Pallets

# my_workflow.rb
require 'pallets'

class MyWorkflow < Pallets::Workflow
  task 'Foo'
  task 'Bar' => 'Foo'
  task 'Baz' => 'Foo'
  task 'Qux' => ['Bar', 'Baz']
end

class Foo < Pallets::Task
  def run
    puts 'I love Pallets! <3'
  end
end
# [other task definitions are ommited, for now]

MyWorkflow.new.run

Pallets.configure do |c|
  # How many workers to process incoming jobs?
  c.concurrency = 2

  c.backend = :redis
  c.serializer = :json

  c.backend_args = { db: 1 }

  # What's the maximum allowed time to process a job?
  c.job_timeout = 1800
  # How many times should a job be retried?
  c.max_failures = 3
end

# All workflows must subclass Pallets::Workflow
class WashClothes < Pallets::Workflow
  # The simplest task
  task BuyDetergent

  # Another task; since it has no dependencies, it will be executed in parallel
  # with BuyDetergent
  # TIP: Use a String argument when task is not _yet_ loaded
  task 'BuySoftener'

  # We're not doing it in real life, but we use it to showcase our first dependency!
  task DilluteDetergent => BuyDetergent

  # We're getting more complex here! This is the alternate way of defining
  # dependencies (which can be several, by the way!). Choose the style that fits
  # you best
  task TurnOnWashingMachine, depends_on: [BuyDetergent, 'BuySoftener']

  # Specify how many times a task is allowed to fail. If max_failures is reached
  # the task is given up
  task SelectProgram => TurnOnWashingMachine, max_failures: 2
end

# Every task must be a subclass of Pallets::Task
class BuyDetergent < Pallets::Task
  # Tasks must implement this method; here you can define whatever rocket science
  # your task needs to perform!
  def run
    # ...do whatever...
  end
end

# We're omitting the other task definitions for now; you shouldn't!