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Copy pathcollector.py
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130 lines (107 loc) · 3.63 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.core.runtime_state import RuntimeState
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._state = RuntimeState()
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
self._state = RuntimeState()
while not self._state.is_stop_requested:
try:
with self._state.busy():
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._state.request_stop()
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 pending_count(self):
return self.get_requests_count()
def is_idle(self):
return not self.is_collector_task() and self.pending_count() == 0
def is_stopped(self):
return self._state.is_stop_requested
def is_collector_task(self):
return self._is_collector_task