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@@ -4,7 +4,7 @@
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(defstruct feed-item guid link title description published)
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(defparameter *rss-min-period* 60 "Min rss refresh period in seconds")
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-(defparameter *rss-max-period* 600 "Min rss refresh period in seconds")
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+(defparameter *rss-max-period* 1800 "Max rss refresh period in seconds")
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(defparameter *rss-change-rate* 0.1 "Refresh period adjustment rata")
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(defun http-default (url)
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@@ -39,14 +39,14 @@
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(dex:get url :force-binary t) :external-format :utf-8))))
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(make-feed :url url :title (child-text root "title"))))
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-(defun adjust-period (feed had-new?)
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+(defun adjust-period (feed coeff)
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"Adjust the period of feed based on whenever there were new items. With clamping"
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(let* ((p (feed-period feed))
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(diff (round (* p *rss-change-rate*))))
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(setf (feed-period feed)
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(min *rss-max-period*
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(max *rss-min-period*
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- (if had-new? (- p diff) (+ p diff)))))))
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+ (- p (* coeff diff)))))))
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(defun need-fetch-p (feed)
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(or (null (feed-next-fetch feed))
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@@ -58,7 +58,7 @@
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unless (member (feed-item-guid item) (feed-seen-guids feed) :test #'equal)
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do (pushnew (feed-item-guid item) (feed-seen-guids feed) :test #'equal)
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and collect item)))
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- (adjust-period feed (consp items))
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+ (adjust-period feed (if (consp items) (length items) -1))
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(setf (feed-next-fetch feed)
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(local-time:timestamp+ (local-time:now)
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(feed-period feed)
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