The Royal Nick Humphrey IT Blog, Home Edition

jboss jsf login example catalina container managed security j_security_check web.xml login-config auth-method form

2012-02-27T17:59:00.002+01:00

some relevant code from web.xml:

<security-constraint>
<display-name>Web Security</display-name>
<web-resource-collection>
<web-resource-name>rich</web-resource-name>
<url-pattern>/pages/*</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>Users</role-name>
<role-name>Administrators</role-name>
</auth-constraint>
</security-constraint>
<security-constraint>
<display-name>Admin Web Security</display-name>
<web-resource-collection>
<web-resource-name>rich_admin</web-resource-name>
<url-pattern>/adm/*</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>Administrators</role-name>
</auth-constraint>
</security-constraint>
<login-config>
<auth-method>FORM</auth-method>
<realm-name>myrealmLdapAuthenticator</realm-name>
<form-login-config>
<form-login-page>/login.jsf</form-login-page>
<form-error-page>/login.jsf</form-error-page>
</form-login-config>
</login-config>
<security-role>
<role-name>Users</role-name>
</security-role>
<security-role>
<role-name>Administrators</role-name>
</security-role>

the security-role role-names are defined in our LDAP server.

the most relevant line from LoginBean.java:

FacesContext.getCurrentInstance().getExternalContext().redirect("/pages/j_security_check?j_username="+username+"&j_password="+password);

this is done when backend authentication, plus anything you need to check/set before you welcome the user into the application, is complete. note that LoginBean.java is declared with request scope in faces-config.xml and the class itself has the annotation @org.ajax4jsf.model.KeepAlive
this redirect should be run on a server using https because it is a GET request.

and some code from login.xhtml:

<h:messages showDetail="false" showSummary="true" layout="list" styleClass="rich-messages-label" />

<h:form id="checkPassword">
<h:panelGrid columns="2">
<h:outputLabel for="username" value="#{loginBean.getPropertyValue('label.username')}" />
<h:inputText required="true" id="username" value="#{loginBean.username}" />
<h:outputLabel for="password" value="#{loginBean.getPropertyValue('label.password')}" />
<h:inputSecret required="true" id="password" value="#{loginBean.password}" />
</h:panelGrid>
<h:commandButton value="#{loginBean.getPropertyValue('label.login')}" action="#{loginBean.login}" disabled="#{loginBean.mustChangePassword}" reRender="checkPassword,authenticate" />
</h:form>

<h:form id="authenticate" rendered="#{loginBean.mustChangePassword}">
<h:panelGrid columns="2">
<h:outputLabel for="currentpassword" value="#{loginBean.getPropertyValue('label.passwordCurrent')}" />
<h:inputSecret required="true" id="currentpassword" value="#{loginBean.password}" />
<h:outputLabel for="newpassword" value="#{loginBean.getPropertyValue('label.passwordNew')}" />
<h:inputSecret required="true" id="newpassword" value="#{loginBean.newPassword}" />
<h:outputLabel for="confirmnewpassword" value="#{loginBean.getPropertyValue('label.passwordConfirmNew')}" />
<h:inputSecret required="true" id="confirmnewpassword" value="#{loginBean.confirmNewPassword}" />
</h:panelGrid>
<h:commandButton value="#{loginBean.getPropertyValue('label.save')}" action="#{loginBean.authenticate}" />
</h:form>

what's the difference between oracle's expdp full database backup (full=y) and not full (default)

2012-02-25T16:08:00.001+01:00

e.g. if you are using scott, a non-full dump/export will only dump scott's tables. a full backup will dump scott's tables, but also system tables, etc.

-rw-r----- 1 oracle oinstall 318050304 2012-02-24 09:44 full_11g.dmp
-rw-r----- 1 oracle oinstall 260571136 2012-02-24 09:53 not_full_11g.dmp

how to change oracle table tablespace and rebuild unusable indexes

2012-02-22T10:49:00.002+01:00

after installing oracle 11g on ubuntu 11.10, importing (using impdp) from an oracle 10g database, i noticed that some of the tables were in the SYSTEM tablespace instead of the USER tablespace so i wanted to move them all to the same tablespace. you do it in 2 parts, first move, then rebuild indexes. here's how i did it:

* log in as sys:

su - oraclecd /u01/app/oracle/product/11.1.0/db_1/bin./sqlplus sys as sysdba

* now, to find out which tables were in the SYSTEM tablespace:

select table_name from dba_tables where owner = 'SCOTT' and tablespace_name = 'SYSTEM';

let's say the query returns:

TABLEXTABLEYTABLEZ

* and to find their index names:

select index_name from dba_indexes where STATUS='UNUSABLE';

(this will technically give you all the unusable index names, or you can narrow your search to the 3 tables above if you like, by modifying the where clause, but why wouldn't you want to see if there were additional unusable indexes? =))

let's say the query returns:

PK_TABLEXPK_TABLEYPK_TABLEZ

(in my table i had all kinds of different looking index names, e.g.: SYS_C0014766, TABLEX_PK, IX_HTTPMSGFM_MEMBER_LDAP_ID, AGREEMENTNO_UNIQUE, etc -- who the hell named these so inconsistently?)

