Application Development with Java Enterprise Edition (J2EE)

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Application Development with Java Enterprise
Edition (J2EE)

• Mihkel Nõges
• Tartu University IT department
• mihkel.noges_at_ut.ee

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The Context of Development

• Customer Needs
• are turned into
• Customer Solutions

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Customer NeedsA Good Information System should
be

• Functional
• Understandable
• Beautiful
• All in one place
• Fast
• Growing with my needs

• Cheap
• Accessible
• Secure
• Flexible
• Transparent
• Learning from users
• Doing all my work
• ...

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Everything is possible!

• Imagination is the first form of Application

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Why isnt it already so?The Development Problems

• Speed of Development
• Code Manageability
• System Extensibility and Integration
• Security
• Platform Dependency
• Software Quality
• Roundtrip Engineering

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How can we get there?The Development Appliances

• Standards
• Patterns
• Architectures
• Technologies
• Platforms Frameworks
• Tools
• Integrated Development Environments

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Standards - Examples

• TCP/IP (Transmission Control Protocol/Internet
  Protocol)
• SQL (Structured Query Language)
• HTML (Hypertext Markup Language)

• XML (Extensible Markup Language)
• UML (Unified Modeling Language)
• J2EE (Java 2 Platform, Enterprise Edition)
• Web Services

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Standards - Features

• Bring developers together into a Community
• Simplify Development
• Enable Integration and Cooperation of different
  Platforms and Technologies
• Can be open or closed
• Are in a sense the Patterns made official

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Patterns Examples

• Intercepting Filter
• Front Controller
• Session Façade
• Value List Handler
• Data Access Object
• Service Fail over
• Layered Caching
• Pluggable Services

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Patterns - Features

• Accepted solutions to recurring problems in some
  context
• Common language of developers
• Building blocks of Architectures
• Objects of discussion, that can encompass
  boundaries of technologies and fields of
  application

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Architectures - Examples

• Client-Server
• Thin Client
• MVC (Model-View-Controller)
• Distributed Computing
• Every application has its own more specific
  architecture

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Architectures - Features

• Act as the skeleton of the application
• Standardize application building
• Help to understand, improve, extend and integrate
  the application structures

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Technologies - Examples

• Platforms
• PC
• Windows 2000
• UNIX
• Macintosh
• Oracle iAS
• JBoss

• Frameworks
• MS .NET
• MFC (The Microsoft Foundation Classes)
• BC4J (Business Components For Java)
• UIX
• Struts 1.0 1.1
• JADE

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Technologies - Features

• Provide the environment for the applications to
  run and communicate
• Platforms usually implement Standards
• Frameworks usually support Architectures

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Tools - Examples

• Apache Ant (Java-based build tool)
• CVS (Concurrent Versions System)
• Bugzilla (Bug Tracking System)
• ArgoUML (UML Modeling Tool)
• Rational Rose, Clear Case, Unified Process
• Oracle SCM (Software Configuration Manager)

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Tools - Features

• Simplify application development tasks
• Help to adhere to standards, patterns and
  architectures
• Help to manage projects
• Help to work in a team

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Integrated Development Environments - Examples

• Oracle JDeveloper
• Microsoft VisualStudio .NET Rational XDE
• SUN Forte
• IntelliJ IDEA
• Borland JBuilder
• Borland Delphi

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Integrated Development Environments - Features

• Group a set of tools into a compact environment
• Pluggable Extensions
• Support the whole development process
• Visual Development
• Roundtrip Engineering
• Comprehensive Help and Documentation

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Practical ExamplesOracle JDeveloper UIX/BC4J

• Pure Java MVC Framework
• BC4J Model Layer
• Fast and efficient Oracle Database access
• Flexible Business Logic and Validation
• UIX View and Controller Layers
• XML-based declarative User Interface development
• Flexible integration with other technologies
• Built-in support for Internationalization and
  automatic client-specific options

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Practical ExamplesOracle JDeveloper UIX/BC4J

• JDeveloper
• UML support
• Integrated Testing and Debugging
• Coding Aids Context-Sensitive Help
• Automatic deployment

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Practical ExamplesOracle JDeveloper - UML
Modeling
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Practical ExamplesOracle JDeveloper - Wizards
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Practical ExamplesOracle JDeveloper UIX editor
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Practical ExamplesOracle JDeveloper Running
J2EE
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Practical ExamplesOracle JDeveloper Tables
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Practical ExamplesStruts framework
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References

• J2EE Community Site http//www2.theserverside.com/
  
• Oracle Technology Network http//otn.oracle.com
• Struts Homepage http//jakarta.apache.org/struts
• Struts Tutorial http//j2ee.masslight.com/

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Thank You!

• Create Enjoy!
• Questions to mihkel.noges_at_ut.ee