Software Architecture

JSP is the PHP of Java

Embrace separation of concerns

Separation of concerns

• Java/Groovy on the server

• JavaScript, HTML, CSS in the browser

• Limit scope of changes

• Maintain optimal testability

Browser/Client

Architecture

View

• Markup/HTML, CSS, minimal JS

• Presentation/display

• No business logic

Browser

Model

• JavaScript

• DAOs to communicate w/ server

• Maintain data used to feed view

Browser

Controller

• JavaScript

• Respond to user input & update model

• Feed model data to view

Browser

Libraries & Frameworks

Browser

AngularJS

Browser

Ember.js

Browser

Polymer

Small and focused

Browser

React

Simple, fast*, elegant, & powerful

Browser

Server

Architecture

API

• Handle requests from client

• Stateless

• Thin

• REST*

• Representation POJOs

Server

DAO

• Communicate w/ DB

• Stateless

• SQL, HQL, etc

• Includes POJO reps of DB/model

Server

Doman Logic

• Between DAO and API

• Injectable services

• Limited state

• Application-specific behaviors

Server

Model (DB)

• Relational

• NoSQL / Key-Value store

Server

Making life easier

Choosing languages, libraries, and frameworks

Server

Java 8

• Lambda calculus

  • functions

• Default methods

• Method references

• Streams

• Improved Date/time

• No more PermGen

Server

Groovy

• Extends Collections

• Intuitive closure support

• Eliminates boilerplate

• Default param values

• Includes the kitchen sink

Server

A window to a new world

• Simpler and more readable code

• "..." unit tests

• "..." E2E tests

• "..." build scripts

Groovy

Spring Boot

Get a server running in seconds

Server

Comprehensive

• IOC/DI

• REST

• Apache

• JPA

• Build integration

Spring Boot

And best of all...

Spring Boot