KORAY - IT system consulting

JVM Performance Tunning

2011-12-31T08:14:00.000-08:00

Everything I Ever Learned About JVM Performance Tuning @Twitter

Create attractive screenshot-based support documents in minutes

2011-07-26T04:37:00.000-07:00

The ScreenSteps desktop app for Windows and Mac lets users create attractive screenshot-based support documents in minutes. You can capture full or partial screenshots, add relatively sophisticated annotation and then publish to the web or export in HTML or PDF formats.

Web site : http://www.bluemangolearning.com/

One-line SOAP Messages

2011-07-07T02:18:00.000-07:00

Your logs should be optimized for maintenance in enterprise applications. That means you need to optimize your log for standard text processing with standard tools like GREP. Best practice for XML logs is to make them one line in the log file. So that you can search them with grep command having more than one criteria. If you XML message is not oneline you can use following command to convert them to a one line message and log this with your logger.


s=  s.replaceAll("\\r\\n|\\r|\\n", "");
logger.debug(s);

Java SE 6 and Webservices

2011-07-03T13:50:00.000-07:00

Webservices can be written using core Java SE 6 (Java Standard Edition 6) or greater without any additional software. All of the required librarires are available in Java SE 6. Java SE 6 ships with JAX-WS.

ref: http://www.amazon.com/gp/search?index=books&linkCode=qs&keywords=059652112X

Using Maven from a local repository

2011-03-29T14:14:00.000-07:00

Maven has a local repository. Local repository is used to store all the projects' libraries. When you build your application with maven by your build script maven will download all the depended libraries to your local repository. But if you are behind a corporate firewill and do not have access to a proxy you can download all the libraries first at home and tell maven to use those local libraries.

Maven local repository is default to home directory (~/.m2 on Unix/Mac OS X and C:\Documents and Settings\username\.m2 on Windows). Often times, you need to change the default location for maintainability purpose, .m2 is not a meaningful name:).

Maven configuration file
This file is under {M2_HOME}\conf\setting.xml
Location of the local repository is definfed in this file.

Find the following “localRepository” pattern, and define your new Maven local repository inside the “<localRepository>” element.

<settings>

  <!-- localRepository
   | The path to the local repository maven will use to store artifacts.
   |
   | Default: ~/.m2/repository

  <localRepository>/path/to/local/repo</localRepository>
  -->
 
<localRepository>D:/maven_repo</localRepository>

Maven will use this local repository location. If maven finds all the libraries on the local drive it will not try to download them from an online repository.

Uncommon Image Search Engines

2010-09-16T03:00:00.001-07:00

TinEye, submit an image to discover the source of the image, where it is being used and check out its modified or higher resolution versions if they exist on the web.
GazoPa, a useful search engine to look for images similar in color, shape or other optional parameters, to the one you submitted. Search results are viewable in two layouts.
RGBStock.com, a good place to search for high quality and royalty-free photos and choose the ones you like to download. Type a keyword to search for the photos or check out what are the most downloaded photos.

Best Free Utilities

2010-09-15T08:18:00.000-07:00

APPLICATIONS
FreeFileSync is an Open-Source folder comparison and synchronization tool. It is optimized for highest performance and usability without restricted or overloaded UI interfaces. -> See the helpfile for the list of key features!
http://sourceforge.net/projects/freefilesync/

Allway Sync is my third recommendation. It is a very well rounded product with loads of features.
http://www.allwaysync.com/

Best Free Security list
http://www.techsupportalert.com/content/probably-best-free-security-list-world.htm

PureSync is the top pick in this category. The only major feature that I found it lacks is the ability to copy open or locked files in the free edition.
http://www.jumpingbytes.com/en/puresync/index.html

Lupas Rename
Lupas Rename is a FREEWARE program developed to rename a big number of files.
http://rename.lupasfreeware.org/download.php

Everything Search Engine
It finds files on your hard drive faster than any product we’ve tested. Even on a terabyte sized drives containing hundreds of thousands of files your search results appear near instantaneously.
http://www.voidtools.com/download.php

GNU PLOT
GNU Plot is a portable command-line driven graphing utility for linux, OS/2, MS Windows, OSX, VMS, and many other platforms.
http://www.gnuplot.info/

ONLINE SERVICES
Drop.io "gives you up to 100 MB per drop with no limit on the number of drops and a host of features and unique ways to add and share your drop."

