/
scheduler.rb
445 lines (371 loc) · 13.6 KB
/
scheduler.rb
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require 'rufus/scheduler'
require 'thwait'
require 'sidekiq/util'
require 'sidekiq-scheduler/manager'
require 'sidekiq-scheduler/rufus_utils'
require 'json'
module Sidekiq
class Scheduler
extend Sidekiq::Util
REGISTERED_JOBS_THRESHOLD_IN_SECONDS = 24 * 60 * 60
RUFUS_METADATA_KEYS = %w(description at cron every in interval enabled)
# We expect rufus jobs to have #params
Rufus::Scheduler::Job.module_eval do
alias_method :params, :opts
end
class << self
# Set to enable or disable the scheduler.
attr_accessor :enabled
# Set to update the schedule in runtime in a given time period.
attr_accessor :dynamic
# Set to schedule jobs only when will be pushed to queues listened by sidekiq
attr_accessor :listened_queues_only
# the Rufus::Scheduler jobs that are scheduled
def scheduled_jobs
@@scheduled_jobs
end
def print_schedule
if rufus_scheduler
logger.info "Scheduling Info\tLast Run"
scheduler_jobs = rufus_scheduler.all_jobs
scheduler_jobs.each do |_, v|
logger.info "#{v.t}\t#{v.last}\t"
end
end
end
# Pulls the schedule from Sidekiq.schedule and loads it into the
# rufus scheduler instance
def load_schedule!
if enabled
logger.info 'Loading Schedule'
# Load schedule from redis for the first time if dynamic
if dynamic
Sidekiq.reload_schedule!
@current_changed_score = Time.now.to_f
rufus_scheduler.every('5s') do
update_schedule
end
end
logger.info 'Schedule empty! Set Sidekiq.schedule' if Sidekiq.schedule.empty?
@@scheduled_jobs = {}
queues = sidekiq_queues
Sidekiq.schedule.each do |name, config|
if !listened_queues_only || enabled_queue?(config['queue'].to_s, queues)
load_schedule_job(name, config)
else
logger.info { "Ignoring #{name}, job's queue is not enabled." }
end
end
logger.info 'Schedules Loaded'
else
logger.info 'SidekiqScheduler is disabled'
end
end
# Loads a job schedule into the Rufus::Scheduler and stores it in @@scheduled_jobs
def load_schedule_job(name, config)
# If rails_env is set in the config, enforce ENV['RAILS_ENV'] as
# required for the jobs to be scheduled. If rails_env is missing, the
# job should be scheduled regardless of what ENV['RAILS_ENV'] is set
# to.
if config['rails_env'].nil? || rails_env_matches?(config)
logger.info "Scheduling #{name} #{config}"
interval_defined = false
interval_types = %w{cron every at in interval}
interval_types.each do |interval_type|
config_interval_type = config[interval_type]
if !config_interval_type.nil? && config_interval_type.length > 0
schedule, options = SidekiqScheduler::RufusUtils.normalize_schedule_options(config_interval_type)
rufus_job = new_job(name, interval_type, config, schedule, options)
@@scheduled_jobs[name] = rufus_job
update_job_next_time(name, rufus_job.next_time)
interval_defined = true
break
end
end
unless interval_defined
logger.info "no #{interval_types.join(' / ')} found for #{config['class']} (#{name}) - skipping"
end
end
end
# Pushes the job into Sidekiq if not already pushed for the given time
#
# @param [String] job_name The job's name
# @param [Time] time The time when the job got cleared for triggering
# @param [Hash] config Job's config hash
def idempotent_job_enqueue(job_name, time, config)
registered = register_job_instance(job_name, time)
if registered
logger.info "queueing #{config['class']} (#{job_name})"
handle_errors { enqueue_job(config, time) }
remove_elder_job_instances(job_name)
else
logger.debug { "Ignoring #{job_name} job as it has been already enqueued" }
end
end
# Pushes job's next time execution
#
# @param [String] name The job's name
# @param [Time] next_time The job's next time execution
def update_job_next_time(name, next_time)