* move them to USER tablespace, then rebuild the unusable index:

alter table SCOTT.TABLEX move tablespace USERS;alter index SCOTT.TABLEX rebuild tablespace USERS;
alter table SCOTT.TABLEY move tablespace USERS;alter index SCOTT.TABLEY rebuild tablespace USERS;
alter table SCOTT.TABLEZ move tablespace USERS;alter index SCOTT.TABLEZ rebuild tablespace USERS;

sources:
http://www.dba-oracle.com/t_alter_table_move_index_constraint.htm
http://www.databasejournal.com/features/oracle/article.php/3735286/Oracle-Unusable-Indexes.htm

how to give oracle user home directory and bash history

2012-02-22T10:15:00.001+01:00

after installing oracle 11g on ubuntu 11.10, i'm left with an oracle user that doesnt have a home and who forgets all his command line history. to fix this:
* as a normal user (not oracle) with sudo privileges:

sudo mkdir /home/oracle
sudo chown oracle:oinstall /home/oracle
su - oracle
touch .bash_history

workaround for oracle impdp ORA-39014 ORA-39029 ORA-31672 prematurely exited/terminated

2012-02-21T15:37:00.004+01:00

i've been trying for the last 24 hours to import a dump/dmp file created with expdp in oracle 10g on ubuntu 8 into a new server on ubuntu 11.10 with oracle 11g enterprise, using this import statement:

oracle@mydbserver:/u01/app/oracle/product/11.1.0/db_1/bin$ ./impdp scott@MYDB PARFILE=/home/me/Downloads/params.txt

but it would run for a little while then throw this error:

ORA-39014: One or more workers have prematurely exited.
ORA-39029: worker 1 with process name "DW01" prematurely terminated
ORA-31672: Worker process DW01 died unexpectedly.

when i increased the PARALLEL number (e.g. to 4) it got past a place it was stuck at, and got somewhat further.

params.txt looks like this:

DIRECTORY=data_pump_dir
DUMPFILE=expdat_scott_20120216.dmp
PARALLEL=4
TABLE_EXISTS_ACTION=REPLACE

another workaround is to import tables one by one using the INCLUDE parameter, so e.g. add this line to the param file (i.e. params.txt):

INCLUDE=TABLE:"IN ('TABLE1')"

then simply rerun the impdp command (while in the bin directory):

./impdp scott@MYDB PARFILE=/home/me/Downloads/params.txt

if somehow you know there is a particular table that is causing trouble you can use the EXCLUDE parameter instead and simply exclude that one table:

EXCLUDE=TABLE:"IN ('MY_CORRUPT_TABLE1')"

our dmp file was made while the database was running and thus one of the tables got corrupted, or was exported in the middle of a process so that's why we had problems importing it into the new database. i found this out by doing this:

cat /u01/app/oracle/admin/mydb/dpdump/import.log

which showed me the name of the import job i was running:

SCOTT.SYS_IMPORT_FULL_01

so i ran this:

./impdp ATTACH=SCOTT.SYS_IMPORT_FULL_01

and it showed me which table was the last table to be attempted imported:

Worker 1 Status:
Process Name: DW01
State: UNDEFINED
Object Schema: SCOTT
Object Name: MY_CORRUPT_TABLE1
Object Type: SCHEMA_EXPORT/TABLE/TABLE_DATA
Completed Objects: 4

so i knew i should exclude that table in the import.

sources:
https://forums.oracle.com/forums/thread.jspa?threadID=907984 (thanks to user https://forums.oracle.com/forums/profile.jspa?userID=696918 )

p.s. in some previous desperate attempts to get things to work (prior to the instructions above), i also ran the following as sys:

alter system set open_cursors=1024 scope=spfile;
alter system set "_optimizer_cost_based_transformation"=off;
commit;

i cant say for sure whether this was necessary or not. i'm sorry, i know, that sucks, but if the above fails then consider running these alter statements, then trying again.

where is the default oracle impdp log file location?

2012-02-21T11:38:00.000+01:00

in my oracle 11g installation on ubuntu 11.10 it is:
/u01/app/oracle/admin/mydatabase/dpdump/import.log

i found this folder by running this query:

SELECT directory_path FROM dba_directories WHERE directory_name = 'DATA_PUMP_DIR';

how to exclude multiple files when importing with impdp for oracle xe

2012-02-20T17:55:00.002+01:00

su oracle
cd /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin
nano -w params.txt

give it the following content, e.g.:

DIRECTORY=data_pump_dir
DUMPFILE=my_expdat.dmp
EXCLUDE=TABLE:"IN ('TABLE1,TABLE2')"
TABLE_EXISTS_ACTION=REPLACE

save it, then run impdp like this:

