Make It Open

Struts2:

2009-01-21T20:55:00.005+01:00

In case of specifying the url for the image in struts2, you can write as follows.


<s:iterator value="books" status="rowstatus">
<s:url id="url" value="%{bookImagePath[#rowstatus.index]}"/>
 <img src="${url}" alt="Book image" align="top"/>
</iterator>

ERROR JDBCExceptionReporter - Duplicate entry

2009-01-08T23:14:00.002+01:00

By using mysql, I faced the followin error and here is the solution

2009-01-08 22:55:18,454  WARN JDBCExceptionReporter - SQL Error: 1062, SQLState: 23000
2009-01-08 22:55:18,454 ERROR JDBCExceptionReporter - Duplicate entry '268731' for key 1
2009-01-08 22:55:18,454 ERROR AbstractFlushingEventListener - Could not synchronize database state with sessi
org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update

Close the session after transaction.commit().

transaction.commit();
session.flush();
session.close();

Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost

2009-01-08T23:11:00.002+01:00

I faced the following error and here is the solution.

  ** BEGIN NESTED EXCEPTION **

java.io.EOFException
MESSAGE: Can not read response from server. Expected to read 4 bytes, read 2
bytes before connection was unexpectedly lost.

STACKTRACE:

java.io.EOFException: Can not read response from server. Expected to read 4
bytes, read 2 bytes before connection was unexpectedly lost.

Comment the wait_timeout such as below.

#wait_timeout=30

SocketException: Too many open files

2009-01-06T15:10:00.003+01:00

If you see the following error,

java.net.SocketException: Too many open files

Try to change the max open file value for the user


#check current value by calling
ulimit -a
#Set new max open file
ulimit -n 102400

as well as the OS


#Check current value
cat /proc/sys/fs/file-max
#Set the new max open file by adding the following 
vi /etc/sysctl.conf
--
fs.file-max = 49500
--

SQL Error: 0, SQLState: 08S01

2008-12-23T09:47:00.002+01:00

If you see the such a error by using hibernate3, you need the following to avoid it.

JDBCExceptionReporter　SQL Error: 0, SQLState: 08S01

In hibernate.cfg.xml, write


<property name="c3p0.min_size">5</property>
<property name="c3p0.max_size">20</property>
<property name="c3p0.timeout">1800</property>
<property name="c3p0.max_statements">50</property>

Then create "c3p0.properties" in your root classpath folder and write

c3p0.testConnectionOnCheckout=true
c3p0.acquireRetryDelay=1000
c3p0.acquireRetryAttempts=1

Illegal mix of collations in MySQL

2008-12-10T09:12:00.001+01:00

In case for having such a error in mysql using Hibernate or so.


java.sql.SQLException: General error message
from server: "Illegal mix of collations
 (utf8_general_ci,COERCIBLE) and 
(latin1_swedish_ci,IMPLICIT) for operation '='"

Add the following in my.cnf

[client]
default-character-set = utf8

[mysqld]
skip-character-set-client-handshake
default-character-set=utf8
character-set-server=utf8
init-connect=SET NAMES utf8

Apache2.2 : AuthUserFile Error

2008-11-17T11:10:00.002+01:00

<Location /svn>
       DAV svn
       SVNParentPath "/var/svn"
       AuthzSVNaccessFile /var/svn/.htpasswd
       AuthType Basic
       AUthName "Dev Project"
       AuthUserFile /var/svn/.htpasswd
</Location>

I set the basic authentication such as above which ended up the below error.

# /etc/init.d/apache2 reload
Syntax error on line 64 of /etc/apache2/mods-enabled/dav_svn.conf:
Invalid command 'AuthUserFile', perhaps misspelled or defined by a module not included in the server configuration

Since below,

$ for i in /usr/lib/apache2/modules/*; do strings $i | grep -q -i AuthUser && echo $i; done
/usr/lib/apache2/modules/mod_authn_file.so
$ ls /etc/apache2/mods-available/authn_file.load
/etc/apache2/mods-available/authn_file.load

You need to do as follow,

$ sudo /usr/sbin/a2enmod authn_file
Module authn_file installed; run /etc/init.d/apache2 force-reload to enable.
$ /usr/sbin/apache2ctl configtest
Syntax OK

JBoss Setting

2008-11-14T20:01:00.004+01:00

After the installation of JBoss, here is the know-how of its setting.

1) Heap size

$ sudo vim $JBOSS/bin/run.conf

JAVA_OPTS="-Xms128m -Xmx512m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000"
=>
JAVA_OPTS="-Xms512m -Xmx768m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000"

2) Port check

vim $JBOSS/server/default/deploy/jboss-web.deployer/server.xml

3) Transaction time out

vim $JBOSS/server/default/conf/jboss-service.xml

300
=>
150

4) Thread number

vim server/default/deploy/jboss-web.deployer/server.xml

maxThreads="250"
=>
maxThreads="200"

5) Log Output level by log4j

vim /opt/jboss-4.2.3.GA/server/default/conf/jboss-log4j.xml 
   <root>
     <priority value="WARN" />
      <appender-ref ref="CONSOLE"/>
      <appender-ref ref="FILE"/>
   </root>

Struts2 and Hibernate v3 Min. Lib.

2008-11-13T11:59:00.002+01:00

Those are the minimum required libraries for Struts2 and Hibernate v3.

Struts2

-commons-logging
-freemaker
-ognl
-struts2-core
-xwork

JBoss

-hibernate3
-antlr
-comons-collection
-dom4j
-javassist
-jta
-slf4j-api

Log4J Log rotate

2008-08-18T18:40:00.002+02:00

It's better to log rotate by Java side than using Linux/Unix logrotate.
This is the example for log4J v1.2x (The v1.3 development is stopped by the way.) series , "log4j.xml" file.

By using DailyRollingFileAppender, you can log rotate as the date base.


<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
 <!--Definition of the File Appender -->
    <appender name="file" class="org.apache.log4j.DailyRollingFileAppender">
     <!-- Date pattern policy -->
        <param name="DatePattern" value=".yyyy-ww" />
      
      <param name="File" value="logs/hibernate.log"/>
      <!-- Log append -->
     <param name="Append" value="true" />
     
     <!-- Log layout -->
     <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d %5p %c{1} - %m%n" />
      </layout>
     
     <!-- Default log level -->
     <param name="threshold" value="info"/>
     
    </appender>
    
    <!--Console log appender -->
    <appender name="stdout" class="org.apache.log4j.ConsoleAppender">
     <!-- Default log level -->
        <param name="threshold" value="info"/>
        <!-- log layout -->
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %5p %c{1} - %m%n"/>
        </layout>
    </appender>

  <root>
    <appender-ref ref="stdout"/>
    <appender-ref ref="file"/>
  </root>
</log4j:configuration>

File code converting

2008-06-07T02:00:00.002+02:00

After moving from Windows dev. environment to Linux, source file needs to be converted to UTF8 from Shift_JIS. It's done easily.

