Getting Started with EWDjs

Name: Getting Started with EWDjs
Rating: 4.7 (18 reviews)

Learn how to install, configure and begin developing applications with EWDjs

Created byRob Tweed

Last updated 7/2015

English

What you'll learn

install all the components needed by EWD.js on a Windows system
understand the technology behind and architecture of EWD.js
develop browser-based applications using EWD.js
develop Web Services using EWD.js

Course content

5 sections • 23 lectures • 3h 11m total length

Introduction1:44
Discover the EWDjs framework and browser runtime, building a simple client–server app with realtime bidirectional communication, node.js, web sockets, JSON messaging, and databases like cache, Globals DB, and GT.M.
Choose your platform1:47

Outline0:41
Initial preparation of your Windows machine4:08
In this lecture, we'll install the Chrome browser and Notepad++ in preparation for EWDjs. Chrome is not essential, but strongly recommended. Other editors than Notepad++ can be used, but it's a useful and free tool for EWDjs application development, at least to get started with.
Installing Node.js on a Windows Machine6:34
In this lecture, we'll install Node.js. You should install whatever is the latest 0.10.x version available when you watch this video - 0.10.38 was the latest version when this screen-cast was recorded.

We'll also quickly test it using the Windows Console which we'll pin to the task-bar to make future use of Node.js easier.
Installing Cache on a Windows System8:30
In this lecture, we'll install the Cache database on our Windows system, and take you on a quick guided tour of the information you'll need in order to configure it for use with EWDjs
Installing GlobalsDB on a Windows System6:07
In this lecture, we'll install the free GlobalsDB database which is a good alternative to Cache since it's both free and, in fact, the core database engine from Cache! It does have limitations: there's no ability to scale it out or even any real built-in system management facilities, but it's an ideal platform if you want to learn EWDjs and build some initial applications.
Installing EWD.js on a Windows System8:43
With everything ready on our Windows system, we can now install EWDjs
Configuring and running EWD.js with GlobalsDB12:13
With everything now installed, EWDjs can be configured for use with GlobalsDB and started. This lecture also shows you how to stop/restart EWDjs, and how to start the ewdMonitor application in a browser in order to confirm that EWDjs is fully operational.
Configuring and Running EWD.js with Cache14:23
With everything now installed, EWDjs can now be configured for use with the Cache database and started. This lecture also shows you how to stop/restart EWDjs and how to start the ewdMonitor application in a browser in order to confirm that EWDjs is fully operational.
Running EWD.js as a Service on Windows12:22
So far we've been running EWDjs in a Command Prompt window which if fine for development and testing environments, but not ideal for production. In this screencast I'll show you how to use the NSSM utility to create an EWDjs service that will run automatically in the background. I'll also show you how to pipe the console logging information to a log file that can be inspected using the browser-based ewdMonitor application.

How does EWD.js Work?11:12
In this lecture, I'll describe, using an animated presentation, the EWDjs architecture and explain how it works.
Developing a Simple EWD.js Application: Part 112:42
In this lecture, we'll start to develop a simple "hello world" EWDjs application
Developing a Simple EWD.js Application: Part 28:29
In this lecture, we'll send a message from the browser to the EWDjs back-end
Developing a Simple EWD.js Application: Part 38:06
In this lecture, we add a back-end module to handle the message sent from the browser
Developing a Simple EWD.js Application: Part 46:06
In this lecture, we modify the browser's UI in response to the incoming message from the EWDjs back-end
Developing a Simple EWD.js Application: Part 57:05
In this lecture, we construct a more complex message and round-trip its contents between browser and back-end
Developing a Simple EWD.js Application: Part 611:29
In this lecture, we save a browser-generated JSON message into the database and retrieve it again as JSON
Introduction to EWD.js Session Storage6:45
In this lecture we review what happened in the previous lecture, introduce EWDjs Session Storage, and examine how it works
Developing a Simple EWD.js Application: Part 711:00
In this lecture, we save the browser-generated JSON message into Session storage and retrieve it again

Requirements

Very little prior knowledge is assumed for this course
The course just assumes that you are already running a recent version of Windows

Description

This is an introductory course on the EWDjs framework.

The course assumes little, if any, prior technical knowledge, but it helps if you're familiar with Windows, Nodejs, HTML, JavaScript and the use of databases.

The course is mainly based around screen-casts that take the student, step-by-step, through the entire process of

installing the components needed for EWDjs
developing a browser-based application
developing a set of Web Services

However it also includes some animated presentations that aim to help the student to understand the technology and architecture of EWDjs

All the source code used in the examples I create in the screencasts is included in the downloadable resources for each lecture.

With just over 3 hours of lectures, the course is designed to be completed in a day if you can dedicate the time to it, but I'd recommend that some of the lectures are watched several times in order to fully understand what's going on.

This course will be of interest to anyone who wants to develop interactive, browser-based applications and Web Services with Nodejs, and particularly if you're interested in using Nodejs with the Cache database technology or the GT.M database. If you're a Mumps developer looking to update your skills and modernise your technology stack, particularly if you're working with the VistA Electronic Healthcare Record (EHR), then this course will be particularly relevant.

Who this course is for:

This course is meant for anyone wishing to learn the basics of EWD.js in order to develop Node.js applications
This course is also a must for anyone wishing to use EWD.js to modernise the VistA Electronic Health Record (EHR)
This is a beginners course and therefore not suitable for anyone already familiar with using EWD.js

Getting Started with EWDjs

What you'll learn

Explore related topics

Course content

Introduction and Overview2 lectures • 4min