Arrogant Programmer

2019-03-21T15:15:00.000-04:00

 -- Starting Minishift VM ..... FAIL E0321 11:29:07.578030

21298 start.go:494] Error starting the VM: Error creating the VM. Error with pre-create check: "Error detecting VBox version: exit status 126". Retrying.  
Error starting the VM: Error creating the VM. Error with pre-create check: "Error detecting VBox version: exit status 126"

I got the above error while firing up Minishift to run through Rafaele Benevides Istio Tutorial for Red Hat Developers, which you can find here: https://github.com/redhat-developer-demos/istio-tutorial

The error is related to an incomplete uninstall of Virtual Box. The solution is simple: download Virtual Box and run the Uninstall Tool.

How to let Arquillian know that JBoss is running on localhost

2018-04-17T11:06:00.002-04:00

Just add the following to the configuration section:

${arquillian.wildfly.host:localhost}

My complete file was:

   <container qualifier="jboss" default="true">
        <!-- By default, Arquillian will use the JBOSS_HOME environment variable to find the JBoss EAP installation.
             If you prefer not to define the JBOSS_HOME environment variable, alternatively you can uncomment the
             following `jbossHome` property and replace EAP_HOME with the path to your JBoss EAP installation. -->
        <configuration>
            <property name="managementAddress">${arquillian.wildfly.host:localhost}</property>
            <property name="jbossHome">/Users/jeremydavis/Workspace/summit/jboss-eap-7.1</property>
        </configuration>
    </container>

Failed to link org/wildfly/swarm/container/runtime/RuntimeServer

2016-02-25T13:56:00.001-05:00

I got the following error running the WildFly Swarm jaxrs-cdi example:

 Exception in thread "main" java.lang.reflect.InvocationTargetException  
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)  
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)  
      at java.lang.reflect.Method.invoke(Method.java:498)  
      at org.wildfly.swarm.bootstrap.Main.invoke(Main.java:86)  
      at org.wildfly.swarm.bootstrap.Main.run(Main.java:50)  
      at org.wildfly.swarm.bootstrap.Main.main(Main.java:45)  
 Caused by: java.lang.NoClassDefFoundError: Failed to link org/wildfly/swarm/container/runtime/RuntimeServer (Module "org.wildfly.swarm.container:runtime" from BootModuleLoader@29ca901e for finders [BootstrapClasspathModuleFinder, BootstrapModuleFinder(org.wildfly.swarm.bootstrap:main), ClasspathModuleFinder, ApplicationModuleFinder(swarm.application:main)]): org/wildfly/swarm/container/Server  
      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)  
      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)  
      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)  
      at java.lang.reflect.Constructor.newInstance(Constructor.java:423)  
      at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:446)  
      at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:274)  
      at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:78)  
      at org.jboss.modules.Module.loadModuleClass(Module.java:605)  
      at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)  
      at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:363)  
      at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:351)  
      at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:93)  
      at org.wildfly.swarm.container.Container.createServer(Container.java:218)  
      at org.wildfly.swarm.container.Container.<init>(Container.java:146)  
      at org.wildfly.swarm.container.Container.<init>(Container.java:124)  
      at org.wildfly.swarm.Swarm.simpleMain(Swarm.java:64)  
      at org.wildfly.swarm.Swarm.main(Swarm.java:57)  
      ... 7 more

The fix was pretty simple: rebuild WildFly Swarm itself. After a quick mvn clean install everything was up and running.

Apache on OSX Yosemite

2015-11-25T12:36:00.005-05:00

I was recently doing some web stuff on my laptop for the first time in a while. I could pull up the "It Works!" page, but nothing else.
This Apple forum post solved it.
Blogged here to help search results :)

#JavaOne2015

2015-10-25T19:58:00.002-04:00

#JavaOne2015

My fifth JavaOne started today. I attended a Java University class. It was interesting to be on the other side of that sort of presentation.

Red Hat is well represented this year. There is a microsite on Red Hat Developer.

