/
dalliance.rb
338 lines (268 loc) · 9.27 KB
/
dalliance.rb
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require 'rails'
require 'state_machine'
require 'benchmark'
require 'dalliance/state_machine'
require 'dalliance/version'
require 'dalliance/workers'
require 'dalliance/progress_meter'
require 'dalliance/engine' if defined?(Rails)
module Dalliance
extend ActiveSupport::Concern
class << self
def options
@options ||= {
:background_processing => (defined?(Rails) ? (Rails.env.production? || Rails.env.staging?) : true),
:dalliance_progress_meter => true,
:dalliance_progress_meter_total_count_method => :dalliance_progress_meter_total_count,
:worker_class => detect_worker_class,
:queue => 'dalliance',
:logger => detect_logger,
:duration_column => 'dalliance_duration',
:error_notifier => ->(e){}
}
end
def background_processing=(value)
options[:background_processing] = value
end
def dalliance_progress_meter=(value)
options[:dalliance_progress_meter] = value
end
def dalliance_progress_meter_total_count_method=(value)
options[:dalliance_progress_meter_total_count_method] = value
end
def worker_class=(value)
options[:worker_class] = value
end
def queue=(value)
options[:queue] = value
end
def logger=(value)
options[:logger] = value
end
def duration_column=(value)
options[:duration_column] = value
end
def error_notifier=(value)
options[:error_notifier] = value
end
def configure
yield(self) if block_given?
end
def detect_worker_class
return Dalliance::Workers::DelayedJob if defined? ::Delayed::Job
return Dalliance::Workers::Resque if defined? ::Resque
end
def detect_logger
if defined?(ActiveRecord)
ActiveRecord::Base.logger
elsif defined?(Rails)
Rails.logger
else
::Logger.new(STDOUT)
end
end
end
included do
has_one :dalliance_progress_meter, :as => :dalliance_progress_model, :class_name => '::Dalliance::ProgressMeter', :dependent => :destroy
serialize :dalliance_error_hash, Hash
#BEGIN state_machine(s)
scope :pending, -> { where(:dalliance_status => 'pending') }
scope :processing, -> { where(:dalliance_status => 'processing') }
scope :validation_error, -> { where(:dalliance_status => 'validation_error') }
scope :processing_error, -> { where(:dalliance_status => 'processing_error') }
scope :completed, -> { where(:dalliance_status => 'completed') }
state_machine :dalliance_status, :initial => :pending do
state :pending
state :processing
state :validation_error
state :processing_error
state :completed
#event :queue_dalliance do
# transition :processing_error => :pending
#end
event :start_dalliance do
transition :pending => :processing
end
event :validation_error_dalliance do
transition :processing => :validation_error
end
event :error_dalliance do
transition all => :processing_error
end
event :finish_dalliance do
transition :processing => :completed
end
end
#END state_machine(s)
before_destroy :validate_dalliance_status
end
module ClassMethods
def dalliance_status_in_load_select_array
state_machine(:dalliance_status).states.sort_by(&:name).map {|state| [state.human_name, state.name.to_s] }
end
def dalliance_durations
self.pluck(self.dalliance_options[:duration_column].to_sym)
end
def average_duration
self.average(self.dalliance_options[:duration_column])
end
def min_duration
self.minimum(self.dalliance_options[:duration_column])
end
def max_duration
self.maximum(self.dalliance_options[:duration_column])
end
end
def dalliance_log(message)
if self.class.dalliance_options[:logger]
self.class.dalliance_options[:logger].info(message)
end
end
def store_dalliance_validation_error!
self.dalliance_error_hash = {}
self.errors.each do |attribute, error|
self.dalliance_error_hash[attribute] ||= []
self.dalliance_error_hash[attribute] << error
end
begin
validation_error_dalliance!
rescue
begin
self.dalliance_status = 'validation_error'
dalliance_log("[dalliance] #{self.class.name}(#{id}) - #{dalliance_status} #{self.dalliance_error_hash}")
self.dalliance_error_hash = { error: 'Persistance Failure: See Logs' }
if defined?(Rails) && ::Rails::VERSION::MAJOR > 3
self.class.where(id: self.id).update_all(dalliance_status: dalliance_status, dalliance_error_hash: dalliance_error_hash )
else
self.class.where(id: self.id).update_all(dalliance_status: dalliance_status, dalliance_error_hash: dalliance_error_hash.to_yaml )
end
rescue
end
end
end
def error_notifier
self.dalliance_options[:error_notifier]
end
def error_or_completed?
