Share folder between Windows and Ubuntu 12.04 by mean of Samba

The best way to share folder between different Windows and Linux is to share it on Linux and let Windows explore it in network. Sharing on Windows and exploring from computer and folder from Ubuntu is never stable (Linux guru could do this, but it is not for ordinary user).

Follow pretty good illustrated instructions, works fine for 12.04:
http://www.liberiangeek.net/2010/06/how-to-quickly-change-workgroup-name-in-ubuntu-10-04-lucid-lynx/

Restart samba service after each sharing( just in case :) ), in Ubuntu 12.04 as:

sudo restart smbd

If smth does not work, restart Linux PC, this will help windows to see your Linux :). 

Cleaning cache for Apache by htcacheclean

Detecting apache cache problem, cleaning cache for apache by htcacheclean.
good pages: page1, page2, page3.

My case:
in apache config /www/etc/apache/adm/virt.serv/10_my-service.cfg:

CacheRoot /www/cache/my-service
CacheDirLevels 2
CacheDirLength 1
CacheDefaultExpire 3600
CacheIgnoreCacheControl On
CacheEnable disk /my-service/

I get different content:

wget https://server.com/my-service/css/layout.css

wget https://test-server.com/my-service/css/layout.css

as HTTP Header have value:

Cache-Control: max-age=31556926, must-revalidate 

How to get this in Firebug addon of Firefox:

Or you can do this from terminal :

06:20 PM ~ $ curl -I https://server.com/my-service/css/layout.css
HTTP/1.1 200 OK
Date: Wed, 24 Apr 2013 01:20:08 GMT
Server: Apache/2.2.19 (FreeBSD)
Expires: Thu, 24 Apr 2014 07:08:54 GMT
Cache-Control: max-age=31556926, must-revalidate
Last-Modified: Mon, 22 Apr 2013 17:32:10 GMT
Content-Length: 36490
Connection: close
Content-Type: text/css
Set-Cookie: Coyote-2-4a7446e9=c0a89971:0; path=/

So caching could be adjusted on Tomcat side, after then on Apache side(CacheDefaultExpire and "CacheEnable disk /my-service/"), and then kept by user's Browser(Cache-Control: max-age). 

Cache could be adjusted in tomcat side in Spring config (28800 = 8 hour):

<mvc:resources mapping="/css/**" location="/css/" cache-period="28800" />

So after each Tomcat rollout we have to do:

htcacheclean -p/www/cache/my-service -l1K -v

if you have problem on apache clear cache like "An error occurred, cache cleaning aborted."

be sure you  /www/cache/my-service/ is created and "chown apache /www/cache/my-service/", "apache" username is taken from "ps -ef| grep http" as on Freebsd it is "www". Also be sure you launch htcacheclean under right user.

SevNTU Checkstyle version 1.8.0

We finished new version of our extension for Checkstyle - release 1.8.0, new and noteworthy.

new NestedTernaryCheck.
Main idea of check to forbid to use nested ternary conditions, as it hard to read and debug them then
if(){}else{},  example:

int smth = (a == b) ? -1 : (c == d) ? 0 : 1;

this code is very compact, but it is disaster for other developer to understand and debug this code. In this case we could say logic is archived, and need spend extra time to extract logic over over again during debug, and that compact view does not contribute to performance.

Expected code is substitution by function:
int smth = calculateSmth(a, b, c, d);
or:
int smth = -1;
if (a!=b) {
  if (c ==d) {
      smth = 0;
  } else {
      smth = 1;
  }
}
The only benefits to use such statement is to declare "final" variable, so this is available as option in check, but it is not selected by default.


new ForbidReturnInFinalBlockCheck.
Return statement in final block is allowed by compilation. But it is highly non-recommended to use it, as it change return of main logic.
Example:

try { 

   return true; 

} finally { 

   return false; 

}

More info and discussion is here.


Bug fixing for existing checks:
 - Message improvement in ChildBlockLengthCheck,
 - bug fixing in AvoidHidingCauseExceptionCheck and OverridableMethodInConstructorCheck,
 - ignore methods now support RegExp at ReturnCountCheckExtended.


Note:
Available as EclipseCS extension and as extension for maven-checkstyle-plugin. Install instructions.

List of Open Source Organizations that are rejected for GSoC 2013

Logs of conversation in IRC @freenode #gsoc at April 19th 2013.