Stop by the Red Hat booth in the vendor hall if you are attending. We have presentations all day long, and there is a rumor about trucker hats...

The agenda at our booth this week:

Monday, October 26th

10:15 - 11:00

Standardized Extension-Building in Java EE with CDI and JCA

- Jason Porter

11:45 - 12:30

Taming Microservices Testing with Arquillian Cube

- Aslak Knutsen, Alex Soto & Bartosz Majsak

1:45 - 2:30

Docker for Java EE Developers

- Rafael Benevides & Markus Eisele

3:30 - 4:15

Shenandoah: An Ultralow-Pause-Time Garbage Collector for OpenJDK

- Christine H. Flood

How to open Finder from the Terminal in OSX

2015-06-22T07:31:00.001-04:00

 open .

This came in handy this morning.

How to find a Java class file in your Maven repository (or any other directory full of jar files)

2015-06-19T06:32:00.001-04:00

find . -name "*.jar" | xargs grep -r [CLASS NAME]

In case you are ever wondering why your builds aren't working.

Rails 4 MiniTest error

2014-05-19T14:19:00.000-04:00

I got the following cryptic error on a new project:

~/…/unit.rb:1037:in `block in process_args’: invalid option: —use-color (OptionParser::InvalidOption)

Thanks to this blog for pointing the way.

I did not copy/paste the suggested code though. I just ran :

guard init minitest

Strange Bundler error, noexec.rb:5:in `pwd'

2014-05-19T13:58:00.002-04:00

I got the following after running "bundle install" :

rubygems-bundler-1.4.2/lib/rubygems-bundler/noexec.rb:5:in `pwd': No such file or directory - getcwd (Errno::ENOENT)

Thanks to stackoverflow and this blog I cd'd into the parent directory and then back into my working directory and bundler worked.

DevNation Day One

2014-04-14T22:36:00.001-04:00

I'm in San Francisco for Red Hat's new developer conference, DevNation It was a great foggy San Francisco morning and then a beautiful day for the first day of the conference.

I caught several good presentations. Neal Ford's talk was up first, and he was as insightful as usual. I've seen Neal speak many times. Any talk that begins with the "poetry of Donald Rumsfeld" is going to get my attention. Known unknowns...

Scott Cranton presented Camel recipes from his recent book, Apache Camel Cookbook There is some really useful stuff in the book. I have already ordered it from Amazon.

They middleware keynote was great Burr Sutter led a team through "Bare metal to BPM" deploying Openshift on a bunch of old laptops (using OpenStack) and pushing Tweets through a jBPM process.

Can't wait for day two

Sublime Text key bindings to jump out of parans, quotes and brackets like in Eclipse

2014-03-01T06:44:00.000-05:00

One of the best features of Eclipse is having the "Enter" key move you outside of the parentheses, ticks, or brackets of a method. That shortcut is so ingrained in me after a decade of Eclipse usage that I doubt I will ever be able to forget it.

Sublime Text is a great editor, but it doesn't have that shortcut. I added it to Preferencs -> Key Bindings -> User

{ "keys": ["enter"], "command": "move", "args": {"by": "characters", "forward": true}, "context": 
 [
  { "key": "following_text", "operator": "regex_match", "operand": "[\"')}](.|$)", "match_all": true  } 
 ]
}

DevNexus 2014

2014-02-28T06:43:00.001-05:00

Earlier this week I attended AJUG's DevNexus conference.

I get the impression that JavaScript is hot again. There were many sessions on JavaScript testing, frameworks and especially Node.js. Atlanta is heavy in the web development space so maybe that is just regional, but there was talk of one Fortune 50 company having moved their online backend to Node.js.

