JFrigo technical blog

Ubuntu 9.10 - JDK6

noreply@blogger.com (yozi) — Sun, 08 Nov 2009 15:11:00 +0000

Ubuntu 9.10 supports openjdk by default. To install the SUN JDK, the /etc/apt/sources.list file has to be extended by the following lines:

deb http://ftp.debian.org/debian squeeze main contrib non-free
deb-src http://ftp.debian.org/debian squeeze main contrib non-free

After that, JDK install is simple:

sudo apt-get update
sudo apt-get install sun-java6-jdk

trac install - win XP

noreply@blogger.com (yozi) — Sun, 08 Feb 2009 14:20:00 +0000

Components:

Apache 2.0.63
SVN server 1.5.5
Python 2.5
svn-python 1.5.5
Genshi 0.5.1
SetupTools 0.6c9
Trac 0.11
mod_python 3.3.1

How to install and configure:

Had to move IIS to port 1080 to make port 80 available for Apache:
My computer /manage / IIS / default site / properties
Apache: next-next-OK
SVN server: extract the ZIP file and use the README in the zip file
The referenced tortoisesvn howto is useless, but the end of the README itself is OK
no installer, copy modules to Apache, add svnserver\bin to SYSTEM path, edit httpd.conf and REBOOT.
Run "svnadmin create d:\repository\subversion\sandbox"
Subversion is available now at http://localhost/svn
Python: next-next-OK
svn-python: next-next-OK
Genshi: next-next-OK
SetupTools: next-next-OK
Trac: next-next-OK
Run python25\Scripts\trac-admin.exe
trac-admin d:\repository\trac\sandbox initenv
(SVN repository: d:\repository\subversion\sandbox)
test: python25\Scripts\tracd --port 8000 d:\repository\trac\sandbox
URL: http://localhost:8000/sandbox
mod_python: next-next-OK
Apache config:

copy mod_dav_svn.so & mod_authz_svn.so to apache2\modules

enable (uncomment in apache2\conf\httpd.conf):
LoadModule dav_module modules/mod_dav.so
LoadModule dav_fs_module modules/mod_dav_fs.so

add:
LoadModule dav_svn_module modules/mod_dav_svn.so
LoadModule authz_svn_module modules/mod_authz_svn.so
LoadModule python_module modules/mod_python.so

add locations and authentication to httpd.conf, see http://trac.edgewall.org/wiki/TracModPython

Note: I had to use apache2/bin/htpasswd.exe with the "-p" option to generate authentication that works.
Enable WebAdmin for your username:
python25\scripts\trac-admin.exe /repository/trac/sandbox permission add username TRAC_ADMIN
Test: http://localhost/trac/sandbox
(works fine for me)

How to suck:

I have lost a lot of time trying to integrate svn-win32-1.5.5_py.zip to python.
The solution was installing svn-python-1.5.5.win32-py2.5.exe

NSLU2

noreply@blogger.com (yozi) — Mon, 02 Feb 2009 21:49:00 +0000

My NSLU2 came with the ancient firmware version v2.3R24. The newest available firmware is V2.3R63, although dead links can be found at the linksys site to V2.3R76.

I have tried to upgrade using the web interface, but it did not work, just the status led started blinking green/amber for hours, until switch-off (in theory, the upgrade should have been finished in 5-10 minutes). After restart the unit came up with the old firmware.

JSR 227: A Standard Data Binding & Data Access Facility for J2EE

noreply@blogger.com (yozi) — Wed, 14 Jan 2009 11:06:00 +0000

Az Oracle ADF a JSR-227 szerint valósítja meg a UI és a Service réteg közötti kapcsolatot.
Az alábbi PDF egy tömör, jó összefoglalás:
http://www.nljug.org/pages/events/content/jfall_2005/sessions/00016/slides.pdf/

Subversion

noreply@blogger.com (yozi) — Fri, 09 Jan 2009 08:51:00 +0000

Windows szerverek:

http://www.collab.net/downloads/subversion/

Regisztráció szükséges a letöltéshez
A web site a technikai jellemzők bemutatása helyett a költségmegtakarítással ködösít

http://www.visualsvn.com/server/download/

Azonnal letölthető, minden benne van
A web site szerint a jogosultságok kényelmesen menedzselhetők
Ezt választottam.
A szerver beállítása és egy repository (adf) létrehozása egyszerű volt.
A TortoiseSVN-ben a https://localhost:8443/svn/adf címet kellett beállítani az eléréséhez. (Ezért egy kicsit küzdeni kellett, magamtól nem így próbálkoztam).
Utálja, ha a víruskergető nézegeti a repository tartalmát (commit közben leáll, ha más process is megnyitja a fájlt).
Az Oracle is ezt ajánlja: http://www.oracle.com/technology/pub/articles/adf-development-essentials/part1.html

http://subversion.tigris.org/servlets/ProjectDocumentList?folderID=91

A trac telepítéséhez, a helyi Python kapcsolathoz ezt használom.
Apache2 is kell hozzá, egy kicsit dolgozni kell vele.

