remq-rb

A Ruby client for Remq, a Redis-based protocol for building fast, durable message queues.

WARNING: In early-stage development, API not stable. If you've used a previous version, you'll most likely have to clear all previously published messages in order to upgrade to the latest version.

Installation

gem install remq

Usage

Producer:

require 'json'
require 'remq'

$remq = Remq.new

message = { event: 'signup', account_id: 694 }

id = $remq.publish('events.accounts', JSON.dump(message))

Consumer:

require 'json'
require 'remq'

$remq = Remq.new

last_id_key = $remq.key('cursor', 'consumer-1')
last_id = $remq.redis.get(last_id_key) || 0

$remq.subscribe('events.*', from_id: last_id) do |channel, message|
  last_id = message.id

  # by persisting the last_id every 10 messages, a maximum of
  # 10 messages will be replayed in the case of consumer failure
  if last_id % 10 == 0
    $remq.redis.set(last_id_key, last_id)
  end

  message.body = JSON.parse(message.body)

  puts "Received message on '#{channel}' with id: #{message.id}"
  puts "Account signed up with id: #{message.body['account_id']}"
end

Flush:

# TODO: not implemented yet

License

(The MIT License)

Copyright © 2013 Evan Owen <[email protected]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.