Files
snake-python/server/blueprints/battlesnake.py
T
daniel156161 4403978537
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perf(battlesnake): defer ordered lifecycle bookkeeping
- Acknowledge start and end without waiting for persistence or dashboards.
- Keep runtime creation and finished-game removal on the response path.
- Serialize start, turn, and end bookkeeping per game in Quart tasks.
- Capture turn thinking before scheduling deferred persistence.
- Defer start metrics, logging, and stale-game pruning.
- Run legacy history exports in a worker thread.
- Record results and end metrics even when history export fails.
- Drain pending bookkeeping before closing storage during shutdown.
- Test sub-500 ms responses with slow backends and real SQLite.
- Cover event ordering, export failures, and rejected user agents.
2026-11-03 10:38:20 +01:00

114 lines
4.2 KiB
Python

from typing import cast
import asyncio, json, time, os
from quart import Blueprint, request, jsonify
from quart_common.web.decorators import require_user_agent
from quart_common.web.logger import await_log
from snakes import DEFAULT_SNAKE_CONFIG
from server.GameBoard import GameBoard
from server.Files import read_file
lazy from server.Server import Server
def create_battlesnake_blueprint(server:'Server') -> Blueprint:
blueprint = Blueprint('battlesnake', __name__)
async def _override_snake_config_with_environment_variables(config:dict[str, str]) -> dict[str, str]:
print(config)
config['version'] = server.snake_version
for key in ('author', 'color', 'head', 'tail'):
value = os.environ.get(f'SNAKE_{key.upper()}')
if value is not None:
config[key] = value
version_override = os.environ.get('SNAKE_VERSION')
if version_override is not None:
config['version'] = version_override
return config
@blueprint.get('/')
async def on_info():
server.metrics_collector.record_http_request('info')
snake_config = cast(dict[str, str]|None, await read_file(server.config_file, json.load))
if not snake_config:
snake_json = await _override_snake_config_with_environment_variables(DEFAULT_SNAKE_CONFIG)
else:
snake_json = await _override_snake_config_with_environment_variables(snake_config)
await await_log(server.logger.info(f'INFO Snake: {snake_json}'))
return snake_json
@blueprint.post('/start')
@require_user_agent(("BattlesnakeEngine", "BattlesnakeArena"), abort_code=404)
async def on_start():
server.metrics_collector.record_http_request('start')
game_state = await request.get_json()
game_board = await server.game_runtime.create_game_board(game_state, publish_metrics=False)
active_count = len(server.game_runtime.running_games)
server.game_lifecycle.submit(
game_state['game']['id'],
lambda: server.game_lifecycle.started(game_state, game_board, active_count),
)
return 'ok'
@blueprint.post('/move')
@require_user_agent(("BattlesnakeEngine", "BattlesnakeArena"), abort_code=404)
async def on_move():
server.metrics_collector.record_http_request('move')
game_state = await request.get_json()
move_started = time.perf_counter()
game_id = game_state['game']['id']
timeout_ms = int(game_state.get('game', {}).get('timeout', 500))
budget_sec = max(0.05, (timeout_ms - 50) / 1000.0)
next_move = None
game_board = None
try:
async with asyncio.timeout(budget_sec):
game_board = cast(GameBoard, await server.game_runtime.get_game_board(game_state))
loop = asyncio.get_running_loop()
next_move = await loop.run_in_executor(None, game_board.snake_neat_make_a_move)
except TimeoutError:
await await_log(server.logger.warning(f'MOVE TIMEOUT: turn={game_state.get("turn")}, game={game_id}, returning fallback {next_move!r}'))
thinking = server.gameplay_tracking._extract_latest_snake_thinking(game_board)
server.game_lifecycle.submit(
game_id, lambda: server.game_lifecycle.turn(game_state, next_move, thinking),
)
elapsed_ms = (time.perf_counter() - move_started) * 1000.0
await server.metrics_collector.record_move(next_move, elapsed_ms)
if server.debug:
await await_log(server.logger.debug(f'TURN: {game_state['turn']:3}, MOVE: {next_move:5}'))
return {'move': next_move}
@blueprint.post('/end')
@require_user_agent(("BattlesnakeEngine", "BattlesnakeArena"), abort_code=404)
async def on_end():
server.metrics_collector.record_http_request('end')
game_state = await request.get_json()
game_id = game_state['game']['id']
game_board = server.game_runtime.running_games.get(game_id)
if game_board is not None:
game_board.read_game_data(game_state)
game_board.end_game(game_state)
await server.game_runtime.delete_game_board(game_state)
server.game_lifecycle.submit(
game_id, lambda: server.game_lifecycle.ended(game_state, game_board),
)
return 'ok'
# @blueprint.get('/cleanup')
# async def cleanup():
# results = server._cleanup_database()
# return jsonify(data=json.loads(results), status=200)
return blueprint