# -*- coding: utf-8 -*-
from flask import Flask, jsonify
from time import sleep
from concurrent.futures import ThreadPoolExecutor

# 创建线程池执行器
executor = ThreadPoolExecutor(2)
app = Flask(__name__)

# 耗时任务是否完成（推荐redis存储 唯一标识）
gl = True


@app.route(‘/‘)
def run_jobs():
    # 判断是否需要执行耗时任务
    global gl
    if gl:
        print "submit"
        executor.submit(long_task, ‘hello‘, 123)
    else:
        gl = True
        return ‘long task complete.‘
    return ‘long task running.‘


# 耗时任务
def long_task(arg1, arg2):
    print "args: %s %s!" % (arg1, arg2)
    sleep(20)
    print "Task is done!"
    global gl
    gl = False


if __name__ == ‘__main__‘:
    app.run(debug=True, host=‘0.0.0.0‘, port=5000)