""" BAPSicle Server Next-gen audio playout server for University Radio York playout, based on WebStudio interface. Flask Server Authors: Matthew Stratford Michael Grace Date: October, November 2020 """ from file_manager import FileManager import multiprocessing from multiprocessing.queues import Queue import multiprocessing.managers as m import time from typing import Any, Optional import json from setproctitle import setproctitle from helpers.os_environment import isBundelled, isMacOS if not isMacOS(): # Rip, this doesn't like threading on MacOS. import pyttsx3 if isBundelled(): import build import package from typing import Dict, List from helpers.state_manager import StateManager from helpers.logging_manager import LoggingManager from websocket_server import WebsocketServer from web_server import WebServer from player_handler import PlayerHandler from controllers.mattchbox_usb import MattchBox from helpers.the_terminator import Terminator import player PROCESS_KILL_TIMEOUT_S = 5 setproctitle("server.py") """ Proxy Manager to proxy Class Objects into multiprocessing processes, instead of making a copy. """ class ProxyManager(m.BaseManager): pass # Pass is really enough. Nothing needs to be done here. class BAPSicleServer: default_state = { "server_version": "unknown", "server_build": "unknown", "server_branch": "unknown", "server_beta": True, "server_name": "URY BAPSicle", "host": "localhost", "port": 13500, "ws_port": 13501, "num_channels": 3, "serial_port": None, "ser_connected": False, "myradio_api_key": None, "myradio_base_url": "https://ury.org.uk/myradio", "myradio_api_url": "https://ury.org.uk/api", "myradio_api_tracklist_source": "", "running_state": "running", "tracklist_mode": "off", } player_to_q: List[Queue] = [] player_from_q: List[Queue] = [] ui_to_q: List[Queue] = [] websocket_to_q: List[Queue] = [] controller_to_q: List[Queue] = [] file_to_q: List[Queue] = [] api_from_q: Queue api_to_q: Queue player: List[multiprocessing.Process] = [] websockets_server: Optional[multiprocessing.Process] = None controller_handler: Optional[multiprocessing.Process] = None player_handler: Optional[multiprocessing.Process] = None file_manager: Optional[multiprocessing.Process] = None webserver: Optional[multiprocessing.Process] = None def __init__(self): while True: self.startServer() self.check_processes() self.stopServer() if self.state.get()["running_state"] == "restarting": continue break def check_processes(self): terminator = Terminator() log_function = self.logger.log.info while not terminator.terminate and self.state.get()["running_state"] == "running": for channel in range(self.state.get()["num_channels"]): if not self.player[channel] or not self.player[channel].is_alive(): log_function("Player {} not running, (re)starting.".format(channel)) self.player[channel] = multiprocessing.Process( target=player.Player, args=(channel, self.player_to_q[channel], self.player_from_q[channel], self.state) ) self.player[channel].start() if not self.player_handler or not self.player_handler.is_alive(): log_function("Player Handler not running, (re)starting.") self.player_handler = multiprocessing.Process( target=PlayerHandler, args=(self.player_from_q, self.websocket_to_q, self.ui_to_q, self.controller_to_q, self.file_to_q), ) self.player_handler.start() if not self.file_manager or not self.file_manager.is_alive(): log_function("File Manager not running, (re)starting.") self.file_manager = multiprocessing.Process( target=FileManager, args=(self.file_to_q, self.state), ) self.file_manager.start() if not self.websockets_server or not self.websockets_server.is_alive(): log_function("Websocket Server not running, (re)starting.") self.websockets_server = multiprocessing.Process( target=WebsocketServer, args=(self.player_to_q, self.websocket_to_q, self.state) ) self.websockets_server.start() if not self.webserver or not self.webserver.is_alive(): log_function("Webserver not running, (re)starting.") self.webserver = multiprocessing.Process( target=WebServer, args=(self.player_to_q, self.ui_to_q, self.state) ) self.webserver.start() if