Software Engineering S17 Software Reuse

Front 1

COTS

Back 1

commercial off-the-shelf
(e.g. COTS system)

Front 2

5 Benefits of Reuse

Back 2

1) Increased dependability
2) Reduced process risk
----less uncertainty in development costs
3) Effective use of specialists
4) Standards compliance
5) Accelerated Development

Front 3

Design Patterns (defn)

Back 3

A design pattern is a way of reusing abstract knowledge about a problem and its solution

Patterns often rely on object characteristics such as inheritance and polymorphism.

Front 4

Generator-based reuse

Back 4

* Program generators involve the reuse of standard patterns and algorithms.

* These are embedded in the generator and parameterised by user commands. A program is then automatically generated.

* Generator-based reuse is possible when domain abstractions and their mapping to executable code can be identified.

Front 5

Aspect-Oriented Software Development is based on the principle of __________ ___ ________

Back 5

Based on the principle of separation of concerns.

Shared components are woven into an application at different places when the program is compiled.

Cross-cutting concerns are implemented as aspects and are dynamically woven into a program. The concern code is reused and the new system is generated by the aspect weaver.

Front 6

(Application) Framework (defn)

Back 6

A framework is a reusable, partially complete application that can be specialized to produce custom applications.

Ex) Microsoft .NET
Ex) Model View Control (MVC) Framework

Front 7

System infrastructure frameworks

Back 7

Support the development of system infrastructures such as communications, user interfaces and compilers.

Front 8

Middleware integration frameworks

Back 8

Standards and classes that support component
communication and information exchange.

Front 9

Enterprise application frameworks

Back 9

Support the development of specific types of application such as telecommunications or financial systems.

Front 10

Application System Reuse

Back 10

Involves the reuse of entire application systems either by configuring a system for an environment or by integrating two or more systems to create a new application.

Front 11

2 approaches to Application System Reuse

Back 11

1) COTS product integration
2) Software Product Lines

Front 12

1) COTS Product Reuse

Back 12

COTS systems are usually complete application systems that offer an API (Application Programming Interface).

Building large systems by integrating COTS systems is now a viable development strategy for some types of system such as E-commerce systems.

Front 13

2) Software Product Lines

Back 13

Software product lines or application families are applications with generic functionality that can be adapted and configured for use in a specific context.

 Adaptation may involve:
 Component and system configuration
 Adding new components to the system
 Selecting from a library of existing components
 Modifying components to meet new requirements

Front 14

4 Types of Software Product Lines (Specialization)

Back 14

1) Platform specialization
2) Environment sp.
---diff versions for diff operating environments, e.g., diff. communication equipment
3) Functional sp.
---for diff customers w/ diff requirements
4) [Business] Process sp.
---diff versions for diff business processes