Tuesday, August 16, 2011

Connect Rails and Redis

These days Redis is getting very popular because of its document style storage and high performance. It is a persistent in-memory key-value store written in C by Salvatore Sanfilippo. Redis is an open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.

When to use Redis :
  • You want to access the data very fast.
  • Your data set is not big and it can fit in available RAM
  • And your data is not very critical if it loose due to any failure 

Install redis:
Download and install from http://redis.io/download

Start Redis
Go to terminal and type :
By default it will run on port 6379

Connecting Redis with Rails 
Once Redis is installed and running follow these steps:
1.) Open gemfile
gem 'redis', '2.1.1'
2.) Then go to your application directory from terminal and execute:
bundle install
3.)Go to following directory /config/initializers/ and create a file redis.rb
4.) Write the following code in redis.rb
$redis = Redis.new(:host => 'localhost', :port => 6379)
By default redis run on 6379, if you are running on different port change this port attribute.

All configuration is completed and now you can use $redis global variable from your rails application.
Checking the connection :
Go to rails console and type following command
=> Redis client v2.1.1 connected to redis://localhost:6379/0 (Redis v2.2.2)

Some Redis Examples
> $redis.set("website","itsallaboutruby")
=> "OK"

Monday, August 1, 2011

Rhomobile Book

Finally My Book on Rhomobile has been publish with pactpub.

Now Its time to say Thanks.

I would like to express my gratitude to my family and friends especially Akshat Paul, Manu Singhal, and Anuj Bhargava who saw me through this book, who provided support, talked things over, read, wrote, offered comments, without which conceiving this book wouldn't have been possible.

Also, I would like to thank Sarah, Neha, Kartikey, Shubhanjan, and the PacktPub team who allowed me to quote their remarks and assisted in the editing, proofreading, and design. Writing a book was not my cup of tea but they made this complicated journey effortless.

Also I want to say big thanks to Reviewers:
Brian Moore :
Brian Moore is a Senior Engineer at Rhomobile, father of two, and quintessential hacker.
Brian began coding at the age of 12. His early love for everything technological led to a job with Apple shortly after high school. Since that time Brian has worked at a series of start-ups and tech companies taking on interesting technical challenges. Brian has become the
technical face of Rhomobile as he leads the Rhodes community in the latest Rhomobile innovation during the Friday webinars. When not guiding the next generation of Rhodes developers or hacking on a new debugger, Brian can be found climbing a hill in a remote Southern California desert in his baja bug.

Deepak Vora is a consultant and a principal member of the NuBean.com Software Company. Deepak is a Sun Certified Java Programmer and Web Component Developer, and has worked in the fields of XML and Java programming and J2EE for over five years. Deepak is the co-author of the Apress book Pro XML Development with Java Technology and was the technical reviewer for the O'Reilly book WebLogic: The Definitive Guide. Deepak was also the technical reviewer for the Course Technology PTR book Ruby Programming for the Absolute Beginner, and the technical editor for the Manning Publications book Prototype and Scriptaculous in Action. Deepak is also the author of the Packt Publishing book JDBC 4.0 and Oracle JDeveloper for J2EE Development, Processing XML documents with Oracle JDeveloper 11g, and EJB 3.0 Database Persistence with Oracle Fusion Middleware 11g.

Other contributors:

Acquisition Editor
  • Sarah Cullington
Development Editor
  • Neha Mallik
Technical Editors
  • Ajay Shanker
  • Mohd. Sahil
Project Coordinator
  • Shubhanjan Chatterjee
  • Linda Morris
  • Geetanjali Sawant
  • Melwyn D'Sa
Production Coordinator
  • Melwyn D'sa
  • Cover Work
  • Melwyn D'sa

This is the link to buy the book :Rhomobile Book