./impdp system@MYDATABASE PARFILE=params.txt

source: http://www.orafaq.com/forum/t/174436/0/

sox FAIL formats: no handler for file extension `mp3'

2012-02-18T17:37:00.003+01:00

if you're trying to work with mp3 files and sox wont play, run this in a terminal:
sudo apt-get install libsox-fmt-mp3

how to quickly get the most updated (svn) version of hydrogen for ubuntu 11.10

2012-02-18T12:32:00.003+01:00

i've noticed a couple of bugs in hydrogen 0.9.5:
* metronome indiscriminately turning on/off during playback and export
* incorrect error message when exporting, that it failed when it didnt fail

there might be more bugs, but the 2 bugs above have at least been fixed. to get the latest and most up-to-date version of hydrogen do this in a terminal:
sudo add-apt-repository ppa:kxstudio-team/hydrogen
sudo apt-get update
sudo apt-get install hydrogen-svn

ref:
http://www.hydrogen-music.org/hcms/node/1917
http://hydrogen.popez.org/hcms/node/1868
https://launchpad.net/~kxstudio-team/+archive/hydrogen/

how to install raid on ubuntu 11.10

2012-02-17T14:04:00.001+01:00

*you need the server edition*--the normal desktop version doesnt have raid options in the manual partitioning interface.

then follow this:
https://help.ubuntu.com/community/Installation/SoftwareRAID

then after choose "configure software raid"

how to backup the oracle 10 database using expdp

2012-02-16T14:14:00.003+01:00

to backup the database using expdp:
cd ~/path/to/oracle/product/10.2.0/db_1/bin
./sqlplus "sys/any as sysdba"
SQL> startup;
SQL> exit;
./lsnrctl start
./sqlplus "sys/any as sysdba"

if you already havent done so:
SQL> grant read, write on directory DATA_PUMP_DIR to scott;

now run:

SQL> host

$ ./expdp scott/mypassword DIRECTORY=DATA_PUMP_DIR DUMPFILE=expdat_scott.dmp

the backup dmp file will be here:
/path/to/oracle/product/10.2.0/db_1/rdbms/log/

which is the default value/location for DATA_PUMP_DIR

you can double check it in sqlplus like this:
SQL> SELECT directory_path FROM dba_directories WHERE directory_name = 'DATA_PUMP_DIR';

source: http://www.orafaq.com/wiki/Datapump

how to delete oracle 10 archive log redo files

2012-02-16T14:07:00.005+01:00

when trying to connect to my database i got this error:
oracle: ORA-00257: archiver error. Connect internal only, until freed.

source: http://www.dba-oracle.com/sf_ora_00257_archiver_error_connect_internal_only_until_freed.htm

to double check the archivelog redo space:
cd ~/path/to/oracle/product/10.2.0/db_1/bin
./sqlplus "sys/any as sysdba"
SQL> archive log list;
SQL> show parameter db_recovery_file_dest;
SQL> SELECT * FROM V$RECOVERY_FILE_DEST;

source: https://forums.oracle.com/forums/thread.jspa?threadID=519282

in another terminal:
cd ~/path/to/oracle/product/10.2.0/db_1/bin
./rman target / nocatalog

RMAN > delete archivelog all;

source: http://oracle-abc.wikidot.com/cold-backup-with-rman

it seemed as if things werent quite deleted so i ran this:
RMAN > run {
allocate channel t1 type disk;
backup archivelog all delete input format '/home/oracle/arch_NaVu_%s';
release channel t1;
}

source: http://www.shutdownabort.com/errors/ORA-19809.php

samsung galaxy gio GT-S5660 mobile cell phone android 2.3.3 how to transfer call / set someone over

2012-02-08T10:34:00.001+01:00

when you get a call you want to set over to someone else's telephone (transfer) push the "keypad" button, then type:
**the_new_number#

e.g. to transfer the incoming call to 22 22 22 22, type:
**22222222#

ubuntu 11.10 configure multiple desktops, laptop to external monitor with hdmi cable

2012-02-06T08:57:00.001+01:00

in ubuntu 11.10 unity, in order to connect my laptop to an LG flatron L246WH monitor that i've rotated to the left so it stands tall, on its side, you have to first enable ubuntu's fglrx driver using jockey-gtk. then open system settings > displays, then select the goldstar company ltd 24" monitor and choose rotation: clockwise. (note: these settings get saved in ~/.config/monitors.xml)

then every time you switch between single and dual desktop mode you have to (at least when switching back to dual mode) go into displays again and set it up.

to automate this process, i made a script i use in a terminal to quickly and easily switch between single and dual desktop mode, called xto:
http://ideone.com/AhmWC

put the script here:
~/

make sure you set it to executable:

chmod +x ~/xto

to set system to dual mode:

cd./xto -m

to set system to single desktop mode:

cd./xto -s

below are the configuration files for single and desktop modes that the script copies to set things up, depending on the command line arg you send to xto.

