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server.py
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server.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
AIM backend server.
"""
# ----------------------------------------------------------------------------
# Imports
# ----------------------------------------------------------------------------
# Standard library modules
import logging
import os
import time
from pathlib import Path
from typing import Any, Dict, Tuple
# Third-party modules
import motor
import tornado.ioloop
import tornado.log
import tornado.options
import tornado.web
import tornado.websocket
from dotenv import load_dotenv
from loguru import logger
from motor.motor_tornado import MotorClient, MotorDatabase
from tornado.log import LogFormatter
from tornado.options import define, options
# First-party modules
from aim.common import configmanager, utils
from aim.handlers import AIMWebSocketHandler
# ----------------------------------------------------------------------------
# Metadata
# ----------------------------------------------------------------------------
__author__ = "Markku Laine"
__date__ = "2022-04-25"
__email__ = "[email protected]"
__version__ = "1.1"
# ----------------------------------------------------------------------------
# Definitions
# ----------------------------------------------------------------------------
define(
"environment", default="development", help="Runtime environment", type=str
)
define("name", default="aim-dev", help="Instance name", type=str)
define("port", default=8888, help="Port to listen on", type=int)
define(
"data_inputs_dir",
default=None,
help="Directory to store input files",
type=Path,
)
define(
"data_results_dir",
default=None,
help="Directory to store result files",
type=Path,
)
define("database_uri", default=None, help="Database URI", type=str)
# In addition, Tornado provides built-in support for the "logging" (level) option
# ----------------------------------------------------------------------------
# Take environment variables from .env
# ----------------------------------------------------------------------------
load_dotenv()
# ----------------------------------------------------------------------------
# Functions
# ----------------------------------------------------------------------------
def parse_environ_options() -> None:
port = os.environ.get("PORT")
data_inputs_dir = os.environ.get("DATA_INPUTS_DIR")
data_results_dir = os.environ.get("DATA_RESULTS_DIR")
if os.environ.get("ENVIRONMENT"):
options["environment"] = os.environ.get("ENVIRONMENT")
if os.environ.get("NAME"):
options["name"] = os.environ.get("NAME")
if port:
options["port"] = int(port)
if data_inputs_dir:
options["data_inputs_dir"] = Path(data_inputs_dir)
if data_results_dir:
options["data_results_dir"] = Path(data_results_dir)
DB_USER = os.environ.get("DB_USER")
DB_PASS = os.environ.get("DB_PASS")
DB_HOST = os.environ.get("DB_HOST")
DB_PORT = os.environ.get("DB_PORT")
DB_NAME = os.environ.get("DB_NAME")
if DB_USER and DB_PASS and DB_HOST and DB_PORT and DB_NAME:
options[
"database_uri"
] = f"mongodb://{DB_USER}:{DB_PASS}@{DB_HOST}:{DB_PORT}/{DB_NAME}?authSource=admin"
def make_app() -> Tuple[MotorDatabase, tornado.web.Application]:
client: MotorClient = motor.motor_tornado.MotorClient(options.database_uri)
db: MotorDatabase = client.get_database()
settings: Dict[str, Any] = {
"db": db,
"debug": True if options.environment == "development" else False,
"websocket_max_message_size": 5242880, # 5 MB
}
return (
db,
tornado.web.Application(
handlers=[
(r"/ws", AIMWebSocketHandler),
],
**settings,
),
)
def set_tornado_logging() -> None:
"""
Tornado root formatter settings.
"""
for handler in logging.getLogger().handlers:
handler.setLevel(configmanager.options.loguru_level) # type: ignore
formatter: LogFormatter = LogFormatter(
fmt="%(color)s%(asctime)s.%(msecs)03dZ | %(levelname)s | %(module)s:%(funcName)s:%(lineno)d | %(end_color)s%(message)s",
datefmt="%Y-%m-%dT%H:%M:%S",
color=True,
)
setattr(formatter, "converter", time.gmtime)
handler.setFormatter(formatter)
def main() -> None:
configmanager.options = configmanager.parser.parse_known_args()[
0
] # Get known options, i.e., Namespace from the tuple
# Parse options
tornado.options.parse_command_line()
# Configure Loguru logger
configmanager.database_sink = lambda msg: db["errors"].insert_one(
{"error": msg}
)
utils.configure_loguru_logger()
# Configure other loggers
set_tornado_logging()
logging.getLogger("tensorflow").setLevel(
logging.CRITICAL
) # Suppress Tensorflow logs
# Use environment variables to override options
parse_environ_options()
# Make application
db, app = make_app()
app.listen(options.port)
logger.info(
"Server '{}' in {} environment is listening on http://localhost:{}".format(
options.name, options.environment, options.port
)
)
# Start application
tornado.ioloop.IOLoop.current().start()
# ----------------------------------------------------------------------------
# Application
# ----------------------------------------------------------------------------
if __name__ == "__main__":
main()