Class: Telecaster

Inherits:
Object
  • Object
show all
Defined in:
lib/telecaster/multi.rb,
lib/telecaster.rb

Overview

This is Telecaster::Multi, not a multitelecaster.

Defined Under Namespace

Classes: Multi

Constant Summary collapse

ASYNC_RESPONSE = 
[-1, {}, []].freeze
DEFAULT_TIMEOUT = 
10
EMHTTP_VERSION = 
EM::HttpRequest::VERSION.split('.')[0].to_i
TYPE_JSON = 
'application/json'
ROOT = 
File.expand_path('..', __FILE__)

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Telecaster

Returns a new instance of Telecaster.



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# File 'lib/telecaster.rb', line 16

def initialize(options)
  @backend_hosts = options[:backends]
  @logger        = options[:logger]
  @timeout       = options[:timeout] || DEFAULT_TIMEOUT
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/telecaster.rb', line 29

def call(env)
  ensure_reactor_running
  
  start     = Time.now.to_f
  method    = env['REQUEST_METHOD'].downcase
  multi     = Multi.new
  callback  = env['async.callback']
  args      = create_args(env)
  
  @backend_hosts.each do |host|
    uri     = File.join(host, env['REQUEST_URI'])
    request = create_request(uri)
    
    multi.add(host, request.__send__(method, args))
  end
  
  multi.callback do |response|
    duration = ((Time.now.to_f - start) * 1000).round
    summary = response.map { |r| '[' + [r['host'], r['status'] || '-', r['duration'] || '-'] * ' ' + ']' }
    @logger.info "#{env['REQUEST_METHOD']} #{env['REQUEST_URI']} backends:#{response.size} duration:#{duration} #{summary * ' '}"
    
    json = Yajl::Encoder.encode(response, :pretty => true, :indent => '  ')
    callback.call [200, {'Content-Type' => TYPE_JSON}, [json]]
  end
  
  ASYNC_RESPONSE
  
rescue => e
  [500, {'Content-Type' => 'text/plain'}, [e.message]]
end

#listen(port) ⇒ Object 



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# File 'lib/telecaster.rb', line 22

def listen(port)
  app = self
  server = Thin::Server.new('0.0.0.0', port) { run app }
  server.timeout = 1.5 * @timeout
  server.start
end