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1 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
2 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Real World ADF Design & Architecture Principles
ADF...
3 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Learning Objectives
•  At the end of this module yo...
4 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Program Agenda
•  Characteristics and Benefits of T...
5 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
ADF Task Flow - Key Benefits
•  Partitions and modu...
6 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
ADF Task Flow - Key Benefits
•  On-board security
–...
7 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Secret of Oracle ADF Rockstar Programmers
"Develop ...
8 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Program Agenda
•  Characteristics and Benefits of T...
9 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Analogy
Service Orientation
“When building distribu...
10 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Service Oriented Development
•  SOA uses the conce...
11 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.11 Copyright © 2012, Oracle and/or its affiliates. ...
12 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Task Flow Oriented Architecture (TOA)
•  Think tas...
13 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.13 Copyright © 2012, Oracle and/or its affiliates. ...
14 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Program Agenda
•  Characteristics and Benefits of ...
15 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Java Server Faces and MVC
Responsibility of the Co...
16 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
ADF with ADF Controller and MVC
Responsibility of ...
17 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Bounded Task Flow
•  XML defined in View Controlle...
18 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Bounded Task Flow Diagram
19 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Bounded Task Flow Properties
20 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Properties
Property Description
Default Activity A...
21 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Properties
Property Description
Return Value Defin...
22 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Task Flow Communication
•  Input Parameter
•  Retu...
23 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Exception Handling
•  Exceptions can be mapped to ...
24 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
About ADF Regions
•  Display task flows in indepen...
25 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Use it Inside Another View
26 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
How-to create an ADF Region
•  Drag bounded task f...
27 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Conclusion
•  Think task flow oriented architectur...
28 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Further Reading
•  http://www.oracle.com/technetwo...
29 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
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Oracle ADF Architecture TV - Design - Task Flow Overview

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Slides from Oracle's ADF Architecture TV series covering the Design phase of ADF projects, providing an overview on task flows.

Like to know more? Check out:

- Subscribe to the YouTube channel - http://bit.ly/adftvsub
- Design Playlist - http://www.youtube.com/playlist?list=PLJz3HAsCPVaSemIjFk4lfokNynzp5Euet
- Read the episode index on the ADF Architecture Square - http://bit.ly/adfarchsquare

Veröffentlicht in: Technologie, Bildung
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Oracle ADF Architecture TV - Design - Task Flow Overview

