<s:iterator value="books" status="rowstatus">
<s:url id="url" value="%{bookImagePath[#rowstatus.index]}"/>
<img src="${url}" alt="Book image" align="top"/>
</iterator>
Make It Open
The Answer to Life, the Universe, and Everything
Wednesday, January 21, 2009
Struts2: <img src="${url}"/>
In case of specifying the url for the image in struts2, you can write as follows.
Thursday, January 08, 2009
ERROR JDBCExceptionReporter - Duplicate entry
By using mysql, I faced the followin error and here is the solution
Close the session after transaction.commit().
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
I faced the following error and here is the solution.
Comment the wait_timeout such as below.
** 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
Tuesday, January 06, 2009
SocketException: Too many open files
If you see the following error,
Try to change the max open file value for the user
as well as the OS
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
--
Tuesday, December 23, 2008
SQL Error: 0, SQLState: 08S01
If you see the such a error by using hibernate3, you need the following to avoid it.
In hibernate.cfg.xml, write
Then create "c3p0.properties" in your root classpath folder and write
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
Wednesday, December 10, 2008
Illegal mix of collations in MySQL
In case for having such a error in mysql using Hibernate or so.
Add the following in my.cnf
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
Monday, November 17, 2008
Apache2.2 : AuthUserFile Error
<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
Friday, November 14, 2008
JBoss Setting
After the installation of JBoss, here is the know-how of its setting.
1) Heap size
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
3) Transaction time out
300
=>
150
4) Thread number
maxThreads="250"
=>
maxThreads="200"
5) Log Output level by log4j
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
=>
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>
Thursday, November 13, 2008
Struts2 and Hibernate v3 Min. Lib.
Those are the minimum required libraries for Struts2 and Hibernate v3.
Struts2
JBoss
Struts2
-commons-logging
-freemaker
-ognl
-struts2-core
-xwork
JBoss
-hibernate3
-antlr
-comons-collection
-dom4j
-javassist
-jta
-slf4j-api
Monday, August 18, 2008
Log4J Log rotate
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.
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>
Saturday, June 07, 2008
File code converting
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 {} \;
Tuesday, May 27, 2008
Flv file convert
Flv file convert to music format
.flv to mp3
.flv to aac
.flv to mp4
To cut mp3 then
.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
Wednesday, May 21, 2008
Awstats for Ubuntu
awstats is log analyzer I use it for tomcat log analysis.
Setting for awstats
Then access to :http://hostname/cgi-bin/awstats.pl?config=hostname
Edit cron
<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
Wednesday, May 14, 2008
Firefox3 Plugins
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.
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 ;-)
Thursday, March 06, 2008
Change the folder name in English
Change the default folder such as Music/Document etc. name in English.
LANG=C xdg-user-dirs-gtk-update
Monday, February 25, 2008
zshrc
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
Saturday, February 09, 2008
Ubuntu Gutsy Step1
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
1) I suggest to visit here for your little preparation
http://easylinux.info/wiki/Ubuntu:Gutsy
2) Font installation
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.
5) java capability
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
Friday, January 11, 2008
MySQL5 character set
All you need to edit my.cnf in order not to write the command like "set name xxx" everytime you restart the service.
In order to check the charset
[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/ |
+--------------------------+----------------------------+
Sunday, December 09, 2007
Maven2 deploy to other server
Create file settings.xml under .m2
Then add the following to pom.xml
<?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
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>
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