Q
Q is a lightweight promise implementation in Ruby.
DON'T USE ME! This project doesn't follow any promises spec. It's all wrong.
Installation
Add this line to your application's Gemfile:
gem 'q-defer', require: 'q'
And then execute:
$ bundle
Or install it yourself as:
$ gem install q-defer
Usage
Defer a single block:
require "open-uri"
Q.defer do |defer|
Thread.new do
response = open("http://www.example.com")
if response.status[0] == "200"
defer.resolve(response)
else
defer.reject([response.status, response])
end
end
end.then do |result|
puts "ok"
end.fail do |err, result|
puts "status code: #{err[0]}"
end.always do
puts "All finished!"
endDefer multiple blocks:
def defer_open(url)
Q.defer do |defer|
Thread.new do
response = open("http://www.example.com")
if response.status[0] == "200"
defer.resolve(response)
else
defer.reject([response.status, response])
end
end
end
end
Q.when([
defer_open("http://www.example.com"),
defer_open("http://www.google.com")
]).then do |results|
puts "All successful!"
end.fail do |err, results|
puts "Error: #{err}"
end.always do |results|
puts "All successful or one failure."
endContributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request