The document discusses a presentation on building no-Java enterprise applications. It covers topics like the JavaScript ecosystem, simplification, NodeJS, MVVM pattern, theming, unit testing with Jasmine, using the Oracle database with oracledb, security management with Passport JS, linting with ESLint, and building with tools like Gulp, Grunt and npm. The presentation aims to help simplify development of non-Java applications and take advantage of the Node ecosystem and standards.

1. Oracle OpenWorld
2018
October 22-25, 2018
Sanfrancisco
Cloud
Shift
Get ready
Stay ahead
No-Java Enterprise Application

2. 2No-Java | Soham Dasgupta | OOW18 | CodeOne © 2018 Capgemini. All rights reserved.
UI Designer & Architect
Programmer
Oracle ACE Associate
Twitter : @iamsoham
Soham Dasgupta
No-Java Enterprise Application

3. 3Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Agenda
• Javascript Ecosystem
• Simplification
• NodeJS
• MVVM
• Theming
• Unit Testing
• Database – oracledb
• Security Management
• Linters
• Build

4. 4Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
• Introduced in 1993
• Standardized by ECMA on 1997
• Introduction of NodeJS 2009
• Huge open-source community
• Since then till 2017 – It grew exponentially
Javascript Eco-system

5. 5Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Lets try to simplify things a bit

6. 6Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Usecase – Lease Car
API for Cars
Backend(PCS/DBCS/JCS)
• Edmunds API – Car data and deals
• Oracle JET – UI for users
• Backend Cloud/On-Premise – Process Integration

7. 7Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
NodeJS
Benefits
• Event Driven
• Non-blocking I/O API
• Community driven
Why Node
• Streamline your code
• Base it on Standards
• Take advantage to millons of Node
Modules

8. 8Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
The model is the domain object
The view the only thing the end user really interacts with.
The viewmodel separates view from the model.
M-V-VM

9. 9Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
• Define POJOs
• Gather UI data in a managable way
• Validation
• Data orchestration
• Business Logic
• DML operations
• Data binding
Service to Object Model
Brand ModelYearStyles
Jaguar Black 2017 XE

10. 10Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Oracle JET Common Object Model

11. 11Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Theme Builder

12. 12Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Unit Testing - Jasmine
• Open source testing framework for
JavaScript.
• Low overhead, no external dependencies.
• It does not require a DOM.

13. 13Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Database - oracledb
Simple NodeJS module Github project maintained by
Oracle

14. 14Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Database - oracledb

15. 15Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Security Management
Passport JS
Passport is authentication middleware for Node.js.
Extremely flexible and modular.
Passport can be unobtrusively dropped in to any Express-based web
application

16. 16Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Security - PassportJS

17. API Layer
ACCS/OMCe
Weblogic/Java Cloud
Oracle JET
App
NodeJS
Authentication
Module
(Passport JS)
Token Verifier
DB/LDAP/Ac
tive
Directory1.Login
3.JWT
Token
2.
Authentication
6. Response(200/401)
4. API calls with JWT Token
JWT contains Payload with user_id and roles/group
which “Token Verifier” extracts after verification
REST APIs
(NodeJS/Express)
Token Verifier
REST APIs
(ADF-BC/J2EE)

18. {
token:
aaa.XXX.ccc,
groups: A,B,C
}
{
user: abc,
pass:
abc123
}
URI: /flight
Method: POST
Header: {
token: aaa.XXX.ccc
}
{
token:
aaa.XXX.ccc
}
API Layer
ACCS/OMCe
Oracle JET
App
Authenticator
(Passport JS)
Node/Express
(Token Verifier)
DB/LDAP/Ac
tive
Directory1.Login
3.JWT
Token
2.
Authentication
7. Response(200/401)
4. API calls with JWT Token
REST APIs
GET /flight
POST /flight
PUT /flight
DEL /flight
/login
/verif
y
{
groups: A,B,C
}
Group based access
control

19. 19Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Linters
Came from C
Code linting is a way to increase code quality.
Linters like ESLint or JSHint can detect potential bugs

20. 20Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Linting - advantages
Detect common programming errors
Flag suspicious and non-portable constructs (likely to be bugs)
Formatting discrepancy
Non-adherence to coding standards and conventions
Pinpointing possible logical errors in your program
Detecting these simple errors before a manual code review also makes
reviewing the code more effective

21. 21Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Build
Concatenate, Minify and Bundle them before sending them to the
browser
Reducing the size of the file
Run automated unit tests
Managing file order/dependencies
Transpiling
Linting, static analysis, and style checking
Live reload

22. 22Presentation Title | Author | Date © 2018 Capgemini. All rights reserved.
Build Tools
 Task Runners
• Gulp
• Grunt
• npm
 Dependency manager
• Browserify

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the property of the Capgemini Group.
Copyright © 2018 Capgemini. All rights reserved.
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