Class: MicroQ::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/micro_q/cli.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.run ⇒ Object 



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# File 'lib/micro_q/cli.rb', line 6

def self.run
  @cli ||= new
  @cli.parse
  @cli.verify!
  @cli.setup
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/micro_q/cli.rb', line 13

def parse
  opts = Slop.parse do
    banner 'Usage: microq [options]'

    on 'h', 'This menu'
    on 'help', 'This menu'
    on 't=', 'The queue type to process [redis, sqs]'
    on 'type=', 'The queue type to process [redis, sqs]'
    on 'r=', 'The path to the rails application'
    on 'require=', 'The path to the rails application'
    on 'w=', 'The number of worker threads'
    on 'workers=', 'The number of worker threads'
  end

  (puts usage; exit) if opts[:help] || opts[:h]

  @workers = opts[:workers] || opts[:w]
  @require = opts[:require] || opts[:r] || 'config/environment.rb'
  @mode = (opts[:type] || opts[:t] || 'sqs'.tap { puts 'Defaulting to sqs type' }).downcase
end

#setup ⇒ Object 



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# File 'lib/micro_q/cli.rb', line 43

def setup
  puts 'Requiring rails application...'

  require 'rails'

  if File.directory?(@require)
    require File.expand_path("#{@require}/config/environment.rb")
  else
    require @require
  end

  Rails.application.eager_load!

  aws_keys = MicroQ.config.aws.try(:keys) || []

  queue = if @mode == 'sqs'
    raise 'SQS mode requires an aws :key and :secret see https://github.com/bnorton/micro_q/wiki/Named-Queues' unless aws_keys.include?(:key) && aws_keys.include?(:secret)

    MicroQ::Queue::Sqs
  elsif @mode == 'redis'
   puts 'Using redis config' + MicroQ.config.redis.map {|(k,v)| "#{k}=#{v}" }.join(' ')

    MicroQ::Queue::Redis
  else
    raise 'Only Redis and SQS mode are supported via the command line.'
  end

  MicroQ.configure do |config|
    config.queue = queue # set workers after assigning the queue since this sets workers=0 internally for the sqs queue
    config.workers = @workers.to_i if @workers
    config['worker_mode?'] = true
  end

  puts "Running micro_q in #{@mode.upcase} mode with #{MicroQ.config.workers} workers..."
  puts 'ctl+c to shutdown...'
  MicroQ.start

  sleep
rescue Interrupt
  puts 'Exiting via interrupt'
  exit(1)
end

#usage ⇒ Object 



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# File 'lib/micro_q/cli.rb', line 86

def usage
  <<-USAGE
  Run microq with messages enqueued to and dequeued from SQS or Redis.
  Usage: microq [options]
-h, --help              This menu.
-t, --type [redis, sqs] The type of queue being utilized (either Redis or SQS)
-r, --require           The path the rails app's config/environment.rb file.
-w, --workers           The number of workers for this process.
  USAGE
end

#verify! ⇒ Object 



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# File 'lib/micro_q/cli.rb', line 34

def verify!
  unless File.exist?(@require) || File.exist?("#{@require}/config/application.rb")
    puts 'Typically the -r option is simply the base path of the application'
    puts 'This could be `pwd` or something special in production...'
    puts "We tried both File.exist?(opts[:require]) and File.exist?(opts[:require] + 'config/application.rb')"
    raise "MicroQ requires a valid rails application path via the -r option\n"
  end
end