Windows kliensek:

http://www.sliksvn.com/en/download - parancssoros kliens
http://www.collab.net/downloads/subversion/ - regisztráció szükséges a letöltéshez

Best of (the serverside)

noreply@blogger.com (yozi) — Sat, 14 Oct 2006 10:36:00 +0000

5 Principles For Programming: (1) Fail Fast (don't hide errors), (2) Write Less Code (and Don't Repeat Yourself), (3) Computer Programs are for People (4) Do the Right Thing (5) Reduce State (6) Know Your Shit

Linux on Acer TravelMate 4062

noreply@blogger.com (yozi) — Sun, 01 Oct 2006 12:57:00 +0000

Ubuntu 6.0.6 - nice, but does not use the 1280x800 screen resolution and wireless does not work

OpenSuse 10.1 - configured the display correctly to 1280x800, wireless is OK, but the wired ethernet does not work. Second install: wired ethernet is OK. The NetworkManager applet could not connect to wireless, but disconnected the wired.

Fedora Core 5 - Desktop/System Settings/Display knows the 1280x800 resolution, but the Desktop/Preferences/Screen Resolution does not. Wireless is not detected.

Intel PROSet on Acer 4062

noreply@blogger.com (yozi) — Sat, 16 Sep 2006 19:49:00 +0000

Initial state: wireless works with the pre-installed windows drivers, but I need some features of Intel PROSet.

First try: download latest Intel PROSet (version 10.1.1). Install. Reboot. Standard (Windows XP) wireless driver works (as before), Intel PROSet does not work (does not find any Intel Wifi adapter) and configuration changes do not help.
Second try. Download Intel PROSet 9.0.0.39 from Acer's site. Install. Reboot. No wireless at all.
Third try. Upgrade Intel PROSet to version 10.1.1. It works.

HTML GUI - Stripes

noreply@blogger.com (yozi) — Sat, 16 Sep 2006 14:48:00 +0000

Stripes wants to be simpler than other web frameworks and succeeds. It is much easier to create a stripes GUI and results in less complexity than struts. See http://stripes.mc4j.org/confluence/display/stripes/Quick+Start+Guide for a first impression.

Free software

noreply@blogger.com (yozi) — Sun, 28 May 2006 18:15:00 +0000

TheOpenCD. (AbiWord, OpenOffice.org, MoinMoin, PDFCreator, 7-zip, Notepad2, etc.)

Logging to syslog

noreply@blogger.com (yozi) — Thu, 25 May 2006 14:15:00 +0000

Enable network messages:
* add "-r" option to /etc/sysconfig/syslog (Fedora Core 4)
* add the "local6" feature to /etc/syslog.conf

local6.*   /var/log/local6.log

* restart syslog (/etc/rc.d/init.d/syslog restart)

Check if syslog is listening:

root@yozi:/etc/rc.d/init.d> netstat -l
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State
udp        0      0 *:syslog                    *:*

Rotate the new log:
* add /var/log/local6.log to /etc/logrotate.d/syslog (Fedora Core 4)
* logrotate is started by anacron (/etc/cron.daily/logrotate)

Code generation

noreply@blogger.com (yozi) — Wed, 24 May 2006 07:45:00 +0000

* JAG
* OpenXava and discussion at theserverside

Content Management

noreply@blogger.com (yozi) — Wed, 24 May 2006 07:40:00 +0000

IBM web content management
- CMSwire article (Aug. 2004)
- DeveloperWorks article (Jul 2004)
- DB2 Content Management.
- IBM Workplace Web Content Management.
JSR 170:
- Introduction (developerworks, Aug. 2005).
- Apache JackRabbit (full JSR170 implementation, 1.0 in April, 2006).
- JLibrary: Rich GUI (based on JSR170 engine : JackRabbit, see discussion at theserverside)
- Alfresco: JSR170 repository
- Magnolia (sourceforge, webapp, w/versioning, w/o workflow, jspx-based templating w/special taglib, community edition is free, enterprise edition is licensed per processor per year).

