Modernizing Legacy Systems

Software Technologies, Engineering Processes, and Business Practices

Robert C. Seacord, Daniel Plakosh, Grace A Lewis

348 pages, parution le 01/02/2003

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Indisponible

Résumé

"The potential impact of this book cannot be overstressed. Software systems that are not continually and adequately evolved and, in particular, legacy systems that have not been so maintained, can threaten an organization's very survival. I recommend the book as a must for people directly involved in such evolution, whether as customers, managers and resource providers, or as implementers."
--M. M. Lehman, Emeritus Professor, Middlesex University

Businesses inevitably face a critical choice in the design and maintenance of their software systems: Dismantle older systems and completely replace them, or incrementally incorporate new technologies into existing systems. Many businesses choose the latter course, seeking to maximize their existing investment while adapting to rapidly evolving technology. Modernizing Legacy Systems is a much-needed guide, showing how to implement a successful modernization strategy and describing specifically a risk-managed, incremental approach--one that encompasses changes in software technologies, engineering processes, and business practices.

Key topics include:

Making a case for modernization
Understanding requirements and constraints
Maintaining performance, data integrity, and security
Designing and deploying the target architecture
Migrating code and data
Estimating costs

For every topic, the book presents current standards and available products that support legacy system modernization. In addition, a large retail-supply-system case study--a COBOL-coded system being replaced with one based on the J2EE architecture--runs through the book to demonstrate a real-world legacy system modernization effort.

Contents

The Legacy Crisis
The Beast
Risk-Managed Modernization
Developing the Business Case
Understanding the Legacy System
Architecture Representation
Languages and Data Management
Transaction Technology
Software Infrastructure
Maintaining Transactional Context
Business Object Integration
Target Architecture
Architecture Transformation
System Preparation
Code and Data Migration
Integrated Plan
Resource Estimation
Recommendations

L'auteur - Robert C. Seacord

Robert C. Seacord is a senior technical staff member at the SEI. He has over 17 years of development experience, including extensive work with Enterprise JavaBeans™, CORBA, and Web technologies. He has previously been a technical staff member at the X Consortium and IBM.

Caractéristiques techniques

	PAPIER
Éditeur(s)	Addison Wesley
Auteur(s)	Robert C. Seacord, Daniel Plakosh, Grace A Lewis
Parution	01/02/2003
Nb. de pages	348
Format	16 x 23.5
Couverture	Broché
Poids	464g
Intérieur	Noir et Blanc
EAN13	9780321118844