Trinidad Worker Extension

Background Workers for Trinidad running as background (daemon) threads along side your Rack/Rails deployed application.

Built upon https://github.com/kares/jruby-rack-worker thus supports popular worker libraries such as Resque and Delayed::Job.

Install

Along with Trinidad in your application's Gemfile :

  group :server do
    platform :jruby do
      gem 'trinidad', :require => false
      gem 'trinidad_worker_extension', :require => false
    end
  end

$ bundle

Or install it yourself as a plain old gem :

$ gem install trinidad_worker_extension

Configure

Like all extensions set it up in the configuration file (e.g. trinidad.yml).

NOTE: The extension will not be configuring workers threads to start when running in rackup mode (e.g. rails s) because it expects JRuby-Rack to be not loaded in the embedded mode. Running Trinidad using rackup is mostly suitable for development/testing thus this is not seen as a limitation (simply start trinidad -e staging to check whether your workers are doing fine).

Delayed::Job

---
  # ...
  extensions:
    worker:
      delayed_job:
        # all settings here are optional
        thread_count: 1
        thread_priority: NORM
        # DJ specifics (optional as well) :
        QUEUE: mailers,tasks
        READ_AHEAD: 3 # default 5
        SLEEP_DELAY: 2.5 # default 5
        #MIN_PRIORITY: 1
        #MAX_PRIORITY: 5

The following start script will be executed in each Thread http://git.io/yLSgLA

Resque

Trinidad.configure do |config|
  config[:extensions] = {
    :worker =>
      :resque => {
        :thread_priority => 4, # bit bellow NORM (5)
        'QUEUES' => ['*'],
        'INTERVAL' => 2.5, # default is 5.0
        'LOGGING' => 'info',
        #'VERBOSE' => true, # verbose logging (info)
        #'VVERBOSE' => true, # very_verbose logging (debug)
      }
  }
end

The following start script will be executed in each Thread http://git.io/XglTpw

Custom Worker

---
  # ...
  extensions:
    worker:
      custom:
        #script: require 'my_worker'; MyWorker.start
        script_path: "lib/my_worker/start_worker.rb"
        # all settings here are optional
        #thread_count: 1
        #thread_priority: NORM

If you'd like to specify custom parameters you can do so within the configuration file or the deployment descriptor as context init parameters or as java system properties, use the following code to obtain them in your code :

require 'jruby/rack/worker/env'
env = JRuby::Rack::Worker::ENV

worker = MyWorker.new
worker.queues = (env['QUEUES']).split(',')
# ...

Copyright

Copyright (c) 2013 Karol Bucek. See LICENSE (http://en.wikipedia.org/wiki/MIT_License) for details.