Bender Converter, an easy-to-use online application to convert videos directly from YouTube and other services in 3 steps—choose a format to convert to, give a video page link, then click Convert and download the converted file you need.

ScreenToaster records your screen session in full desktop or fixed rectangular area with audio input from a microphone or auxiliary device, then upload to ScreenToaster, YouTube, or save it in mov or swf format.

Meebo, "You can log in to any of your IM networks, including: AIM, Yahoo, Google, MSN, ICQ, Jabber & Meebo, all from one page. With it's vast extra language support, it adds a lot of flexibility."

PRINTING WEB
PrintWhatYouLike, "a free online webpage editor lets you quickly remove images or the background of a webpage, click and add the boxes or frames you want, isolate and resize them, change the font type and size, fit your selection to a page width, redo or undo an edit and save in pdf or html formats."

Readability, a simple tool to make reading individual articles on the Web more enjoyable and printing them with no cluttering. Set the style, size and margin you like, then add the Readability bookmarklet. You will get what you've set when you visit a webpage and click the bookmarklet.

GraphPaper Printer
ch.com/graphpaper/

Learn Typing
http://www.typingweb.com/tutor/lesson/index/id/316/#

Thumbalizr, capture a top screen or full scrolling webpage in seconds—just enter an URL, click thumb it, and download the image in width of your choice. Free sign up for even better quality.

Block Posters, create a large-size poster from a small-size image for printing in three simple steps: upload an image, slice it and download the pdf file. You can then print and assemble the pages into a big poster.

Ideone, a handy compiler and debugging tool in more than 40 programming languages—choose one of them, paste your source code, share it, or run it and see the results.

Scrim converts your email address into a short and safe link (for instance http://scr.im/joe) so that you can share it on the web to avoid spam robots and get less spam.

Academic Earth lets you watch up to 1,500 lectures, on everything from computer studies and psychology to medicine, architecture and entrepreneurship from respected educational institutions such as MIT, Harvard, Princeton and Yale.

TypingWeb, a place to learn, practice and improve your typing speed and accuracy on beginner to advanced and specialty courses. You can track your progress if you opt for registration which is free.

Incompetech, do you ever buy lined paper, graph paper, music notation paper, or score sheets for popular games and sports? If so, how about printing your own? Check out this generator that allows for some fine adjustments before you print it

Reseting Console Password in Weblogic 9.2.1

2010-09-14T08:04:00.000-07:00

Step 1: Backup the Domain
Step 2: Delete $DOMAIN_DIR\security\DefaultAuthenticatorInit.ldift
Step 3: Run the command setDomainEnv.cmd
Step 4: Run the Java command:
java weblogic.security.utils.AdminAccount

<$DOMAIN_DIR\security>
Step 5: Delete the contents inside the file [boot.properties] under $DOMAIN_DIR\servers\

security and add the folllowing contents.
username=

password=

Step 6: Important Step: Delete the folder: $DOMAIN_DIR\servers

\data\ldap
Step 7: Restart Weblogic Server, go to http://localhost:7001/console and login with your new username and password.

Dos programming

2010-07-21T12:26:00.001-07:00

http://www.allenware.com/icsw/icsw090.htm

Images for WebDesigners

2010-06-27T02:26:00.000-07:00

Common MySQL Queries

2010-02-20T15:38:00.000-08:00

Many reciepies about common sql queries
http://www.artfulsoftware.com/infotree/queries.php?&bw=1081#532

Log analyzer

2010-01-05T01:47:00.000-08:00

Insight is a log analyzer and has the following features.

Support for loggers
Handling Log Events
Remote Logs

http://mindtreeinsight.sourceforge.net/

process managers

2009-11-16T14:48:00.000-08:00

YAPM is a nice Process manager. you can see its screenshots from

http://yaprocmon.sourceforge.net/features.html

another PM is below. it shows processes in a tree.
http://processhacker.sourceforge.net/

Configuring proxy settings for Java

2009-09-25T00:34:00.000-07:00

You can tell java to use your proxy internet explorer proxy setting by following the steps below.