xorg.single.conf: http://ideone.com/CkIB2
xorg.dual.conf: http://ideone.com/sU5XO
monitors.single.conf: http://ideone.com/XFv5l
monitors.dual.conf: http://ideone.com/2tzhF

place these files in ~/Documents

how to make a bent line with arrow head in a dia diagram

2012-01-30T10:56:00.002+01:00

if you want to make an arrow line from element to another, use "polyline":

click on the element you want the line to go *from*:

then click and drag the arrow head over to the element the arrow is going to point *to*. when the element turns red, unclick and it will snap to the element:

right click on the new line and choose "add corner":

you'll now see an orange box. click on it and drag it to where it creates a nice L shape:

ubuntu linux chrome cant click flash popup to allow local storage permission [SOLVED]

2012-01-21T11:14:00.001+01:00

my son was trying to go to ninjago.lego.com, but when the page loaded the adobe flash dialogue popup box was asking for permission to store information locally, but it was impossible to click the allow button. to fix this i right clicked on it and chose "global settings".

then in the "storage" tab
* click "allow sites to save information on this computer"
* click "delete all"

then in the "camera and mic" tab
* click "block all sites from using the camera and microphone"
* click "camera and microphone settings by site" and "remove" all websites

do the same thing in the "playback" tab

then in the "advanced" tab remove all the sites in "trusted location settings"

click "close"

restart chrome

how to install the gedit regex/regexp plugin for unity in ubuntu linux 11.10 oneiric ocelot

2012-01-18T12:21:00.004+01:00

download this file http://live.gnome.org/Gedit/Plugins?action=AttachFile&do=get&target=regex_replace-gedit3.tar.gz

close all instances of gedit

open a terminal/console and move to where you downloaded the file, e.g. /home/myuser/Downloads

cd /home/myuser/Downloads
tar xzvf regex_replace-gedit3.tar.gz
mkdir -p ~/.local/share/gedit/plugins
mv regex_replace ~/.local/share/gedit/plugins

start gedit > edit > preferences > plugins > put a checkmark on "regular expressions"
now when you want to use regular expressions in search and replace you go here: search > regular expressions

source: http://halfhourhacks.blogspot.com/2008/03/gedit-regular-expression-plugin.html

how to import local source code to a new, remote, subversion svn repository from the command line

2012-01-12T11:17:00.004+01:00

i have newly configured jboss 7 web profile for a potential migration we will do from jboss 4. i was asked to commit my entire jboss 7 to subversion so another developer could look at it. here's how i did it, the errors i got during the process and how i overcame them.

on my local machine (where i have the jboss source), log into the remote svn server:
ssh mySshUser@myRemoteSvnServer

(i'm now) on myRemoteSvnServer (ip address: 192.168.1.254), create the new svn repo:
sudo svnadmin create /srv/svn/repos/jboss-as-web-7.0.2.Final

now copy the password file from another svn project (the same people will be allowed to access this jboss project):
sudo cp -f /srv/svn/repos/anotherSvnProject/conf/passwd /srv/svn/repos/jboss-as-web-7.0.2.Final/conf/

otherwise just edit the new repo password file, defining who has access to it, etc.

now make sure the ownership of the new repo is correct:
sudo chown -R www-data:www-data /srv/svn/repos/jboss-as-web-7.0.2.Final

on my local machine, import the jboss source to the new, remote repo you just created:
svn import /path/to/jboss/source/jboss-as-web-7.0.2.Final https://192.168.1.254/svn/jboss-as-web-7.0.2.Final

on myRemoteSvnServer, just to be sure, make sure ownership is correct again:
sudo chown -R www-data:www-data /srv/svn/repos/jboss-as-web-7.0.2.Final

---

along the way i got various errors:

svn: OPTIONS of 'http://192.168.1.254/svn/jboss-as-web-7.0.2.Final': could not connect to server (http://192.168.1.254)
svn: Your commit message was left in a temporary file:
svn: 'svn-commit.tmp'

this was most likely due to the fact that the remote svn server actually runs on https, not http.

svn: Can't open file '/srv/svn/repos/jboss-as-web-7.0.2.Final/db/txn-current-lock': Permission denied
svn: Your commit message was left in a temporary file:
svn: 'svn-commit.2.tmp'

this was most likely due to a permissions/ownership issue, so i ran this on the remote svn server:

sudo chown -R www-data:www-data /srv/svn/repos/jboss-as-web-7.0.2.Final

how to compile and install vestige (vstige) vst plugin for lmms 0.4.12

2012-01-09T19:49:00.003+01:00

in ubuntu 11.10 i couldnt install lmms or lmms-vst because it was complaining about a wine dependency--wine1.2--even though wine1.3 was installed:

lmms : Depends: wine1.2 but it is not going to be installed

E: Unable to correct problems, you have held broken packages

so i had to compile and install lmms from the source code:
http://lmms.sourceforge.net/download.php

basically follow this guide: http://lmms.sourceforge.net/wiki/index.php/Compiling_LMMS

but here's exactly how i had to do it to get it to work, AND get the vestige vst-plugin (libvestige.so) to get installed (because it doesnt get installed by default):
when i tried cmake-ing the project the first time i got the following dependency errors:

