Holy Grid

Moritz Klein

Rotterdam, 25-MAR-2019

enabling the adaptive enterprise

Key Facts

Independent Technology Housewith Cross-Industry Expertise

HeadquarterRatingen

230 employees

Founded1994

Top Company for Trainees & Students

Privately-OwnedCorporation

Oracle Platinum Partner

Microsoft Gold Partner33 Mio. Euro

Revenue in 2018

Germany‘s number 1 in APEX

BranchesFrankfurt & Cologne

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About me

Moritz Klein

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

▪ The Interactive Grid

▪ Architecture

▪ Interactive Grid vs. Interactive Report

▪ Configuration Object

▪ Model vs. View

▪ Utilise the Model

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Agenda

▪ 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

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The Interactive Grid

▪ Rather complex architecture

▪ Many different modules

▪ Elegantly orchestrated

▪ Uses Models (apex.model)

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Architecture

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

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Interactive Grid vs. Interactive Report

▪ Holds all configuration settings

▪ Use “JavaScript Initialization Code“ to modify▪ Function taking one argument with config data

▪ Modify as needed

▪ Return modified config data

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Configuration Object

Model

▪ 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

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Model vs. View

▪ 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

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Phases I typically go through and did many times while preparing for this

Working with the Model

▪ Subscribe to Notifications

▪ Observer Pattern

▪ Build Custom Validations

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Utilize the Model

Some techniques shown now could get you into trouble with your DBA

▪ Yes, it’s sometimes hard

▪ Yes, avoid doing such things if possible

▪ But if you need, then use the model.

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Conclusion

enabling the adaptive enterprise

@commi235

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