 find ./* -type f -name '*.java' -exec nkf -Luw --overwrite {} \;

Flv file convert

2008-05-27T21:56:00.006+02:00

Flv file convert to music format

.flv to mp3

$ ffmpeg -i xxx.flv -vn -acodec aac -ab 128k -ac 2 -ar 44100 -y test.mp3

.flv to aac

$ ffmpeg -i xxx.flv -vn -acodec mp3 -ab 128k -ac 2 -ar 44100 -y test.mp3

.flv to mp4

$ ffmpeg -bitexact -y -i OLD_TOWN.flv -vcodec mpeg4 -s 320x240 -r 25 -b 480k -acodec aac -ac 2 
-ar 22050 -ab 69k out.mp4

To cut mp3 then

$ sudo apt-get install poc-streamer
#mp3cut [ -o outputfile ] [ -T title ] [ -A artist ] [ -N album-name ] 
[ -t [hh:]mm:ss[+ms]-[hh:]mm:ss[+ms] ] mp3file [[ -t … ] mp3file1 …]

$ mp3cut -o cut.mp3 -t 00:08-00:49 test.mp3

Awstats for Ubuntu

2008-05-21T17:16:00.004+02:00

awstats is log analyzer I use it for tomcat log analysis.


<Host name="localhost" appBase="webapps" >
        <Valve className="org.apache.catalina.valves.AccessLogValve"
        directory="logs" prefix="ich_access_log."
        suffix=".txt" pattern="combined" resolveHost="false" / >
</Host >

Setting for awstats


cp -r /usr/share/awstats/icon /var/www/awstats-icon
/usr/lib/cgi-bin/awstats.pl -config=hostname -update

Then access to :http://hostname/cgi-bin/awstats.pl?config=hostname

Edit cron


crontab -e
--
0 1 * * * /usr/lib/cgi-bin/awstats.pl -config=hostname -update

Firefox3 Plugins

2008-05-14T23:16:00.002+02:00

I've been using Hardy 8.04 which implements Firefox3.0b5.
Still many of FF plug-ins are not supported for FF3. If you want to use it by any means.


1) about:config 
2) Choose New>Boolean. Then "checkCompatibility" to "false".
3) Choose New>Boolean. "checkUpdateSecurity" to "false".
4) Restart Firefox and done ;-)

Change the folder name in English

2008-03-06T10:38:00.001+01:00

Change the default folder such as Music/Document etc. name in English.

LANG=C xdg-user-dirs-gtk-update

zshrc

2008-02-25T23:11:00.001+01:00

mine


# Created by newuser for 4.3.4

export JAVA_HOME=/usr/lib/jvm/java-6-sun
export PATH=$PATH:/opt/apache-maven-2.0.8/bin

alias eclipse='/opt/eclipse/eclipse'
alias update='sudo apt-get update'
alias upgrade='sudo apt-get upgrade'
alias du="du -h"
alias df="df -h"
alias ps="ps -aux"

# For auto compinit
autoload -U compinit
compinit

# For prompt
PROMPT="%/%% "
PROMPT2="%_%% "
SPROMPT="%r is correct? [n,y,a,e]: "

# For title bar
case "${TERM}" in
kterm*|xterm)
    precmd() {
        echo -ne "\033]0;${USER}@${HOST%%.*}:${PWD}\007"
    }
    ;;
esac

# For history function
HISTFILE=~/.zsh_history
HISTSIZE=10000
SAVEHIST=10000
setopt hist_ignore_dups     # ignore duplication command history list
setopt share_history        # share command history data

# For History search shortcut
autoload history-search-end
zle -N history-beginning-search-backward-end history-search-end
zle -N history-beginning-search-forward-end history-search-end
bindkey "^P" history-beginning-search-backward-end
bindkey "^N" history-beginning-search-forward-end

# Editor vi mode
bindkey -v

# For remembering the previous folder
setopt auto_pushd

# No beep
setopt nolistbeep

# For auto-prediction function
autoload predict-on
predict-on

Ubuntu Gutsy Step1

2008-02-09T21:48:00.000+01:00

I just bought Dell Inspiron 1720 for my private note PC.
I certainly decided to delete Vista and then install Ubuntu for the box.
This is step by step set up for my reminder.
I skip writing the way to add apt line or so as it is too easy procedure to forget.

*Sound - you need to install the following package to enable the sound


$ sudo apt-get install linux-backports-modules-generic

1) I suggest to visit here for your little preparation
http://easylinux.info/wiki/Ubuntu:Gutsy

2) Font installation


#Mplus
% sudo cp /usr/share/fonts/truetype/ipa/ipag.ttf .
% sudo fontforge -script m++ipa.pe
% sudo mkdir /usr/share/fonts/truetype/mplus
% sudo mv M*IPAG.ttf /usr/share/fonts/truetype/mplus/.
% sudo fc-cache -f -v /usr/share/fonts/truetype/mplus

#Mikacha for the same step

3) Then go to forum to see what you want to do.
http://ubuntuforums.org/

4) Adobe related s/w
Flash capability is important. Visit adobe page to download the flash player.


$ tar zvxf install_flash_player_9_linux.tar.gz 
$ cd install_flash_player_9_linux/
$ sudo ./flashplayer-installer 

--
Copyright(C) 2002-2006 Adobe Macromedia Software LLC.  All rights reserved.
Adobe Flash Player 9 for Linux
Adobe Flash Player 9 will be installed on this machine.
You are running the Adobe Flash Player installer as the "root" user.
Adobe Flash Player 9 will be installed system-wide.
Support is available at http://www.adobe.com/support/flashplayer/
To install Adobe Flash Player 9 now, press ENTER.
To cancel the installation at any time, press Control-C.
NOTE: Please exit any browsers you may have running.
Press ENTER to continue...
Please enter the installation path of the Mozilla, Netscape,
or Opera browser (i.e., /usr/lib/mozilla): /usr/lib/firefox

----------- Install Action Summary -----------
Adobe Flash Player 9 will be installed in the following directory:
Browser installation directory = /usr/lib/firefox
Proceed with the installation? (y/n/q): y
Installation complete.
Perform another installation? (y/n): n
Please log out of this session and log in for the changes to take effect.
The Adobe Flash Player installation is complete.

#Then PDF
$sudo aptitude install acroread acroread-plugins acroread-escript
$sudo aptitude install mozilla-acroread

--set at the first launch :: Edit -> Prefences -> Interne
 Browser Executable: /usr/bin/firefox
 libgtkembedmoz Folder: /usr/lib/firefox/

5) java capability


$ sudo apt-get install sun-java6-jre sun-java6-plugin
$ sudo update-java-alternatives -s java-6-sun
$ sudo vim /etc/jvm
--
#Add the following line in the top of the file
/usr/lib/jvm/java-6-sun

MySQL5 character set

2008-01-11T00:08:00.001+01:00

All you need to edit my.cnf in order not to write the command like "set name xxx" everytime you restart the service.