List of Organizations that did not pass GSOC 2013:
It not full list ! gathered from channel queue of "#gsoc" at April 19th 2013.

helenos	http://trac.helenos.org/report/19
Ninux.org	http://wiki.ninux.org/GSoCIdeas2013
gc3	http://code.google.com/p/gc3pie/wiki/GSoCIdeas
Xpra	https://www.xpra.org/trac/wiki/ProjectIdeas
wxWidgets	http://www.wxwidgets.org/gsoc/2013/
VideoLAN	http://wiki.videolan.org/SoC_2013
darcs	http://darcs.net/GSoC
lemora	http://lemora.wiki.tum.de/ideas
Broadleaf	https://github.com/BroadleafCommerce/BroadleafCommerce/wiki/Google-Summer-of-Code-2013
fairmat	http://fairmat.com/developers/projects-ideas/
FFmpeg	http://wiki.multimedia.cx/index.php?title=FFmpeg_Summer_of_Code_2013
octave	http://wiki.octave.org/Summer_of_Code_Project_Ideas
Tatoeba	http://en.wiki.tatoeba.org/articles/show/gsoc_ideas
Inktank	http://ceph.com/gsoc2013/gsoc-ideas/
Soot	http://sites.google.com/a/boisestate.edu/soot-gsoc-idea-list/
X2Go	http://wiki.x2go.org/doku.php/events:gsoc2013?rev=1363091158
gstreamer	https://live.gnome.org/GStreamer/SoC2013
Haiku	http://www.haiku-os.org/community/gsoc/2013/ideas
libav	http://wiki.multimedia.cx/index.php?title=Libav_Summer_Of_Code_2013
mailman	http://wiki.list.org/display/DEV/Google+Summer+of+Code+2013
balabit	https://github.com/balabit/GSoC2013/wiki/Idea-&-Project-list
rohc	http://rohc-lib.org/wiki/doku.php?id=ideas-list
LISPmob	http://www.lispmob.org/gsoc2013
AtomicBlue	http://planeshift.top-ix.org/pswiki/index.php?title=GSoC_2013
Scilab	http://wiki.scilab.org/GSoC_project_proposal
libgdx	https://code.google.com/p/libgdx/wiki/GoogleSummerOfCode2013
Stud.IP	http://docs.studip.de/gsoc2013/index.php/Main/IdeaList
VTK	http://vtk.org/Wiki/VTK/GSoC_2013
Dr.Memory	http://code.google.com/p/drmemory/wiki/Projects
TuttleOFX	https://sites.google.com/site/tuttleofx/gsoc-2013/ideas-list
bitfighter	http://bitfighter.org/wiki/index.php/GSOC_ideas
SunPy	https://github.com/sunpy/sunpy/wiki/GSoC-2013-Ideas
AdhearsionFoundation	http://adhearsion.com/gsoc
buddycloud	https://buddycloud.org/wiki/Google_Summer_of_Code_2013
Drupal	http://groups.drupal.org/google-summer-code-2013
CGoGN	http://cgogn.unistra.fr/GSoC2013/
teammates	https://docs.google.com/document/d/1fAvYvQr0E93OsZgyneaXGX0jaMA-zptTIxqLn83xwN0/pub
sevntucheckstyle	http://sevntu-checkstyle.github.com/sevntu.checkstyle/gsoc-2013-ideas.html
tradelink.org	https://docs.google.com/a/pracplay.com/spreadsheet/ccc?key=0AtDVxYA-85_4dF9INHlZQVNCMUVPdXlsc3R2dF9SRlE#gid=0
reviewboard	https://hackpad.com/Student-Project-Ideas-vK8BOo8eOpe
codebender	https://docs.google.com/document/d/1JQllHqz7Iocu-lTVBPVkDEc6pL_3VuxZgu8ewZiCT88/edit?usp=sharing
ITK	http://www.itk.org/Wiki/ITK_Google_Summer_of_Code/2013
comunes	http://kune.cc/#!comunes.wiki.318.529
copyleftgames	http://gsoc.copyleftgames.org/
PyDy	https://pydy.org/gsoc_2013_ideas
CellCollective	http://www.thecellcollective.org:8080/cc.web/spring/gsoc-flow
MATE_DE	http://wiki.mate-desktop.org/gsoc:2013#ideas
Brackets	https://github.com/adobe/brackets/wiki/Google-Summer-of-Code-2013-Project-Ideas
OpenIntents	http://code.google.com/p/openintents/wiki/GSoC2013Ideas
Geeklog	http://wiki.geeklog.net/index.php/Google_Summer_of_Code
Simbios	http://wiki.simtk.org/dissemination/SWIdeas
Luxunda	http://www.luxunda.es/gsoc-2013
ClimatePrediction.net	http://climateprediction.net/GSOC/
comunes	http://kune.cc/#!comunes.wiki.318.529
CloudNets	https://projects.net.t-labs.tu-berlin.de/projects/cloudnets-framework/wiki/Ideas
BuddyPress	codex.buddypress.org/gsoc2013/
Xapian	http://trac.xapian.org/wiki/GSoCProjectIdeas
ging	http://ging.github.io/projects.html
Shoes	https://github.com/shoes/shoes4/wiki/GSOC-2013-idea-list
OBF	http://www.open-bio.org/wiki/Google_Summer_of_Code

Why Screenshots pages are required on UI applications web sites

Here will be summary or draft thoughts about description pages for UI applications:

When somebody search for application he do it by textual search in google/bing/.... that approach direct him to your project/application page with description. And from that step investigation approach become different.

