J 2 EE PET STORE NET PET SHOP

J 2 EE PET STORE &. NET PET SHOP Yong-Han Lee & Charles Harsch

Introduction n Project Description

Recapitulation J 2 EE Pet Store &. NET Pet Shop n Business Model n

Purpose of Pet Store & Pet Shop n n Illustrate basic usage of J 2 EE technology and . NET technology Demonstrate current best practices in system design.

Comparison of J 2 EE PS and. NET PS n n J 2 EE: platform-independent, JAVA-centric. NET: Windows-centric and language-neutral Design goals of J 2 EE Pet Store and. NET Pet Shop were the same Almost the same performance

Business Model

Technological Architecture Model

Model of the Sample Applications n Tier Overview n n Tiered Architecture and used Technology MVC Patterns Design Patterns Modular Design (for J 2 EE Pet Store)

Tiered Architecture and used Technology

Pet Shop multi-tier: Purpose of Tiers

Pet Shop: High-Level Logical Architecture

General structure of a J 2 EE multi-tiered application

Technologies used in different tiers and their functionality in J 2 EE Pet Store

Correspondance of Tiers

Presentation Tier

Components in the Presentation Tier Computational Viewpoint – Detail Level 0

Pet Shop Presentation Tier: Computational Viewpoint of Components – Level 1

Files of J 2 EE Pet Store Web Site Web tier

Middle Tier

Components in the Business Logic Tier Computational Viewpoint – Detail Level 0

Pet Shop Business Logic Tier: Computational Viewpoint of Components – IT Level

Different enterprise beans in J 2 EE PS Web Site EJB tier

Implementation of an EJB

EJB in. NET? n n Enterprise Services Business Entity

Data Access Layer

Components in the Data Access Layer Computational Viewpoint – Detail Level 0

Pet Shop Data Access Layer: Computational Viewpoint of Components – IT Level

MVC Pattern

Model-View-Controller Pattern

Model-View-Controller Pattern: « Code behind »

J 2 EE: Model-View-Controller and corresponding Tiers

Design Patterns used in J 2 EE Pet Store n Design Patterns used in. NET Pet Shop n

Design Patterns used in J 2 EE Pet Store

In which tiers the Design Patterns are best implemented

Design Patterns and MVC

. NET Design Patterns: Design Patterns used in. NET Pet Shop

. NET Design Patterns: Design Patterns in Tiers

Model-View-Controller Pattern: Model-Controller separation

Model-View-Controller Pattern: MVC in Controller Pattern

Modular Design of J 2 EE Pet Store Modular development decouples components from one another benefits: • • • ease maintenance simplifies parallel development provides opportunities for incorporating third-party components

J 2 EE Pet Store Modular Design

Implementation of Control Module

Implementation of Catalog Module

Conclusion

Conclusion n n No big differences Performance: n n . NET a bit better, because efficient caching. . NET PS fewer lines of code, but not significant. J 2 EE PS not optimized for performance Architecture: n n n Both are multi-tiered application with same functionality. NET uses additional tier, business entity to track and pass data J 2 EE uses enterprise beans in EJB tier

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