I caught several really good presentations (in alphabetical order by speaker's last name):

Aaron Bedra's talk on Web Security was something everyone writing webapps should attend
Ted Neward's introduction to Node.js
Grant Shipley made me want to try out Titanium (I already use OpenShift, the other thing he talked about)
Burr Sutter's presentation on Vert.x was eye opening. I work for Red Hat, but I don't get to spend much time with the community projects
Stephen Thomas' presentation on testing JavaScript
Andrew Trice gave a great overview of PhoneGap

The DevNexus site should be updated with slides and recordings soon.

If you are in the Southeast keep this conference in mind next year. The sessions are high quality and the price is an absolute bargain.

Mac OS X and VIM

2013-12-06T16:42:00.001-05:00

By default Vim on OS X doesn't have any color. I forgot about .vimrc.

This blog post clued me in on how to set it up. Just add the following to your .vimrc file :

set nocompatible
syntax on

How to increase JBoss Developer Studio or Eclipse font size in Mac OSX

2013-11-26T10:21:00.002-05:00

I typically use JBoss Developer Studio since it has all of the JBoss plugins already installed. All of the plugins are available for plain Eclipse, but it's nice to have them already packaged together.

I recently downloaded the Mac version, and the font sizes on a Mac are tiny.

This Mac OSX Hints post contains the instructions for Eclipse.

It is a little different for JBoss Developer Studio :

locate the "JBoss Developer Studio.app" located in <>/studio/JBoss Developer Studio.app
"control" + click on the "JBoss Developer Studio.app" and choose "Show Package Contents"
this will open a folder "Contents"
open Contents/MacOS/jbdevstudio.ini
remove the line, "-Dorg.eclipse.swt.internal.carbon.smallFonts"
restart JBDS

Happy coding!

30 Technologies in 30 Days at whyjava.wordpress.com

2013-10-31T15:35:00.003-04:00

My favorite thing about JUG meetings is getting a reasonable preview of a new technology in an hours time. I travel a lot with work now and don't get to attend AJUG meetings as often as I'd like. I really miss getting that monthly preview.

Shekhar Gulati is taking this concept to a new level on his blog whyjava.wordpress.com

He is kicking the tires on a new technology every day for the next 30 days and blogging his impressions. So far he has tackled Bower, AngularJS and Flask.

I found his posts on all 3 technologies interesting and well written. Bower was nowhere on my radar, and I only vaguely knew what Flask was.

I will definitely be following his progress.

How to change the side bar fonts in Sublime Text 2

2013-09-11T05:55:00.002-04:00

This information is available in the forums under a few posts.

The settings that need to be changed are located in Default.sublime-theme. I'm using Fedora so the file is located at, [HOME]/.config/sublime-text-2/Packages/Theme - Default/Default.sublime-theme.

Add the font size to "sidebar_heading" and "sidebar_label."

{
        "class": "sidebar_heading",
        "color": [130, 130, 130],
        "font.bold": true,
        "shadow_color": [250, 250, 250],
        "shadow_offset": [0, 1],
        "font.size": 16
    },

Toggle sidebar in Sublime Text

2013-05-07T05:50:00.001-04:00

The more I use Sublime Text the more I like it.

One thing that is missing (at least in the Linux version) is a shortcut to toggle the side bar. The Mac version used to use "ctrl+s", but that's what I associate with saving a file. I added a shortcut for "ctrl+b"; "b" for "bar" :

{ "keys": ["ctrl+b"], "command": "toggle_side_bar" }

To add this choose Preferences -> Key Bindings User

Be sure to add a comma to the line above as well.

Siently add a management user in JBoss EAP6/AS7

2013-05-06T13:24:00.003-04:00

Adding a management user is required and simple to doin EAP6. AS7 is the same even though its a dead branch.

If you need to add the user silently simply add the "--silent=true" flag to the command :

jboss-eap-6.0/bin/add-user.sh --silent=true <username> <password> [ManagementRealm]

bash: javaws: command not found...

2013-03-28T10:11:00.002-04:00

I'm currently running Fedora 17. I got the following error starting up a .jnlp file for a web conference :

bash: javaws: command not found...

