92 lines
3.4 KiB
Python
92 lines
3.4 KiB
Python
import signal
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import logging
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import asyncio
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from concurrent.futures.thread import ThreadPoolExecutor
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import typing
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import lbry
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from lbry.wallet.server.mempool import MemPool
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from lbry.wallet.server.block_processor import BlockProcessor
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from lbry.wallet.server.leveldb import LevelDB
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from lbry.wallet.server.session import LBRYSessionManager
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from lbry.prometheus import PrometheusServer
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class Server:
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def __init__(self, env):
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self.env = env
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self.log = logging.getLogger(__name__).getChild(self.__class__.__name__)
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self.shutdown_event = asyncio.Event()
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self.cancellable_tasks = []
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self.daemon = daemon = env.coin.DAEMON(env.coin, env.daemon_url)
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self.db = db = LevelDB(env)
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self.mempool = mempool = MemPool(env.coin, daemon, db)
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self.bp = bp = BlockProcessor(env, db, daemon, mempool, self.shutdown_event)
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self.prometheus_server: typing.Optional[PrometheusServer] = None
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self.session_mgr = LBRYSessionManager(
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env, db, bp, daemon, mempool, self.shutdown_event
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)
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self._indexer_task = None
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async def start(self):
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env = self.env
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min_str, max_str = env.coin.SESSIONCLS.protocol_min_max_strings()
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self.log.info(f'software version: {lbry.__version__}')
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self.log.info(f'supported protocol versions: {min_str}-{max_str}')
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self.log.info(f'event loop policy: {env.loop_policy}')
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self.log.info(f'reorg limit is {env.reorg_limit:,d} blocks')
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await self.daemon.height()
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def _start_cancellable(run, *args):
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_flag = asyncio.Event()
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self.cancellable_tasks.append(asyncio.ensure_future(run(*args, _flag)))
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return _flag.wait()
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await self.start_prometheus()
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if self.env.udp_port:
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await self.bp.status_server.start(
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0, bytes.fromhex(self.bp.coin.GENESIS_HASH)[::-1], self.env.country,
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self.env.host, self.env.udp_port, self.env.allow_lan_udp
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)
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await _start_cancellable(self.bp.fetch_and_process_blocks)
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await self.db.populate_header_merkle_cache()
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await _start_cancellable(self.mempool.keep_synchronized)
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await _start_cancellable(self.session_mgr.serve, self.mempool)
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async def stop(self):
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for task in reversed(self.cancellable_tasks):
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task.cancel()
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await asyncio.wait(self.cancellable_tasks)
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if self.prometheus_server:
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await self.prometheus_server.stop()
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self.prometheus_server = None
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self.shutdown_event.set()
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await self.daemon.close()
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def run(self):
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loop = asyncio.get_event_loop()
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executor = ThreadPoolExecutor(1)
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loop.set_default_executor(executor)
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def __exit():
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raise SystemExit()
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try:
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loop.add_signal_handler(signal.SIGINT, __exit)
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loop.add_signal_handler(signal.SIGTERM, __exit)
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loop.run_until_complete(self.start())
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loop.run_until_complete(self.shutdown_event.wait())
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except (SystemExit, KeyboardInterrupt):
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pass
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finally:
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loop.run_until_complete(self.stop())
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executor.shutdown(True)
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async def start_prometheus(self):
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if not self.prometheus_server and self.env.prometheus_port:
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self.prometheus_server = PrometheusServer()
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await self.prometheus_server.start("0.0.0.0", self.env.prometheus_port)
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