1. Node.js talking to PROGRESS
PUG Challenge Americas 2013
Tuesday, 18 September 2018
Node.js talking to PROGRESS

2. Node.js talking to PROGRESS
Introduction
Node.js
PROGRESS connections
Tuesday, 18 September 2018
Node.js talking to PROGRESS

3. Node.js talking to PROGRESS
Introduction
Robert Prediger
14 years experience in web development
19 years experience in PROGRESS
Tuesday, 18 September 2018
Node.js talking to PROGRESS

4. Node.js talking to PROGRESS
Web
Backend
Progress
Client
Javascript
Middleware
Progress
Javascript
Tuesday, 18 September 2018
Node.js talking to PROGRESS

5. Node.js talking to PROGRESS
Javascript is everywhere:
Browsers
Webservers
Databases
Mobile Devices
Adobe, Google, Apple and Microsoft are spending a huge amount of money!
JavaScript seems to be the worlds most used programming language.
Tuesday, 18 September 2018
Node.js talking to PROGRESS

6. Node.js talking to PROGRESS
Few facts about Javascript:
1995 Developed by Brendan Eich
The Best of Lisp
The Worst C / Java syntax (Sun wanted this crap)
The prototypical inheritance from Self
In 12 days
1999 Microsoft invented XMLHTTP
2008 Release of Google Chrome and V8
2009 Ryan Dahl invented Node.js
Tuesday, 18 September 2018
Node.js talking to PROGRESS

7. Node.js talking to PROGRESS
Typescript
interface Person { firstname: string; lastname: string; } class Student { fullname : string; constructor( person : Person ) { this.fullname = person.firstname + " " + person.lastname; var user = new Student( { firstname: "Jane", lastname: "User" } );
Tuesday, 18 September 2018
Node.js talking to PROGRESS

8. Node.js talking to PROGRESS
What is Node.js
Server side Javascript
Built on Chrome V8 Engine
Event-driven, non blocking I/O model
What is it for?
Easily building fast, scalable network applications
Perfect for data-intensive real-time application that run across distributed devices
Tuesday, 18 September 2018
Node.js talking to PROGRESS

9. Blocking I/O Node.js database, filesystem – disk
S3, external APIs – networking
Tuesday, 18 September 2018
Node.js talking to PROGRESS

10. Node.js talking to PROGRESS
Tuesday, 18 September 2018
Node.js talking to PROGRESS

11. Node.js talking to PROGRESS
F-18 Hornet
Max speed of 1,190 mph
RAM
Banana slug
Max speed of mph
Hard disk
Tuesday, 18 September 2018
Node.js talking to PROGRESS

12. Node.js talking to PROGRESS
Typical Request
F = Fast F-18 Hornet
S = Slow Banana Slug
FSSSSSSSSSSSSSF
Tuesday, 18 September 2018
Node.js talking to PROGRESS

13. Node.js talking to PROGRESS
Webserver
Messenger
WebSpeed
Agent
Request
Thread
CGI
Tuesday, 18 September 2018
Node.js talking to PROGRESS

14. Node.js talking to PROGRESS
DEFINE QUERY qCust FOR Customer.
OPEN QUERY qCust FOR EACH Customer.
GET FIRST qCust.
<next statement>
Tuesday, 18 September 2018
Node.js talking to PROGRESS

15. Node.js talking to PROGRESS
Request with WebSpeed:
Finished request
Start 2nd request
Green is executing thread
Red is waiting on I/O
Tuesday, 18 September 2018
Node.js talking to PROGRESS

16. Web Apps Node.js blocking I/O decreases concurrency
Tuesday, 18 September 2018
Node.js talking to PROGRESS

17. Node.js talking to PROGRESS
Tuesday, 18 September 2018
Node.js talking to PROGRESS

18. Node.js talking to PROGRESS
Non Blocking I/O Model
Tuesday, 18 September 2018
Node.js talking to PROGRESS

19. Node.js talking to PROGRESS
Reactor Pattern
Browser
Click
Callbacks
Drag
Callbacks
Tuesday, 18 September 2018
Node.js talking to PROGRESS

