April 2020
Intermediate to advanced
292 pages
6h 50m
English
Content preview from Practical Microservices
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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.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.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.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.
Joining the “I Wrote a Microservice” Club
Seven chapters into this book, and this is the moment you’ve been waiting for—your first Component! Here’s to hoping you aren’t underwhelmed.
We have two things to do with this Component. We need it to subscribe to where its commands will be, and we need it to handle those commands. Let’s start with the top-level function this Component defines:
| 1: | function build ({ messageStore }) { |
| - | const identityCommandHandlers = |
| - | createIdentityCommandHandlers({ messageStore }) |
| - | const identityCommandSubscription = messageStore.createSubscription({ |
| 5: | streamName: 'identity:command', |
| - | handlers: identityCommandHandlers, |
| - | subscriberId: 'components:identity:command' ... |
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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.