Class: Creeper::Processor

Inherits:
Object
  • Object
show all
Includes:
Celluloid, Util
Defined in:
lib/creeper/processor.rb

Overview

The Processor receives a message from the Manager and actually processes it. It instantiates the worker, runs the middleware chain and then calls Creeper::Worker#perform.

Constant Summary

Constants included from Util

Util::EXPIRY

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

#beanstalk, #constantize, #logger, #process_id, #redis, #watchdog

Methods included from ExceptionHandler

#handle_exception

Constructor Details

#initialize(boss) ⇒ Processor

Returns a new instance of Processor.



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# File 'lib/creeper/processor.rb', line 29

def initialize(boss)
  @boss = boss
end

Class Method Details

.default_middleware ⇒ Object 



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# File 'lib/creeper/processor.rb', line 20

def self.default_middleware
  Middleware::Chain.new do |m|
    m.add Middleware::Server::Logging
    m.add Middleware::Server::RetryJobs
    m.add Middleware::Server::ActiveRecord
    m.add Middleware::Server::Timeout
  end
end

Instance Method Details

#inspect ⇒ Object

See github.com/tarcieri/celluloid/issues/22



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# File 'lib/creeper/processor.rb', line 57

def inspect
  "#<Processor #{to_s}>"
end

#process(msgstr, queue, job, conn) ⇒ Object 



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# File 'lib/creeper/processor.rb', line 33

def process(msgstr, queue, job, conn)
  msg     = Creeper.load_json(msgstr) rescue msgstr
  klass   = Creeper.job_descriptions[queue]
  klass ||= constantize(msg['class'])
  worker  = klass.new

  stats(worker, msg, queue) do
    Creeper.server_middleware.invoke(worker, msg, queue, job, conn) do
      args   = msg['args']
      args ||= [msg]
      worker.perform(*cloned(args))
    end
  end
  job.delete rescue nil
  @boss.processor_done!(current_actor)
rescue => ex
  job.bury rescue nil
  handle_exception(ex, msg || { :message => msgstr })
  raise
ensure
  conn.close rescue nil
end

#to_s ⇒ Object 



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# File 'lib/creeper/processor.rb', line 61

def to_s
  @str ||= "#{hostname}:#{process_id}-#{Thread.current.object_id}:default"
end