Sidekiq.redis do |r|
next_time ? r.hset(next_times_key, name, next_time) : r.hdel(next_times_key, name)
end
end
# Pushes job's last execution time
#
# @param [String] name The job's name
# @param [Time] last_time The job's last execution time
def update_job_last_time(name, last_time)
Sidekiq.redis { |r| r.hset(last_times_key, name, last_time) } if last_time
end
# Returns true if the given schedule config hash matches the current
# ENV['RAILS_ENV']
def rails_env_matches?(config)
config['rails_env'] && ENV['RAILS_ENV'] && config['rails_env'].gsub(/\s/, '').split(',').include?(ENV['RAILS_ENV'])
end
def handle_errors
begin
yield
rescue StandardError => e
logger.info "#{e.class.name}: #{e.message}"
end
end
# Enqueue a job based on a config hash
#
# @param job_config [Hash] the job configuration
# @param time [Time] time the job is enqueued
def enqueue_job(job_config, time=Time.now)
config = prepare_arguments(job_config.dup)
if config.delete('include_metadata')
config['args'] = arguments_with_metadata(config['args'], scheduled_at: time.to_f)
end
if active_job_enqueue?(config['class'])
enqueue_with_active_job(config)
else
enqueue_with_sidekiq(config)
end
end
def rufus_scheduler_options
@rufus_scheduler_options ||= {}
end
def rufus_scheduler_options=(options)
@rufus_scheduler_options = options
end
def rufus_scheduler
@rufus_scheduler ||= new_rufus_scheduler
end
# Stops old rufus scheduler and creates a new one. Returns the new
# rufus scheduler
def clear_schedule!
rufus_scheduler.stop
@rufus_scheduler = nil
@@scheduled_jobs = {}
rufus_scheduler
end
def reload_schedule!
if enabled
logger.info 'Reloading Schedule'
clear_schedule!
load_schedule!
else
logger.info 'SidekiqScheduler is disabled'
end
end
def update_schedule
last_changed_score, @current_changed_score = @current_changed_score, Time.now.to_f
schedule_changes = Sidekiq.redis do |r|
r.zrangebyscore :schedules_changed, last_changed_score, "(#{@current_changed_score}"
end
if schedule_changes.size > 0
logger.info 'Updating schedule'
Sidekiq.reload_schedule!
schedule_changes.each do |schedule_name|
if Sidekiq.schedule.keys.include?(schedule_name)
unschedule_job(schedule_name)
load_schedule_job(schedule_name, Sidekiq.schedule[schedule_name])
else
unschedule_job(schedule_name)
end
end
logger.info 'Schedule updated'
end
end
def unschedule_job(name)
if scheduled_jobs[name]
logger.debug "Removing schedule #{name}"
scheduled_jobs[name].unschedule
scheduled_jobs.delete(name)
end
end
def enqueue_with_active_job(config)
options = {
queue: config['queue']
}.keep_if { |_, v| !v.nil? }
initialize_active_job(config['class'], config['args']).enqueue(options)
end
def enqueue_with_sidekiq(config)
Sidekiq::Client.push(sanitize_job_config(config))
end
def initialize_active_job(klass, args)
if args.is_a?(Array)
klass.new(*args)
else
klass.new(args)
end
end
# Returns true if the enqueuing needs to be done for an ActiveJob
# class false otherwise.
#
# @param [Class] klass the class to check is decendant from ActiveJob
#
# @return [Boolean]
def active_job_enqueue?(klass)
klass.is_a?(Class) && defined?(ActiveJob::Enqueuing) &&
klass.included_modules.include?(ActiveJob::Enqueuing)
end
# Convert the given arguments in the format expected to be enqueued.
#
# @param [Hash] config the options to be converted
# @option config [String] class the job class
# @option config [Hash/Array] args the arguments to be passed to the job
# class
#
# @return [Hash]
def prepare_arguments(config)
config['class'] = try_to_constantize(config['class'])
if config['args'].is_a?(Hash)
config['args'].symbolize_keys! if config['args'].respond_to?(:symbolize_keys!)