[client]
default-character-set = utf8

[mysqld]
skip-character-set-client-handshake
default-character-set = utf8
character-set-server = utf8
collation-server = utf8_general_ci
init-connect = SET NAMES utf8

[mysqldump]
default-character-set = utf8

[mysql]
default-character-set = utf8

In order to check the charset


mysql> shwo variables like 'char%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | latin1                     |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+

#Then set charset
mysql>set character_set_database=utf8
mysql> show variables like 'char%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+

Maven2 deploy to other server

2007-12-09T23:22:00.000+01:00

Create file settings.xml under .m2

<?xml version='1.0' encoding='utf-8' ?>
<settings>
  <servers>
    <server>
      <id>scp-repository</id>
      <username>cavalier</username>
      <privateKey>C:\Program Files\PuTTY\auth\id_rsa</privateKey>
      <passphrase>xxxxxx</passphrase>
      <filePermissions>664</filePermissions>
      <directoryPermissions>775</directoryPermissions>
    </server>
  </servers>
</settings>

Then add the following to pom.xml

<distributionManagement>
 <repository>
 <id>scp-repository</id>
 <url>scp://192.168.0.xx/home/cav/repository</url>
 </repository>
</distributionManagement>

maven2 java version

2007-12-09T23:09:00.000+01:00

You might need to specify the compile java version by using generics etc in pom.xml file.

<project>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

Eclipse3.3.1 OutOfMemory

2007-12-01T22:13:00.000+01:00

Eclipse 3.3.1 has bug on memory part.
https://bugs.eclipse.org/bugs/show_bug.cgi?id=92250

Edit the "eclipse.ini" to fix the issue.

-showsplash
org.eclipse.platform
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Xms512m
-Xmx768m
-XX:MaxPermSize=256m

Maven + Eclipse = Error?

2007-12-01T21:54:00.000+01:00

If you face the something like the following error,

Unbound classpath variable: ‘M2_REPO/bouncycastle/bcmail-jdk14/132/bcmail-jdk14-132.jar


Select the Eclipse Project folder from the Navigator window view
Right Click and get the Project Properties.
Select the tree item named “Java Build Path”
Push the button on the Right that says Add Variables.
Then Push the button that says Configure Variables.
Then push the New button
Add a new variable named M2_REPO and map it to the directory that contains the repository above.
Exit back to the “New Variable Classpath entry” dialog.
Select the M2_REPO variable and click extend
Select a jar file and exit.

Maven2 : Adding jar to local repos

2007-12-01T21:50:00.000+01:00

This is how you can add the Non globally installed jar to your local repos.

mvn install:install-file -DgroupId=<<$Group Name>> -DartifactId=<<$Project Name>> \
-Dversion=<<$S/W version>> -Dpackaging=jar -Dfile=<<$Path to the jar file>>

Trac Installation

2007-11-30T23:26:00.000+01:00

For Ubuntu 7.10.

$ apt-get install trac
$ sudo mkdir /var/trac
$ cd /var/trac
$ trac-admin test initenv
$ chown -R www-data ./test

$ apt-get install libapache2-mod-python
$ vi /etc/apache2/sites-available/trac
--
 Alias /trac "/usr/share/trac/htdocs/"

 <Location "/tracsvn">
   SetHandler mod_python
 PythonHandler trac.web.modpython_frontend
 PythonOption TracUriRoot "/tracsvn"
 PythonOption TracEnvParentDir /var/local/trac
 AuthType Basic
 AuthName "DoJa Repository"
 AuthUserFile /etc/subversion/passwd
 Require valid-user
 SSLRequireSSL
</Location>
--
$ a2ensite trac
$ /etc/init.d/apache2 reload

Subversion Installation

2007-11-30T23:22:00.000+01:00

For Ubuntu 7.10

$ sudo apt-get install subversion libapache2-svn
$ sudo mkdir /var/svn
$ sudo svnadmin create /var/svn/$REPOS
$ sudo chown -R www-data:www-data /var/svn/$REPOS
$ sudo chmod -R g+ws /var/svn/$REPOS

Only allowing to access by SSL

$ sudo a2enmod ssl
$ sudo apt-get install ssl-cert

#In order to change the valid days up to 10years
#vi /usr/sbin/make-ssl-cert
--
openssl req -config $TMPFILE -new -days 365 -x509 -nodes -out $output -keyout $output  > /dev/null 2>&1
--
$ sudo make-ssl-cert /usr/share/ssl-cert/ssleay.cnf /etc/apache2/ssl/apache.pem
$ sudo chmod a+r /etc/apache2/ssl/apache.pem

$ cp /etc/apache2/sites-available/default /etc/apache2/sites-available/$SITENAME
$ sudo vim /etc/apache2/sites-available/$SITENAME
change:
NameVirtualHost *:443

add:
SSLEngine on
SSLCertificateFile /etc/apache2/ssl/apache.pem
SSLProtocol all
SSLCipherSuite HIGH:MEDIUM

MySQL Encoding

2007-11-29T16:31:00.000+01:00

You need to change params for the server and the client.

# Change MySQL server encode
# By calling the following SQL you can see the current encoding.
# show create table xxx;
# show variables like 'char%';

mysql$ alter table xxx character set utf8;
mysql$ alter table xxx change sub1 sub1 varchar(256) character set utf8;
mysql$ set names utf8;
mysql$ set character_set_database=utf8
mysql$ set character_set_server=utf8

#On the client to connet to DB set the following param in URL
jdbc:mysql://localhost/blojsom?autoReconnect=true&useUnicode=true&characterEncoding=utf-8

Bind Reload

2007-11-29T12:06:00.000+01:00

Bind reload command differs from the 8 or 9.

#Bind8
#/usr/sbin/ndc reload

#Bind9
#/usr/sbin/rndc reload

Eclipse Heap Memory

2007-11-23T14:05:00.000+01:00

This is how you can change the memory for Eclipse to use.

#vim $ECLIPSE_HOME/eclipse.ini
--
-vmargs
-Xms64m
-Xmx256m

Tomcat Heap Memory

2007-11-23T14:04:00.000+01:00

Here is the how we can change the setting of the memory used for tomcat.

set CATALINA_OPTS="-Xms512m -Xmx512m"  (Windows)
export CATALINA_OPTS="-Xms512m -Xmx512m"  (ksh/bash)
setenv CATALINA_OPTS "-Xms512m -Xmx512m"  (tcsh/csh)

Java:Loading the file

2007-11-23T14:00:00.000+01:00

The dev environment and the actual service server are different and often face the problem of path to the config file with FileNotFound Exception or so. Here is a solution.

