September 2018
Intermediate to advanced
398 pages
9h 43m
English
Content preview from Scala Programming Projects
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Consumer group
You can have multiple consumers for the same topic in a consumer group. If you have the same number of consumers and partitions in a group, each consumer will read only one partition. This allows parallelizing the consumption. If you have more consumers than partitions, the first consumer takes the partition and the rest of the consumers are in waiting mode. They will consume only if a consumer reading on a partition is failing.
Until now, we only have one group of consumers reading from partitions. In a typical system, you would have many consumer groups. For example, in the case of a Bitcoin transaction, we could have a consumer group reading the messages to perform analytics on it, and another group for a user interface ...
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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.