sa_lecture_df-1.pdf

7/30/2019 SA_lecture_DF-1.pdf

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Kazimieras Mickus, VU MIF

Layered Application Guidelines

Software Architecture

The project „Increasing Internationality in Study Programs of the Department of Computer Science II“,project number VP1–2.2–ŠMM-07-K-02-070,funded by The European Social Fund Agency and the Government of Lithuania



Outline

Software Architecture and Design

Design Fundamentals

Application Archetypes

Kazimieras Mickus, VU MIF2



Detailed outline 1/3

Software Architecture and Design What Is Software Architecture?

Key Principles of Software Architecture Architectural Patterns and Styles

A Technique for Architecture and Design





Design Fundamentals Layered Application Guidelines

Presentation Layer Guidelines Business Layer Guidelines

Data Layer Guidelines

Service Layer Guidelines

Quality Attributes

Crosscutting Concerns Communication and Messaging

Physical Tiers and Deployment





Application Archetypes Choosing an Application Type




Detailed outline





Quality Attributes






More detailed outline Layered Application Guidelines

Overview

Logical Layered Design

Presentation, Business, and Data Layers Services and Layers

Services Layer

Design Steps for a Layered Structure

Step 1 – Choose Your Layering Strategy Step 2 – Determine the Layers You Require

Step 3 – Decide How to Distribute Layers and Components

Step 4 – Determine If You Need to Collapse Layers

Step 5 – Determine Rules for Interaction Between Layers Step 6 – Identify Cross Cutting Concerns

Step 7 – Define the Interfaces between Layers

Step 8 – Choose Your Deployment Strategy

Step 9 – Choose Communication ProtocolsKazimieras Mickus, VU MIF

7




Presentation layer.

Business layer.

Data layer.




Services and Layers




Design Steps for a Layered Structure

Step 1 – Choose Your Layering Strategy

Step 2 – Determine the Layers You Require

Step 3 – Decide How to Distribute Layers andComponents

Step 4 – Determine If You Need to Collapse Layers

Step 5 – Determine Rules for Interaction BetweenLayers

Step 6 – Identify Cross Cutting Concerns


Step 8 – Choose Your Deployment Strategy

Step 9 – Choose Communication ProtocolsKazimieras Mickus, VU MIF

11



Step 5 – Determine Rules for Interaction Between Layers

Top-down interaction.

Strict interaction.

Loose interaction.





Abstract interface.

Common design type.

Dependency inversion. Message-based.




Detailed outline





Quality Attributes




sa_lecture_df-1.pdf

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