Friend of Eclipse

Abner — Wed, 28 Oct 2009 03:56:30 +0000

Transformers in JAVA & Spring Framework

Abner — Mon, 16 Mar 2009 20:23:32 +0000

I’ve got a surprise when I saw this at Spring Web Service source code:

Yeah!, there’s the code to create transformers!!!,… but transformers created with that function are autobots or decepticons? I wanted to find an answer so I went to the magic function createTransformer().

Transformer factory! It isn’t at Cibertron as everyone would expected, the TransformerFactory class is part of J2SE and you can see its javadoc here,…. LOL!

Java Song Video

Abner — Thu, 15 Jan 2009 19:26:00 +0000

Long time ago I wrote about Java Song by Loose Bruce! This funny guy published a lot of songs in youtube most of them are not related to computer science but they’re still so funny.

Links:

Search at youtube for more videos,…. I need to sleep!

Logs! logs!

Abner — Thu, 13 Mar 2008 20:12:51 +0000

Auditando un componente desarrollado por una consultora encontre este peculiar mensaje de error:

[2008-02-21 10:31:57] - [ERROR] (SolicitudPortlet.java:325) - Usted no posee suficiente autonomia

Con toda seguridad un sysadmin diría: WTF is that?

Installing Geronimo 2.0

Abner — Wed, 29 Aug 2007 16:43:14 +0000

Geronimo 2.0.1 has been released! There are a lot of new features, all of them made Geronimo a fully compliant and certified Java Enterprise Edition 5.0 container. So, it’s time to play with it!

Getting binaries

First of all, we have to download JDK 1.5 or greater from here. If you prefer, you could use the default package of your favorite distribution but in my case, I usually need different versions of JDK, so, I prefer to manage the JDK by myself.

modlost:~$ ls ~/download
jdk-6-linux-i586.bin

A good question is where we will install that JDK?, well, It’s better to follow FHS and try to keep everything clean in your hard disk. It’s difficult sometimes but It’s better for maintenance. Let’s install JDK in /opt directory.

modlost:~$ mkdir -p /opt/java/sun/
modlost:~$ cp ~/download/jdk-6-linux-i586.bin /opt/java/sun
modlost:~$ cd /opt/java/sun
modlost:/opt/java/sun$ chmod 755 jdk-6-linux-i586.bin
modlost:/opt/java/sun$ ./jdk-6-linux-i586.bin

Follow the instructions and you’ll get:

modlost:/opt/java/sun$ ls -F
jdk-6-linux-i586.bin*   jdk1.6.0/
modlost:/opt/java/sun$ ln -s jdk1.6.0 jdk1.6

It’s time to download Geronimo with Tomcat from here. I prefer to use Tomcat, but Jetty is also a good web container. It’s up to you.

modlost:~$ ls ~/download
jdk-6-linux-i586.bin    geronimo-tomcat6-jee5-2.0.1-bin.tar.gz

As you may imagine, We’ll install Geronimo in /opt directory

modlost:~$ mkdir -p /opt/java/apache/
modlost:~$ cp ~/download/geronimo-tomcat6-jee5-2.0.1-bin.tar.gz /opt/java/apache
modlost:~$ cd /opt/java/apache
modlost:/opt/java/apache$ tar xzf geronimo-tomcat6-jee5-2.0.1-bin.tar.gz
modlost:/opt/java/apache$ ls -F
geronimo-tomcat6-jee5-2.0.1/   geronimo-tomcat6-jee5-2.0.1-bin.tar.gz
modlost:/opt/java/apache$ ln -s geronimo-tomcat6-jee5-2.0.1 geronimo2.0

Geronimo Configuration

Geronimo needs to find the JDK that we installed before. The easiest way to do this is creating the setenv.sh file

modlost:~$ cd /opt/java/apache/geronimo2.0
modlost:/opt/java/apache/geronimo2.0$ echo "JAVA_HOME=/opt/java/sun/jdk1.6" > bin/setenv.sh
modlost:/opt/java/apache/geronimo2.0$ echo "JAVA_OPTS=-Xms128M -Xmx256M" >> bin/setenv.sh

Well, let’s start Geronimo:

modlost:~$ /opt/java/apache/geronimo2.0/bin/startup.sh

Now, you can continue configuring Geronimo itself. Open a web browser and go to http://localhost:8080/console/, the default configuration has a default user: system with password: manager. I’ll cover this topic in another article.

Let’s go and play with Geronimo 2.0.1!!