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
Constants
TimeoutError
=
Timeout::Error
Another name for Timeout::Error, defined for backwards compatibility with earlier versions of timeout.rb.
Public Instance methods
Identical to:
Timeout::timeout(n, e, &block).
Defined for backwards compatibility with earlier versions of timeout.rb, see Timeout#timeout.
# 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.
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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