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RabbitMQ Ruby Example
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# an initializer | |
# gem install bunny | |
# written by: Tam Nguyen (twitter: @nguyentamvn) | |
require 'bunny' | |
require 'json' | |
class RabbitPublisher | |
def initialize(options = {}) | |
bunny_config = { | |
host: options[:host] || 'localhost', | |
user: options[:user], | |
pass: options[:pass], | |
heartbeat_interval: 8, | |
automatically_recover: true, | |
timeout: 7 | |
} | |
rabbit_connection = Bunny.new(bunny_config) | |
rabbit_connection.start | |
rabbit_channel = rabbit_connection.create_channel | |
self.channel = rabbit_channel | |
self.connection = rabbit_connection | |
end | |
def publish(options = {}) | |
queue_name = options[:queue_name] | |
message = options[:message] | |
if queue_name.nil? || queue_name.empty? | |
puts 'queue_name is missing' | |
return | |
end | |
queue = channel.queue(queue_name, durable: true) | |
begin | |
puts "Sending message..." | |
queue.publish(message.to_json, persistent: true) | |
rescue Exception => e | |
puts "[ERROR] #{e}" | |
close | |
end | |
end | |
def receive(options = {}) | |
queue_name = options[:queue_name] | |
if queue_name.nil? || queue_name.empty? | |
puts 'queue_name is missing' | |
return | |
end | |
puts "Waiting queue: #{queue_name}..." | |
channel.prefetch(1) | |
begin | |
queue = channel.queue(queue_name, durable: true) | |
queue.subscribe(manual_ack: true, block: true) do |delivery_info, _properties, body| | |
yield channel, delivery_info, body | |
end | |
rescue Exception => e | |
puts "[ERROR] #{e}" | |
close | |
end | |
end | |
def close | |
channel.close | |
connection.close | |
puts 'Closed rabbitmq connections.' | |
end | |
private | |
attr_accessor :channel | |
attr_accessor :connection | |
end | |
# how to use | |
# rabbit = RabbitPublisher.new | |
# for publishing messages | |
# rabbit.publish(queue_name: "twitter", message: { name: "tam nguyen" }) | |
# (1..10000).each {|i| rabbit.publish(queue_name: "twitter", message: { name: "tam nguyen #{i}" }); sleep 0.1 } | |
# for subscribing messages | |
# rabbit.receive(queue_name: 'twitter') do |channel, delivery_info, body| | |
# puts " [x] #{body}" | |
# channel.ack(delivery_info.delivery_tag) | |
# end | |
# should close connecttions whern completed tasks | |
# rabbit.close | |
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