package_modules(self, package):
        package_modules = []

        for importer, module_name, is_package in pkgutil.iter_modules(package.__path__):
            full_module_name = "{0}.{1}".format(package.__name__, module_name)

            if is_package:
                subpackage_object = importlib.import_module(full_module_name, package=package.__path__)
                subpackage_object_directory = dir(subpackage_object)

                if "Plugin" in subpackage_object_directory:
                    package_modules.append((subpackage_object, module_name))
                    continue

                sub_package_modules = self.get_package_modules(subpackage_object)

                package_modules = package_modules + sub_package_modules
            else:
                package_modules.append(full_module_name)

        return package_modules

    def configure_obvservers(self, *observer_settings):
        for observer_path, observer_class in observer_settings:
            event_observer = Observer()
            event_observer.schedule(observer_class(self), observer_path, recursive=True)
            event_observer.start()