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Editorial
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a letter to the editor
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COLUMNS |
Guest Column
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Using Active Objects for Structuring
Service Oriented Architectures. Anthropomorphic Programming with
Actors
By Dave Thomas and Brian Barry |
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| Service Oriented Architectures (SOAs), which
were previously beneficial in legacy OLTP and Telecom systems, are once
again popular, this time for use with web services. SOAs offer language
and technology independence, including the important ability to not require
every useful program to be in the latest language and/or on the latest
platform. SOAs use self described wire formats such as SOAP, which make
it easy to communicate between different technologies. |
Classification Theory
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The Theory
of Classification, Part 13: Template Classes and Genericity
By Anthony J.H. Simons |
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| In this article, Simons explores the consequences
of adding generic classes to the Theory of Classification. After looking
at some historical notions of polymorphism and type parameters, he examines
how to incorporate these into the type-level of the theory, and then
looks at how introducing or instantiating type parameters can be combined
with the process of deriving subclasses by inheritance. |
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Cyber Databases
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| On Supporting Structure-Agnostic
Queries for XML
By Won Kim, Wol Young Lee and Hwan Seung Yong
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This navigational access to XML documents
is a natural consequence of the hierarchical structure of XML. However,
it is also desirable to allow the users to formulate structure-agnostic
queries against XML documents, to complement the current navigation-based
queries.
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UML
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UML 2 Activity and Action
Models, Part 5: Partitions
By Conrad Bock
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| This column describes partitions, which are
a way of grouping actions that have some characteristic in common. In
particular, they can relate actions to classes that are responsible for
them, and highlight the abstraction that activities provide for interaction
diagrams and state machines. |
Java at Large
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The Imperion Threading System
By Douglas Lyon
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The Imperion threading system is a more
reliable threading system than the normal java.lang.Thread. Imperion
removes dangerous methods and guards’ inputs in order to avoid
exceptions.
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Strategic Software Engineering
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Domain *
By John D. McGregor |
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Taking a domain-based approach provides a
context for software development that creates synergy with other business
activities of the company producing strategically significant results.
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REFEREED ARTICLES |
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UML Associations: A Structural and Contextual View
By Gonzalo Génova, Juan Llorens and José M. Fuentes
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The different kinds of communication links
that can exist in an interaction among objects pose the question of
whether every link is or is not an instance of an association, and
whether an association must exist whenever there is a communication
path between objects. The distinction between static and dynamic associations
is not adequate to solve this problem, since in object-orientation
every association has static and dynamic features, so that these two
aspects do not serve to define two disjoint subtypes of association.
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| Extending the Java Language with
Dynamic Classification
By Liwu Li
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A dynamic classification feature of an
object-oriented programming language allows an object to change its
class membership without changing its identity at runtime. The new
membership of the object can be signified with a role, which is taken
on by the object and which can be implemented as an object of the target
class.
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| Online Upgrade of Object-Oriented Middleware
By Apostolos Zarras
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A system that relies on object-oriented
middleware comprises computational objects that are specific to the
system’s purpose and middleware objects used for the transparent
integration of the former. The efficient maintenance of such a system
involves the dynamic upgrade of the aforementioned entities. So far,
there have been various approaches dealing with the online upgrade
of computational objects. This paper examines the second part of the
problem: the online upgrade of middleware.
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OUTLOOK |
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A brief outlook to the next issue
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PDF
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