URL propXML = this.getClass().getResource(RESFILE);
Configuration config = new XMLConfiguration(propXML);

ClassLoader loader = Thread.currentThread().getContextClassLoader();
DOMConfigurator.configure(loader.getResource("log4j.xml"));

Ubuntu: Change Timezone

2007-11-16T11:54:00.001+01:00

The way to change the timezone.

root # ln -s /usr/share/zoneinfo/Asia/Tokyo /etc/localtime
root # date -d

Formats decimal numbers by Java

2007-08-13T18:34:00.000+02:00

DecimalFormat df = new DecimalFormat("0000");
df.format(77);
#OUTPUT: 0077

DecimalFormat df = new DecimalFormat("####");
df.format(77);
#OUTPUT: 77

DecimalFormat df = new DecimalFormat("####%");
df.format(77);
#OUTPUT: 77%

DecimalFormat df = new DecimalFormat("'AA'####%");
df.format(77);
#OUTPUT: AA77%

DecimalFormat df = new DecimalFormat("\u00A5###,###");
df.format(7777);
#OUTPUT: \7,777

Struts2 by Maven for Eclipse

2007-08-02T19:25:00.000+02:00


mvn archetype:create -DgroupId=tutorial \
 -DartifactId=tutorial \
 -DarchetypeGroupId=org.apache.struts \
 -DarchetypeArtifactId=struts2-archetype-starter \
 -DarchetypeVersion=2.0.1-SNAPSHOT \
 -DremoteRepositories=http://people.apache.org/maven-snapshot-repository

cd tutorial
mvn -Dwtpversion=1.0 eclipse:eclipse

Tomcat & MySQL connection Error

2007-07-30T16:19:00.000+02:00

Long absense after establishing the connection to MySQL from Hibernate, you might face the error below:

,406 ERROR JDBCExceptionReporter - Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTIOROR JDBCExceptionReporter - Communications link failure due to underlying exception

java.io.EOFException
STACKTRACE:

java.io.EOFException
        at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1956)
        at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2368)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2867)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1616)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1708)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:3255)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1293)
        at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1428)
        at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139)
        at org.hibernate.loader.Loader.getResultSet(Loader.java:1669)
        at org.hibernate.loader.Loader.doQuery(Loader.java:662)
.....

Then you can add the following setting in configuration file of hibernate.

jdbc:mysql://localhost:3306/ichannel?autoReconnect=true

UnknownHostException @ Tomcat

2007-06-27T21:25:00.000+02:00


#vim /etc/hosts

--
192.168.0.100 hostname
--

Protocol Analyzer in CUI

2007-06-27T20:51:00.000+02:00

For CUI protocol analyzer,


#apt-get install tshark
#tshark -i eth0 -w `date "+%Y%m%d_capture.pcap"` -R "tcp.port==8080"

-w : output file
-R : filter

Maven with Eclipse A-Z

2007-06-22T23:58:00.000+02:00

The simplest A-Z for Maven with Eclipse.

$mvn archetype:create -DgroupId=xx.xx.XX -DartifactId=AppName -Dversion=0.0.1
$mvn eclipse:add-maven-repo -Declipse.workspace=/home/user/workspace
#Move to the project root folder, then..
$mvn eclipse:eclipse -DdownloadSources=true

It's done. Then import the project from the Eclipse and enjoy ;-)

AccessControlException By Java

2007-06-20T23:03:00.000+02:00

When you deploy the contents you might face the AccessControlException which is cased by java security manager. By Ubuntu packaged tomcat5.5, you can edit the policy file.

$sudo vim /etc/tomcat5.5/policy.d/99examples.policy

grant codeBase "file:${catalina.home}/webapps/gprs/-" {
        permission java.security.AllPermission;
}

The example above is the most loose security setting.

Hibernate cfg.xml file

2007-06-20T21:10:00.000+02:00

hibernate.cfg.xml file not found issue is the one which troubles us often when we create the web app with hibernate. Here is the workaround code for this issue.

File file=
new File(getServletContext().getRealPath("/WEB-INF/classes/hibernate.cfg.xml"));
SessionFactory sessionFactory =
new Configuration().configure(file).buildSessionFactory();

Ubuntu Java configuration

2007-06-17T01:53:00.000+02:00

In case you need to change the version of java runtime environment which has been installed on you machine. It's simple as this,

$  sudo /usr/sbin/update-alternatives  --config   java

Ubuntu Default editor change

2007-06-13T17:14:00.000+02:00

sudo update-alternatives --config editor

Ubuntu cron

2007-06-13T17:01:00.000+02:00

Crontab on Ubuntu doesn't work with normal grammer. You need to add.

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin

command > /dev/null 2>&1

Maven2 with Hibernate

2007-06-12T16:29:00.000+02:00

Maven cannot solve the dependency regarding jta as it is released by Sun and based upon their binary license it cannot be deployed on the maven repository.

You will see something like this below.

1) javax.transaction:jta:jar:1.0.1B
  Try downloading the file manually from: 
      http://java.sun.com/products/jta
  Then, install it using the command: 
      mvn install:install-file -DgroupId=javax.transaction -DartifactId=jta \
          -Dversion=1.0.1B -Dpackaging=jar -Dfile=/path/to/file
  Path to dependency: 
   1) RssUpdater:RssUpdater:package:0.0.1
   2) org.hibernate:hibernate:jar:3.2.4.ga
   3) javax.transaction:jta:jar:1.0.1B
1 required artifact is missing.
for artifact: 
  RssUpdater:RssUpdater:package:0.0.1
from the specified remote repositories:
  codehaus.org (http://snapshots.repository.codehaus.org/org/codehaus/mojo/),
  maven.seasar.org (http://maven.seasar.org/maven2),
  central (http://repo1.maven.org/maven2)

In order to avoid this, download jta and deploy it onto your local maven repos.

mvn install:install-file \
  -Dfile=./jta-1_0_1B-classes.zip \
  -DgroupId=javax.transaction \
  -DartifactId=jta -Dversion=1.0.1B \
  -Dpackaging=jar

Ubuntu webdav

2007-06-07T11:15:00.000+02:00

The problem probably you face as followed.

[Sat May 19 13:20:21 2007] [notice]
Apache/2.2.3 (Ubuntu) DAV/2 PHP/5.2.1 configured 
-- resuming normal operations
[Sat May 19 13:20:53 2007] [error] [client xx.xxx.xxx.xx]
Could not DELETE /davhome/show.txt due to a failed precondition 
(e.g. locks).  [500, #0]
[Sat May 19 13:20:53 2007] [error] [client xx.xxx.xxx.xx]
The locks could not be queried for verification against a possible 
"If:" header.  [500, #0]
[Sat May 19 13:20:53 2007] [error] [client xx.xxx.xxx.xx]
Could not open the lock database.  [500, #400]
[Sat May 19 13:20:53 2007] [error] [client xx.xxx.xxx.xx]
(13)Permission denied: Could not open property database.  [500, #1]

Then..

$ sudo touch /var/lock/apache2/DAVLock
$ sudo chown www-data /var/lock/apache2/DAVLock

NW setting of Ubuntu on VMPlayer

2007-06-05T19:33:00.000+02:00

This is small note of how to set network setting of "vmx" for Ubuntu as it didn't work at the original one.

#ethernet0.virtualDev = "vmxnet" <- Comment this line as it doesn't recognize device.
ethernet0.virtualDev = "e1000"

Then

#vim /etc/network/interface
auto eth0
iface eth0 inet dhcp

Commons Digester Variable

2007-05-17T00:43:00.000+02:00

The variable in xml data can be converted with Digester with the easy following codes.