"Start the Java Plug-in Control Panel by following these instructions:

Click the Start menu
Select Settings
Select Control Panel
Double click the Java icon.
Click on the Network Settings button.
Select the Use Browser Settings checkbox.
Click the OK button to save your changes.
Close all browser windows. Restart the browser and try to load the applet.
If the applet still does not load and you see the same connection error, try to configure your web browser's proxy settings."

source:http://www.java.com/en/download/help/5000020600.xml

java libraries

2009-09-23T07:31:00.000-07:00

http://proguard.sourceforge.net/
ProGuard is a free Java class file shrinker, optimizer, obfuscator, and preverifier. It detects and removes unused classes, fields, methods, and attributes. It optimizes bytecode and removes unused instructions. It renames the remaining classes, fields, and methods using short meaningless names. Finally, it preverifies the processed code for Java 6 or for Java Micro Edition.

http://code.google.com/p/pulpcore/
http://www.interactivepulp.com/pulpcore/
PulpCore is an easy-to-use API designed to create modern-looking 2D web games with a positive user experience.

http://processing.org/
Processing is an open source programming language and environment for people who want to program images, animation, and interactions. It is used by students, artists, designers, researchers, and hobbyists for learning, prototyping, and production. It is created to teach fundamentals of computer programming within a visual context and to serve as a software sketchbook and professional production tool. Processing is an alternative to proprietary software tools in the same domain.

https://scenegraph.dev.java.net/
Welcome to the Scene Graph project, which provides "scene graph" functionality at the Java level, as well as providing one of the important runtime elements that the JavaFX Script language depends upon from the underlying platform.

http://www.13thmonkey.org/~boris/jgame/

http://slick.cokeandcode.com/

http://www.jmonkeyengine.com

Selenium web user interface tester

2009-06-04T23:55:00.000-07:00

"Many, perhaps most, software applications today are written as web-based applications to be run in an Internet browser. The effectiveness of testing these applications varies widely among companies and organizations. In an era of continuously improving software processes, such as eXtreme programming (XP) and Agile, it can be argued that disciplined testing and quality assurance practices are still underdeveloped in many organizations. Software testing is often conducted manually.... "

http://seleniumhq.org/

Seeing the world from different perspectives

2009-04-14T01:15:00.001-07:00

"When the only tool, you own is a hammer, you tend to see every problem as a nail".

Abraham Harold Maslow
American psychologist
1908 - 1970

Java Decompiler

2009-02-19T02:25:00.000-08:00

You sometimes do not have to sourcecode of an application which you want to analyse in that worst case story you can use java decompiler to analyse a code which is already compiled.

http://java.decompiler.free.fr/

Analysing a legacy source code

2009-02-06T07:50:00.000-08:00

Your development environment on windows with ubuntu

2009-01-29T01:42:00.000-08:00

You can download ubuntu server image from http://www.thoughtpolice.co.uk/vmware/
and download VM Plyer (you donot need VM server) http://www.vmware.com/download/player/download.html

start console setup to change the keyboard layout by using
sudo dpkg-reconfigure console-setup command

add a new user
sudo adduser

add the user to the sudoers file.
ALL=(ALL) ALL

remove system beeps
sudo rmmod pcspkr

Extracting text with sed

2009-01-09T16:49:00.000-08:00

Download stock ticker from stockcharts.com

wget http://stockcharts.com/charts/catalog/Aa.html

Extract the ticker with the following command.

sed -n 's/.*A HREF=".*c=$[^"]*$,p".*/\1/p' Aa.html > Aa.txt

DrillDown feature in JasperServer

2008-12-04T04:18:00.001-08:00

Add a hyperlink having type ReportExecution with parameter _report="sdfsdf"

Granting access from any IP on Mysql

2008-11-14T00:38:00.000-08:00

mysql> grant all privileges on *.* to youruser@"%" identified by "yourpassword";
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

mysql> exit
Bye

TCP Monitoring

2008-08-21T04:07:00.001-07:00

A nice TCP Monitoring application. You can download the debugger from http://www.itsamples.com/software/tcp.html

Datamodeling tool

2008-08-19T00:57:00.001-07:00

"Toad Data Modeller" is a very nice ER tool. you can generate SQL scripts as well to generate your database.

