tornado thread 任务处理模式

import functoolsimport timeimport threadingimport loggingimport Queue#import hunspellimport tornado.webimport tornado.websocketimport tornado.localeimport tornado.ioloopfrom tornado.options import define, optionsdefine('debug', type=bool, default=False, help='run in debug mode with autoreload (default: false)')class Handler(tornado.web.RequestHandler):    @property    def queue(self):        return self.application.queue    @tornado.web.asynchronous    def get(self, word):        self.queue.put( (word, self.on_callback) )    def on_callback(self, output):        self.write("Thread output: %s" % output)        self.finish()class ThreadWord(threading.Thread):    def __init__(self, queue):        threading.Thread.__init__(self)        self.queue = queue        #self.hobj = hunspell.HunSpell('./fr-classique.dic', './fr-classique.aff')    def run(self):        while True:            try:                word, callback = self.queue.get(True, 1)            except Queue.Empty:                continue            # cpu intensive work ...            #output = self.hobj.spell(word)            output = word            tornado.ioloop.IOLoop.instance().add_callback(functools.partial(callback, output))            self.queue.task_done()class Application(tornado.web.Application):    def __init__(self):        handlers = [            (r"/(.*)", Handler),        ]        settings = {            'cookie_secret': 'W/wT5ndaR/2sa3m8OOQ5q0xDvnZclE4BtimO1f+QM2Y=',            'debug':options.debug,        }        tornado.web.Application.__init__(self, handlers, **settings)        self.queue = Queue.Queue()        for i in range(5):            t = ThreadWord(self.queue)            t.setDaemon(True)            t.start()if __name__ == "__main__":    #tornado.options.parse_command_line()    application = Application()    application.listen(8888)    tornado.ioloop.IOLoop.instance().start()