Forms, ADF and JET a Non-Aggression Pact

Forms, ADF and JETa Non- Aggression Pact

Florin Marcus

Company Profile

Agenda

What customers dislike about ADF?

What customers like about ADF?

What customers like about ADF?

What customers like about ADF?

Monitoring Performance

Forms and ADF

Who integrates Forms and ADF?

Who integrates Forms and ADF?

ADF - Oracle Metadata Services

Java Plugin disconntinued Consequences for Forms-ADF integration

ADF- Forms UI integration

ADF- Forms UI integration

ADF- Forms UI integration

ADF- Forms UI integration

Oracle JET

Why Another Web Framework?

Oracle JET

Javascript Framework

Consumes REST/JSON

Open Source

No tooling support

Traditional System Architecture on Web

User Cache

1. Minimises database round-trips

2. Holds not committed information

Javascript Framework System Architecture

User Cache in browser solutions:

1. HTML5 LocalStorage

2. IndexedDB

JET vs ADFAdvantages of Oracle JET

Public facing websites

Live data (ref#2)

High Availability support (out of the box)

Advantages of Oracle ADF

Full development stack

Versatile

Superior at PL SQL integration

Great for code generation

Tooling support (building your own wizards) - todo DB Validator wizard

Building Your Own JDev wizards

Declarative PL SQL calls ROWTYPE support

Forms, ADF and JET

Business Integration patterns

Business Integration patterns

Database remains the Best Place for business rules

Business Integration patterns

Advantages

● ‘The Standard’ for Webapps● Scales very well● Both JET and ADF supports it.

Disadvantages

● Limitations on reusing Form’s PL SQL code (no ‘post changes’)

Both ADF and JET supports it

Stateless Connections

Business Integration patterns

Same connection is Guaranteed for the duration of user session.

Widely regarded as ‘Unacceptable’ - up until Websockets.

Fits the same transaction lifecycle as Oracle Forms, allows for conversational state with PL SQL.

Supported by ADF only

Stateful Connections

Websockets and database connectionsPessimistic Locking using Websockets

#REF1

Business Integration patterns

Best approach for PL SQL logic reuse in ADF:

Use Stateless Connection on landing pages, menus, dashboards, search screens.

Switch to Stateful Connection when editing data (data input screens) .

Learning ADF

Journey from Forms to ADF

Learning ADF

3 Programming Languages: Java, Javascript, Groovy

4 Major Java EE technologies: Servlets, Java Server Faces, JDBC

ADF is build on top of:

Learning ADF

Learning ADF

Learning the whole ADF Stack may prove a challenge for the most talented Forms Developer.

Initially, separate the team into roles:

A. Business Developers (PL SQL, ADF Business Components)

B. Web Developers (UI)

Conclusions

References

Oracle ADFwww.oracle.com/technetwork/developer-tools/adf/overview/index.html;jsessionid=6R39V8WhqTQ7HMb2vTQTkzbP5XRFgs4RQzyxQ7fqxH9y6p6vKXk4!-460884186

Oracle JETwww.oracle.com/webfolder/technetwork/jet/index.html

ADF Insider Essentialswww.youtube.com/channel/UClAYKxUUFbBb6QAWH_CXY6g

ADF Architecture TVwww.youtube.com/channel/UCRvu_p8-tRgNi_Cd45Ll-fw

References

#ref1 Saving ADF Queriesandrejusb.blogspot.co.uk/2014/05/personalising-adf-query-with-mds-user.html

#ref2: Websocket Notification on Browser Disconnects andrejusb.blogspot.co.uk/2016/01/automatic-adf-logout-on-browser-close.html

#ref3: Stateful/Stateless Connection Switchandrejusb.blogspot.co.uk/2014/06/adf-bc-reserved-mode-for-db-connection.html

#ref4: Oracle JET Live data andrejusb.blogspot.co.uk/2016/02/oracle-jet-and-websocket-integration.html

Oracle ADF Live data andrejusb.blogspot.co.uk/2015/05/adf-and-two-way-websocket-communication.html