January 2018
Intermediate to advanced
336 pages
7h 56m
English
Content preview from Microservices with Clojure
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Using the CQRS pattern
The Command Query Responsibility Segregation (CQRS) pattern applies the command-query separation (https://en.wikipedia.org/wiki/Command-query_separation) principle by splitting the application into two parts, query side and command side. Query side is responsible for getting the data by only querying the state of the application, whereas command side is responsible for changing the state of the system by performing create, update, or delete operations on application data that may result in updation of one or more databases used by the application. Although the CQRS pattern is often used in conjunction with the event-sourcing pattern, it need not be tied to events and can be applied to any application with or without ...
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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.