Description
A thin wrapper for begin + rescue + sleep + retry.
Installation
gem install attempt
Synopsis
require 'attempt'
# Attempt to ftp to some host, trying 3 times with 30 seconds between
# attempts before finally raising an error.
#
attempt(3, 30){
Net::FTP.open(host, user, passwd){ ... }
}
# Or, do things the long way...
code = Attempt.new{ |a|
a.tries = 3
a.interval = 30
}
code.attempt{
Net::FTP.open(host, user, passwd){ ... }
}
Known Bugs
None that I'm aware of. If you find any bugs, please log them on the
project page at:
https://github.com/djberg96/attempt
Caveats
Use with caution. Specifically, make sure you aren't inadvertantly
wrapping code that already performs sleep + retry. Otherwise, you'll
end up with a series of nested retry's that could take much longer to
work than you expect.
Also, this library uses the timeout library internally, which has some
known issues. See Future Plans, below.
As of version 0.3.0, this library requires structured_warnings 0.3.0 or
later. This is necessary because of changes in Ruby 2.4.
Future Plans
Add the ability to set an absolute maximum number of seconds to prevent
nested sleep/retry from delaying attempts longer than expected.
Replace the timeout library with a self selecting pipe if possible.
Acknowledgements
This library is partially based on Mark Fowler's 'Attempt' Perl module.
Warranty
This package is provided "as is" and without any express or
implied warranties, including, without limitation, the implied
warranties of merchantability and fitness for a particular purpose.
License
Artistic 2.0
Copyright
(C) 2006-2017, Daniel J. Berger
All Rights Reserved
Author
Daniel J. Berger