Class: Hare::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/hare/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/hare/runner.rb', line 12

def initialize(argv)
  @argv = argv

  @options = {
    :logging => false,
    :publish => false,
    :amqp => {
      :host => 'localhost',
      :port => nil,
      :exchange => {
        :name => nil,
        :kind => :topic,
      },
      :queue => '',
      :vhost => '/',
      :via_ssl => false,
      :ssl_cert => nil,
      :ssl_key => nil,
      :ssl_verify => false
    }
  }

  parse!
end

Instance Attribute Details

#arguments ⇒ Object

Returns the value of attribute arguments.



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# File 'lib/hare/runner.rb', line 10

def arguments
  @arguments
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/hare/runner.rb', line 9

def options
  @options
end

Instance Method Details

#parse! ⇒ Object 



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# File 'lib/hare/runner.rb', line 105

def parse!
  parser.parse! @argv
  @arguments = @argv
end

#parser ⇒ Object 



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# File 'lib/hare/runner.rb', line 37

def parser
  @parser ||= OptionParser.new do |opts|
    opts.banner = "Usage: hare [options] [MSG]"

    opts.separator ""
    opts.separator "Common Options:"
    opts.on("-h", "--host HOST", "The AMQP server host") {
      |host| @options[:amqp][:host] = host
    }
    opts.on("-p", "--port PORT", "The AMQP server host port") {
      |port| @options[:amqp][:port] = port
    }
    opts.on("--vhost VHOST", "The AMQP vhost on which to connect") {
      |vhost| @options[:amqp][:vhost] = vhost
    }
    opts.on("--exchange_name EXCHANGE", "The name of the AMQP exchange on which to connect") {
      |exc| @options[:amqp][:exchange][:name] = exc
    }
    opts.on("--exchange_type TYPE", "The type of the AMQP exchange on which to connect") do |type|
      if ['topic', 'direct', 'fanout'].member? type
        @options[:amqp][:exchange][:kind] = type.to_sym
      else
        puts "Exchange type must be (topic|direct|fanout), not #{type}."
        exit 1
      end
    end
    opts.on("--username NAME", "The AMQP username.") {
      |u| @options[:amqp][:username] = u
    }
    opts.on("--password PSWD", "The AMQP password for the user given.") {
      |p| @options[:amqp][:password] = p
    }
    opts.on("--route_key KEY", "The key to route messages over.") {
      |k| @options[:amqp][:key] = k
    }
    opts.on("--logging", "Enable logging of AMQP interactions.") {
      @options[:logging] = true
    }
    opts.on("--ssl_cert CERT", "Path to SSL chain certificates") do |c|
      @options[:amqp][:ssl_cert] = c
    end
    opts.on("--ssl_key PRIVKEY", "Path to SSL private key") do |k|
      @options[:amqp][:ssl_key] = k
    end

    opts.separator ""
    opts.separator "Consumer Options: "
    opts.on("--queue QUEUE", "The queue on which to listen.") {
      |q| @options[:amqp][:queue] = q
    }

    opts.separator ""
    opts.separator "Producer Options: "
    opts.on("--producer", "Toggle to enable producing messages") {
      @options[:publish] = true
    }

    opts.separator ""
    opts.on_tail("--help", "Show this message.") do
      puts opts
      exit
    end
    opts.on_tail("-v", "--version", "Show version") {
      puts Hare::VERSION; exit
    }
  end
end

#run! ⇒ Object 



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# File 'lib/hare/runner.rb', line 110

def run!
  amqp = @options[:amqp]

  EventMachine.run do
    AMQP.connect(:host => amqp[:host], :port => amqp[:port], :vhost => amqp[:vhost],
      :username => amqp[:username], :password => amqp[:password], :ssl => {
        :cert_chain_file => amqp[:ssl_cert],
        :private_key_file => amqp[:ssl_key]
      },
      :on_tcp_connection_failure => Proc.new { |settings|
        puts "TCP Connection failure; details:\n\n#{settings.inspect}\n\n"; exit 1
      },
      :on_possible_authentication_failure => Proc.new { |settings|
        puts "Authentication failure, I'm afraid:\n\n#{settings.inspect}\n\n"; exit 1
      }) do |connection|

      channel  = AMQP::Channel.new(connection)
      case amqp[:exchange][:kind]
      when :direct
        exchange = channel.direct(amqp[:exchange][:name])
      when :fanout
        exchange = channel.fanout(amqp[:exchange][:name])
      when :topic
        exchange = channel.topic(amqp[:exchange][:name])
      end

      if @options[:publish]
        exchange.publish(@arguments[0], :routing_key => amqp[:key]) do
          connection.disconnect { EM.stop }
        end
      else
        channel.queue(amqp[:queue]).bind(exchange, :key => amqp[:key]).subscribe do |payload|
          puts payload
        end
      end

    end
  end # EM
end