Module: ResqueScheduler

Included in:
Resque
Defined in:
lib/resque_scheduler/server.rb,
lib/resque_scheduler.rb,
lib/resque_scheduler/version.rb

Overview

Extend Resque::Server to add tabs

Defined Under Namespace

Modules: Server

Constant Summary collapse

Version = 
'1.0.8'

Instance Method Summary collapse

Instance Method Details

#delayed_push(timestamp, item) ⇒ Object

Used internally to stuff the item into the schedule sorted list. timestamp can be either in seconds or a datetime object Insertion if O(log(n)). Returns true if it’s the first job to be scheduled at that time, else false



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# File 'lib/resque_scheduler.rb', line 54

def delayed_push(timestamp, item)
  # First add this item to the list for this timestamp
  redis.rpush("delayed:#{timestamp.to_i}", encode(item))

  # Now, add this timestamp to the zsets.  The score and the value are
  # the same since we'll be querying by timestamp, and we don't have
  # anything else to store.
  redis.zadd :delayed_queue_schedule, timestamp.to_i, timestamp.to_i
end

#delayed_queue_peek(start, count) ⇒ Object

Returns an array of timestamps based on start and count



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# File 'lib/resque_scheduler.rb', line 65

def delayed_queue_peek(start, count)
  redis.zrange(:delayed_queue_schedule, start, start+count).collect(&:to_i)
end

#delayed_queue_schedule_size ⇒ Object

Returns the size of the delayed queue schedule



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# File 'lib/resque_scheduler.rb', line 70

def delayed_queue_schedule_size
  redis.zcard :delayed_queue_schedule
end

#delayed_timestamp_peek(timestamp, start, count) ⇒ Object

Returns an array of delayed items for the given timestamp



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# File 'lib/resque_scheduler.rb', line 80

def delayed_timestamp_peek(timestamp, start, count)
  if 1 == count
    r = list_range "delayed:#{timestamp.to_i}", start, count
    r.nil? ? [] : [r]
  else
    list_range "delayed:#{timestamp.to_i}", start, count
  end
end

#delayed_timestamp_size(timestamp) ⇒ Object

Returns the number of jobs for a given timestamp in the delayed queue schedule



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# File 'lib/resque_scheduler.rb', line 75

def delayed_timestamp_size(timestamp)
  redis.llen("delayed:#{timestamp.to_i}").to_i
end

#enqueue_at(timestamp, klass, *args) ⇒ Object

This method is nearly identical to enqueue only it also takes a timestamp which will be used to schedule the job for queueing. Until timestamp is in the past, the job will sit in the schedule list.



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# File 'lib/resque_scheduler.rb', line 40

def enqueue_at(timestamp, klass, *args)
  delayed_push(timestamp, :class => klass.to_s, :args => args, :queue => queue_from_class(klass))
end

#enqueue_in(number_of_seconds_from_now, klass, *args) ⇒ Object

Identical to enqueue_at but takes number_of_seconds_from_now instead of a timestamp.



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# File 'lib/resque_scheduler.rb', line 46

def enqueue_in(number_of_seconds_from_now, klass, *args)
  enqueue_at(Time.now + number_of_seconds_from_now, klass, *args)
end

#next_delayed_timestamp ⇒ Object

Returns the next delayed queue timestamp (don’t call directly)



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# File 'lib/resque_scheduler.rb', line 91

def next_delayed_timestamp
  timestamp = redis.zrangebyscore(:delayed_queue_schedule, '-inf', Time.now.to_i, 'limit', 0, 1).first
  timestamp.to_i unless timestamp.nil?
end

#next_item_for_timestamp(timestamp) ⇒ Object

Returns the next item to be processed for a given timestamp, nil if done. (don’t call directly) timestamp can either be in seconds or a datetime



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# File 'lib/resque_scheduler.rb', line 99

def next_item_for_timestamp(timestamp)
  key = "delayed:#{timestamp.to_i}"

  item = decode redis.lpop(key)

  # If the list is empty, remove it.
  if 0 == redis.llen(key).to_i
    redis.del key
    redis.zrem :delayed_queue_schedule, timestamp.to_i
  end
  item
end

#schedule ⇒ Object

Returns the schedule hash



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# File 'lib/resque_scheduler.rb', line 32

def schedule
  YAML.load(redis[:resque_schedule_hash])
end

#schedule=(schedule_hash) ⇒ Object

Accepts a new schedule configuration of the form:

{some_name => {"cron" => "5/* * * *",
               "class" => DoSomeWork,
               "args" => "work on this string",
               "description" => "this thing works it"s butter off"},
 ...}

:name can be anything and is used only to describe the scheduled job :cron can be any cron scheduling string :job can be any resque job class :class must be a resque worker class :args can be any yaml which will be converted to a ruby literal and passed

in a params. (optional)

:description is just that, a description of the job (optional). If params is

an array, each element in the array is passed as a separate param,
otherwise params is passed in as the only parameter to perform.



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# File 'lib/resque_scheduler.rb', line 27

def schedule=(schedule_hash)
  redis[:resque_schedule_hash] = schedule_hash.to_yaml
end