forked from LBRYCommunity/lbry-sdk
switch_to_fastest
This commit is contained in:
Jack Robison
Victor Shyba
parent
97c0b60a22
commit
8657a35fd7
1 changed files with 49 additions and 25 deletions
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@ -40,11 +40,12 @@ class ClientSession(BaseClientSession):
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return None
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return self.transport.get_extra_info('peername')
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async def send_timed_server_version_request(self, args=()):
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async def send_timed_server_version_request(self, args=(), timeout=None):
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timeout = timeout or self.timeout
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log.debug("send version request to %s:%i", *self.server)
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start = perf_counter()
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result = await asyncio.wait_for(
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super().send_request('server.version', args), timeout=self.timeout
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super().send_request('server.version', args), timeout=timeout
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)
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current_response_time = perf_counter() - start
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response_sum = (self.response_time or 0) * self._response_samples + current_response_time
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@ -52,18 +53,28 @@ class ClientSession(BaseClientSession):
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self._response_samples += 1
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return result
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async def send_request(self, method, args=()):
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async def send_request(self, method, args=(), timeout=None):
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timeout = timeout or self.timeout
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self.pending_amount += 1
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try:
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if method == 'server.version':
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return await self.send_timed_server_version_request(args)
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return await self.send_timed_server_version_request(args, timeout)
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return await asyncio.wait_for(
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super().send_request(method, args), timeout=self.timeout
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super().send_request(method, args), timeout=timeout
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)
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except RPCError as e:
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log.warning("Wallet server (%s:%i) returned an error. Code: %s Message: %s",
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*self.server, *e.args)
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raise e
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except ConnectionError:
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log.warning("connection to %s:%i lost", *self.server)
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self.synchronous_close()
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raise asyncio.CancelledError(f"connection to {self.server[0]}:{self.server[1]} lost")
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except asyncio.TimeoutError:
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raise
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except asyncio.CancelledError:
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self.synchronous_close()
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raise
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finally:
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self.pending_amount -= 1
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@ -83,19 +94,16 @@ class ClientSession(BaseClientSession):
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except (asyncio.TimeoutError, OSError):
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await self.close()
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retry_delay = min(60, retry_delay * 2)
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log.warning("Wallet server timeout (retry in %s seconds): %s:%d", retry_delay, *self.server)
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log.debug("Wallet server timeout (retry in %s seconds): %s:%d", retry_delay, *self.server)
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try:
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await asyncio.wait_for(self.trigger_urgent_reconnect.wait(), timeout=retry_delay)
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except asyncio.TimeoutError:
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pass
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except asyncio.CancelledError:
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self.synchronous_close()
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raise
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finally:
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self.trigger_urgent_reconnect.clear()
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def ensure_server_version(self, required='1.2'):
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return self.send_request('server.version', [__version__, required])
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async def ensure_server_version(self, required='1.2', timeout=3):
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return await self.send_request('server.version', [__version__, required], timeout)
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async def create_connection(self, timeout=6):
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connector = Connector(lambda: self, *self.server)
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@ -120,7 +128,6 @@ class ClientSession(BaseClientSession):
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class BaseNetwork:
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def __init__(self, ledger):
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self.switch_event = asyncio.Event()
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self.config = ledger.config
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self.session_pool = SessionPool(network=self, timeout=self.config.get('connect_timeout', 6))
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self.client: Optional[ClientSession] = None
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@ -141,24 +148,41 @@ class BaseNetwork:
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'blockchain.address.subscribe': self._on_status_controller,
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}
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async def switch_to_fastest(self):
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try:
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client = await asyncio.wait_for(self.session_pool.wait_for_fastest_session(), 30)
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except asyncio.TimeoutError:
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if self.client:
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await self.client.close()
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self.client = None
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for session in self.session_pool.sessions:
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session.synchronous_close()
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log.warning("not connected to any wallet servers")
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return
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if not self.client or client.server_address_and_port != self.client.server_address_and_port:
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current_client = self.client
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self.client = client
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log.info("Switching to SPV wallet server: %s:%d", *self.client.server)
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try:
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self._update_remote_height((await self.subscribe_headers(),))
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log.info("Subscribed to headers: %s:%d", *self.client.server)
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if current_client:
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await current_client.close()
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log.info("Closed connection to %s:%i", *current_client.server)
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except asyncio.TimeoutError:
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if self.client:
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await self.client.close()
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self.client = current_client
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return
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self._on_connected_controller.add(True)
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await asyncio.sleep(30)
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async def start(self):
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self.running = True
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self.session_pool.start(self.config['default_servers'])
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self.on_header.listen(self._update_remote_height)
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while self.running:
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try:
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self.client = await self.session_pool.wait_for_fastest_session()
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self._update_remote_height((await self.subscribe_headers(),))
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log.info("Switching to SPV wallet server: %s:%d", *self.client.server)
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self._on_connected_controller.add(True)
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self.client.on_disconnected.listen(lambda _: self.switch_event.set())
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await self.switch_event.wait()
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self.switch_event.clear()
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except asyncio.CancelledError:
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await self.stop()
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raise
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except asyncio.TimeoutError:
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pass
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await self.switch_to_fastest()
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async def stop(self):
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self.running = False
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