Digester digester = DigesterLoader.createDigester(getURL(ruleFile));
       Map vars = new HashMap();
       vars.put("hello","Czesc!");
       MultiVariableExpander expander = new MultiVariableExpander();
       expander.addSource("$", vars);
       Substitutor substitutor = new VariableSubstitutor(expander);
       digester.setSubstitutor(substitutor);

Commons Lang toString()

2007-05-15T22:31:00.000+02:00

Jakarta Commons Lang support the reflection for toString() which need to synchronize with the changes made for the object model.

public String toString(){
   return ReflectionToStringBuilder.toString(this);
}

For the customization of the output,

public String toString(){
   return ReflectionToStringBuilder.toString(this,ToStringStyle.MULTI_LINE_STYLE)
               .append("lastName",lastName).append("firstName",firstName).toString();
}

Encoding to 3gp file for mobile phones

2007-05-13T01:16:00.000+02:00

If h/s support AAC.

#ffmpeg -i infile.mpeg -vcodec mpeg4 -r 15 -b 128k -s qcif -acodec aac -ar 8000
-ac 1 -ab 13 -f 3gp -y output.3gp

If not

ffmpeg -i infile.mpeg -vcodec mpeg4 -r 15 -b 128k -s qcif -acodec amr_nb -ar 8000
-ac 1 -ab 13 -f 3gp -y output.3gp

For video editing on Linux, LiVES would be very nice.

Tomcat JkShmFile

2007-03-19T23:33:00.000+01:00

Under the default config, you might get error when you boot up the tomcat saying,

jk_child_init::mod_jk.c (2317): Attachning shm:/etc/apache2/logs/jk-runtime-status errno=2

Write the following in /etc/apache2/mod-available/jk.load
JkShmFile /var/log/apache2/jk-runtime-status

Beautiful Font

2007-01-05T17:38:00.000+01:00

Download M+font from http://mplus-fonts.sourceforge.jp/mplus-outline-fonts/download/index.html#download

then follow..

% sudo apt-get install fontforge
% tar xvfz mplus-TESTFLIGHT-012.tar.gz
% cd mplus-TESTFLIGHT-012
% sudo cp /usr/share/fonts/truetype/ipa/ipag.ttf .
% sudo fontforge -script m++ipa.pe
% sudo mkdir /usr/share/fonts/truetype/mplus
% sudo mv M*IPAG.ttf /usr/share/fonts/truetype/mplus/.
% sudo fc-cache -f -v /usr/share/fonts/truetype/mplus

Delete old files

2006-12-18T18:00:00.000+01:00

remove.sh

#!/bin/bash
FILE=/xxx/xxx
find ${FILE} -ctime +5 -type f -exec rm -f {} \;

Change the permission.

# chmod +x remove.sh
# crontab -e

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
1 20 * * * root /root/remove.sh

Done.

Debian apt management

2006-11-30T22:55:00.000+01:00

This is the latest package update tool. Unlike netselect-apt, it doesn't use ICMP! which is often blocked now by firewall..

# s...location
# d...release type
# f...file to examin
# e...the number of host try
apt-spy -s nl -d unstable -f ls-lR.gz -e 10

Debian Keymap

2006-11-30T22:36:00.000+01:00

Simple solution to change the keymap on Debian GNU/Linux.

loadkeys /usr/share/keymaps/i386/qwerty/jp106.kmap.gz
cp /usr/share/keymaps/i386/qwerty/jp106.kmap.gz /etc/console/boottime.kmap.gz

HibernateException

2006-11-13T15:19:00.000+01:00


package org.hibernate;

import org.hibernate.exception.NestableRuntimeException;

/**
 * Any exception that occurs inside the persistence layer
 * or JDBC driver. SQLExceptions are always wrapped
 * by instances of JDBCException.
 *
 * @see JDBCException
 * @author Gavin King
 */

public class HibernateException extends NestableRuntimeException {

 public HibernateException(Throwable root) {
  super(root);
 }

 public HibernateException(String string, Throwable root) {
  super(string, root);
 }

 public HibernateException(String s) {
  super(s);
 }
}

Hibernate - Composite key

2006-11-12T20:23:00.000+01:00

For a table with a composite key, you may map multiple properties of the class as identifier properties. The <composite-id>element accepts <key-property> property mappings and <key-many-to-one> mappings as child elements.

<composite-id>
        <key-property name="medicareNumber"/>
        <key-property name="dependent"/>
</composite-id>

Regex

2006-11-06T14:46:00.000+01:00

Small sample to replace the regular expression..
Using Core API

String body = "\n";
String out;
Pattern pattern = Pattern.compile("class=\".*?\"");
Matcher matcher = pattern.matcher(body);
out = matcher.replaceAll("");
System.out.println(out);

Using Jakarta ORO

String body = "\n";
String out;
Perl5Util util = new Perl5Util();
out = util.substitute("s/ class=\".*?\"//g", body);
System.out.println(out);

Gilbert O'Sullivan

2006-10-10T00:23:00.000+02:00

I love the songs of Gilbert O'Sullivan. This is the ones that I like.

Clair

Clair, the moment I met you I swear
I felt as if something somewhere
Had happened to me
Which I couldn't see

And then
The moment I met you again
I knew in my heart we were friends
It had to be so
It couldn't be no

But try as hard as I might do I don't know why
You get to me in a way I can't describe
Words mean so little when you look up and smile
I don't care what people say,
To me you're more than a child
Oh! Clair, Clair

Clair, if ever a moment so rare
Was captured for all to compare
That moment is you
It's all that you do

But why in spite of our age difference do I cry
Each time I leave you I feel I could die
Nothing means more to me than hearing you say
I'm going to marry you
Will you marry me Uncle Ray?
Oh! Clair, Clair

Clair, I've told you before
Don't you dare
Get back into bed
Can't you see that it's late
No you can't have a drink
Oh! all right then but wait just a bit
While I, in an effort to baby sit,
Catch of my breath what there is left of it.
You can be murder at this hour of the day
But in the morning this hour
Will seem a lifetime away
Oh! Clair, Clair

Alone Again

In a little while from now,
If I'm not feeling any less sour
I promised myself to treat myself
And visit a nearby tower,
And climbing to the top,
Will throw myself off
In an effort to make it clear to who
Ever what it's like when your shattered
Left standing in the lurch, at a church
Where people 're saying,
"My God that's tough, she stood him up!
No point in us remaining.
May as well go home."
As I did on my own,
Alone again, naturally

To think that only yesterday,
I was cheerful, bright and gay,
Looking forward to, but who wouldn't do,
The role I was about to play
But as if to knock me down,
Reality came around
And without so much as a mere touch,
Cut me into little pieces
Leaving me to doubt,
All about God and His mercy
For if He really does exist
Why did He desert me
In my hour of need?
I truly am indeed,
Alone again, naturally

It seems to me that
There are more hearts
Broken in the world
That can't be mended
Left unattended
What do we do? What do we do?

