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Confidential
Identify Design Mechanisms: Steps
Categorize clients of analysis mechanisms
Categorize clients of analysis mechanisms
Document architectural mechanisms
Document architectural mechanisms
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Proprietary and
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Identify Design Mechanisms: Steps
Categorize clients of analysis mechanisms
Categorize clients of analysis mechanisms
Document architectural mechanisms
Document architectural mechanisms
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Identify Design Mechanisms: Steps
Pattern
Pattern
A common solution to a common problem in a context
Analysis/Design Pattern
Analysis/Design Pattern
A solution to a narrowly-scope technical problem
A fragment of a solution, or a piece of the puzzle
Framework
Framework
Defines the general approach to solving the problem
Skeletal solution, whose details may be analysis/design patterns
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What Is A Design Pattern
A design pattern provides a scheme for refining the subsystems
A design pattern provides a scheme for refining the subsystems
or components of a software system, or the relationships
or components of a software system, or the relationships
between them. It describes a commonly-recurring structure
between them. It describes a commonly-recurring structure
of communicating components that solves a general design
of communicating components that solves a general design
problem with a particular context.
problem with a particular context.
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Erich Gamma, Richard Helm, Ralph Johnson and John
Erich Gamma, Richard Helm, Ralph Johnson and John
Vlissides 1994.“Design Patterns – Elements of Reusable Object-Oriented
Vlissides 1994.“Design Patterns – Elements of Reusable Object-Oriented
Software”
Software”
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Review: Why Use Analysis Mechanisms?
Oh no! I found a group of classes that has
persistent data. How am I supposes to
design these things if I don’t even know
what database we are going to be using?
That is why we have a persistence analysis
mechanism. We don’t know enough yet,
so we can bookmark it and come back to it
later
Analysis mechanisms are used during analysis to reduce the complexity of
analysis, and to improve its consistency by providing designers with a
short-hand representation for complex behavior.
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Categorize Analysis Mechanisms
Purpose
Purpose
To refine the information gathered on the analysis mechanisms
Steps
Steps
Identify the clients of each analysis mechanism
Identify characteristic profiles for each analysis mechanism
Group clients according to their use of characteristic profiles
Proceed bottom-up and make an inventory of the implementation mechanisms that you
have at your disposal
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Identify Design Mechanisms: Steps
Categorize clients of analysis mechanisms
Categorize clients of analysis mechanisms
Documentation architectural mechanisms
Documentation architectural mechanisms
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Design and Implementation Mechanisms
Analysis Design Implementation
Remote Method
Invocation (RMI)
Persistency
Analysis
Mechanism
(Conceptual)
Design
Mechanism
(Concrete)
Implementation
Mechanism
(Actual)
OODBMS
RDBMS JDBC
ObjectStore
Java 1.2 from Sun
Legacy Data
New Data
Distribution
Persistency
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Architectural Mechanisms can be treated as patterns (i.e.,
Architectural Mechanisms can be treated as patterns (i.e.,
stereotyped parameterized collaboration)
stereotyped parameterized collaboration)
Review: Documenting Architectural Mechanisms
Structural Aspect
Behavioral Aspect
Pattern Name
Template
Parameters
Documented in Design Guidelines
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Review: Course Registration Analysis Mechanisms
Persistence
Persistence
Distribution
Distribution
Security
Security
Legacy Interface
Legacy Interface
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