Lino Schildenfeld gave a presentation about APEX RESTful services and Stripe. He is an APEX manager for New Zealand and Australia with over 10 years of Oracle development experience. He discussed the differences between SOAP and REST architectures for web services. REST uses HTTP methods like GET and POST and returns data in JSON format, while SOAP uses XML envelopes. He demonstrated how to create RESTful web services in APEX using the apex_web_service API and consuming external REST APIs.

1. Lino Schildenfeld 10 - 11th
November 2016
APEX RESTful Services
and Stripe
www.apexRnD.co.nz
lschilde.blogspot.com
@LinoSchilde
lschilde@apexRnD.co.nz
AUSOUG Connect 2016

2. in short
APEX R&D manager for NZ/AU
10+ years Oracle development experience
APEX blogger, presenter and enthusiast
NZ APEX meetup organizer
www.meetup.com/ORCLAPEX-NZ
Who am I?

3. About Web Services?

4. Intro
 Enable applications to interact over the Web in a platform-neutral
language independent environment
 Typically based on Simple Object Access Protocol (SOAP) or
Representational State Transfer (REST) architectures
 Message formats
 SOAP (Simple Object Access Protorcol)
 REST (Representational State Transfer)
 Returns a status code over HTTP
 http://www.restapitutorial.com/httpstatuscodes.html

5. SOAP
apex.oracle.comapex.world

6. WSDL - Web Service Definition Language

World Wide Web Consortium standard protocol

sending and receiving requests and responses across the Internet

messages sent back and forth between a provider and a user in SOAP
envelopes

Weather Service, Geocoding, Twitter and other social media resources

based on XML

8. RESTful Service
apex.oracle.comapex.world

9. RESTful
Why is it called Representational State Transfer?
The Web is comprised of resources. A resource is any item of interest.
For example, the Boeing Aircraft Corp may define a 747 resource.
Clients may access that resource with this URL:
http://www.boeing.com/commercial/747/
A representation of the resource is returned (e.g., Boeing747.html). The
representation places the client application in a state. The new representation
places the client application into yet another state. Thus, the client application
changes (transfers) state with each resource representation --> Representational
State Transfer!

10. How REST works?

11. Info

It is architectual model for development

It is not a Protocol or W3C Standard

REST := Representational State Transfer year 2000 by Roy Fielding

HTTP in its core

Lightweight alternative for Remote Procedure Call and Web Services

GET, POST, PUT, DELETE, OPTIONS methods

The default language of REST web services is JSON

12. WSDL and RESTFul differences

13. Differences

The RESTful scope is found in the URI

Does not require the overhead of XML and SOAP envelopes

Inputs are typically provided in the URI - GET, POST, PUT, HEAD, and
DELETE.

WSDL Webservice is more flexible but harder to code

RESTful is easier to configure

In APEX you can write your own RESTful Services

You can consume both – WSDL and RESTful

14. Benefits of running ORDS

15. Webservices in APEX

16. Introduced

Version 1.5 (2004)

WSDL based – offers Forms und Forms with Report

Version 4.0 (2010)

apex_web_service API

RESTful Web Service support

Versions 4.2 - 5.0 further enhancement for RESTful with configuration
options in Shared components

17. How to create?

18. Setup

Three requirements for using Web Services:

You need to enable it

Grant connect to apex_restful_service user

ACL Configured

ORDS installation and configuration

19. DEMO time

20. In practice

21. Further info and references

http://www.doag.org/formes/servlet/DocNavi?
action=getFile&did=4601171&key=apex-plugin.com

ODTUG KSOPE 2014-2016 presentations

http://isu.ifmo.ru/docs/apex41/doc.41/e21674/advnc_web_services.htm

http://www.explorer-development.uk.com/making-consuming-rest-web-services-
using-ords-apex/

http://www.xfront.com/REST-Web-Services.html

http://warp11.nl/2011/07/calling-a-rest-webservice-with-plsql/

http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/schema /
50/Creating_RESTful_web_services/Creating_RESTful_web_services.html#overvi
ew

22. www.apexofficeprint.com

23. Q&A
www.apexRnD.co.nz
lschilde.blogspot.com
@LinoSchilde
lschilde@apexRnD.co.nz