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
FREETYPE_LIBRARY (ADVANCED)
linked by target "RemoteZynAddSubFx" in directory /home/nick/binl/lmms-0.4.12/plugins/zynaddsubfx
X11_Xft_LIB (ADVANCED)
linked by target "RemoteZynAddSubFx" in directory /home/nick/binl/lmms-0.4.12/plugins/zynaddsubfx
X11_Xinerama_LIB (ADVANCED)
linked by target "RemoteZynAddSubFx" in directory /home/nick/binl/lmms-0.4.12/plugins/zynaddsubfx
-- Configuring incomplete, errors occurred!

so i had to install some things to make the errors go away:
sudo apt-get install libqt4-dev qt4-dev-tools build-essential libxft-dev libfreetype6-dev libxinerama1 libxinerama-dev

then i got the source code using github:
cd

git clone git://lmms.git.sf.net/gitroot/lmms/lmms
cd lmms
git checkout -b stable-0.4 origin/stable-0.4

then i created the vestige buildfiles (so it would get installed when we run cmake on the whole project):
cd plugins/vestige

cmake .

then i compiled and installed lmms:
cd ../..
mkdir build
cd build
cmake ../
make
sudo make install

now start lmms.
when you run it for the first time you'll need to do some configuration. i set the following:
audio settings > audio interface: ALSA
midi settings > midi interface: ALSA-Sequencer

here are a whole load of awesome, FREE, vst plugins, by DSK Instruments.

thanks to IRC user Gegsite for his help too =)

how to list openldap ldap user info in a terminal or graphical browser gui program on ubuntu linux

2012-01-03T11:42:00.004+01:00

in order to get the userPassword value you need to bind the search to an authenticated user who has access to view that info, e.g. the admin/root user, e.g. here's how you'd do it with a simple bind authentication (instead of e.g. SASL):

ldapsearch -xLLLWD cn=adminUserName,dc=mycompany,dc=com -b ou=People,dc=mycompany,dc=com -s sub uid=userId

userPassword will look like this:
userPassword:: OHBjcWNLNGlQaVF5

to see that hashed value in clear text either use luma or run a command like this:
echo OHBjcWNLNGlQaVF5 | openssl base64 -d

when i ran that it looked like i got no (zero/empty) output, but in fact the next line looked like this:

mySecretPasswordmyUser@myLdapServer:~$

where the clear text password is the bold text here: mySecretPasswordmyUser@myLdapServer:~$

what happened was the output of openssl didnt add a new line.

you can also use perl and you wont get the new line bug:
echo OHBjcWNLNGlQaVF5 | perl -MMIME::Base64 -ne 'print decode_base64($_) . "\n"'

much thanks to user blingme (Buchan Milne) on the freenode #openldap irc channel for the help with figuring out how to show the user password =)

---

on ubuntu you can install a gui program called luma:

sudo apt-get install luma

settings > edit server list
add
new server name, e.g. my local ldap
doubleclick my local ldap in the server list
click network options
hostname: myldapserver
(or use the IP address)
click authentification
remove the checkmark from anonymous bind
bind as: cn=yourAdminUserName,dc=mycompany,dc=com
password: yourAdminUserPassword
save
ok
click browser

in luma you can see the userPassword in clear text. if anyone knows how to print the userPassword in a terminal, let me know ;)

ref. also: http://www.openldap.org/faq/data/cache/1346.html

How to enable remote debugging with Jboss and Eclipse on Ubuntu Linux

2011-12-22T10:25:00.002+01:00

1. enable debugging in run.sh (e.g. /usr/jboss/bin/run.sh )

insert this code:

## uncomment this to enable debugging
JAVA_OPTS="$JAVA_OPTS -Xdebug -Xrunjdwp:transport=dt_socket,address=1044,server=y,suspend=n"

right before this code:

# Display our environment
echo "========================================================================="
echo ""
echo " JBoss Bootstrap Environment"
echo ""
echo " JBOSS_HOME: $JBOSS_HOME"
echo ""
echo " JAVA: $JAVA"
echo ""
echo " JAVA_OPTS: $JAVA_OPTS"
echo ""
echo " CLASSPATH: $JBOSS_CLASSPATH"
echo ""
echo "========================================================================="
echo ""

2. restart jboss

3. make sure jboss is listening on port 1044

on ibmserver, open a terminal window and run this code:

netstat -a|grep 1044

if a line like this turns up then you're ok:
tcp 0 0 *:1044 *:* LISTEN

4. create new Remote Java Application in eclipse (i.e. configure eclipse so it can debug and publish to a remote java application from your remote location and source code project)

in eclipse (e.g. helios):
run > debug configurations
right click remote java application > new

for name write e.g. myRemoteServer trunk

in the connect tab:
for project click the browse button and choose the root of your trunk eclipse project, e.g. myProjectTrunk

for host use the remote ip address, e.g. 192.168.1.238 (for trunk on myRemoteServer)

for port use the port you specified in run.sh, e.g. 1044

click the apply button, then the debug button

sources:
http://www.eclipsezone.com/eclipse/forums/t53459.html
http://community.jboss.org/thread/78131

richfaces rich hotkey backspace navigation disabling not working with oncomplete [SOLVED]