else
config['args'] = Array(config['args'])
end
config
end
def try_to_constantize(klass)
klass.is_a?(String) ? klass.constantize : klass
rescue NameError
klass
end
# Returns true if a job's queue is included in the array of queues
#
# If queues are empty, returns true.
#
# @param [String] job_queue Job's queue name
# @param [Array<String>] queues
#
# @return [Boolean]
def enabled_queue?(job_queue, queues)
queues.empty? || queues.include?(job_queue)
end
# Registers a queued job instance
#
# @param [String] job_name The job's name
# @param [Time] time Time at which the job was cleared by the scheduler
#
# @return [Boolean] true if the job was registered, false when otherwise
def register_job_instance(job_name, time)
pushed_job_key = pushed_job_key(job_name)
registered, _ = Sidekiq.redis do |r|
r.pipelined do
r.zadd(pushed_job_key, time.to_i, time.to_i)
r.expire(pushed_job_key, REGISTERED_JOBS_THRESHOLD_IN_SECONDS)
end
end
registered
end
def remove_elder_job_instances(job_name)
Sidekiq.redis do |r|
r.zremrangebyscore(pushed_job_key(job_name), 0, Time.now.to_i - REGISTERED_JOBS_THRESHOLD_IN_SECONDS)
end
end
# Returns the key of the Redis sorted set used to store job enqueues
#
# @param [String] job_name The name of the job
#
# @return [String]
def pushed_job_key(job_name)
"sidekiq-scheduler:pushed:#{job_name}"
end
# Returns the key of the Redis hash for job's execution times hash
#
# @return [String] with the key
def next_times_key
'sidekiq-scheduler:next_times'
end
# Returns the key of the Redis hash for job's last execution times hash
#
# @return [String] with the key
def last_times_key
'sidekiq-scheduler:last_times'
end
# Returns the Redis's key for saving schedule states.
#
# @return [String] with the key
def schedules_state_key
'sidekiq-scheduler:states'
end
def job_enabled?(name)
job = Sidekiq.schedule[name]
schedule_state(name).fetch('enabled', job.fetch('enabled', true)) if job
end
def toggle_job_enabled(name)
state = schedule_state(name)
state['enabled'] = !job_enabled?(name)
set_schedule_state(name, state)
end
private
def new_rufus_scheduler
Rufus::Scheduler.new(rufus_scheduler_options).tap do |scheduler|
scheduler.define_singleton_method(:on_post_trigger) do |job, triggered_time|
Sidekiq::Scheduler.update_job_last_time(job.tags[0], triggered_time)
Sidekiq::Scheduler.update_job_next_time(job.tags[0], job.next_time)
end
end
end
def new_job(name, interval_type, config, schedule, options)
options = options.merge({ :job => true, :tags => [name] })
rufus_scheduler.send(interval_type, schedule, options) do |job, time|
idempotent_job_enqueue(name, time, sanitize_job_config(config)) if job_enabled?(name)
end
end
def sanitize_job_config(config)
config.reject { |k, _| RUFUS_METADATA_KEYS.include?(k) }
end
# Retrieves a schedule state
#
# @param name [String] with the schedule's name
# @return [Hash] with the schedule's state
def schedule_state(name)
state = Sidekiq.redis { |r| r.hget(schedules_state_key, name) }
state ? JSON.parse(state) : {}
end
# Saves a schedule state
#
# @param name [String] with the schedule's name
# @param name [Hash] with the schedule's state
def set_schedule_state(name, state)
Sidekiq.redis { |r| r.hset(schedules_state_key, name, JSON.generate(state)) }
end
# Adds a Hash with schedule metadata as the last argument to call the worker.
# It currently returns the schedule time as a Float number representing the milisencods
# since epoch.
#
# @example with hash argument
# arguments_with_metadata({value: 1}, scheduled_at: Time.now)
# #=> [{value: 1}, {scheduled_at: <miliseconds since epoch>}]
#
# @param args [Array|Hash]
# @param metadata [Hash]
# @return [Array] arguments with added metadata
def arguments_with_metadata(args, metadata)
if args.is_a? Array
[*args, metadata]
else
[args, metadata]
end
end
def sidekiq_queues
Sidekiq.options[:queues].map(&:to_s)
end
end
end
end