(instrumental break)

Now looking back over the years,
And what ever else that appears
I remember I cried when my father died
Never wishing to have cried the tears
And at sixty-five years old,
My mother, God rest her soul,
Couldn't understand, why the only man
She had ever loved had been taken
Leaving her to start with a heart
So badly broken
Despite encouragement from me
No words were ever spoken
And when she passed away
I cried and cried all day
Alone again, naturally
Alone again, naturally

Hot water supply

2006-10-04T00:22:00.000+02:00

Finally we got the repair of the boiler at house. For the last 7days we had no hot water supply at house because of the boiler breakdown. We could enjoy the bath tonight.

Class JarInflater

2006-10-03T01:47:00.000+02:00

This is the general method to read the image data from jar file.
In DoJa programming, there is a size limitation. In order to reduce the main program file size, at the initial launch of the application, we download the resource file. Then jar file would be better in terms of the usage of the network resource especially for mobile phones.


public static Image loadJarImage(int pos,String name){
 DataInputStream in = null;
 JarInflater ji = null;
 MediaImage mi = null;
 Image img = null;
 byte[] b = null;
 try{
  //Read the data from sp
  in = Connector.openDataInputStream("scratchpad:///0;pos=" + pos);
  b = new byte[(int)ji.getSize(name)];
  in.readFully( b );
  ji = new JarInflater(b);
  
  mi = MediaManager.getImage(ji.getInputStream(name));
  mi.use();
  img = mi.getImage();
  ji.close();
  in.close();
 }catch (Exception ex){
  Util.showErr(ex);
 }
 return img;
}

Already 2nd half!!

2006-09-30T00:02:00.000+02:00

Recently my daughter asks me every morning like "Where do we go?" when she is about to leave the house for the kindergarten. I answer "Kindergarten" and she says "Disssnneeland". Then I think about what she said. Ah-humm "Disneyland!".

After several days, I'm forced to make a plan to take them to Disneyland. Now I'm looking for the nice hotel around there in France.

At Command for PDP Context

2006-09-27T19:32:00.000+02:00

If there is no hotspot around while you are out, it's good to use your mobile as modem to connect to internet via your note PC.

Define PDP Context +CGDCONT

at+CGDCONT= < cid > , <PDP_type>, <APN>, <PDP_addr> ,<d_comp>,<h_comp>

at+CGQREQ?

+CGQREQ=?

http://www.phonestar.com.my/s_at_10.html

[RFC 2616] Transfer Codings

2006-09-27T16:12:00.000+02:00

Trouble maker transfer coding:chunked ! Just for ref, putting RFC.

3.6 Transfer Codings

Transfer-coding values are used to indicate an encoding transformation that has been, can be, or may need to be applied to an entity-body in order to ensure "safe transport" through the network. This differs from a content coding in that the transfer-coding is a property of the message, not of the original entity.


       transfer-coding         = "chunked" | transfer-extension
       transfer-extension      = token *( ";" parameter )

Parameters are in the form of attribute/value pairs.


       parameter               = attribute "=" value
       attribute               = token
       value                   = token | quoted-string

All transfer-coding values are case-insensitive. HTTP/1.1 uses transfer-coding values in the TE header field (section 14.39) and in the Transfer-Encoding header field (section 14.41).

Whenever a transfer-coding is applied to a message-body, the set of transfer-codings MUST include "chunked", unless the message is terminated by closing the connection. When the "chunked" transfer- coding is used, it MUST be the last transfer-coding applied to the message-body. The "chunked" transfer-coding MUST NOT be applied more than once to a message-body. These rules allow the recipient to determine the transfer-length of the message (section 4.4).

Transfer-codings are analogous to the Content-Transfer-Encoding values of MIME [7], which were designed to enable safe transport of binary data over a 7-bit transport service. However, safe transport has a different focus for an 8bit-clean transfer protocol. In HTTP, the only unsafe characteristic of message-bodies is the difficulty in determining the exact body length (section 7.2.2), or the desire to encrypt data over a shared transport.

The Internet Assigned Numbers Authority (IANA) acts as a registry for transfer-coding value tokens. Initially, the registry contains the following tokens: "chunked" (section 3.6.1), "identity" (section 3.6.2), "gzip" (section 3.5), "compress" (section 3.5), and "deflate" (section 3.5).

New transfer-coding value tokens SHOULD be registered in the same way as new content-coding value tokens (section 3.5).

A server which receives an entity-body with a transfer-coding it does not understand SHOULD return 501 (Unimplemented), and close the connection. A server MUST NOT send transfer-codings to an HTTP/1.0 client.

3.6.1 Chunked Transfer Coding

The chunked encoding modifies the body of a message in order to transfer it as a series of chunks, each with its own size indicator, followed by an OPTIONAL trailer containing entity-header fields. This allows dynamically produced content to be transferred along with the information necessary for the recipient to verify that it has received the full message.


       Chunked-Body   = *chunk
                        last-chunk
                        trailer
                        CRLF

       chunk          = chunk-size [ chunk-extension ] CRLF
                        chunk-data CRLF
       chunk-size     = 1*HEX
       last-chunk     = 1*("0") [ chunk-extension ] CRLF

       chunk-extension= *( ";" chunk-ext-name [ "=" chunk-ext-val ] )
       chunk-ext-name = token
       chunk-ext-val  = token | quoted-string
       chunk-data     = chunk-size(OCTET)
       trailer        = *(entity-header CRLF)

The chunk-size field is a string of hex digits indicating the size of the chunk. The chunked encoding is ended by any chunk whose size is zero, followed by the trailer, which is terminated by an empty line.

The trailer allows the sender to include additional HTTP header fields at the end of the message. The Trailer header field can be used to indicate which header fields are included in a trailer (see section 14.40).

A server using chunked transfer-coding in a response MUST NOT use the trailer for any header fields unless at least one of the following is true:

a)the request included a TE header field that indicates "trailers" is acceptable in the transfer-coding of the response, as described in section 14.39; or,

b)the server is the origin server for the response, the trailer fields consist entirely of optional metadata, and the recipient could use the message (in a manner acceptable to the origin server) without receiving this metadata. In other words, the origin server is willing to accept the possibility that the trailer fields might be silently discarded along the path to the client.

This requirement prevents an interoperability failure when the message is being received by an HTTP/1.1 (or later) proxy and forwarded to an HTTP/1.0 recipient. It avoids a situation where compliance with the protocol would have necessitated a possibly infinite buffer on the proxy.

An example process for decoding a Chunked-Body is presented in appendix 19.4.6.

All HTTP/1.1 applications MUST be able to receive and decode the "chunked" transfer-coding, and MUST ignore chunk-extension extensions they do not understand.

