From: saurabh purnaye <saurabh.purnaye@...>
Date: 2008-08-14T14:09:42+09:00
Subject: Re: Multithreading in ruby

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Threads and ProcessesMultithreading

Often the simplest way to do two things at once is by using *Ruby threads*.
These are totally in-process, implemented within the Ruby interpreter. That
makes the Ruby threads completely portable---there is no reliance on the
operating system---but you don't get certain benefits from having native
threads. You may experience thread starvation (that's where a low-priority
thread doesn't get a chance to run). If you manage to get your
threadsdeadlocked, the whole process may grind to a halt. And if some
thread happens to make a call to the operating system that takes a long time
to complete, all threads will hang until the interpreter gets control back.
However, don't let these potential problems put you off---Ruby threads are a
lightweight and efficient way to achieve parallelism in your code. Creating
Ruby Threads

Creating a new thread is pretty straightforward. Here's a simple code
fragment that downloads a set of Web pages in parallel. For each request
it's given, the code creates a separate thread that handles the HTTP
transaction.

  require 'net/http'


pages = %w( www.rubycentral.com
            www.awl.com
            www.pragmaticprogrammer.com
           )

threads = []


for page in pages
  threads << Thread.new(page) { |myPage|


    h = Net::HTTP.new(myPage, 80)
    puts "Fetching: #{myPage}"
    resp, data = h.get('/', nil )
    puts "Got #{myPage}:  #{resp.message}"
  }
end

threads.each { |aThread|  aThread.join }

  *produces:*

Fetching: www.rubycentral.com
Fetching: www.awl.com
Fetching: www.pragmaticprogrammer.com
Got www.rubycentral.com:  OK
Got www.pragmaticprogrammer.com:  OK
Got www.awl.com:  OK

You may see the book came with installation of ruby, in /ruby/doc folder

On Thu, Aug 14, 2008 at 10:29 AM, Kaja Mohaideen <
kajamohaideen_2003@yahoo.co.in> wrote:

> We people are new team for ruby. we trying to pput multithreading in our
> code. how is it possible? we want to read a message from queue and
> process that message parellaly and finally insert the message to the DB.
> Can you give  me the Idea please
>
> Regards
> Kaja Mohaideen.A
> Trichy
> --
> Posted via http://www.ruby-forum.com/.
>
>


-- 
--
Thanks and Regards
Saurabh Purnaye
+91-9922907342
skype: sorab_pune
yahoo & gtalk: saurabh.purnaye
msn: psaurabh@live.com

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