Jason E. Shao

Interesting – in jUnit 4.4 – combining @Ignore and @AfterClass (haven’t tried the other static’s like @BeforeClass) don’t seem to do what I’d expect – e.g. the @AfterClass annotated method seems to execute regardless.

For the last few months, have moved most of my work programming from the Mac to Ubuntu (first convenience via VMs, recently because I switched jobs and at the new employer it was that or Windows) which has mostly gone will, though there were some issues around Eclipse UI gotchas, notably:

• Sometimes buttons wouldn’t let you click them (though keyboard focus mostly worked find)
• Sometimes windows wouldn’t paint properly – contents, toolbars, etc.

At first I thought it might have been Virtualbox’s mouse driver, but it looks like it’s a generic Eclipse/GTK issue, with some notes at http://blogs.gurulabs.com/dax/2009/10/what-gdk-native.html on the root cause, and how to fix it. For the time being I’ve created scripts to launch Eclipse (and STS) and before I fire off Eclipse, do a:

This seems to resolve the painting issues, though it feels a bit less smooth/fast (UBUNTU+GNOME+COMPIZ) – still usable, though admittedly have tried this on a pretty fast machine (recent 2xQuad-Core w/lots of RAM)

Tags: Eclipse, java, ubuntu

Recently at work, had a need to rerun some load-testing numbers, but got stick since our internal servers all had builds we were looking at, or weren’t setup, or yada, yada… so we turned to EC2, with overall pretty positive results.

Some background – we build a web-based portal application that runs on a lightweight J2EE stack (Tomcat, Spring, Liferay) and do most of our testing w/jMeter. So, the process of setting up to loadteest on Amazon looked like:

• Build AMIs using Centos + our Applications (this took a bunch of hours, coming up to speed with Amazon’s tools for images – mostly the usual self-signed cert woes) — this was much easier since we have a one-click build for probably 80% of our full-machine footprint (that last 20% is a doozy though)
• Add a local LDAP server (OpenDS) to the image – was faster than troubleshooting some odd connectivity issues to our usual infrastructure
• Fire up some Amazon instances
• Grab one of the existing public AMIs w/Linux + Jmeter (Ubuntu in this case)
• Upload our scripts and start running

Net cost: ~ $40

Thoughts on the experience:

• Running jMeter inside EC2 is probably one of the things that makes this economically viable. Since our loadruns generate GBs, and GBs of traffic per minute in peak scenarious, paying per GB bandwidth can rapidly get expensive — but we were able to keep all the traffic in-cluster
• The fact that AMIs don’t by default have persistent storage (though EBS or new AWS features get around this – for more $$$) is actually a plus. We can run a test, shut down the image, bring it back up, and we have a clean image again to run to re-verify
• We were looking for stress/soak/smoke testing – so general benchmarks. For this need, we were not yet at the stage of verifying performance in a particular hardware or other environment, we just needed rough approximate numbers
• We chose not to use Amazon’s loadbalancing infrastructure, but might in the future
• EC2 actually let us run all our test scenarios (we have 3-4 main ones) in parallel, on spun-up instances – this cut our time to completion from something like 24-48 hours if we ran them serially to closer to 5hrs after setup was done – a big savings, especially for multiple runs)

All in all, it was positive experience, with some next steps we’re looking to incorporate:

1. Automate building AMIs – we did this by hand, and it was far and away the most time-expensive part (8 hours) and when we got errors early on we were immediately suspicious of configuration errors
2. Incorporate this into our Continuous Integration system (Hudson) – if construction of AMIs was automated (and Amazon’s tooling looks easy to automate) we could schedule this to run automatically, on a nightly/weekly basis – which would be nice, since right now this is a pretty heavily manual process – also, paying by the hour, the overall cost is a lot less than trying to manage with dedicated systems (and coordinate scheduling for the same)

Tags: cloud, ec2, jmeter, loadtesting

Compiling Java 1.6 projects using Maven on Mac OS X

This makes much sense (took a few minutes though) had my JVM defaulted to JDK 5 from Eclipse 3.4 which wouldn’t run on the 64-bit Java 6 VM – easy fix though – personally I prefer changing the symlinks in /System/Library/Frameworks/JavaVM.Framework/ to point to the JDK version myself…

Tags: java, mac, maven, version

Got another batch of Google Wave invites – drop me a line if you need them.

Tags: accounts, google, wave

Get them while they’re hot – 2 Google Voice invites left…

Update: This batch all gone – will let people know if I get another group.

RT @mkorcuska: Congrats to @mfeldstein67 @drchuck, @_ieb_, and Maggie Lynch on election to Sakai Board

Congratulations to all, and sounds like the future is well in hand…

Crucible 2.1 also supports the new pre-commit review creation functionality recently added to the Atlassian IDE Connector for Eclipse. This plugin from Tasktop, the makers of Mylyn, is a must have for Eclipse users who use Crucible (or Bamboo, or JIRA, or FishEye).

http://blogs.atlassian.com/devtools/2009/11/crucible21released.htmlлегла

This looks pretty nice – pre-commit workflow is a nice addition – makes it so much easier to do code reviews and enforce “don’t break the build” in the same group…

Got another batch of Google Wave invites – drop me a line if you need them.

Update: This batch all gone – will let people know if I get another group.

I was using mvn:release (release:prepare, release:perform) to release a number of modules today (for several hours – so much for speeding up through automation) but kept getting errors to the effect of:

[INFO] Error deploying artifact: Authentication failed: Cannot connect. Reason: Auth fail