Aaron Johnson Now with 50% less caffeine!

instantFeeds: real time notification of RSS updates via Openfire

I wrote a long winded post a couple months ago with a nebulous title called “IM and RSS: Rome is on Fire” where I talked about the feed bot that I wrote for Wildfire (which is now called Openfire). It’s been up and running now for a couple months, giving me a chance to work [...]

ROME and wfw namespace elements

I created a ROME parser and generator for wfw:comment and wfw:commentRss elements today. You can read all about it here and download the source code here.
Not sure what the wfw:comment or wfw:commentRss elements are for? Imagine you’re reading my blog in desktop aggregator and you want to post a comment to my blog. [...]

OGNL: getter and setter types must match

Yesterday I ran into a interesting bug with the WebWork application I spend my waking hours working on, at least initially I thought it was a WebWork bug. I had a WebWork action with a getter / setter combination that looked like this:

public void setUser(String username) {
…
}
public User getUser() {
…
}

The thinking here was that if [...]

ROME, custom modules, publishdate and RSS

At work, I’ve taken on the work of migrating our RSS feeds currently being produced using JSP to ROME. Since we’ve added a few custom elements to the feeds available in Jive Forums (things like message and thread counts), I’m taking advantage of the feature in ROME that gives you the ability to programtically define [...]

JDJ: Mailets and Matchers

Remember back a couple months ago when I posted an article about using Apache James to implement VERP? Well, it actually did end up getting published in JDJ. If you subscribe to the magazine, you should have it in your hot little hands right now or you can visit the archives. If not, you’ll have [...]

JSON: Making Content Syndication easier

At work we’ve been having some discussions about sharing content between two websites: the natural first option was an XML solution, in this case RSS. Site A would subscribe to the RSS feeds of the site B, periodically retrieving the updated feeds, caching the contents of each feed for a specified period of [...]

WebWork and meaningful URLs

Personal pet peeve: meaningful URLs (which tonight I found out go by many names: pretty URLs, RESTian URLs, SES URLs, hackable URLs, etc…). At work, we use WebWork extensively but up until this point we haven’t made an effort to create meaningful URL’s. As with any well designed framework, it turns out that [...]

Wildfire Enterprise launches..

For the last couple weeks I’ve been working on the ‘Deep, Real-time Reporting’ features of Wildfire Enterprise, which officially launched today (if you’ve ever thought about messing around with instant messaging / XMPP / Jabber, I’d highly recommend checking it out and that’s the last corporate pitch you’ll hear out of me). Herewith (as [...]

Using Apache James and JavaMail to implement Variable Envelope Return Paths

I submitted a skeleton of the article that follows to JDJ, was told they would like to ‘commission’ it and then finally submitted it only to never hear anything back from them. So instead you get to read it here. Enjoy!
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Anyone who has spent any time working a application that sends emails has [...]

Nutch, Yahoo!, and Hadoop

It’s been awhile since I mentioned anything about Lucene, my favorite Java based open source indexing and search library (which I built the karakoram spider / search application around). Doug Cutting, who created Lucene and who has spent the last couple years working on Nutch, was recently hired by Yahoo!. I just have a couple [...]