2011-11-28T12:21:00.001+01:00

in my post richfaces rich hotkey backspace navigation disabling not working [SOLVED] i showed how to get the rich hotkey working by changing oncomplete to onclick, but what if you need oncomplete?

the hack i found to work was to set the focus to somewhere in the panel after the a4j:commandLink link was clicked.

<a4j:commandLink
value="#{detail.action}"
id="editlink"
ajaxSingle="true"
action="#{myBean.myAction}"
reRender="detailsPanel"
rendered="#{detail.actionEdit and myBean.isBuyer}"
oncomplete="if (#{facesContext.maximumSeverity==null}) #{rich:component('detailsPanel')}.show();#{rich:element('CDD_quatityInput')}.focus();">
<f:setPropertyActionListener
value="#{detail}"
target="#{myBean.currentDtlItem}" />
<f:setPropertyActionListener
value="#{row}"
target="#{myBean.currentRow}" />
</a4j:commandLink>

CDD_quatityInput is the id of an element in the panel i am showing when the link is clicked.

i saw an example today where the author also put "event.stopPropagation(); event.preventDefault();" into the handler attribute, but i havent seen the need for it yet.

richfaces rich hotkey backspace navigation disabling not working [SOLVED]

2011-11-24T11:04:00.001+01:00

i was debugging a page where i used a rich hotkey tag to disable backspace from navigating backwards in the browser history, using this code:

<rich:hotKey key="backspace" handler="return false;" disableInInput="true" />

but every time i clicked on this link to show a panel, then pushed backspace (all on the same page of code as the rich hotkey tag), backspace would still navigate backwards as long as i didnt click on the new panel (set focus on the new panel). i figured out that the problem was the use of oncomplete (not my code):

<a4j:commandLink ajaxSingle="true" id="editlink" oncomplete="#{rich:component('editPanel')}.show()">

so i changed it to onclick and then it worked! =)

<a4j:commandLink ajaxSingle="true" id="editlink" onclick="#{rich:component('editPanel')}.show()">

if you still need to use oncomplete instead of onclick, then see my article richfaces rich hotkey backspace navigation disabling not working with oncomplete [SOLVED]

ubuntu 11.10 unity turns grey and touchpad mouse stops working/freezes [SOLVED]

2011-11-15T12:10:00.001+01:00

all of the sudden, mid session, my interface went grey and the theme vanished so everything looked like an old theme and the mousepad mouse cursor wouldnt move, but i could still type and use the keyboard. to fix this i opened a terminal and ran these commands:

sudo modprobe -r psmouse
sudo modprobe psmouse

source: http://ubuntuforums.org/archive/index.php/t-77612.html

f:loadBundle not working in jboss 7, can't see properties label text [SOLVED]

2011-11-08T16:46:00.001+01:00

i made a simple jsf page to test using a properties file labels_no.properties.
here was the code i had:

<?xml version="1.0" encoding="UTF-8"?>
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
template="/WEB-INF/templates/default.xhtml">
<f:loadBundle basename="com.mycompany.labels_no" var="label"/>
<ui:define name="content">
<h:form id="reg">
<h:panelGroup id="messagePanel" layout="block">
<h:messages errorStyle="color: red" infoStyle="color: green" layout="table"/>
</h:panelGroup>
<h:form>
<h:panelGrid columns="2">
<h:outputLabel value="#{label.userFirstName}" for="userFirstName" />
...

and in the eclipes preview window i could see the label and it's value, but in a browser the label was missing. i figured out that the f:loadBundle tag was just in the wrong place, so i moved it inside the ui:define tag (the next line under it) and the label appeared! =)

see also:
http://download.oracle.com/javaee/5/javaserverfaces/1.2/docs/tlddocs/f/loadBundle.html
http://www.roseindia.net/jsf/jsf1.2/jsf-properties.shtml

jboss quickstarts kitchensink arquillian junit remote test not working [SOLVED]

2011-11-02T12:47:00.001+01:00

i ran the managed test and it worked, but when i tried the remote test i got this error:

java.lang.IllegalStateException: Cannot obtain MBeanServerConnection to: service:jmx:rmi:///jndi/rmi://127.0.0.1:1090/jmxrmi

the reason is that i needed to start the local server first, THEN run the unit test.

ref: http://stackoverflow.com/questions/7341308/cannot-run-arquillian-tests/7718339#7718339

ubuntu 11.10 unity left side bar gone [SOLVED]

