October 2017
Intermediate to advanced
566 pages
14h 31m
English
Content preview from Drupal 8 Module Development
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Lock API
Whenever we process data on a regular basis, especially if it takes a while to complete, we might run into a situation in which parallel requests want to trigger that process again--while the first is still running. Most of the time, this is not a good thing, as it can lead to conflicts and/or data corruption. A good example from Drupal core in which this can happen is the cron. If we start it, the process can end up taking a few good seconds. Remember, it needs to pull together the hook_cron() implementations and run them all. So while that is happening, if we trigger another cron run, it will give us a nice message asking us to chill because the cron is already running. It does this with the help of the Lock API.
The Lock API is ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.