From: Venkat Bagam <bagam_venkat@...>
Date: 2008-02-27T17:16:12+09:00
Subject: Multithreading problem

Hi All,

           I am pretty much a starter in multi-threading. In one of my
application, I needed to run three threads along each other. Here is my
code

require 'rubygems'
require 'mechanize'
require 'fileutils'
require 'timeout'

agent = WWW::Mechanize.new

start_time = Time.now
threads = []

  threads << Thread.new do
                puts "running thread1"
                start = 0
    count = 10
    finish = 30
    while start < finish
      page_links = Array.new
      parent_url = "http://www.rknowsys.com"
      page = agent.get(parent_url)
      page = nil
      start += count
    end
    puts "thread1 completed" if start == finish
  end

  threads << Thread.new do
    puts "running thread2"
    start = 30
    count = 10
    finish = 60
    while start < finish
      page_links = Array.new
      parent_url = "http://www.rknowsys.com"
      page = agent.get(parent_url)
      page = nil
      start += count
      raise "stopped bcaz start > 40" if start > 40
    end
    puts "thread2 completed" if start == finish
  end

  threads.each do |thread|
    begin
      thread.join
    rescue RuntimeError => e
      puts e.message
    end
  end

end_time = Time.now
interval = end_time - start_time
puts interval

the above code prints the error message, at the time of each thread join
and stops.
But, How do I deal with such a scenario that the thread2 continues to
run again setting its local variable start = 30 ?

Any help appreciated.

regards,
Venkat Bagam
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