Quick Sort in Java

2006-09-26T00:40:00.000+02:00

I developed small application and used sort algorythm. Here is the good performance quick sort Java sample.


    public static DTO[] sort(DTO _dto[],int left,int right){
        //Quick Sort
        int key;
        if(left<right){
            key = _dto[(left+right)/2].getDateValue();
            int i=left -1;
            int j=right +1;
            while(true){
                while(_dto[++i].getDateValue()                while(_dto[--j].getDateValue()>key);
                if(i>=j)break;
                DTO t = _dto[i];
                _dto[i]=_dto[j];
                _dto[j] =t;
               
            }
            sort(_dto, left, i-1);
            sort(_dto, j+1, right);
        }
       
       
        /*Bubble Sort
        for(int i=0;i<_dto.length-1;i++){
            for(int j=_dto.length-1;j>i;j--){
                if(_dto[j].getDateValue()>_dto[j-1].getDateValue()){
                      DietDTO t=_dto[j];
                      _dto[j]=_dto[j-1];
                      _dto[j-1]=t;
                }
                     
            }
           
        }
        */

        return _dto;
    }

int <=> byte[]

2006-09-12T14:08:00.000+02:00

In some occation such as the low level processing in the Java programming, you might need to convert the "int" data into "byte array" and the opposite case as well.

Here is the sample code ( in my case for CLDC1.0 or 1.1 programming).

Converting the int data type into byte array.


     /**
     * In order to conver the int data type into byte array
     * @param value the int value you want to convert
     * @return byte array data
     */
    public static byte[] getIntBytes(int value) {
        byte[] b = new byte[4];
        b[0] = (byte) ((value >>> 24) & 0x000000FF);
        b[1] = (byte) ((value >>> 16) & 0x000000FF);
        b[2] = (byte) ((value >>> 8) & 0x000000FF);
        b[3] = (byte) (value & 0x000000FF);
        return b;
    }

Converting the byte array into int data type


    /**
     * In order to convert the byte array into int data type
     * @param value the byte array you want to convert
     * @return int data
     */
    public static int getInt(byte value[]) {
        int ret = 0;
        ByteArrayInputStream bais = null;
        try {
            bais = new ByteArrayInputStream(value);
            ret = new DataInputStream(bais).readInt();
            bais.close();
            bais = null;
        } catch (Throwable t) {
            t.printStackTrace();
        } finally {
            if (bais != null) {
   
                try {
                    bais.close();
                    bais = null;
                } catch (Throwable t) {
                }
            }
        }
        return ret;
   
    }

Pareto chart

2006-09-11T14:06:00.000+02:00

A Pareto chart is a special type of bar chart where the values being plotted are arranged in descending order. It is named for Vilfredo Pareto, and its use in quality assurance was popularized by Joseph M. Juran and Kaoru Ishikawa.
Simple example of a Pareto chart using hypothetical data showing the relative frequency of reasons for arriving late at work.
Enlarge
Simple example of a Pareto chart using hypothetical data showing the relative frequency of reasons for arriving late at work.

The Pareto chart is one of the seven basic tools of quality control, which include the histogram, Pareto chart, check sheet, control chart, cause-and-effect diagram, flowchart, and scatter diagram. See Quality Management Glossary.

Typically the left vertical axis is frequency of occurrence, but it can alternatively represent cost or other important unit of measure. The right vertical axis is the cumulative percentage of the total number of occurrences, total cost, or total of the particular unit of measure. The purpose is to highlight the most important among a (typically large) set of factors. In quality control, the Pareto chart often represents the most common sources of defects, the highest occurring type of defect, or the most frequent reasons for customer complaints, etc.
(Reference WiKipedia)

Cause & Effect Diagrams

2006-09-11T11:29:00.000+02:00

The cause & effect diagram is the brainchild of Kaoru Ishikawa, who pioneered quality management processes in the Kawasaki shipyards, and in the process became one of the founding fathers of modern management. The cause and effect diagram is used to explore all the potential or real causes (or inputs) that result in a single effect (or output). Causes are arranged according to their level of importance or detail, resulting in a depiction of relationships and hierarchy of events. This can help you search for root causes, identify areas where there may be problems, and compare the relative importance of different causes.

If the influence level of the factor is quantitatively Pareto chart.

Small Giant Step

2006-09-11T01:08:00.000+02:00

This month is her first Debut for social community. Now she goes to British pre-school. So far she really enjoy the time at the kindergarten.

It's a small step but giant step for her future!!

Java :: Leap Year

2006-09-08T01:34:00.000+02:00

Yes. I recovered all the photos of memory from the S/W crashed HD. I install picasa2 from google and look around the ones taken for 5 years.

Time flies. Here is the photo 1 year ago @ Italy where the family of my sister in law lives.

Good memories of pizza , mozzarella and flash back ;-)

These days I'm bussy @ work and not many time for the dev @ home. Also looking for the good server host to rent the space for the Ajax server side appli. Anyway I don't have nether time nor money ;-( Need to wait for the next month...

The formula of calculating the leap year is very simple but easy to forget. Just for a note.


/**
* This is the method to check the leap year
* @param year the year you want to check if the leap year
* @return true:leap year  false: not the leap year
*/
public static boolean isLeapYear(int year){
boolean result = false;
if ((year % 4 == 0 && year % 100 != 0)  (year % 400 == 0)) {
 result = true;
}
return result;
}

Vacation @ Poland

2006-09-05T01:28:00.000+02:00

Just before the vacation to Poland, my GNU/Linux PC @ Home crashed because of the mis-configuration of some xorg etc... I bought Acronis Disk Director Suite to recover some of the data stored in the HD. The application was on promotion (25 euro) and very well that I could recover the data of photos for 6 years. ( My wife would kill me if I couldn't get it back ;-0) I immediately made the buckup to DVD which I bought a month ago. Now I know how important it is to make a backup regularlly.

The vacation was so busy that we couldn't really relax at all. Everyday meeting the relatives and friends of my wife. But kids seems to be very happy that the sister in law and her bf played with them a lot. There we did a lot of shopping as well. We spent the amount of 2 month salary.

This is the snapshot @ hotel in Berlin on our way back home.

Summer vacation

2006-08-21T02:28:00.000+02:00

Our summer vacation is comming soon and I spent a whole weekend to find accomodations as we make our travel plan by ourselves for this time. How easy to use travel agency to find a vacation plan... Still I need to make reservation 2 nights in Germany & Poland.

By the way, I somehow find the way to customize blogger and google map. I put some functions to this blog to see if everything is all right. How cool that blogger can customize the design of the blog. Free (as a free speach) is good that I can enjoy ;-) Finally I could put a bit of Ajax taste in my blog with the big help of google ;-)

BTW, the kernel 2.6.17.9 is released on 18th Aug. Aren't they on vacation ?

Vim setting for .vimrc

2006-08-17T11:08:00.000+02:00

Vim is the very powerful text editor for GNU/Linux. Here is the sample of the .vimrc which confortably set up your vim.

" .vimrc
" Clear any existing autocommands:
autocmd!

