Sometimes, JBoss reports that it is unable to bind to a port, saying it is already in use. However, this is not always the case.
Tag Archive: gotchas
Nov 11
YUI Datasources
Been a while since I’ve written. I’ve been sick and working on a side project. That said, I’ll be writing more…… Today’s note/reminder is a gotcha about YUI datasources. If you have JSON feeding the datasource and you’re getting back more fields in the results than you’re expecting, the datasource will not behave properly. For …
Sep 25
JBoss run.sh may be harmful
A coworker and I discovered an issue with jboss’ run.sh (which starts the app server). The problem lies in different flavours of unix (or unix-like) shells returning different values for wait. The relevant code is:
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# Wait until the background process exits WAIT_STATUS=0 while [ "$WAIT_STATUS" -ne 127 ]; do JBOSS_STATUS=$WAIT_STATUS wait $JBOSS_PID 2>/dev/null WAIT_STATUS=$? done |
This is all well and good in linux — redhat uses /bin/bash and ubuntu uses /bin/dash for /bin/sh — …
Sep 12
Class is Class, and Instance, Instance, and never the twain shall meet
More about methods, it’s inspired/spurred by a comment on methods, public_methods, and private_methods by Pit Captain. It also corrects some misconceptions I had (and may have (wrongly) given others). I’ve added a new category, “eating crow” for this and any other postings where I step back and re-evaluate my posts. This is to keep me …
Aug 29
CSS tooltips using CSS Sprites
For a project I’m currently working on I wanted to make some “bubble” tooltips. In order to cut down on the size/number of images, I’m using css sprites. A quick google reveals that nobody else has (at least on the first page) put together tooltips using sprites. The technique will work with any sort of …
Aug 28
CSS “width” gotcha
I found out something interesting today. Per the W3C, the total “width” that a block element uses is: If ‘left’ or ‘right’ are given as ‘auto’, their computed value is 0. The following constraints must hold between the other properties: ‘margin-left’ + ‘border-left-width’ + ‘padding-left’ + ‘width’ + ‘padding-right’ + ‘border-right-width’ + ‘margin-right’ = width …
Aug 26
Why my code is broken….. (break my code redux)
Yesterday, I posted an article entitled Break my code, please, wherein I posted a very fragile piece of code, with the challenge to find ways in which to break it. What follows is a discussion of the code and why it is bad/fragile/easily broken…..
Aug 19
rspec, restful_authentication, and login_required
This is partly for myself, and partly for anyone after me….. I have a controller generated via rspec_scaffold — yes, I know, it might not be what all the cool kids are doing, but it works. I also have restful_authentication set up to use rspec. So, when I go to add before_filter :login_required, autotest frowns …
Aug 19
autotest reminder (or why did it go boom?)
autotest / zentest are really useful tools. However, it’s important to remember to run migrations for the test database — otherwise your tests will fail (miserably!) I’ve found the following to be helpful for using autotest: Getting started with Autotest – Continuous Testing Autotest RSpec Notifications for Ubuntu « My Pragmatig life
Aug 13
The trouble with injection
Ruby’s injection is very useful, but if you don’t remember one key fact, you’ll shoot yourself in the foot.
