My Pirate Name a.k.a Something less serious

My pirate name is:

Dirty Jack Kidd

You're the pirate everyone else wants to throw in the ocean -- not to get rid of you, you understand; just to get rid of the smell. Even though you're not always the traditional swaggering gallant, your steadiness and planning make you a fine, reliable pirate. Arr!

Get your own pirate name from piratequiz.com.
part of the fidius.org network

Preventing ConcurrentModificationExceptions!

I have encountered several times now, and its very annoying since the error happens randomly. After a bit of googling, I found out that using unsynchronized JAVA collections yields unpredictable results. I am hoping that synchronizing my JAVA collections manually could solve this problem. To do this, I will have to use the ready made JAVA Collections synchronize wrapper:

For example if I use the List interface like this before:

List list = new ArrayList();

I will have to wrap the ArrayList implementation using the Collections synchronize method:

List list = Collections.sychronizedList(new ArrayList);

OR

List list = new ArrayList();
list = Collections.sychronizedList(list);

I hope this works. I will refactor my code now and will update this post once I find out what happens.

EDIT: It works! You just have to synchronize the list before iterating through them :)

Set Character Encoding to log4j's File Log

Working with east asian characters? Do you want log4j to print out utf-8 characters on your log file? Here is how:

When you're using a log4j.properties file:

log4j.appender.R=org.apache.log4j.DailyRollingFileAppender
log4j.appender.R.encoding=UTF-8

When youre using a log4j.xml file:

<appender name="R"
              class="org.apache.log4j.DailyRollingFileAppender">
        <param name="File" value="info-log.log"/>
        <param name="Encoding" value="UTF-8"/>
        ...
        ...
</appender>

Enjoy!

Loading a file from classpath

There are instances that you want to load a certain file from your classpath, the following code does that:

private InputStream getFileFromClassPath(String fileName) throws IOException {

        ClassLoader cl = ClassLoader.getSystemClassLoader();
        URL url = cl.getResource(fileName);
        if (url == null) {
            throw new NullPointerException("File with filename " + fileName + " not found on classpath");
        } else {
            return url.openStream();
        }
       
 }

How to define multiple PropertyPlaceholderConfigurer beans

I came across a problem today regarding the app that I am working on wherein I have to define a different PropertyPlaceholderConfigurer bean for each of my context xml files. (Each context xml file is imported in another xml file so it became a little bit tricky).

What I did was, I defined a PropertyPlaceholderConfigurer bean on the first context xml file and I defined another one on the second, so that each context xml can have it's own distinct PropertyPlaceholderConfigurer bean. But upon doing so, I got the following error

Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'myClass' defined in class path resource [spring-config.xml]: Could not resolve placeholder 'props.value.2'

After google-ing a bit I found the answer to my problem on an entry on Parth Barot's blog. Please take a look!

Loading a properties file using spring

Example properties file with filename:  fileOnHardDrive.properties

env.protocol=http

env.host=www.blogger.com

On your spring config file, you can load the properties file using the following code

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
        <list>
            <value>classpath:fileOnClasspath.properties</value>
            <value>file:fileOnHardDrive.properties</value>
        </list>
        </property>
</bean>

after that, you can now use the values on your properties file by using their key enclosed by a dollar sign and two curly braces. Example code:

<bean id="myUrl" class="java.net.URL">
        <constructor-arg value="${env.protocol}://${env.host}"/>
</bean>

Spring will now interpret the constructor arg value to be:

http://www.blogger.com
 

:) 

Spring and Hibernate

Personally, I don't like Spring (maybe because I didnt understand anything when the instructor taught it), but I LIKE hibernate (maybe because I got it on the first try because I just copy / pasted code) xD. SO ANYWAY I have to post code snippets here when I learn enough.

NOTE TO SELF: You have a blog.

(I hope I remember that note after a day or so haha ha.)

UPDATE [September 29, 2009]: Okay now I like Spring, I actually LOVE it. I don't like Hibernate anymore because after 5 months of not using it, I totally forgot how to use the thing. But hey! maybe I'll like it again after a while you never know! :D

Visitor Map

Get Your Own Real Time Visitor Map!

Gundam 00 S2 - Episode 20

Gundam 00 S2 Ep20 is out! Just woke up this morning, and it's there in it's shining brilliance and beauty! Download the episode via torrent on http://shinsen-subs.org. Get it while it's hot guys!

"Stick 'em up!"

"Don't shoot the pretty girl!"

"Nuuuuu!"

They didnt show this scene before. O_O

Louise! Dont fall for Ribbons' geass! err.. wrong anime.

Curving beams eh? Reminds me of Hisoka's gummy power something.

Lyle is a really aggressive guy.

Yeah right.

Line of The Day

"Hi, I seem to have lost my number, can I borrow yours?"

Hello World

Hello This is my first post, I have a lot of plans for this blog, but for the meantime Ill just place a single post here and Ill just edit it afterwards. Okay? Alright...