我正在使用 FASTApi 并尝试实现一个端点,该端点可启动一项工作。一旦作业开始,端点将被“锁定”,直到前一个作业完成。到目前为止它是这样实现的:
myapp.lock = threading.Lock()
@myapp.get("/jobs")
def start_job(some_args):
if myapp.lock.acquire(False):
th = threading.Thread(target=job,kwargs=some_args)
th.start()
return "Job started"
else:
raise HTTPException(status_code=400,detail="Job already running.")
因此,当作业开始时,将使用方法 job 创建一个线程:
def job(some_args):
try:
#doing some stuff, creating objects and writing to files
finally:
myapp.lock.release()
到目前为止一切顺利,端点正在工作,只要作业正在运行,就会启动作业并锁定。 但我的问题是,尽管作业“完成”并释放了锁,但线程仍然存在。我希望线程在执行后会自行关闭。也许问题在于 myapp 让它保持活力?我怎样才能阻止它?
答案 0 :(得分:0)
我想出了这种解决方案:
myapp.lock = False
@myapp.get("/jobs")
async def start_job(some_args, background_tasks: BackgroundTasks):
if not myapp.lock:
background_tasks.add_task(job, some_args)
return "Job started"
else:
raise HTTPException(status_code=400,detail="Job already running.")
def job(some_args):
try:
myapp.lock = True
#doing some stuff, creating objects and writing to files
finally:
myapp.lock = False