I checked alternatives, but there was no javaws. A quick yum install solved it :

sudo yum install icedtea-web

Fedora, docking stations and external monitors

2013-03-15T08:53:00.002-04:00

I am running Fedora 17 and using a docking station with an external monitor. Beefy Miracle does not play well in this scenario; apparently Fedora 18, Spherical Cow, doesn't either.

I found the answer on the blog "Note to Self", http://note-to-self.baker.com/. This blog post has a solution for 17, and this post has one for 18.

find and mv files in bash

2012-12-18T09:31:00.000-05:00

I thought I would document this shell command for posterity's sake. My bash skills are sketchy so I will need to look it up again.

I downloaded a few zip files this morning and needed to move them to a new directory. Moving them to a new directory from the command line was trivial:

for i in $(find . -type f -newermt 2012-12-18); do cp $i /[NEW DIRECTORY PATH/; done;

You have already activated torquebox...

2012-12-10T16:58:00.005-05:00

Working with TorqueBox this afternoon I got the following error just after creating a new application :

You have already activated torquebox-core 2.1.2, but your Gemfile requires torquebox-core 2.0.3.redhat.1. Using bundle exec may solve this.

A quick check inside my .rvm/gems/jruby-1.6.7.2@appname/ folder showed that I had two versions of torquebox installed :

I deleted the incorrect version, 2.1.1. Everything was fine.

Fedora fonts and infinality.net

2012-08-14T14:49:00.000-04:00

I use Fedora, and I really like Gnome 3. Gnome-shell is extremely productive. However, Fedora is not known for the beauty of its' fonts.

A colleague suggested that I install the infinality fonts from infinality.net
.

Run :
sudo yum install fontconfig-infinality
sudo yum install freetype-infinality

Fedora looks great.

Be careful though : it deleted a lot of my preferences.

rvm requirements

2012-07-03T21:58:00.001-04:00

I recently upgraded to Fedora 17, Beefy Miracle. The first time I used rvm to install a gem I got the following :

ERROR:  Loading command: install (LoadError)
    no such file to load -- zlib
ERROR:  While executing gem ... (NameError)
    uninitialized constant Gem::Commands::InstallCommand

I ran :

rvm notes

and

rvm requirements

And installed everything listed as a requirement for Fedora 17. That still didn't do the trick. I reinstalled 1.9.2 with :

rvm install 1.9.2

And finally :

sudo yum install -y gcc ruby-devel libxml2 libxml2-devel libxslt libxslt-devel1.9.2

Finally!

The moral of the story is :

run rvm requirements
check the error logs if there are any (the location is the last line of the output)

Fun with RVM

2012-05-16T09:29:00.001-04:00

I typically work with jRuby. I don't have "rvm use jruby" in my bash scripts, but I might as well.

I wanted to install awestruct this morning. I wanted to use C Ruby, or MRI.

The frst step for using awestruct is of course to install awestruct, gem install awestruct.

I got the following :

ERROR: Loading command: install (LoadError)
    no such file to load -- zlib
ERROR: While executing gem ... (NameError)
    uninitialized constant Gem::Commands::InstallCommand


I tried to install zlib with RVM :
rvm pkg install zlib

Unfortunately that didn't work:
/home/jeremy/.rvm/scripts/functions/pkg: line 52: cd: /home/jeremy/.rvm/src/zlib-1.2.6: No such file or directory
Configuring zlib in /home/jeremy/.rvm/src/zlib-1.2.6.
Error running ' ./configure --prefix="/home/jeremy/.rvm/usr" ', please read /home/jeremy/.rvm/log/zlib/configure.log
Compiling zlib in /home/jeremy/.rvm/src/zlib-1.2.6.
Error running 'make ', please read /home/jeremy/.rvm/log/zlib/make.log

I tried the quick fix from the RVM site, https://rvm.io/packages/zlib/.
Reinstalled Ruby with :
rvm reinstall 1.9.2
rvm use 1.9.2
gem install awestruct

And back to work.