2011-11-02T10:19:00.002+01:00

i upgraded to ubuntu 11.10 a while ago instead of a fresh clean install and then i (regretfully) changed some settings and then the left bar in unity disappeared. to get it back i had to do the following:
* in a terminal run:
ccsm
* search for unity
* enable Ubuntu Unity Plugin
* choose Ignore Conflicts (if you're asked about it)

the gimp mathmap plugin for linux

2011-10-28T15:27:00.000+02:00

this is the only place i can still find mathmap for linux:
http://linux.softpedia.com/progDownload/MathMap-Download-27010.html

java pet store jee example application

2011-10-25T11:07:00.003+02:00

http://java.net/projects/petstore
it seems a lot of links to the petstore app take you to a 404 page, so i thought i'd post the direct link here =)

how to run opera web browser in ubuntu 11.10 unity

2011-10-17T10:59:00.003+02:00

when i do the keyboard shortcut alt+F2 and type: opera
the only thing that comes up as a suggestion is opera-widget-manager

i found out that if i simply type: oper
then the opera icon comes up as well. i can either click on the big, red circle opera icon or just hit enter =)

weird bug.

how to organize a collaborative literary project

2011-10-08T22:45:00.000+02:00

1. go to http://docs.google.com

2. click the Create button and choose Collection and give it a new name, e.g. My Collaborative Book Project

3. right click the name of the new collection in the menu on the left and choose Create New > Document. Call it something like INDEX or Ideas/Themes/Subjects to cover. Use this document to write all your ideas, one on each line, with a little description about the idea, then create a new document for each of them, and make each of those idea lines a link to its own document.

4. share your project (collection) with your collaborators. right click the name of the new collection in the menu on the left and choose Share > Share. Type in their email addresses then choose Done.

buildbot install error: twisted/runner/portmap.c:10:20: fatal error: Python.h: No such file or directory compilation terminated

2011-10-07T11:57:00.002+02:00

i tried installing buildbot on ubuntu while following this tutorial:
http://buildbot.net/buildbot/docs/current/tutorial/firstrun.html

[
FYI:
in ubuntu, there's no package called virtualenv. you need to install the python-virtualenv package:
sudo apt-get install python-virtualenv
]

while trying to install buildbot i got the following error:

Downloading http://pypi.python.org/packages/source/T/Twisted/Twisted-11.0.0.tar.bz2#md5=d7f94a1609a1b8f3b8c8d0146d4cfe54
Processing Twisted-11.0.0.tar.bz2
Running Twisted-11.0.0/setup.py -q bdist_egg --dist-dir /tmp/easy_install-4wBTit/Twisted-11.0.0/egg-dist-tmp-odVQeg
twisted/runner/portmap.c:10:20: fatal error: Python.h: No such file or directorycompilation terminated.error: Setup script exited with error: command 'gcc' failed with exit status 1

to fix this i had to install the python-dev package:
sudo apt-get install python-dev

then rerun the last install command:
easy_install buildbot

src: http://alexsleat.co.uk/2011/01/01/fatal-error-python-h-no-such-file-or-directory/

how to find your facebook wall posts/status updates rss feed url for use in blogger/blogspot blog

2011-10-07T11:14:00.005+02:00

1. log into facebook.com

2. go here: http://www.facebook.com/notifications

3. find the text link at the top called RSS and right click on it and copy the URL. it will look something like this:
http://www.facebook.com/feeds/notifications.php?id=xxxxxxxxx&viewer=xxxxxxxxx&key=xxxxxxxxxxxxxxxx&format=rss20

where "xxx..." represents your account's personal IDs and key values,

4. paste that URL into a text editor and replace the text "notifications.php" with "status.php", so it looks like this:
http://www.facebook.com/feeds/status.php?id=xxxxxxxxx&viewer=xxxxxxxxx&key=xxxxxxxxxxxxxxxx&format=rss20

rss20 can also be changed to atom10 for an atom feed

5. paste the new URL into e.g. blogger's rss feed widget

extra secure password identification

2011-10-06T09:17:00.002+02:00

this would make it a little more difficult to crack a password:
require the user to enter the password, click enter, authenticate the password, then have the user repeat the operation one more time, if both times match then you're let in. it would at least double the amount of time it would take to crack a password.

latin tts (text to speech)

2011-07-19T14:05:00.000+02:00

install espeak on ubuntu
sudo apt-get install espeak

then run this (substitute the text with your own):

espeak -v latin "in hoc signo vinces"

ubuntu 11.04 sound problems and solutions (hdmi + normal audio)

2011-06-11T10:45:00.000+02:00

when i hooked my laptop up to my tv using an hdmi cable the sound was totally crappy. i read (i cant remember where, sorry) that to fix it you need to disable the normal audio interface:
System > Preferences > Sound > Hardware
choose Internal Audio
profile: Off

it worked perfectly. when i was does and renabled Internal Audio, i couldnt hear any sound with normal audio, like youtube in chrome or playing local files with vlc. to fix this i read No sound at all.
all i had to do was this:
rm -r ~/.pulse ~/.pulse-cookie

how to import/overwrite mysql database to a remote server using the command line

2011-05-30T15:08:00.000+02:00

i installed tikiwiki on a domain i have hosted on domeneshop.no and they recommended not to use phpmyadmin, but mysql workbench instead. i wanted to import an old tikiwiki i had started 2 years ago. i used like an hour trying to setup mysql-workbench and kept getting the error:

