Dropbox on Ubuntu12

Check this if dropbox broken on ubuntu
http://www.muktware.com/3742/dropbox-broken-linux



32-bit:
cd ~ && wget -O - "https://www.dropbox.com/download?plat=lnx.x86" | tar xzf -

64-bit:
cd ~ && wget -O - "https://www.dropbox.com/download?plat=lnx.x86_64" | tar xzf -

Now run the Dropbox daemon from the newly created .dropbox-dist folder.
~/.dropbox-dist/dropboxd

Maven Plugins

Some plugins I recently used,

For releasing or version updating,
Release plugin
Version plugin

Sharing resource between projects
Assembly plugin
Dependency plugin

See what process is using a TCP port in Windows

It is annoying to see "address already in use" in log files.

To check which process uses TCP port in windows,
1) netstat -ano
find the right port and remember the PID
2)tasklist /svc /FI "PID eq ${PID}"

Original Post

Checkstyle suppression configuration in Maven

Recently I ran into this checkstyle configuration problem. Basically we have this multi-module maven project and we would like to put checkstyle config and suppression in the parent maven pom but apparently checkstyle maven plugin not very happy with the relative path of suppression config file, for example


<suppressionsFileExpression>checkstyle.suppressions.file</suppressionsFileExpression>
<suppressionsLocation>config/checkstyle-suppressions.xml</suppressionsLocation>

During the build modules look for checkstyle-suppressions.xml at its own directory not parent and checkstyle plugin just simply ignores the error when file not found. Some people had the same problem with me on Stackoverflow and here too. I just choose the easy solution to add a new property in both parent and children pom files to set the correct location of the config file. 

parent pom

<suppressionsFileExpression>checkstyle.suppressions.file</suppressionsFileExpression>

<suppressionsLocation>${main.basedir}/config/checkstyle-suppressions.xml</suppressionsLocation>

<main.basedir>${project.basedir}</main.basedir>

children pom

<main.basedir>${project.basedir}/..</main.basedir>

And there is another way, I guess the better one, to share resource across project in Maven here.

New Maven Archetype

Just build another maven archetype using maven3, spring3, freemarker and selenium web driver.

Archetype artifact available here. Use maven install the artifact then


mvn archetype:generate                                                 \
  -DarchetypeGroupId=au.com.melbourne.ben               \
  -DarchetypeArtifactId=prototype-archetype                 \
  -DarchetypeVersion=1.0-SNAPSHOT                        \
  -DgroupId=[Your Group Id]                                        \
  -DartifactId=[Your Artifact Id]

JEE application on amazon cloud and amazon web services

I would like to try things on amazon EC2. And looks like there are some very good AMIs to chose.
http://aws.amazon.com/amis

Some readings to start your own AMIS
http://chris-richardson.blog-city.com/running_jee_applications_on_amazon_ec2_or_deploying_to_20_m.htm
http://aws-musings.com/how-to-deploy-a-java-web-application-on-ec2-instance/
https://help.ubuntu.com/community/EC2StartersGuide



amazon web service
http://hop2croft.wordpress.com/2011/06/21/getting-started-with-amazon-web-services/

Apache Cassandra and NoSQL Database

These are some wonderful readings for people new to NoSQL Database and Cassandra.


wtf-is-a-supercolumn-cassandra-data-model

that-no-sql-thing-column-family-databases