  1. 1. 1 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
  2. 2. 2 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Real World ADF Design & Architecture Principles ADF Task Flow Overview ORACLE PRODUCT LOGO 15th Feb 2013 v1.0
  3. 3. 3 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Learning Objectives •  At the end of this module you should be able to: –  Understand the difference between page oriented and task flow oriented development –  Explain the benefits ADF task flows provide –  Understand bounded task flow metadata files and properties Image: imagerymajestic/ FreeDigitalPhotos.net
  4. 4. 4 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Program Agenda •  Characteristics and Benefits of Task Flows •  Service Oriented Development •  Task Flow Design Fundamentals
  5. 5. 5 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. ADF Task Flow - Key Benefits •  Partitions and modularizes large business applications •  Visual task flow diagrams –  Provide a shared language between developers and domain experts •  Reusable application flows published via ADF Libraries •  Can have isolated transactions •  Can be used as "remote services with a UI" •  Supports traditional web navigation model and rich internet navigation models •  Support for nested control flows
  6. 6. 6 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. ADF Task Flow - Key Benefits •  On-board security –  ADF Security –  Bounded task flow browser access protection •  Additional memory scopes –  Avoid memory attribute name conflicts –  Avoid memory bloating •  Improved and declarative exception handling •  Load on demand •  Static and dynamic configuration
  7. 7. 7 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Secret of Oracle ADF Rockstar Programmers "Develop User Interface Services – Not Pages" Steven Davelaar, "Building Highly Reusable Task Flows" http://www.slideshare.net/stevendavelaar/reusable-taskflows
  8. 8. 8 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Program Agenda •  Characteristics and Benefits of Task Flows •  Service Oriented Development •  Task Flow Design Fundamentals
  9. 9. 9 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Analogy Service Orientation “When building distributed solution logic, design approaches revolve around a software engineering theory known as the separation of concerns. In a nutshell, this theory states that a larger problem is more effectively solved when decomposed into a set of smaller problems or concerns." Thomas Erl, "SOA: Principles of Service Design"
  10. 10. 10 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Service Oriented Development •  SOA uses the concept of services –  Predominately about services and information flow –  Fine grained services are consumed by larger composite •  Service Oriented Development –  Web based analogy to SOA –  Suits ADF development –  About web tasks/processes and how they’re chained –  Fine grained task flows are consumed by larger apps –  Aligns with the UX concepts of task driven design
  11. 11. 11 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.11 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Hands up, are task flows services? Exercise Image: imagerymajestic/ FreeDigitalPhotos.net
  12. 12. 12 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Task Flow Oriented Architecture (TOA) •  Think task flow from design time on –  Create a task flow portfolio plan • Inventory of existing task flows • Requirement for new task flows •  Ensure objectives and requirements reflect task flow benefits –  Reuse, loose-coupling •  Use parent task flows to orchestrate child flows •  Identify patterns and standardize on them
  13. 13. 13 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.13 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Image: imagerymajestic/ FreeDigitalPhotos.net •  Knowing about SOA and service principles is a valuable starting point for developing Task Flow best practices •  Task Flows prepare applications for change •  Task Flows implement business use cases or parts of •  Task Flows separate process flows from business logic •  There is no fixed sizing recommendation: Sky is the limit and common sense a good judge
  14. 14. 14 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Program Agenda •  Characteristics and Benefits of Task Flows •  Service Oriented Development •  Task Flow Design Fundamentals
  15. 15. 15 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Java Server Faces and MVC Responsibility of the Controller request response View Model Controller Faces Servlet faces-config.xml component events Component Model Converter, Validator, Renderer JSF document Business Objects (Managed Beans) Phase Events Component event Listener and action handlers
  16. 16. 16 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. ADF with ADF Controller and MVC Responsibility of the Controller request response View Model Controller Faces Servlet adfc-config.xml component events ADF Binding Converter, Validator, Renderer JSF document Data Control (Business Service) Phase Events Component event Listener and action handlers
  17. 17. 17 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Bounded Task Flow •  XML defined in View Controller project •  Located in WEB-INF directory or (better) sub-folder(s) therein •  XML –  Defines task flow behavior like transaction management and Data Control sharing –  Defines activities •  Activities reference views, methods, operations, task flows, switcher statements –  Defines managed beans used in task flow –  May reference task flow template
  18. 18. 18 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Bounded Task Flow Diagram
  19. 19. 19 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Bounded Task Flow Properties
  20. 20. 20 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Properties Property Description Default Activity Activity that is invoked first when a bounded task flow is called. Exception Handler Activity that is called by the framework in case of an exception Initializer Invokes managed bean method upon task flow initialization before any activity is executed. Finalizer Invokes managed bean method upon task flow exit using return activity. URL Invoke Bounded task flows using JSPX documents may be called directly from a browser URL. This property defines which task flow is browser accessible and which task flow can only be accessed from within an ADF application. Managed Beans Managed bean definitions for use within the bounded task flow. Input Parameter Definitions API contract between the bounded task flow and the calling task flow or view. Commonly Used in Bounded Task Flows
  21. 21. 21 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Properties Property Description Return Value Definitions API contract between bounded task flow calling task flow. Requires task flows called via task flow call activity Train Defines whether or not the bounded task flow exposes a train model for navigation Critical If save point feature is used, critical ensures a save point is taken when the task flow is left for the application to recover to this state Transaction Defines the transaction setting for the bounded task flow and whether the data control is shared or not (isolated). Also defines if an implicit save point is taken when navigating into a bounded task flow that does not run in its own transaction Commonly Used in Bounded Task Flows
  22. 22. 22 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Task Flow Communication •  Input Parameter •  Return values
  23. 23. 23 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Exception Handling •  Exceptions can be mapped to an activity •  Called when exceptions are thrown –  Not a “normal” part of a flow <exception-handler>unexpectedErrorPage</exception-handler>
  24. 24. 24 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. About ADF Regions •  Display task flows in independent areas of a page or a page fragment •  Executes a task flow without requiring the parent view to refresh •  Key enabler of enterprise Web 2.0 development with the Oracle Fusion development platform •  Allows building desktop like web user interfaces that unveil the real power of Ajax •  Basis of UI Shell layout pattern
  25. 25. 25 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Use it Inside Another View
  26. 26. 26 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. How-to create an ADF Region •  Drag bounded task flow to visual page editor –  Task flow must use page fragments
  27. 27. 27 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Conclusion •  Think task flow oriented architecture when building ADF applications •  Bounded task flow and region is the most common pattern used when designing ADF applications •  Bounded task flows can be deployed and reused as ADF libraries
  28. 28. 28 Copyright © 2012, Oracle and/or its affiliates. All rights reserved. Further Reading •  http://www.oracle.com/technetwork/developer-tools/jdev/ documentation/index.html –  Oracle JDeveloper and ADF Documentation Library –  Fusion Developer Guide •  Part III Creating ADF Task Flows –  Getting Started with ADF Task Flows –  Working with Task Flow Activities –  Using Parameters in Task Flows •  Task Flow Design Fundamentals –  http://www.oracle.com/technetwork/developer-tools/jdev/adf-task-flow- design-132904.pdf
  29. 29. 29 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.

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