Developers Corner

New Blog

2009-03-08T13:42:00.000-07:00

This blog will move to http://www.milkshakesystems.com
starting from the mid of march

Installing drupal 6.6 ,PHP ,Apache and MySql on Windows

2008-11-19T23:28:00.000-08:00

In this tutorial ,I try to write exaclty the steps I passed through while installing Apache,MySql,PHP and druap for the first time on windows.

Download Apache web server from http://httpd.apache.org/download.cgi
,for this tutorial I downloaded version 2.2.10 Win32 Binary without crypto (no mod_ssl)
MSI Installer

Run the installer , during installation I kept the default settings, the installation folder is
"C:\Program Files\Apache Software Foundation\Apache2.2"

For the Network Domain,Server Name and Administrator's Email Address I entered localhost,localhost and admin@localhost respectively

Download and install MySql Community server from
http://dev.mysql.com/downloads/

Download and install MySql GUI Tools from
http://dev.mysql.com/downloads/gui-tools/5.0.html , although these tools are
not required but they make it easy to manage MySql Server

Download PHP from http://www.php.net/downloads.php
, for this tutorial I downloaded version 5.2.6 zip package

Extract the PHP zip file into folder c:\php

Add PHP folder to the system path
- Right click on My Computer
- Choose Advanced Tab
- Click on Environment Variables button
- From System variables , select Path
- Click Edit
- Add the folder where PHP is extracted (i.e. "c:\php") to the end of the Variable value
- The Path Variable might look something like %SystemRoot%\system32;%SystemRoot%;C:\Program
  Files\MySQL\MySQL Server 5.0\bin;C:\php

Restart your computer for the Path vaialbe to be reflected on the system

Go to PHP installation folder ("c:\php") ,make a copy of php.ini-recommended and rename it to php.ini

Edit php.ini
- Set max_execution_time = 300 (line 303) , the default value is 30 but some drupal actions take longer time
- Set display_errors = On (line 372), the default value is Off
- Set display_startup_errors = On (line 377), the default value is Off
- set extension_dir = ".\ext\" (line 536), this the folder where PHP extensions reside
- Uncomment the following lines by removing the semicolon at the begining of each line ,to enable the corresponding extensions
  - ;extension=php_gd2.dll (line 661)
  - ;extension=php_mbstring.dll (line 668)
  - ;extension=php_mysql.dll (line 675)
  - ;extension=php_mysqli.dll (line 676)

Edit httpd.conf found in "C:\Program Files\Apache Software Foundation\Apache2.2\conf"
- To change your WWW root folder change DocumentRoot value (line 177) to your WWW root folder e.g. DocumentRoot "C:/wwwroot"
- change <Directory "C:/Program Files/Apache Software Foundation/Apache2.2/htdocs"> (line 204) to <Directory "C:/wwwroot">
- To Enable mod rewrite
  - Uncomment the following line #LoadModule rewrite_module modules/mod_rewrite.so (line 116) by removing the hash at the begning of the line
  - inside tag <Directory "C:/wwwroot"> (line 204) , change AllowOverride None (line 224) to AllowOverride All
- To Enable PHP
  - Inside tag <IfModule dir_module> line (238) change DirectoryIndex index.html to DirectoryIndex index.php index.html so index.php will be regonized as a default file
  - at the end of the file add the following lines
    
    #Enable PHP 5.2.6
    
    LoadModule php5_module "C:/php/php5apache2_2.dll"
    
    AddType application/x-httpd-php .php
    
    # configure the path to php.ini
    
    PHPIniDir "C:/php"

Using MySql query browser create a new schema called "drupalDB"

Download Drupal 6.6 from Drupal Download

extract the downloaded file to c:\wwwroot\drupal

Go to drupal installation folder ("c:\wwwroot\drupal") ,make a copy of default.settings.php and rename it to settings.php

If settings.php is readonly make it writeable

Open your briwser and go the url http://localhost/drupal/ click make a new drupal installation and follow the wizard

That's it Done

Singleton pattern in a multi-threaded C# application

2008-07-02T23:23:00.000-07:00

This is piece of code will assure the creation of a single instance of the singleton class in a multi-threaded application and at the same time highly performing


    public class Singleton
    {
        private static Singleton _instance;
        private static readonly object syncObject = new object();

        public static Singleton instance
        {
            get
            {
                if (_instance == null)
                {
                    lock (syncObject)
                    {
                        if (_instance == null)
                            _instance = new Singleton();
                    }
                }
                return _instance;
            }
        }

    }

How my coding habits changed since 1990?

