timiout for ruby

timiout for ruby

timeout.rb

Path:
timeout.rb

Last update:
Tue May 25 13:04:11 -0700 2010

Ruby version:
Ruby 1.9.2

timeout.rb

execution timeout

Synopsis

  require 'timeout'
  status = Timeout::timeout(5) {
    # Something that should be interrupted if it takes too much time...
  }

Description

A way of performing a potentially long-running operation in a thread, and terminating it‘s execution if it hasn‘t finished by a fixed amount of time.

Previous versions of timeout didn‘t provide use a module for namespace. This version provides both Timeout.timeout , and a backwards-compatible timeout .

Copyright

Copyright:
(C) 2000 Network Applied Communication Laboratory, Inc.

Copyright:
(C) 2000 Information-technology Promotion Agency, Japan

Methods

timeout

Constants

TimeoutError
=
Timeout::Error
Another name for Timeout::Error , defined for backwards compatibility with earlier versions of timeout.rb.

Public Instance methods

timeout(n, e = nil, &block)

Identical to:

  Timeout::timeout(n, e, &block).

Defined for backwards compatibility with earlier versions of timeout.rb, see Timeout#timeout .

[Source]

# File timeout.rb, line 86
def timeout(n, e = nil, &block)
  Timeout::timeout(n, e, &block)
end

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Slash Dot Dash

Rolling on Rails

Ruby Tidbit: Timeout code execution

Just a small tip, if you wish to ensure a snippet of Ruby code doesn’t run for too long you can use the timeout function. You might want to do this when making a request to a remote server with net/http for example.

timeout.rb

A way of performing a potentially long-running operation in a thread, and terminating it‘s execution if it hasn‘t finished within fixed amount of time.

Here’s a quick example using the excellent rFeedParser (Universal Feed Parser in Ruby) to fetch an RSS feed.

require 'timeout'
require 'zlib'
require 'rubygems'
require 'rfeedparser'

fp = nil
begin
  # Don't take longer than 20 seconds to retrieve & parse an RSS feed
  Timeout::timeout(20) do
    fp = FeedParser.parse("http://feeds.feedburner.com/slashdotdash")
  end
rescue Timeout::Error
  # Too slow!!
end

About this entry

You’re currently reading “Ruby Tidbit: Timeout code execution,” an entry on Slash Dot Dash

Published: 02.15.08 / 12am Category: Ruby , Ruby on Rails Comments are closed Comments are currently closed on this entry. David Roussel 02.29.08 / 2pm

timeout is unsafe.

See http://headius.blogspot.com/2008/02/rubys-threadraise-threadkill-timeoutrb.html

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