Class: Roundhouse::Processor

Inherits:
Object
  • Object
show all
Includes:
Actor, Util
Defined in:
lib/roundhouse/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 Roundhouse::Worker#perform.

Constant Summary collapse

STATS_TIMEOUT =

To prevent a memory leak, ensure that stats expire. However, they should take up a minimal amount of storage so keep them around for a long time

24 * 60 * 60 * 365 * 5

Constants included from Util

Util::EXPIRY

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Actor

included

Methods included from Util

#fire_event, #hostname, #identity, #logger, #process_nonce, #redis, #want_a_hertz_donut?, #watchdog

Methods included from ExceptionHandler

#handle_exception

Constructor Details

#initialize(boss) ⇒ Processor

Returns a new instance of Processor.



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# File 'lib/roundhouse/processor.rb', line 34

def initialize(boss)
  @boss = boss
end

Instance Attribute Details

#proxy_id ⇒ Object

Returns the value of attribute proxy_id.



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# File 'lib/roundhouse/processor.rb', line 32

def proxy_id
  @proxy_id
end

Class Method Details

.default_middleware ⇒ Object 



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# File 'lib/roundhouse/processor.rb', line 21

def self.default_middleware
  Middleware::Chain.new do |m|
    m.add Middleware::Server::Logging
    m.add Middleware::Server::RetryJobs
    if defined?(::ActiveRecord::Base)
      require 'roundhouse/middleware/server/active_record'
      m.add Roundhouse::Middleware::Server::ActiveRecord
    end
  end
end

Instance Method Details

#execute_job(worker, cloned_args) ⇒ Object 



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# File 'lib/roundhouse/processor.rb', line 77

def execute_job(worker, cloned_args)
  worker.perform(*cloned_args)
end

#inspect ⇒ Object 



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# File 'lib/roundhouse/processor.rb', line 73

def inspect
  "<Processor##{object_id.to_s(16)}>"
end

#process(work) ⇒ Object 



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# File 'lib/roundhouse/processor.rb', line 38

def process(work)
  msgstr = work.message
  queue = work.queue_id

  @boss.async.real_thread(proxy_id, Thread.current)

  ack = true
  begin
    msg = Roundhouse.load_json(msgstr)
    klass  = msg['class'].constantize
    worker = klass.new
    worker.jid = msg['jid']

    stats(worker, msg, queue) do
      Roundhouse.server_middleware.invoke(worker, msg, queue) do
        execute_job(worker, cloned(msg['args']))
      end
    end
  rescue Roundhouse::Shutdown
    # Had to force kill this job because it didn't finish
    # within the timeout.  Don't acknowledge the work since
    # we didn't properly finish it.
    ack = false
  rescue Exception => ex
    handle_exception(ex, msg || { :message => msgstr })
    raise
  ensure
    # Put the queue back into rotation
    Roundhouse.redis { |conn| Roundhouse::Monitor.push(conn, queue) }
    work.acknowledge if ack
  end

  @boss.async.processor_done(current_actor)
end