August 2018
Intermediate to advanced
314 pages
8h 9m
English
Content preview from Java EE 8 Design Patterns and Best Practices
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Tiers
A tier is a physical unit, and it is related to hardware and software components. It is the infrastructure in which the layer components are deployed and executed. Examples of tiers are web browsers, application servers, and database servers. A typical n-tier application is defined with the following tiers:
| Tier | Infrastructure |
| Client | Web browsers, a mobile device |
| Presentation | Web server (container), HTTP protocol |
| Business | Application server (such as Java EE server) |
| Data/Integration | Database servers, messaging service, web services |
Let's look at the following diagram:
Here, it is very important to note the difference ...
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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.