def reload_runnable_spider_job_execution():
'''
add periodic job to scheduler
:return:
'''
running_job_ids = set([job.id for job in scheduler.get_jobs()])
app.logger.debug('[running_job_ids] %s' % ','.join(running_job_ids))
available_job_ids = set()
# add new job to schedule
for job_instance in JobInstance.query.filter_by(enabled=0, run_type="periodic").all():
job_id = "spider_job_%s:%s" % (job_instance.id, int(time.mktime(job_instance.date_modified.timetuple())))
available_job_ids.add(job_id)
if job_id not in running_job_ids:
scheduler.add_job(run_spider_job,
args=(job_instance.id,),
trigger='cron',
id=job_id,
minute=job_instance.cron_minutes,
hour=job_instance.cron_hour,
day=job_instance.cron_day_of_month,
day_of_week=job_instance.cron_day_of_week,
month=job_instance.cron_month,
second=0,
max_instances=999,
misfire_grace_time=60 * 60,
coalesce=True)
app.logger.info('[load_spider_job][project:%s][spider_name:%s][job_instance_id:%s][job_id:%s]' % (
job_instance.project_id, job_instance.spider_name, job_instance.id, job_id))
# remove invalid jobs
for invalid_job_id in filter(lambda job_id: job_id.startswith("spider_job_"),
running_job_ids.difference(available_job_ids)):
scheduler.remove_job(invalid_job_id)
app.logger.info('[drop_spider_job][job_id:%s]' % invalid_job_id)
def reload_runnable_spider_job_execution():
"""
add periodic job to scheduler
:return:
"""
running_job_ids = set([job.id for job in scheduler.get_jobs()]) # 从APScheduler中获取当前正在运行的job
app.logger.debug('[当前正在运行的任务id有: ] %s' % ','.join(running_job_ids))
# 可以调度的job_id集合
available_job_ids = set()
# add new job to schedule
# 从数据库里面取出所有可以被调度的任务
for job_instance in JobInstance.query.filter_by(enabled=0, run_type="periodic").all():
# 构造job_id字符串 spider_job_1:180230238
job_id = "spider_job_%s:%s" % (job_instance.id, int(time.mktime(job_instance.date_modified.timetuple())))
# 插入到可以调度的job_id集合里面
available_job_ids.add(job_id)
# 如果job_id不在APScheduler现在调度的job里面, 添加该调度任务
if job_id not in running_job_ids:
scheduler.add_job(run_spider_job,
args=(job_instance.id,),
trigger='cron',
id=job_id,
minute='{}'.format(job_instance.cron_minutes),
hour='{}'.format(job_instance.cron_hour),
day='{}'.format(job_instance.cron_day_of_month),
day_of_week=job_instance.cron_day_of_week,
month='{}'.format(job_instance.cron_month),
second=0,
max_instances=999,
misfire_grace_time=60 * 60,
coalesce=True)
'''
关于scheduler参数的含义
一个job可能由于某些情况错过执行时间, 比如上一点提到的, 或者是线程池或进程池用光了,
或者是当要调度job时, 突然down机了等
这时可以通过设置job的misfire_grace_time选项来指示之后尝试执行的次数
当然如果这不符合你的期望, 你可以合并所有错过时间的job到一个job来执行, 通过设定job的coalesce = True
'''
app.logger.info('[APScheduler调度器中装载了一个爬虫蜘蛛] [是项目名称为: %s 的] [%s 蜘蛛]'
' [这条任务在数据库中的任务id为: %s] [调度器中的job_id为:%s]'
% (job_instance.project_id, job_instance.spider_name, job_instance.id, job_id))
# 删除无效的job_id
for invalid_job_id in filter(lambda job_id: job_id.startswith("spider_job_"),
running_job_ids.difference(available_job_ids)):
scheduler.remove_job(invalid_job_id)
app.logger.info('[从调度器中删除掉了一个调度任务] [任务id为: %s]' % invalid_job_id)
def reload_runnable_spider_job_execution():
'''
add periodic job to scheduler
:return:
'''
running_job_ids = set([job.id for job in scheduler.get_jobs()])
# app.logger.debug('[running_job_ids] %s' % ','.join(running_job_ids))
available_job_ids = set()
# add new job to schedule
for job_instance in JobInstance.query.filter_by(enabled=0, run_type="periodic").all():
job_id = "spider_job_%s:%s" % (job_instance.id, int(time.mktime(job_instance.date_modified.timetuple())))
available_job_ids.add(job_id)
if job_id not in running_job_ids:
try:
scheduler.add_job(run_spider_job,
args=(job_instance.id,),
trigger='cron',
id=job_id,
minute=job_instance.cron_minutes,
hour=job_instance.cron_hour,
day=job_instance.cron_day_of_month,
day_of_week=job_instance.cron_day_of_week,
month=job_instance.cron_month,
second=0,
max_instances=999,
misfire_grace_time=60 * 60,
coalesce=True)
except Exception as e:
app.logger.error(
'[load_spider_job] failed {} {},may be cron expression format error '.format(job_id, str(e)))
app.logger.info('[load_spider_job][project:%s][spider_name:%s][job_instance_id:%s][job_id:%s]' % (
job_instance.project_id, job_instance.spider_name, job_instance.id, job_id))
# remove invalid jobs
for invalid_job_id in filter(lambda job_id: job_id.startswith("spider_job_"),
running_job_ids.difference(available_job_ids)):
scheduler.remove_job(invalid_job_id)
app.logger.info('[drop_spider_job][job_id:%s]' % invalid_job_id)
