Component Software Beyond Object-Oriented Programming

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Component Software Beyond Object-Oriented
Programming

• Clements Szyperski
• Chapter 27 New Professions

Alexandre Alvaro aa2_at_cin.ufpe.br Universidade
Federal de Pernambuco (UFPE)
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Agenda

• Overview
• New Professions

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Overview

• Component Technology
• Organizational Structure
• Define stakeholders

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New Professions

• Component system architect
• The most important and most demanding

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New Professions

• Component framework architect
• Independent creation
• Evolution of components
• Compatibility
• Preservation of interoperability roles

Specify very precisely what the framework expects
from and provides to a component
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New Professions

• Component developer
• Greatest replaceability
• Cross-organizational exchange
• Well-define and bounded functionality
• Component bounds is what a single person can
  manage

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New Professions

• Component assembler

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Component Software Beyond Object-Oriented
Programming

• Clements Szyperski
• Chapter 28 A component marketing paradox

Alexandre Alvaro aa2_at_cin.ufpe.br Universidade
Federal de Pernambuco (UFPE)
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Agenda

• Overview
• Paradox
• Branding
• Pay per use
• Co-placement of advertisements
• Leveraging on newly created markets
• Leverage of integrative forces

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Overview

• Hardware x software
• Customer seem to get something for their money
• Internet
• Store to virtual stores
• If customers do not want to pay for software
  components they download from the internet, how
  should the investment in producing the components
  be amortized ?

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Branding

• Control quality and prices...
• Example banana
• Branding is associated with
• Quality
• Performance
• Success examples
• IBMs WebSphere
• Microsofts .NET

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Pay per use

• Brad Cox, 1990
• Every use of component must be tracked and billed
• But this approach is flawed
• Service could be collapsed
• Transparency of cost is essential
• Example browsing through web pages
• Pay-per-use is inadequate
• The concept of late composition

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Pay per use

• Advantage
• Small component shops can exist
• Billing transparency
• Brad Cox, 1996
• Transitive payment contracts between components
• Steel, 1996
• How the software they have acquired (Customer) is
  actually used ?
• Comparison
• Competition

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Co-placement of advertisements

• TV.
• Early 2000
• A major source of income on the web
• The web can be subject-oriented
• Depends on the user profile
• Privacy
• Example Linux OS
• Link to information search and retrieval

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Leveraging on newly created markets

• The first will be the major favored

Companies highly specialized domain expertise
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Leveraging on newly created markets
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Leveraging on newly created markets

• Biggest success stories
• Contextual composition frameworks for
  transactional applications (MTS, EJB, COM, J2EE
  and CLR)

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Leverage of integrative forces
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Leverage of integrative forces
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