Channels ▼
RSS

Design

Generative and Transformational Techniques in Software Engineering


Reflections and Aspects

Shigeru Chiba (Tokyo Institute of Technology) focused his tutorial on mainstream transformation usages such with the use of reflection and aspects.

Reflection can be seen as dynamic transformation allowing the application to change its behavior during runtime by intercepting calls and potentially augmenting the data structures. He has written several reflective systems including and more recently openC++, openJava, and Javassist (part of the JBOSS project). He conceded that reflection was hard to use and explained how Aspect-Oriented Programming (AOP) is a safer way to change behaviors. AOP let an advice be introduced around a point cut. The advice can include code to be called before and after and new storage needs. The point cut identifies the parts of the code that will be affected by the advice. Shigeru then came back to the difficulties of using reflection and proposed the use of dynamic aspects to resolve these where new aspects can be brought in during execution. This is particularly interesting for systems that can have no downtime. He mentioned the current effort by many to separate the definition of the advice from the point cut, a concept that he has built into GluonJ, his latest system. Finally, he dismissed criticisms on the limited scope of AOP by pointing out that he preferred to push a working solution forwards than to refine a non-working one!


Related Reading


More Insights






Currently we allow the following HTML tags in comments:

Single tags

These tags can be used alone and don't need an ending tag.

<br> Defines a single line break

<hr> Defines a horizontal line

Matching tags

These require an ending tag - e.g. <i>italic text</i>

<a> Defines an anchor

<b> Defines bold text

<big> Defines big text

<blockquote> Defines a long quotation

<caption> Defines a table caption

<cite> Defines a citation

<code> Defines computer code text

<em> Defines emphasized text

<fieldset> Defines a border around elements in a form

<h1> This is heading 1

<h2> This is heading 2

<h3> This is heading 3

<h4> This is heading 4

<h5> This is heading 5

<h6> This is heading 6

<i> Defines italic text

<p> Defines a paragraph

<pre> Defines preformatted text

<q> Defines a short quotation

<samp> Defines sample computer code text

<small> Defines small text

<span> Defines a section in a document

<s> Defines strikethrough text

<strike> Defines strikethrough text

<strong> Defines strong text

<sub> Defines subscripted text

<sup> Defines superscripted text

<u> Defines underlined text

Dr. Dobb's encourages readers to engage in spirited, healthy debate, including taking us to task. However, Dr. Dobb's moderates all comments posted to our site, and reserves the right to modify or remove any content that it determines to be derogatory, offensive, inflammatory, vulgar, irrelevant/off-topic, racist or obvious marketing or spam. Dr. Dobb's further reserves the right to disable the profile of any commenter participating in said activities.

 
Disqus Tips To upload an avatar photo, first complete your Disqus profile. | View the list of supported HTML tags you can use to style comments. | Please read our commenting policy.
 

Video