SOA

noreply@blogger.com (yozi) — Thu, 18 May 2006 07:32:00 +0000

BEA Resurces

noreply@blogger.com (yozi) — Fri, 05 May 2006 15:25:00 +0000

BEA AquaLogic User Interaction

Software Development Resources

noreply@blogger.com (yozi) — Fri, 05 May 2006 14:38:00 +0000

Service Data Objects

noreply@blogger.com (yozi) — Thu, 06 Apr 2006 12:02:00 +0000

SDO is based on the concept of disconnected data graphs. A data graph is a collection of tree-structured or graph-structured data objects. Under the disconnected data graphs architecture, a client retrieves a data graph from a data source, mutates the data graph, and can then apply the data graph changes back to the data source.

... from http://www-128.ibm.com/developerworks/library/specification/j-commonj-sdowmt/index.html ...

Service Component Architecture

noreply@blogger.com (yozi) — Thu, 06 Apr 2006 11:09:00 +0000

• http://dev2dev.bea.com/technologies/commonj/index.jsp
• http://www.ibm.com/developerworks/library/specification/ws-sca/
• http://www.iona.com/devcenter/sca/
• http://oracle.com/technology/webservices/sca
• https://www.sdn.sap.com/
• http://www.sybase.com/sca

AJAX

noreply@blogger.com (yozi) — Thu, 09 Feb 2006 13:48:00 +0000

ajaxpatterns.org
ajaxmatters.com
Yahoo! User Interface Library
http://www.tibco.com/software/ria/default.jsp - seems to be OK
http://bennolan.com/behaviour/ - some extensions

Java ThreadPool

noreply@blogger.com (yozi) — Wed, 11 Jan 2006 17:34:00 +0000

ThreadPool is available in Java 5.
For older Java versions, even the Jakart Commons ThreadPool points to util.concurrent.
LinkedQueue (Channel) and PooledExecutor are my first tested classes and work well.

WebLogic on Fedore Core 4

noreply@blogger.com (yozi) — Sat, 07 Jan 2006 20:42:00 +0000

WebLogic 8.1 did not work with JRockit (core dumps). Experienced networking problems with the Sun JDK 1.4.2. The solution: java -Djava.net.preferIPv4Stack=true

WebLogic 9.1 works fine with JRockit.

Ruby

noreply@blogger.com (yozi) — Tue, 06 Dec 2005 06:38:00 +0000

Ruby Home Page.
Ruby on Rails.
Ruby Central.
ruby-doc.org.

Logo Interpreters

noreply@blogger.com (yozi) — Fri, 02 Dec 2005 22:23:00 +0000

KTurtle is already installed with Fedora.

The logo blog: http://tacojuice.org/plnews/Languages/Logo/ contains news about three Java projects: jLogo, XLogo, and StarLogo. The freshmeat site is useful, as well. Logo is available even in Python (http://pylogo.org). There are several other Logo interpreters written in Java,

even as an applet,
or tortue.

Good collection of Logo links are

The oldish (classical?) UCB Logo works fine on Windows, but does not have any graphix on my Fedora Linux. Some nice features are described in http://www.erzwiss.uni-hamburg.de/Sonstiges/Logo/logofaqx.htm. The web-page of its graphix front-end glogo says it is unfinished. Continuation at http://www.physik.uni-augsburg.de/~micheler/.

Blog software

noreply@blogger.com (yozi) — Wed, 30 Nov 2005 09:28:00 +0000

Blog feature in mediawiki? No. Maybe the discussion page can be used as sime kind of blog about the topic.
http://java-source.net/open-source/bloggers

My personal Wiki accounts.

noreply@blogger.com (yozi) — Wed, 30 Nov 2005 07:00:00 +0000

I have started accounts at several wiki hosts. Which one to keep?

yozi.pbwiki.com

Editing is password protected.
Read-only for public.

http://wikihost.org/wikis/yozi66

My problem is that this wiki will be editable by anyone or will be invisible.
Okay, wiki is about editing by everyone, but I would like to have at least some "locked" pages...
I need a public wiki where I can control the rights for editing.

http://seedwiki.com / wiki/jfrigo/jfrigo.cfm / blog.

Free account with 250 MB limit
Have to pay to have the option to restrict page editing
I can lock a page, at least, for free
Blog is provided as special wiki pages - can be edited by anyone (or locked)
seedwiki.org is disappointing (no download for source code)

http://jot.com

Nice wiki with administration and e-mail features, authorization, etc.
Has WYSIWYG editor, wiki markup and XML editor, even wiki -level XML export.
Max. 20 pages, max. 5 users for free.

http://www.duckcomputing.com/wiki/Free_Wiki_Hosting (supports snipsnap and mediawiki + others)

I need a public wiki where I can control the rights for editing.
One such software is snipsnap (is it true?), where wiki pages can have comments.

http://riters.com

pages may be protected ("Contact us")

http://yozi36.xwiki.com

Seems to be a deep technical stuff. I do not like it.