Problem / Error

configure: error: No curses library functions found

Solution

apt-get install libncurses5-dev

How to install Ejabberd

http://sysmonblog.co.uk/2008/06/ot-installing-ejabberd-on-debian-ubuntu.html

https://wiki.basho.com/display/RIAK/Installing+Erlang#InstallingErlang-MacPorts 

Compiling Ejabberd on Ubuntu

http://ciarang.com/posts/compiling-ejabberd-on-ubuntu

How to install Erlang on Snow Leopard

http://sysmonblog.co.uk/2008/06/ot-installing-ejabberd-on-debian-ubuntu.html

http://jboxer.com/2010/01/installing-erlang-on-snow-leopard/

http://ndpar.blogspot.com/2010/02/installing-ejabberd-on-ubuntu.html

How to setup Hostname for local network?
You gonna need to edit your “host” file.
Mac / Linux

sudo nano /etc/hosts/

Windows

Notepad C:\WINDOWS\System32\drivers\etc\hosts

You can match IP and Hostname whatever you like and then can be call with Hostname in future.

192.168.1.36 call.me

Way 1 : Use debian packages but I found myself start-up problems. If you still want to try, follow the steps..

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install ejabberd

Click here to learn more

Way 2 : Compile source code yourself. It won’t really difficult if you follow this post.

How to uninstall Ejabberd?

sudo apt-get remove --purge ejabberd

How to log-in as root or how to switch to root user in Terminal?

sudo bash

Don’t forget that you must be a sudo user to do that command.

Extra Resources

• XMPP is the technology behind real-time messaging application Jabber
• List of XMPP open-sourced servers are here.
• Among several servers, eJabberd and Openfire are popular.
• XMPP client libraries are here along with PHP.
• Javascript client libraries for XMPP are here and Strophe and js.io are popular choices.

SQLstream kind of technique that enhances traditional query to support real-time very dynamic data such as chat logs from Database.

In a traditional RDBMS, all data must be stored first, and then queried. RDBMS queries are reactive and finite – in the example query above, a traditional database would return all of the New York orders currently stored and then terminate. A RAM query is a standing query – it executes continuously, processing data before it is stored in an RDBMS, publishing analysis and results immediately. Read More for Details

How to implement COMET with PHP

http://www.zeitoun.net/articles/comet_and_php/start

Comet story (part 1+2+3)

http://www.demo.codesetter.com/comet-whiteboard-0

http://www.demo.codesetter.com/comet-whiteboard-1

http://www.demo.codesetter.com/comet-whiteboard-2

Starting Out With Comet (Orbited) Part 1+2+3 – The Client

http://thingsilearned.com/2009/06/09/starting-out-with-comet-orbited-part-1/

http://thingsilearned.com/2009/06/25/starting-out-with-comet-orbited-part-2-installation-and-stomp/

http://thingsilearned.com/2009/08/03/starting-out-with-comet-orbited-part-3-%E2%80%93-the-client/

http://redivide.com/blog/setting-up-a-name-based-virtual-host-vhost/

cat /etc/issue

Let me introduce my game first. What is RPS? RPS stands for Rock-Paper-Scissors. Yes RPS game but with social networking concept. In short, two players has 16 pieces including 4 rocks, 4 papers, 4 scissors, 3 bombs and 1 flag. Whoever got opponent’s flag will be the winner. During game play, rock beats scissors, scissors beats paper and paper beats rock. However, bomb will kill any item it encounters. That’s the brief of how RPS Game is evolved. In future dev, social activity will be included but I’m not going to cover it right now. So let’s forward to my title.

The project I’m expecting to be one of the most successful games in Facebook is started and developed. But after continuous development in 15 days, I found out it was a failure. Why?

Because the first reason is Purely used with PHP (Codeigniter), MySQl and Javascript (jQuery). As far as I have done, there is no real-time connection between two players. Every movement is recorded in MySQL and another player is calling a PHP function with Ajax every 2 seconds to know whether his opponent has moved yet. That PHP function is querying whenever it’s called. Let’s think about 100 players are playing this game and 50 players are calling that PHP function to knows their opponent moves. The server will be querying 50 times every 2 seconds. How ridiculous process is that! I don’t have to explain to you anymore about performance, reliability and optimization.

The second reason is client side script code. I used Javascript and jQuery for rendering board, position calculation and movements just right under the browser. So what’s a big deal? Have you ever heard of FireBug in Mozilla? Of course you must and that’s the tool can be used to mess around my application. Why? Because I grab the position of surrounding pieces and calculate the free square. So when a user change the ID of a piece before he makes a move, my script cannot know and just get the ID and start calculation. You can even save that invalid ID and can expect as you hack.

The third reason is my problem and not concern with the language. As to admit the truth, I’ve never started working with OOP style coding. I really need to adopt my knowledge and idea to suit with OOP but I still needed experience. So I just used procedural style in both PHP and javascript and it became one of the reasons of failure. I’m really wondered that Javascript has such a very good OOP support but I failed. Most of my code look so confusing and DIY is far away then galaxy.

I can try to fix 3rd reason and even 2nd problem with Javascript. Get calculated position from Server and just render in client. It’s simple to implement but the 1st problem is a headache.

PHP was not designed for this anyway because of the share nothing model. What should I do next? Is this the end? Wait! I just saw a dawn of light… Comet. Yes!

How to implement COMET with PHP

Comet is a programming technique that enables web servers to send data to the client without having any need for the client to request it. This technique will produce more responsive applications than classic AJAX. In classic AJAX applications, web browser (client) cannot be notified in real time that the server data model has changed. The user must create a request (for example by clicking on a link) or a periodic AJAX request must happen in order to get new data fro the server.

However, COMET was not a solution either. It won’t be efficient if you intended for several thousands of online players. Comet Story Part 1, Part 2 and Part 3 is one of my inspiration that introduced the term XMPP which I hope to be my only one solution. I’ll be writing about XMPP that I know in up coming post.

Have a great day with full of sunshine