not self.controller_handler or not self.controller_handler.is_alive(): log_function("Controller Handler not running, (re)starting.") self.controller_handler = multiprocessing.Process( target=MattchBox, args=(self.player_to_q, self.controller_to_q, self.state) ) self.controller_handler.start() # After first starting processes, switch logger to error, since any future starts will have been failures. log_function = self.logger.log.error time.sleep(1) def startServer(self): if isMacOS(): multiprocessing.set_start_method("spawn", True) process_title = "startServer" setproctitle(process_title) multiprocessing.current_process().name = process_title self.logger = LoggingManager("BAPSicleServer") # Since we're passing the StateManager across processes, it must be made a manager. # PLEASE NOTE: You can't read attributes directly, use state.get()["var"] and state.update("var", "val") ProxyManager.register("StateManager", StateManager) manager = ProxyManager() manager.start() self.state: StateManager = manager.StateManager("BAPSicleServer", self.logger, self.default_state) self.state.update("running_state", "running") print("Launching BAPSicle...") # TODO: Check these match, if not, trigger any upgrade noticies / welcome self.state.update("server_version", package.VERSION) self.state.update("server_build", package.BUILD) self.state.update("server_branch", package.BRANCH) self.state.update("server_beta", package.BETA) channel_count = self.state.get()["num_channels"] self.player = [None] * channel_count for channel in range(self.state.get()["num_channels"]): self.player_to_q.append(multiprocessing.Queue()) self.player_from_q.append(multiprocessing.Queue()) self.ui_to_q.append(multiprocessing.Queue()) self.websocket_to_q.append(multiprocessing.Queue()) self.controller_to_q.append(multiprocessing.Queue()) self.file_to_q.append(multiprocessing.Queue()) print("Welcome to BAPSicle Server version: {}, build: {}.".format(package.VERSION, package.BUILD)) print("The Server UI is available at http://{}:{}".format(self.state.get()["host"], self.state.get()["port"])) # TODO Move this to player or installer. if False: if not isMacOS(): # Temporary RIP. # Welcome Speech text_to_speach = pyttsx3.init() text_to_speach.save_to_file( """Thank-you for installing BAPSicle - the play-out server from the broadcasting and presenting suite. By default, this server is accepting connections on port 13500 The version of the server service is {} Please refer to the documentation included with this application for further assistance.""".format( config.VERSION ), "dev/welcome.mp3", ) text_to_speach.runAndWait() new_item: Dict[str, Any] = { "channel_weight": 0, "filename": "dev/welcome.mp3", "title": "Welcome to BAPSicle", "artist": "University Radio York", } self.player_to_q[0].put("ADD:" + json.dumps(new_item)) self.player_to_q[0].put("LOAD:0") self.player_to_q[0].put("PLAY") def stopServer(self): print("Stopping BASPicle Server.") print("Stopping Websocket Server") self.websocket_to_q[0].put("WEBSOCKET:QUIT") if self.websockets_server: self.websockets_server.join(timeout=PROCESS_KILL_TIMEOUT_S) del self.websockets_server print("Stopping Players") for q in self.player_to_q: q.put("ALL:QUIT") for player in self.player: player.join(timeout=PROCESS_KILL_TIMEOUT_S) del self.player print("Stopping Web Server") if self.webserver: self.webserver.terminate() self.webserver.join(timeout=PROCESS_KILL_TIMEOUT_S) del self.webserver print("Stopping Player Handler") if self.player_handler: self.player_handler.terminate() self.player_handler.join(timeout=PROCESS_KILL_TIMEOUT_S) del self.player_handler print("Stopping File Manager") if self.file_manager: self.file_manager.terminate() self.file_manager.join(timeout=PROCESS_KILL_TIMEOUT_S) del self.file_manager print("Stopping Controllers") if self.controller_handler: self.controller_handler.terminate() self.controller_handler.join(timeout=PROCESS_KILL_TIMEOUT_S) del self.controller_handler print("Stopped all processes.") if __name__ == "__main__": raise Exception("BAPSicle is a service. Please run it like one.")