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from time import sleep | |
import tornado | |
from multiprocessing.pool import ThreadPool | |
_workers = ThreadPool(10) | |
class BackgroundMix(tornado.web.RequestHandler): | |
"""将block任务放入线程池中执行 | |
EXAMPLE: | |
# blocking task like querying to MySQL | |
def blocking_task(n): | |
sleep(n) | |
return n | |
class Handler(RequestHandler, BackgroundMix): | |
@asynchronous | |
def get(self): | |
self.run_background(blocking_task, self.on_complete, (10,)) | |
def on_complete(self, res): | |
self.write("Test {0}<br/>".format(res)) | |
self.finish() | |
""" | |
def run_background(self, func, callback, args=(), kwds={}): | |
self.ioloop = tornado.ioloop.IOLoop.instance() | |
def _callback(result): | |
self.ioloop.add_callback(lambda: callback(result)) | |
_workers.apply_async(func, args, kwds, _callback) |
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