Python Flask关闭事件处理程序

Question

我正在使用Flask作为REST端点,它将一个应用程序请求添加到队列中.然后,队列由第二个线程使用.

server.py

def get_application():
    global app
    app.debug = True
    app.queue = client.Agent()
    app.queue.start()                                                                                                                                                                                                                
    return app

@app.route("/api/v1/test/", methods=["POST"])
def test():
     if request.method == "POST":
        try:
           #add the request parameters to queue
           app.queue.add_to_queue(req)
        except Exception:
            return "All the parameters must be provided" , 400
     return "", 200

     return "Resource not found",404

client.py

class Agent(threading.Thread):

      def __init__(self):
          threading.Thread.__init__(self)
          self.active = True
          self.queue = Queue.Queue(0)


      def run(self):
           while self.active:
              req = self.queue.get()
              #do something


      def add_to_queue(self,request):
           self.queue.put(request)

烧瓶中是否有关闭事件处理程序,以便每当关闭烧瓶应用程序时(例如重新启动apache服务时)我可以干净地关闭使用者线程？

Answer 1

没有app.stop(),如果这是你正在寻找的,但是使用模块atexit你可以做类似的事情:

https://docs.python.org/2/library/atexit.html

考虑一下:

import atexit
#defining function to run on shutdown
def close_running_threads():
    for thread in the_threads:
        thread.join()
    print "Threads complete, ready to finish"
#Register the function to be called on exit
atexit.register(close_running_threads)
#start your process
app.run()

此外笔记记录的atexit,如果你强迫你的服务器停止使用Ctrl-C将不会被调用.

为此,还有另一个模块 - signal.

https://docs.python.org/2/library/signal.html