20. Node.js talking to PROGRESS
Event-Driven
Tuesday, 18 September 2018
Node.js talking to PROGRESS

21. Node.js talking to PROGRESS
Evented Programming
$(″body″).click( function() {
$(this).css( ″color″, ″red″ );
});
Event Callback
Tuesday, 18 September 2018
Node.js talking to PROGRESS

22. Node.js talking to PROGRESS
Request with Node:
Reactor
Request
Request
Green is executing thread
Red is waiting on I/O
Tuesday, 18 September 2018
Node.js talking to PROGRESS

23. Node.js talking to PROGRESS
Can handle thousands of concurrent connections with minimal overhead (CPU/Memory) on a single Process!
Tuesday, 18 September 2018
Node.js talking to PROGRESS

24. Node.js talking to PROGRESS
Tuesday, 18 September 2018
Node.js talking to PROGRESS

25. Node.js talking to PROGRESS
Summary
Extremely efficient networking applications
Fast javascript runtime (V8)
Rapid growth in both, packages and community
Tuesday, 18 September 2018
Node.js talking to PROGRESS

26. Socket.io Introduction
Tuesday, 18 September 2018
Node.js talking to PROGRESS

27. Protocol for having a bidirectional communication with client.
Socket.io
Protocol for having a bidirectional communication with client.
Tuesday, 18 September 2018
Node.js talking to PROGRESS

28. Node.js talking to PROGRESS
Socket.io
Example server.js:
var io  = require('socket.io').listen( 80 );
io.sockets.on('connection', function (socket) {
     socket.emit( 'message', { text: 'Hello World' });
    socket.on('chat', function (data) {          socket.broadcast.emit(data);      });
});
Tuesday, 18 September 2018
Node.js talking to PROGRESS

29. Node.js talking to PROGRESS
Socket.io
Example client.js:
    <script src="/socket.io/socket.io.js"></script>     <script>         var socket = io.connect('
        socket.on( 'message', function (data) {
            console.log(data);
        });         socket.emit( 'chat', { message: 'Hi' } );     </script>
Tuesday, 18 September 2018
Node.js talking to PROGRESS

30. Node.js talking to PROGRESS
Demo
Tuesday, 18 September 2018
Node.js talking to PROGRESS

31. Communication between Progress and Node.js
Tuesday, 18 September 2018
Node.js talking to PROGRESS

32. Node.js talking to PROGRESS
TCP
Tuesday, 18 September 2018
Node.js talking to PROGRESS

33. Node.js talking to PROGRESS
HTTP
Tuesday, 18 September 2018
Node.js talking to PROGRESS

34. Node.js talking to PROGRESS
Webservice
Tuesday, 18 September 2018
Node.js talking to PROGRESS

35. Node.js talking to PROGRESS
var soap = require('soap'), url = ' args = { blz: ' ' }; soap.createClient( url, function( err, client ) { client.getBank( args, function(err, result) { console.log( err, result ); });
Tuesday, 18 September 2018
Node.js talking to PROGRESS

36. node4progress Direct connect via Progress
Tuesday, 18 September 2018
Node.js talking to PROGRESS

37. Messaging Progress AMQP (Advanced Messaging Queuing Protocol)
AMQP is the Internet Protocol for Business Messaging
Tuesday, 18 September 2018
Node.js talking to PROGRESS

38. Node.js talking to PROGRESS
REST
Tuesday, 18 September 2018
Node.js talking to PROGRESS

39. Node.js talking to PROGRESS
var rest = require('rest');
rest.post( '
{ data: 334 })
.on('complete', function(data, response) {
if (response.statusCode == 201) {
... }
});
Tuesday, 18 September 2018
Node.js talking to PROGRESS

40. Node.js talking to PROGRESS
Questions?
Tuesday, 18 September 2018
Node.js talking to PROGRESS