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David Walend

David Walend started learning Java with the alpha 3 release in 1994 after a kind computer science professor at Tufts University overheard his tantrum on distributed simulations, memory management, multithreaded code and meteorologists of questionable parentage. His active open source projects include JDigraph, SomnifugiJMS, and SalutafugiJMS. David is working on high-performance parallel and distributed computing at MathWorks.

 

Articles

j1-2k8-mtW07: JMX for Unit Tests in Test-Driven Development
Using the Java Management Extensions -- JMX -- to observe internal state provides an elegant alternative to reflection and compiler hacks. As a byproduct it provides a JMX interface for the completed system. This talk will cover how to benefit from unit testing with JMX, and the code and overhead...
Understanding Service Oriented Architecture
Do you feel like software vendors and conference speakers have stretched the meaning of "service oriented architecture" to the point where anything is an SOA? Do you even know what the term should mean any more? In this re-introductory article, David Walend offers an overview of what true SOAs...

Weblogs

Event Based Programming in JavaFX

Old Song, New World

I decided to try my hand at some JavaFX programming to see what the language had to offer. Two of the key features of JavaFX are its ability to bind to data,...

Good-bye, Alpha

I released SomnifugiJMS v22 a few weeks back. Not alpha-0-22. This subtlety is a big change in approach for a small change in code. I make fewer...

JMX and Test-Driven Development

At JavaOne this year I did a short talk on using JMX in test-driven development.

How big is that boolean[]?

My day job is software architect for a bunch of algorithm scientists who "feel the need for speed." We work to keep the system safe from...

SalutafugiJMS -- Java Messaging Service on ZeroConf

SalutafugiJMS is a peer-to-peer implementation of the Java Messaging Service specification that...

Preparing for JavaOne

JavaOne is an amazing conference. About 15,000 of us get together to exchange ideas, hear about new things, meet internet friends face-to-...

Wild Winds Wrestling with the Restless Sea

I finally found some time to get back to the generics saga. A comment in the...

Me and You In User Interfaces

The pronouns we use when we address computers and imagine them addressing us hides some profound insight. I haven't pinned down exactly what. Wikipedia has a nice grammar description on...

Bad Things In adamTaglet

adamTaglet -- Architecture Driven Assisted Modeling Taglet -- is a taglet that generates class diagrams from a custom JavaDoc tag. The tag holds a...

Whooshing Sounds

Back in May I blogged about simplifying my generics code with dot accessors to the type parameters, to...

What Giants? - Vote For My Generics RFE

Back in May I blogged about simplifying my generics code with dot accessors to the type parameters, to...

Our Grass is Greenest: OGNL and LINQ

About a month ago there was a flurry...

Brilliant Approach to Optional Data Design? Wicked Hack? Source of Horrible Suffering?

I've finally added message selector support for Topics in SomnifugiJMS, a single-process implementation of a Java Messaging Service. It's...

No Giant or Windmill, Just a Deranged Muppet

I gave a talk on the trouble I'm having using complex generics code at the java.net community pavilion at JavaOne. It was a...

Tilting at the Generics Windmill

I've got a quixotic streak that needs exercise every so often. It's time. I'm doing a talk on usability problems in...

Affine Frustration Transformed - New! Fewer Bugs!

I put together a generic ZoomPane that holds other Swing components. Hand ZomePane's transformChanged() method a new AffineTransform to show a new portion of the underlying view....

Connecting to a Command Line Process
Connecting to a Command Line Process AdamTaglet alpha-0-1 is out! It's really rough; .gifs and .jpegs use the default font, instructions are sparse,...
GraphViz Class Diagrams

Last week, Kohsuke Kawaguchi suggested that we could use ...

A Trip in the Way-Back Machine
Ever want to go back in time and unmake a coding decision? Was it after a honeymoon period where you found some critical problem in something you'd bet on heavily and publicly? This happened to me...
Better JavaDoc on http://java.net
Last August I posted a blog on setting up a project on http://java.net. I spent a paragraph on how I posted my...
Sharpening the Axe or Shaving the Yaks?
I've got this great new project at work right now. The deadlines are very gentle and the boundaries are very vague. I am to "make the department's job [experimental planning systems research] easier...
Did I Miss Generic Array Creation?
While sweeping up sawdust before the latest release of JDigraph, I used -Xlint to spot remaining places where I have some things to clean up. I have just...
Naming Generic Types
Naming Generic Types

We've had blogs covering DRY and magic Strings in the last week. I'm going to blog about generic type names, specifically using names longer than one letter.

Some of us...

Amazing -Xlint

I've been reorganizing JDigraph to take advantage of generics. I've been able to implement generic versions of Floyd-Warshall and Dijkstra's algorithms -- hopefully using generics means doing this...

Moving JDigraph
I started writing the code that's grown into JDigraph in an algorithms class in 1995. I wanted to share it with some friends in 2000, so I added a BSD license on it in 2000 and hung it on sourceforge...
Test Driving Generics
I'm impressed that people can blog while attending JavaOne. My head's just clearing up from all the new ideas slamming into the old ones. To relax on the way home, I started stitching generics into...
SomnifugiJMS for User Interfaces, Now With Example Code
Somnifugi JMS is a lightweight, single-JVM implementation of the JMS interface. I've used Somnifugi to simplify the threading architecture on a few user interfaces for clients over the years.
Shutdown Hooks
I just handed in my last assignment for my masters degree, completing a ten-year effort. Maybe there is a reason why they put a "Slow Children" sign in front of our house. And JSDK 1.5 is rolling out...
Coupling in Software Architecture
Coupling in software architecture seems to form a spectrum, based on what has to change to make the system do something different. At one end of the spectrum are dissociated ubiquitous services, like...
Reviewing the Java Community Process v. 2.6 (JSR-215)
The Java Community Process's stated goal is to produce "high quality specifications in 'Internet time' using an inclusive consensus building approach...Consensus around the form and content of the...