def _verify_workers_limits(self, url, avg_links_per_page=10):
active_domains = Domain.get_active_domains(self.db)
return LimiterModel.has_limit_to_work(self.db, active_domains, url, avg_links_per_page)
def get_next_job(cls, db, expiration, cache, lock_expiration, avg_links_per_page=10):
from holmes.models import Settings, Worker, Domain, Limiter # Avoid circular dependency
page = None
lock = None
settings = Settings.instance(db)
workers = db.query(Worker).all()
number_of_workers = len(workers)
active_domains = Domain.get_active_domains(db)
active_domains_ids = [item.id for item in active_domains]
all_domains_pages_in_need_of_review = {}
for domain_id in active_domains_ids:
pages = db \
.query(
Page.uuid,
Page.url,
Page.score,
Page.last_review_date
) \
.filter(Page.domain_id == domain_id) \
.order_by(Page.score.desc())[:number_of_workers]
if pages:
all_domains_pages_in_need_of_review[domain_id] = pages
pages_in_need_of_review = []
current_domain = 0
while all_domains_pages_in_need_of_review:
domains = all_domains_pages_in_need_of_review.keys()
if current_domain >= len(domains):
current_domain = 0
domain_id = domains[current_domain]
item = all_domains_pages_in_need_of_review[domain_id].pop(0)
pages_in_need_of_review.append(item)
if not all_domains_pages_in_need_of_review[domain_id]:
del all_domains_pages_in_need_of_review[domain_id]
current_domain += 1
if not pages_in_need_of_review:
return None
if settings.lambda_score > 0 and settings.lambda_score > pages_in_need_of_review[0].score:
cls.update_pages_score_by(settings, settings.lambda_score, db)
for i in range(len(pages_in_need_of_review)):
if not Limiter.has_limit_to_work(db, active_domains, pages_in_need_of_review[i].url, avg_links_per_page):
continue
lock = cache.has_next_job_lock(
pages_in_need_of_review[i].url,
lock_expiration
)
if lock is not None:
page = pages_in_need_of_review[i]
break
if page is None:
return None
return {
'page': str(page.uuid),
'url': page.url,
'score': page.score,
'lock': lock
}