mtw

Installing Mondrian

2011-11-21T18:32:00.001+08:00

After series of disappointments, I finally figured out how to install mondrian on Mac. Definitely, the documentation at Pentaho was not helpful enough for a beginner like me. So I googled for hours to find sites that would help me. There, I found http://computersight.com/software/how-to-install-mondrian-the-complete-guide/. However, upon executing #12, I encountered this error:

Exception in thread "main" java.lang.NoClassDefFoundError: org/olap4j/mdx/IdentifierSegment at mondrian.test.loader.MondrianFoodMartLoader.(MondrianFoodMartLoader.java:100)

Caused by: java.lang.ClassNotFoundException: org.olap4j.mdx.IdentifierSegment

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

... 1 more

I thought I must have messed up my classpath. But after looking into it several times, I found that nothing's wrong. Finally, I tried this:

java -cp "/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/mondrian.jar:/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/log4j-1.2.8.jar:/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/eigenbase-xom.jar:/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/eigenbase-resgen.jar:/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/eigenbase-properties.jar:/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/commons-logging-1.0.4.jar:/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/commons-collections-3.1.jar:/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/olap4j.jar:/Library/Tomcat/apache-tomcat-7.0.22/webapps/mondrian/WEB-INF/lib/mysql-connector-java-5.1.6-bin.jar" mondrian.test.loader.MondrianFoodMartLoader -verbose -tables -data -indexes -jdbcDrivers=com.mysql.jdbc.Driver -inputFile=/usr/local/mondrian/demo/FoodMartCreateData.sql -outputJdbcURL="jdbc:mysql://localhost/foodmart?user=foodmart&password=foodmart"

And "Yey!", it worked! The error was caused by missing libraries (commons-collections, commons-logging, and olap4j).

Now, I'm studying how to use Mondrian and experimenting on the FoodMart demo.

Setting Up Slick2d with Eclipse

2011-09-12T16:42:00.000+08:00

I developed my first computer game with Slick2d game engine. Yey! This post, and (maybe) the following posts will show how I created the game. For now, let's start with setting up the development environment.

First, you need to download the following libraries:

Slick2d Library from http://slick.cokeandcode.com/
LWJGL from http://lwjgl.org/
I assume you have your Eclipse installed on your computer, if not download Eclipse from http://www.eclipse.org/downloads.

Open your Eclipse and start a new Java Project

Go to File->New->Java Project. New project window will open. After giving name to the project (in this case "Project1"), click "Finish".

On the project explorer window, right click the project, and select "Properties".

Select "Java Build Path", then "Libraries" tab, then "Add External JARs". Locate and add the lwjgl.jar and slick.jar files.

Now, it's time to set up the lwjgl natives. Click the arrow beside the lwjgl.jar then select "Native Library Location". Locate the lwjgl folder, open the natives folder and choose the native that is appropriate for your OS.

And that's it, we're done! You may now try to create slick2d games.

Hello, World!

2011-09-06T18:20:00.000+08:00

printf("Hello, Blogspot!");

printf("OK, I'm starting this new blog. ~~I'll try to post every monday, tuesday, wednesday~~. ");

printf("It will cover anything under the sky. But will mostly feature my programming and hiking activities.");

exit();