Opensource Project Management tool

2008-08-13T05:25:00.001-07:00

openproj is an opensource project management tool. It has most of the MSProject features at no cost.

Another opensource project management system is gnome planner.

Another project management tool is openworkbench.

Business Growth

2008-07-30T06:42:00.001-07:00

Source: Success in Store: How to Start Or Buy a Retail Business, Enjoy Running It ... by Heard and Woolf.

Open Source Content Management Software

2008-07-24T06:33:00.001-07:00

Liferay is an opensource content management software with portlet feature.

DEBUGGING YOUR SQLs WITH A JDBC DRIVER

2008-07-20T13:17:00.001-07:00

Download the SQL Spy from http://sozlux.org/download/p6spy-install.zip.
Extract the file and copy the spy.properties and spy.jar files to your TOMCAT_HOME/lib directory.
Edit spy.properties directory and change the real driver to your original driver on the following line

realdriver=com.mysql.jdbc.Driver

Edit your connection pool settings and use now this driver as your jdbc driver

com.p6spy.engine.spy.P6SpyDriver

How to search and replace text in big files

2008-07-18T04:46:00.001-07:00

you can also use sed. I used the following command

perl -pi -w -e 's/search/replace/g;' *.sql
-e means execute the following line of code.
-i means edit in-place
-w write warnings
-p loop

for example you can convert oracle dates to mysql in the following way

Free alternatives to TOAD

2008-07-18T03:07:00.001-07:00

If you are using simple SQL functions you do not need to pay full TOAD license to use the ORACLE database. You can find alternatives to toad below :

TOra

from http://tora.sourceforge.net/

TOra has also have a nice exporter. If you want to develop applications at home where you can not install a complete oracle, you can export your tables in tora and import them in e.g. mysql

dbVisualizer

from http://www.minq.se

TADO

from http://tado.sourceforge.net/

Squirrel SQL Client

from http://squirrel-sql.sourceforge.net/

Preparing a JAVA development environment

2008-07-16T03:17:00.001-07:00

Install 7-zip from http://www.7-zip.org/download.html
Install pspad from http://www.pspad.com/de/
Download and install JDK 5+ (make sure your JAVA_HOME environment variable points to the JDK, not a JRE). URL: http://java.sun.com/javase/downloads/index.jsp
For your local environment - download and install MySQL 5.x. ( we will use a central instance later). URL : http://dev.mysql.com/downloads/mysql/5.0.html#downloads
Set the root password as an empty string by using the following command: mysql --user=root --pass='' mysql -e "update user set password=password('newpw') where user='root'; flush privileges;"
Download and install eclipse EE from http://www.eclipse.org
Download Maven 2.0.5+ from http://maven.apache.org/download.html . Unzip the maven to your home directory and use the following configuration to install the maven.

Download and unzip tomcat and configure the following environment variables.

SQLite

2008-04-29T04:09:00.000-07:00

Click To Play

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.

SQLite is the most widely deployed SQL database engine in the world. It is used in countless desktop computer applications as well as consumer electronic devices including cellphones, PDAs, and MP3 players. The source code for SQLite is in the public domain. [1]

Cordinating the offshore team activities with Screenstream

2008-04-28T04:22:00.000-07:00

Click to play

ScreenStream lets others 'watch' your screen on their computers over the network or the internet. It is the modern equivalent of the overhead projector. When you turn on screen sharing others on your network (or even the internet) can view what is on your screen by typing the link (and optional access code) into their internet browser. They can continue to watch your screen until turn off screen sharing.[1]

[1] http://www.nchsoftware.com/screen/index.html

This video is prepared by Koray Güclü

http://www.korayguclu.de

Web Debugging with Fiddler

2008-04-28T04:19:00.000-07:00

Click to play

Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and "fiddle" with incoming or outgoing data. [1]

[1] http://www.fiddler2.com/fiddler2/

The video is prepared by Koray Güclü

http://www.korayguclu.de