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116 lines (96 loc) · 3.18 KB
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# -*- coding: utf-8 -*-
"""
Created on 2016-12-23 11:24
---------
@summary: request 管理
---------
@author: Boris
@email: boris_liu@foxmail.com
"""
import threading
import time
from queue import Queue, Empty
import feapder.setting as setting
import feapder.utils.tools as tools
from feapder.db.redisdb import RedisDB
from feapder.network.request import Request
from feapder.utils.log import log
class Collector(threading.Thread):
def __init__(self, redis_key):
"""
@summary:
---------
@param redis_key:
---------
@result:
"""
super(Collector, self).__init__()
self._db = RedisDB()
self._thread_stop = False
self._todo_requests = Queue(maxsize=setting.COLLECTOR_TASK_COUNT)
self._tab_requests = setting.TAB_REQUESTS.format(redis_key=redis_key)
self._is_collector_task = False
def run(self):
self._thread_stop = False
while not self._thread_stop:
try:
self.__input_data()
except Exception as e:
log.exception(e)
time.sleep(0.1)
self._is_collector_task = False
def stop(self):
self._thread_stop = True
self._started.clear()
def __input_data(self):
if setting.COLLECTOR_TASK_COUNT / setting.SPIDER_THREAD_COUNT > 1 and (
self._todo_requests.qsize() > setting.SPIDER_THREAD_COUNT
or self._todo_requests.qsize() >= self._todo_requests.maxsize
):
time.sleep(0.1)
return
current_timestamp = tools.get_current_timestamp()
# 取任务，只取当前时间戳以内的任务，同时将任务分数修改为 current_timestamp + setting.REQUEST_LOST_TIMEOUT
requests_list = self._db.zrangebyscore_set_score(
self._tab_requests,
priority_min="-inf",
priority_max=current_timestamp,
score=current_timestamp + setting.REQUEST_LOST_TIMEOUT,
count=setting.COLLECTOR_TASK_COUNT,
)
if requests_list:
self._is_collector_task = True
# 存request
self.__put_requests(requests_list)
else:
time.sleep(0.1)
def __put_requests(self, requests_list):
for request in requests_list:
try:
request_dict = {
"request_obj": Request.from_dict(eval(request)),
"request_redis": request,
}
except Exception as e:
log.exception(
"""
error %s
request %s
"""
% (e, request)
)
request_dict = None
if request_dict:
self._todo_requests.put(request_dict)
def get_request(self):
try:
request = self._todo_requests.get(timeout=1)
return request
except Empty as e:
return None
def get_requests_count(self):
return (
self._todo_requests.qsize() or self._db.zget_count(self._tab_requests) or 0
)
def is_collector_task(self):
return self._is_collector_task