163 lines
4.7 KiB
Python
163 lines
4.7 KiB
Python
import logging
|
|
import os
|
|
import queue
|
|
import select
|
|
import shlex
|
|
import subprocess
|
|
import sys
|
|
import threading
|
|
import traceback
|
|
from enum import Enum
|
|
from typing import Any, Iterator, Type, TypeVar
|
|
from uuid import UUID, uuid4
|
|
|
|
from .errors import ClanError
|
|
|
|
|
|
class Command:
|
|
def __init__(self, log: logging.Logger) -> None:
|
|
self.log: logging.Logger = log
|
|
self.p: subprocess.Popen | None = None
|
|
self._output: queue.SimpleQueue = queue.SimpleQueue()
|
|
self.returncode: int | None = None
|
|
self.done: bool = False
|
|
self.lines: list[str] = []
|
|
|
|
def close_queue(self) -> None:
|
|
if self.p is not None:
|
|
self.returncode = self.p.returncode
|
|
self._output.put(None)
|
|
self.done = True
|
|
|
|
def run(self, cmd: list[str]) -> None:
|
|
self.running = True
|
|
try:
|
|
self.log.debug(f"Running command: {shlex.join(cmd)}")
|
|
self.p = subprocess.Popen(
|
|
cmd,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE,
|
|
encoding="utf-8",
|
|
)
|
|
assert self.p.stdout is not None and self.p.stderr is not None
|
|
os.set_blocking(self.p.stdout.fileno(), False)
|
|
os.set_blocking(self.p.stderr.fileno(), False)
|
|
|
|
while self.p.poll() is None:
|
|
# Check if stderr is ready to be read from
|
|
rlist, _, _ = select.select([self.p.stderr, self.p.stdout], [], [], 0)
|
|
for fd in rlist:
|
|
try:
|
|
for line in fd:
|
|
self.log.debug("stdout: %s", line)
|
|
self.lines.append(line)
|
|
self._output.put(line)
|
|
except BlockingIOError:
|
|
continue
|
|
|
|
if self.p.returncode != 0:
|
|
raise ClanError(f"Failed to run command: {shlex.join(cmd)}")
|
|
|
|
self.log.debug("Successfully ran command")
|
|
finally:
|
|
self.close_queue()
|
|
|
|
|
|
class TaskStatus(str, Enum):
|
|
NOTSTARTED = "NOTSTARTED"
|
|
RUNNING = "RUNNING"
|
|
FINISHED = "FINISHED"
|
|
FAILED = "FAILED"
|
|
|
|
|
|
class BaseTask:
|
|
def __init__(self, uuid: UUID) -> None:
|
|
# constructor
|
|
self.uuid: UUID = uuid
|
|
self.log = logging.getLogger(__name__)
|
|
self.procs: list[Command] = []
|
|
self.status = TaskStatus.NOTSTARTED
|
|
self.logs_lock = threading.Lock()
|
|
self.error: Exception | None = None
|
|
|
|
def _run(self) -> None:
|
|
self.status = TaskStatus.RUNNING
|
|
try:
|
|
self.run()
|
|
except Exception as e:
|
|
# FIXME: fix exception handling here
|
|
traceback.print_exception(*sys.exc_info())
|
|
for proc in self.procs:
|
|
proc.close_queue()
|
|
self.error = e
|
|
self.log.exception(e)
|
|
self.status = TaskStatus.FAILED
|
|
else:
|
|
self.status = TaskStatus.FINISHED
|
|
|
|
def run(self) -> None:
|
|
raise NotImplementedError
|
|
|
|
## TODO: If two clients are connected to the same task,
|
|
def log_lines(self) -> Iterator[str]:
|
|
with self.logs_lock:
|
|
for proc in self.procs:
|
|
if self.status == TaskStatus.FINISHED:
|
|
return
|
|
# process has finished
|
|
if proc.done:
|
|
for line in proc.lines:
|
|
yield line
|
|
else:
|
|
while line := proc._output.get():
|
|
yield line
|
|
|
|
def register_commands(self, num_cmds: int) -> Iterator[Command]:
|
|
for _ in range(num_cmds):
|
|
cmd = Command(self.log)
|
|
self.procs.append(cmd)
|
|
|
|
for cmd in self.procs:
|
|
yield cmd
|
|
|
|
|
|
# TODO: We need to test concurrency
|
|
class TaskPool:
|
|
def __init__(self) -> None:
|
|
self.lock: threading.RLock = threading.RLock()
|
|
self.pool: dict[UUID, BaseTask] = {}
|
|
|
|
def __getitem__(self, uuid: UUID) -> BaseTask:
|
|
with self.lock:
|
|
return self.pool[uuid]
|
|
|
|
def __setitem__(self, uuid: UUID, task: BaseTask) -> None:
|
|
with self.lock:
|
|
if uuid in self.pool:
|
|
raise KeyError(f"Task with uuid {uuid} already exists")
|
|
if type(uuid) is not UUID:
|
|
raise TypeError("uuid must be of type UUID")
|
|
self.pool[uuid] = task
|
|
|
|
|
|
POOL: TaskPool = TaskPool()
|
|
|
|
|
|
def get_task(uuid: UUID) -> BaseTask:
|
|
global POOL
|
|
return POOL[uuid]
|
|
|
|
|
|
T = TypeVar("T", bound="BaseTask")
|
|
|
|
|
|
def create_task(task_type: Type[T], *args: Any) -> T:
|
|
global POOL
|
|
|
|
uuid = uuid4()
|
|
|
|
task = task_type(uuid, *args)
|
|
threading.Thread(target=task._run).start()
|
|
POOL[uuid] = task
|
|
return task
|