validation_error? || processing_error? || completed?
end
def validate_dalliance_status
unless error_or_completed?
errors.add(:dalliance_status, :invalid)
return false
end
true
end
def pending_or_processing?
pending? || processing?
end
def processing_queue
if self.class.dalliance_options[:queue].respond_to?(:call)
self.class.instance_exec self, &dalliance_options[:queue]
else
self.class.dalliance_options[:queue]
end
end
#Force backgound_processing w/ true
def dalliance_background_process(backgound_processing = nil)
if backgound_processing || (backgound_processing.nil? && self.class.dalliance_options[:background_processing])
self.class.dalliance_options[:worker_class].enqueue(self, processing_queue)
else
dalliance_process(false)
end
end
#backgound_processing == false will re-raise any exceptions
def dalliance_process(backgound_processing = false)
start_time = Time.now
begin
start_dalliance!
if self.class.dalliance_options[:dalliance_progress_meter]
build_dalliance_progress_meter(:total_count => calculate_dalliance_progress_meter_total_count).save!
end
self.send(self.class.dalliance_options[:dalliance_method])
finish_dalliance! unless validation_error?
rescue StandardError => e
#Save the error for future analysis...
self.dalliance_error_hash = {:error => e.class.name, :message => e.message, :backtrace => e.backtrace}
begin
error_dalliance!
rescue
begin
self.dalliance_status = 'processing_error'
dalliance_log("[dalliance] #{self.class.name}(#{id}) - #{dalliance_status} #{dalliance_error_hash}")
self.dalliance_error_hash = { error: 'Persistance Failure: See Logs' }
if defined?(Rails) && ::Rails::VERSION::MAJOR > 3
self.class.where(id: self.id).update_all(dalliance_status: dalliance_status, dalliance_error_hash: dalliance_error_hash )
else
self.class.where(id: self.id).update_all(dalliance_status: dalliance_status, dalliance_error_hash: dalliance_error_hash.to_yaml )
end
rescue
end
end
error_notifier.call(e)
#Don't raise the error if we're backgound_processing...
raise e unless backgound_processing && self.class.dalliance_options[:worker_class].rescue_error?
ensure
if self.class.dalliance_options[:dalliance_progress_meter] && dalliance_progress_meter
#Works with optimistic locking...
Dalliance::ProgressMeter.delete(dalliance_progress_meter.id)
self.dalliance_progress_meter = nil
end
duration = Time.now - start_time
dalliance_log("[dalliance] #{self.class.name}(#{id}) - #{dalliance_status} #{duration.to_i}")
if self.class.dalliance_options[:duration_column]
self.class.where(id: self.id).update_all(self.class.dalliance_options[:duration_column] => duration.to_i)
end
end
end
def dalliance_progress
if completed?
100
else
if self.class.dalliance_options[:dalliance_progress_meter] && dalliance_progress_meter
dalliance_progress_meter.progress
else
0
end
end
end
#If the progress_meter_total_count_method is not implemented or raises and error just use 1...
def calculate_dalliance_progress_meter_total_count
begin
if respond_to?(self.class.dalliance_options[:dalliance_progress_meter_total_count_method])
self.send(self.class.dalliance_options[:dalliance_progress_meter_total_count_method])
else
1
end
rescue
1
end
end
module Glue
extend ActiveSupport::Concern
included do
class_attribute :dalliance_options
end
module ClassMethods
def dalliance(*args)
options = args.last.is_a?(Hash) ? Dalliance.options.merge(args.pop) : Dalliance.options
case args.length
when 1
options[:dalliance_method] = args[0]
else
raise ArgumentError, "Incorrect number of Arguements provided"
end
if dalliance_options.nil?
self.dalliance_options = {}
else
self.dalliance_options = self.dalliance_options.dup
end
self.dalliance_options.merge!(options)
include Dalliance
end
def dalliance_options
self.dalliance_options
end
end
end
end