Exceptional Ruby

Presenter: Avdi Grimm

• Nested exceptions: good for gems!
• Circuit Breaker pattern
• Sinatra: last_modified
• Hash#fetch raising an exception
• might_be_nil or fail "Blah"
• begin as a code smell... do outdent rescue/ensure instead
• make a "contingency method" with_io_handling { do it }

Maybe wrap your exceptions:

module Mylib::Error; end
rescue Eception => e
  e.extend Mylib::Error
end

• UserError, LogicError, TransientError

• Book code: RUBYCONF2011

• avdi.org/devblog/exeption-ruby