Class: Task

Inherits:
SiteRecord show all
Defined in:
lib/yodel/task_queue/task.rb

Constant Summary collapse

FAILED_TASK_DELAY =

2 minutes

2 * 60
MAX_TASK_ATTEMPTS = 
5

Constants inherited from AbstractRecord

AbstractRecord::CALLBACKS, AbstractRecord::FIELD_CALLBACKS, AbstractRecord::ORDERS

Instance Attribute Summary

Attributes inherited from SiteRecord

#site

Attributes inherited from AbstractRecord

#changed, #errors, #stash, #typecast, #values

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from SiteRecord

#default_values, #initialize, #inspect_hash, #perform_reload, #prepare_reload_params, #site_id

Methods included from SiteModel

#load, #scoped, #scoped_for

Methods included from MongoModel

#collection, #load, #scoped

Methods included from AbstractModel

#embed_many, #embed_one, #field, #fields, #many, #modify_field, #one, #remove_field

Methods inherited from MongoRecord

#collection, #default_values, #fields, #id, #increment!, #inspect_hash, #load_from_mongo, #load_mongo_document, #perform_destroy, #perform_reload, #perform_save, #set_id

Methods inherited from AbstractRecord

#changed!, #changed?, #clear_key, #default_values, #destroy, #destroyed?, #eql?, #errors?, #field, #field?, #field_was, #fields, #from_json, #get, #get_meta, #get_raw, #hash, #id, #increment!, inherited, #initialize, #inspect, #inspect_hash, #inspect_value, #method_missing, #new?, #prepare_reload_params, #present?, #reload, #save, #save_without_validation, #search_terms, #set, #set_meta, #set_raw, #to_json, #to_str, #trigger_field_callback, #update, #valid?

Constructor Details

This class inherits a constructor from SiteRecord

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class AbstractRecord

Class Method Details

.add_task(type, params, site, due = nil) ⇒ Object 



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# File 'lib/yodel/task_queue/task.rb', line 15

def self.add_task(type, params, site, due=nil)
  task = Task.new(site)
  task.type = type.to_s
  task.params = params
  task.due = due
  task.save
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/yodel/task_queue/task.rb', line 23

def execute
  # TODO: plugins need a way of inserting themselves in to this switch
  case self.type
  when 'deliver_email'
    email = site.emails.find(params['_id'])
    email.perform_delivery(params)
  when 'call_api'
    api_call = site.api_calls.find(params['_id'])
    api_call.perform_call(params)
  when 'perform_destroy_stale_carts'
    Cart.perform_destroy_stale_carts(site)
  end
  
  # if the task repeats, place it on the queue again by reseting the
  # due time and removing the locked time making it available again
  if repeat_in?
    self.due = Time.at(Time.now.utc.to_i + repeat_in)
    self.locked = nil
    self.save
  else
    self.destroy
  end
  
rescue
  # increase the attempt count after any exceptions. after N attempts
  # the task is halted and assumed to have failed. manual intervention
  # is required to start it again. delay its execution on the queue for
  # a certain amount of time to potentially allow resource issues to
  # "fix themselves" (such as loss of network).
  self.attempts += 1
  
  if self.attempts < MAX_TASK_ATTEMPTS
    self.due = Time.at(Time.now.utc.to_i + FAILED_TASK_DELAY)
    self.locked = nil
  end
  
  self.stack_trace = "Error: #{$!}\n#{$@.join("\n")}"
  self.save
end