2008-03-30T08:36:00.000-07:00

I start writing code since 1990 when I was in high school , today 18 years later when I think how my coding habits changed, I found three major events that effected the way I write code:

Introduction of design patterns by GOF
Introduction of garbage collector in Java and I need no more to free allocated memory
Introduction of Test driven development

other than this I think the way I write code remain the same wither I code in Java, C# , Ruby or whatever else

Advantages of Offshore development in Egypt

2008-03-03T10:11:00.000-08:00

Egypt is a great place and I would like to point here to some advantages of doing offshore development in Egypt:

Large pool of technical skills
Egypt shares a time zone with many European countries, which make Egypt actually a near shore location
Egypt has a multilingual workforce
Familiarity with western culture

My .Net development ToolBox

2008-01-31T13:07:00.000-08:00

When I start developing .Net applications some years ago, most of the open source projects available today were beta and can't be used in real world applications so we had to develop a custom framework with lot of functionalities available today. but today its more feasible to use existing open source projects and currently my .Net toolbox consists mainly of the following open source projects:

NHibernate for ORM and data persistence
Log4Net for logging
NUnit for unit testing
Spring.Net for orchestrating the above modules and I mostly use Spring.Net Nhibernate integration and declarative transactions
MyGeneration for code generation and any routine tasks that requires code generation

Successful development environment

2008-01-19T11:10:00.000-08:00

Delivering successful software projects requires healthy software development environment. Among successful environments I have seen there are common practises independent of the methodology used, here I will try to summarize those point:

Have a clear standards for Design,Coding , Database, Unit Testing , Security, Source Control , UI Design and any aspects relevant to your environment.
Use software development framework
Break project into Independent tasks as much as possible
Minimize effort spend in maintaining UI and have clear separation between UI and business , poorly developed UI consume a lot of time maintaining it more then any other part of the application
Start with small team of senior developers then increase the size of the team
Use custom code generators for common task instead of copy and paste but make sure the generated code is maintainable
Avoid bad developers if you have them get rid of them immediately
Use ORM tools and minimize SQL statements
Avoid using heavy project management tools , use the simplest tools
Don't write documentation that no one will read
Don't let developers got bored in long projects otherwise they will leave

Books that influenced my software development career

2008-01-13T23:28:00.000-08:00

Last night I was thinking about IT books that influenced my software development career and was of great value to me, I came up with this list of 11 books and as you can see there are nearly no books about recent programming languages and software tools on the list because I do think that these are only tools and any developer with the basic knowledge will take him maximum a week or two to learn any new programming language or tool. And from my experience once you are good at C++ you will learn any programming language easily.
Here is the list:

Assembly Language Primer for the IBM PC & XT by Robert Lafore
The Waite Group's Object-Oriented Programming in C++ Robert Lafore
The Waite Group's C Programming Using Turbo C by Robert Lafore
Computer Networks by Andrew S. Tanenbaum
Modern Operating Systems by Andrew S. Tanenbaum
Extreme Programming Explained: Embrace Change by Kent Beck
Head First Design Patterns by Elisabeth Freeman , Eric Freeman, Bert Bates, Kathy Sierra
Design Patterns: Elements of Reusable Object-Oriented Software by Erich Gamma, Richard Helm, Ralph Johnson, and John M. Vlissides
Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and Iterative Development by Craig Larman
Patterns of Enterprise Application Architecture by Martin Fowler
Refactoring: Improving the Design of Existing Code by Martin Fowler, Kent Beck, John Brant, and William Opdyke