ERROR 1046 (3D000) at line 22: No database selected

when all i really needed to do was open a terminal and run this:
mysql --host=myhost.example.com --user=myUser5 -p --default-character-set=utf8 myDbSchemaName < "/home/nick/sqlFileToImport.sql"

how to install printer and scanner drivers on ubuntu 64-bit for brother DCP-9270CDN

2011-05-23T12:22:00.001+02:00

printer install (printer drivers are i386 even for amd64/64-bit):
sudo dpkg -i --force-all dcp9270cdnlpr-1.1.1-5.i386.deb
sudo dpkg -i --force-all dcp9270cdncupswrapper-1.1.1-5.i386.deb
dpkg -l|grep Brother

go here: http://localhost:631/printers
click the link: DCP9270CDN
dropdown box: Administration > Modify Printer
choose radio button: LPD/LPR Host or Printer
set lpd to: lpd://XXX.XXX.XXX.XXX/binary_p1
(replace the XXX's with the ip address for your network printer)

scanning install:
sudo apt-get install sane-utils
sudo dpkg -i --force-all brscan4-0.3.0-2.amd64.deb
dpkg -l|grep Brother
brsaneconfig4 -a name=SCANNER model=DCP-9270CDN ip=XXX.XXX.XXX.XXX
brsaneconfig4 -q|grep SCANNER
sudo dpkg -i --force-all brscan-skey-0.2.1-3.amd64.deb
dpkg -l|grep Brother

start the scanner tool:
brscan-skey

check to see if the scanner is "Active":
brscan-skey -l

to scan, put the document on the scanner, press "Scan" button on the scanner, choose your user (e.g. "nick"), press "Start".
gimp will open automatically on your computer with the scanned image open as an image. i found that i had to close gimp completely after each successive scan otherwise i would get an error.

ocr - tesseract vs oscroscript (ocropus) - how to convert image to text

2011-05-05T09:45:00.000+02:00

both tesseract and ocropus are developed by google, but for some reason ocropus misses the first line of the paragraph. see for yourself:

tesseract output:

The book is the synthesis of, on one hand, the no-nonsense
mathematical trader (sdf-styled “practmcnct of uncettaintfl who
spent his life trying to resist being fooled by randomness and mult the
emotions associated with uncertainty and, on the other, the aesthetically
obsessed, litcr:itun:·l0ving human being willing to be fooled by any form
of noruense that is polished, refined, original, and tasteful. I um not
capable of avoiding being the fool of randomness; what l can do is
confine it to where it brings some aesthetic gratification.

ocropus output:

mathematical trader (sdf-styled “practmcnct of uncettaintfl who spent his life trying to resist being fooled by randomness and mult the emotions associated with uncertainty and, on the other, the aesthetically obsessed, litcr:itun:·l0ving human being willing to be fooled by any form of noruense that is polished, refined, original, and tasteful. I um not capable of avoiding being the fool of randomness; what l can do is confine it to where it brings some aesthetic gratification.

compare the original (orig) image with the monochrome image. i had to convert it to monochrome to get a decent output.

this is how i did it in gimp:
1. first i enlarged the image so i could see more clearly the individual letters
2. colors > levels > edit settings as curves
i dragged the diagonal line down to the right just a little bit to make the letters a little more full looking (decrease the cloudy anti-aliasing effect)
3. image > mode > indexed > use black and white (1 bit) palette
turns it monochrome

now you have a png you can use to get a decent result with using ocroscript:

ocroscript recognize surface02.png > surface02.html

tesseract needs a tif file so you have 1 more step to get the better result with tesseract (the first line, which ocroscript doesnt manage to get):

4. layer > transparency > remove alpha channel
now save as *.tif and run this:

tesseract surface02.tif surface0.txt

moving my vbulletin forum here

2011-05-05T09:27:00.001+02:00

the vbulletin version i'm using on The Royal Nick Humphrey Global World IT Forum, Home Edition is getting old now and i dont want to pay for a new one/upgrade.

last week my post table got corrupted, "coincidentally" right after i put a link in my signature to my website with lesser-known information, in norwegian, about the mormon church, that they dont want you or their members to know about. my website is called mormonerne. i suspect that someone from the church has tried to shut my site down, but i cant prove it. the exmormon site has had a lot of attacks so it's not unlikely, but it got me to thinking about security in general--it might be good to move my forum to a place like blogger, owned by google, where it would be harder for a hacker to do damage. so EAT THAT mormon hacker trash (if it was a mormon) lol =)

so all my new posts and IT tutorials will be posted here from now on.