Services

There are several runscripts in the /srv/ directory of the repository. This page aims to document what they do.

Queue Processors

vote_link_q and vote_comment_q

Voting on a link or comment inserts an item on one of these queues. The queue processors read the votes and process them to detect cheating then update the scores accordingly.

scraper_q

When a link is submitted, it is added to the scraper_q for deferred processing. This queue processor works through the submitted links and will scrape the submitted URL for media embed information and thumbnails.

commentstree_q

After a comment is created, this queue processor does the work of updating the comment tree data structures.

comments_q

This processor inserts items onto the /comments listing. It exists because the lock contention of prepending to the list from every app was too high.