daniil-berg/asyncio-taskpool
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refactoring, additional command, improvements

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This commit is contained in:
Daniil Fajnberg 2022-02-04 17:41:10 +01:00
parent b3b95877fb
commit ed376b6f82
3 changed files with 37 additions and 16 deletions
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15
src/asyncio_taskpool/client.py
View File

@ -22,14 +22,21 @@ class ControlClient(ABC):
msg = input("> ").strip().lower()
except EOFError:
msg = constants.CLIENT_EXIT
except KeyboardInterrupt:
print()
return
if msg == constants.CLIENT_EXIT:
writer.close()
self._connected = False
return
writer.write(msg.encode())
await writer.drain()
print("Command sent; awaiting response...")
print("Server response:", (await reader.read(constants.MSG_BYTES)).decode())
try:
writer.write(msg.encode())
await writer.drain()
except ConnectionError as e:
self._connected = False
print(e, file=sys.stderr)
return
print((await reader.read(constants.MSG_BYTES)).decode())
async def start(self):
reader, writer = await self.open_connection(**self._conn_kwargs)

1
src/asyncio_taskpool/constants.py
View File

@ -3,4 +3,5 @@ MSG_BYTES = 1024
CMD_START = 'start'
CMD_STOP = 'stop'
CMD_STOP_ALL = 'stop_all'
CMD_SIZE = 'size'
CLIENT_EXIT = 'exit'

37
src/asyncio_taskpool/server.py
View File

@ -45,44 +45,57 @@ class ControlServer(ABC):
self._server_kwargs = server_kwargs
self._server: Optional[AbstractServer] = None
def _start_tasks(self, num: int, writer: StreamWriter) -> None:
log.debug("Client requests starting %s tasks", num)
def _start_tasks(self, writer: StreamWriter, num: int = None) -> None:
if num is None:
num = 1
log.debug("%s requests starting %s %s", self.client_class.__name__, num, tasks_str(num))
self._pool.start(num)
size = self._pool.size
writer.write(f"{num} new {tasks_str(num)} started! {size} {tasks_str(size)} active now.".encode())
def _stop_tasks(self, num: int, writer: StreamWriter) -> None:
log.debug("Client requests stopping %s tasks", num)
def _stop_tasks(self, writer: StreamWriter, num: int = None) -> None:
if num is None:
num = 1
log.debug("%s requests stopping %s %s", self.client_class.__name__, num, tasks_str(num))
num = self._pool.stop(num) # the requested number may be greater than the total number of running tasks
size = self._pool.size
writer.write(f"{num} {tasks_str(num)} stopped! {size} {tasks_str(size)} left.".encode())
def _stop_all_tasks(self, writer: StreamWriter) -> None:
log.debug("Client requests stopping all tasks")
log.debug("%s requests stopping all tasks", self.client_class.__name__)
num = self._pool.stop_all()
writer.write(f"Remaining {num} {tasks_str(num)} stopped!".encode())
async def _client_connected_cb(self, reader: StreamReader, writer: StreamWriter) -> None:
log.debug("%s connected", self.client_class.__name__)
writer.write(f"{self.__class__.__name__} for {self._pool}".encode())
await writer.drain()
while True:
def _pool_size(self, writer: StreamWriter) -> None:
log.debug("%s requests pool size", self.client_class.__name__)
writer.write(f'{self._pool.size}'.encode())
async def _listen(self, reader: StreamReader, writer: StreamWriter) -> None:
while self._server.is_serving():
msg = (await reader.read(constants.MSG_BYTES)).decode().strip()
if not msg:
log.debug("%s disconnected", self.client_class.__name__)
break
cmd, arg = get_cmd_arg(msg)
if cmd == constants.CMD_START:
self._start_tasks(arg, writer)
self._start_tasks(writer, arg)
elif cmd == constants.CMD_STOP:
self._stop_tasks(arg, writer)
self._stop_tasks(writer, arg)
elif cmd == constants.CMD_STOP_ALL:
self._stop_all_tasks(writer)
elif cmd == constants.CMD_SIZE:
self._pool_size(writer)
else:
log.debug("%s sent invalid command: %s", self.client_class.__name__, msg)
writer.write(b"Invalid command!")
await writer.drain()
async def _client_connected_cb(self, reader: StreamReader, writer: StreamWriter) -> None:
log.debug("%s connected", self.client_class.__name__)
writer.write(f"{self.__class__.__name__} for {self._pool}".encode())
await writer.drain()
await self._listen(reader, writer)
async def _serve_forever(self) -> None:
try:
async with self._server: