1. enabling the adaptive enterprise
Holy Grid
Moritz Klein
Rotterdam, 25-MAR-2019

2. Key Facts Independent Technology House with Cross-Industry Expertise
Headquarter
Ratingen
Branches
Frankfurt & Cologne
Germany‘s number 1 in APEX
Oracle Platinum Partner
Microsoft Gold Partner
Privately-Owned Corporation
33 Mio. Euro Revenue in 2018
230 employees
Top Company for Trainees & Students
Founded
1994

3. About me Principal Consultant Since November 2015 working for MT AG
Before that 6 years as Data Warehouse Specialist at Ericsson Telekommunikation GmbH
APEX Developer since first public release in 2004 (HTMLDB 1.5)
Oracle Developer since 2001 (SQL, PL/SQL, OWB)
Organiser of Oracle APEX Meetups Frankfurt
Moritz Klein

4. Agenda The Interactive Grid Architecture
Interactive Grid vs. Interactive Report
Configuration Object
Model vs. View
Utilise the Model

5. The Interactive Grid New component since APEX 5.1
Successor to Tabular Forms
Planned Successor to Interactive Report
Modern multi-row editing component
Rather heavy on the JavaScript side
APEX 5.1 was release in March That’s two years ago…

6. Architecture Rather complex architecture Many different modules
Elegantly orchestrated
Uses Models (apex.model)
Do we really need to know the architecture of the Interactive Grid?
It depends, using a car as an analogy, most people only care that it takes them from A to B.
Other, like me want to know how it works and exploit otherwise hidden features.
Blue: UI Widgets
Yellow: Other modules
Black arrows: calling or using
Red arrows: Notifications

7. Interactive Grid vs. Interactive Report
HTML generated on server
Menu also
No editing
Pivot View
One monolithic JavaScript Module
Interactive Grid
HTML generated on client
Server sends JSON
Editing
No Pivot View (yet)
Collection of small modules
APEX 5.1 was release in March That’s two years ago…

8. And now a demo Configuration Object Holds all configuration settings
Use “JavaScript Initialization Code“ to modify
Function taking one argument with config data
Modify as needed
Return modified config data
And now a demo

9. Model vs. View Model View Generic Data Store Store and manage data
No direct connection to view
Observer Pattern for Notifications
Responsibilites
Fetch Data
Save Data back to server
Allowed Operations
View
Representation Layer
User Interaction
Connected to a model
Knows the connected model
Registers for notifications
Don’t store or manage data
APEX 5.1 was release in March That’s two years ago…

10. And start all over again
Working with the Model
Phases I typically go through and did many times while preparing for this
Excitement
Swearing
Take a coffee break
Look at API documentation
More swearing
Investigate the source code
Even more swearing
Being impressed by the elegant architecture
Feeling like having finished the hunt for the Holy Grail
And start all over again

11. Some techniques shown now could get you into trouble with your DBA
Utilize the Model
Subscribe to Notifications
Observer Pattern
Build Custom Validations
Some techniques shown now could get you into trouble with your DBA

12. Conclusion Yes, it’s sometimes hard
Yes, avoid doing such things if possible
But if you need, then use the model.

13. enabling the adaptive enterprise
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