" *** User Interface
" use indents of 4 spaces, and have them copied down lines:
set shiftwidth=4
set tabstop=4
set shiftround
set expandtab
set autoindent

" Set for visible tab
"set listchars=tab:>-,extends:<,trail:-,eol:<
set listchars=tab:>-
set list

" The format of status line
set statusline=%<%f\ %m%r%h%w%{'['.(&fenc!=''?&fenc:&enc).']['.&ff.']'}%=%l,%c%V%8P

" No beep
" set vb t_vb=
set visualbell

" No auto NL
set formatoptions=q

" Show line number
set number

" have syntax highlighting in terminals which can display colours:
if has('syntax') &amp;amp;amp;amp;& (&t_Co > 2)
syntax on
endif

" have fifty lines of command-line (etc) history:
set history=50

" display the current mode and partially-typed commands in the status line:
set showmode
set showcmd

" have the mouse enabled all the time:
set mouse=a

" don't have files trying to override this .vimrc:
set nomodeline

" Set the type of background color
set background=dark

" *** Text Formatting -- Specific File Formats
" enable filetype detection:
filetype on

" for C-like programming, have automatic indentation:
autocmd FileType c,cpp,slang set cindent

" for actual Java C (not C++) programming where comments have explicit end
" characters, if starting a new line in the middle of a comment automatically
" insert the comment leader characters:
autocmd FileType c,java set formatoptions+=ro smartindent noexpandtab tabstop=4

" for Perl programming, have things in braces indenting themselves:
autocmd FileType perl set smartindent

" for CSS, also have things in braces indented:
autocmd FileType css set smartindent

" for HTML, generally format text, but if a long line has been created leave it
" alone when editing:
autocmd FileType html set formatoptions+=tl

" for both CSS and HTML, use genuine tab characters for indentation, to make
" files a few bytes smaller:
autocmd FileType html,css set noexpandtab tabstop=4

" in makefiles, don't expand tabs to spaces, since actual tab characters are
" needed, and have indentation at 4 chars to be sure that all indents are tabs
" (despite the mappings later):
autocmd FileType make set noexpandtab shiftwidth=4

" *** Search & Replace
" make searches case-insensitive, unless they contain upper-case letters:
set ignorecase
set smartcase
set hlsearch

" show the `best match so far' as search strings are typed:
set incsearch

Shell Backup Script

2006-08-16T20:28:00.000+02:00

Here is the shell script for backup of the server contents to another over scp.

#!/bin/sh
#################################################################
# Script for the backup the contents under the specified folder
# and the all mysql data
#
# -Cavalierski
#################################################################
# The Following setting should be modified for the each environment
##################################################################
#Date format of the back up file. This will be the prefix of the file
DATE_FORMAT=$(date +'%Y%m%d')

#Specify the folder that you want to backup
TARGET_DIR=(/var/www/xxx /home/xxx/test)

#Set the backup file name
BACKUP_LOGFILE=${DATE_FORMAT}.log
BACKUP_SQLFILE=${DATE_FORMAT}.sql.gz

#Setting for MySQL
MYSQL_PASSWD=

#Setting for Backup server over scp
SCPURL=www.loveanna.net:backup
SCPUSER=xxx

# Do not edit the below lines
##################################################################
# Temporary backup file
BACKUP_DIR=/tmp/www
function make_backup(){
for f in "$@"
do
if [ -d "$f" ]
then
  tar zcvf ${BACKUP_DIR}/${DATE_FORMAT}_${f##/*/}.tar.gz "$f"/* >>
 ${BACKUP_DIR}/${BACKUP_LOGFILE}
else
  echo "[ERROR] $f doesn't exist" >> ${BACKUP_DIR}/${BACKUP_LOGFILE}
fi
done

#The Answer to Life, the Universe, and Everything
return 42;
}

mkdir -p $BACKUP_DIR
make_backup ${TARGET_DIR[*]}
mysqldump -uroot --password=$MYSQL_PASSWD --all-databases | gzip>  
 $BACKUP_DIR/$BACKUP_SQLFILE

if [ $?  -ne 0 ]
then
echo "[ERROR] sqldump failed" > ${BACKUP_DIR}/${BACKUP_LOGFILE}
fi

BKFILES=$(ls $BACKUP_DIR/${DATE_FORMAT}*)
BKNUM=${#BKFILES[@]}

for ((i=0;i<BKNUM;i++)); do
scp ${BKFILES[i]} ${SCPUSER}@${SCPURL}
rm -R ${BKFILES[i]:-${BACKUP_DIR}/*}
done

Useful Eclipse Plug-ins

2006-08-16T20:13:00.000+02:00

Here are the list that I use for Eclipse on Ubuntu.

PMD - Refactoring
CheckStyle- Check code style
HexEditor- Hex view on Eclipse
EclipseUML- UML view on Eclipse

The link to the plug-ins for Eclipse

Firefox flash sound problem

2006-08-09T01:05:00.000+02:00

The following steps are the solution on the problem of firefox flash sound problem.

# Flash also looks for /usr/lib/libesd.so.1
sudo ln -s /usr/lib/libesd.so.0 /usr/lib/libesd.so.1

# Flash expects /tmp/.esd/socket to exist.
sudo mkdir -p /tmp/.esd/
sudo touch /tmp/.esd/socket

Install log script for linux

2006-08-08T23:33:00.000+02:00

Sometimes you need to install the program from the source as it is stable etc. However without the package management , it is difficult to find where the program files are deployed.

The following commands will tell you where the new files are created. Now that you can remove the programm following the diff output. The following each line is in one line.

%sudo find / | grep -v -e ^/proc/ -e ^/dev/ -e ^/media/ -e ^/tmp/ -e ^/mnt/ >beforeinstall.list

% sudo find / | grep -v -e ^/proc/ -e ^/dev/ -e ^/media/ -e ^/tmp/ -e ^/mnt/ >afterinstall.list

% diff beforeinstall.list afterinstall.list

Mastering dpkg

2006-08-08T23:21:00.000+02:00

Debian GNU/Linux package manager is very cozy tool to manage applications on your system.
Here are the tips of useful commands of "dpkg".

// Search the package
$dpkg -l 'firefox*'

//Search installed package
$dpkg -l | grep firerox

//List up the files install by the package
$dpkg -L firefox

//Search the package from the specific file
$dpkg -S mozilla-firefox.png

//Aquire the complete information of the package
$dpkg -s firefox

Those commands are often needed but often forgotten...

Blog is Up

2006-07-05T01:42:00.000+02:00

OK, now it's open.

So far I use Ubuntu Dapper as a desktop OS at home & work and Eclipse as an IDE. At work, I use J2ME and at home I use J2SE / J2EE for my hobby.

Recently I've been enjoying the re-config of my Ubuntu but I'm getting in the mood of programming now. I just become a member of SorceForge so I'm looking for the project that I can help.

With 3 ladies (2 cute daughters & 1 wife) , it is difficult to find time for my hobby. After 23:00-2:00 for 3 hours a day is the precious time for me. Still it's much less than I need.

Anyway, in this blog, I'll put notes or tips that I learned. Hope you could find them useful.