Your project will never be alone in goolge search results - but you have to persuade new user examine list of features and to download and try your application.

Both that targets could be done only if content that you provide on web site is easy to read (small chunks of text that describe key feature), and PICTURES for most cool features!

Pictures are vital and indispensable ! by means of good picture you can describe more that you can describe in big text paragraph. Nobody will read your description ! Text descriptions are for search engine bots only!
By means of cast of screenshot you can force user to fall in love with your application - from first sight!
Or by judging of screens user could understand that that this application is not for him - but he will not spend his time on testing your application so user's attitude will not be negative, it will stay neutral - IT IS BETTER THEN NEGATIVE.

Absence of Screeshots pages at your site - will make your project to be reviewed the last.

Even shell applications/scripts need screeshots !!  see example for zsh-git-prompt below.

Good example examples:
any Firefox or Thunderbirs addon description page, example1, example2.
Meld - http://meldmerge.org/features.html
Shutter - http://shutter-project.org/preview/screenshots/
Eclipse plugins - example
Xchat - http://xchat.org/
Git shell prompt - https://github.com/olivierverdier/zsh-git-prompt.

Bad example:
DSM library -  http://jdsm.sourceforge.net/index.html
Xchat-gnome - https://live.gnome.org/Xchat-Gnome
JMeter - http://jmeter.apache.org/index.html 
...
i will keep posting as smth come to my attention.

Visual merge tools to resolve conflicts

Git visual merge in conflict:
http://www.gitguys.com/topics/merging-with-a-gui/

Meld - Works fine, but not intuitive.


sudo apt-get install meld

git mergetool -t meld
Main idea is to merge left and right versions to middle version and press Cntl+s.

kdiff3 - more intuitive and more settings.

sudo apt-get install kdiff3

git mergetool -t kdiff3

After that launch "git clean -f" to remove all un-tracked files.
It also possible to adjust git to avoid temp files creation
"git config --global mergetool.keepBackup false"

of adjust  your merge tool:
- Meld - does not have that feature
- kdiff3's settings are set to not create a backup:
Configure/Options => Directory Merge => Backup Files (*.orig)

Force Oracle to recalculate execution plan for a table

Steps to force Oracle to recalculate execution plan for tables:

EXEC DBMS_STATS.GATHER_TABLE_STATS('<Schema_name>','<Table_name>'); 

-- deprecated approach

ANALYZE table <SCHEMA_NAME>.<TABLE_NAME> compute statistics;

and, DBMS_STATS.GATHER_TABLE_STATS is preferable (source: link, oracle-link)

SmartTemplate4 bugs that bother me

SmartTemplate4 bugs that bother me :

Settings dialog window: tab control does not resize with window
Teach %from(firstname)% about Lastname, Firstname format

Author do fix quickly for Lastname-FirstName, I did 10$ contribution.

Add option to ignore subfolders by regexp in Krusader search

Please vote if also require this:
My feature request: https://bugs.kde.org/show_bug.cgi?id=318111

FYI: http://www.krusader.org/documentation/krusearcher.html, here I found good option "* | *.xml" - to search in all files except for "*.xml"

Java DecimalFormat example

Sites to launch java code online:
http://www.compileonline.com/compile_java_online.php
http://www.javalaunch.com/JavaLaunch.jsp (no restrictions)
http://rextester.com/runcode (attention: it restrict class to be named as Rextester) list of all, here .

Task: Print 0.1278 as 12.8%. java doc.

 Code:

import java.text.DecimalFormat;

public class Test {

 static public void customFormat(String pattern, double value) {
  DecimalFormat myFormatter = new DecimalFormat(pattern);
  String output = myFormatter.format(value);
  System.out.println(value + "  " + pattern + "  " + output);
 }

 static public void main(String[] args) {
  customFormat("000.0%", 0.1278);
  customFormat("#0.00%", 0.1278);
  customFormat("###.##%", 0.1278);
  customFormat("##0.0%", 0.1278); ////!!!!!
  customFormat("#.####%", 0.1278);
 }

}

Connect from to Oracle DB from Groovy

http://www.javaworld.com/community/node/2886

For Ubuntu 12.04:

groovy -cp /u01/app/oracle/product/11.2.0/xe/jdbc/lib/ojdbc6.jar toOracle.groovy

content of toOracle.groovy:

import groovy.sql.Sql

sql = Sql.newInstance("jdbc:oracle:thin:@localhost:1521:xe", "user_schema", "password",
"oracle.jdbc.pool.OracleDataSource")
sql.eachRow("SELECT id FROM user_schema.table_name")
{
println "The employee's name is ${it.id}."
}