Module: Resque::Scheduler::DelayingExtensions

Included in:
Extension
Defined in:
lib/resque/scheduler/delaying_extensions.rb

Instance Method Summary collapse

Instance Method Details

#count_all_scheduled_jobs ⇒ Object 



225
226
227
228
229
230
231
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 225

def count_all_scheduled_jobs
  total_jobs = 0
  Array(redis.zrange(:delayed_queue_schedule, 0, -1)).each do |ts|
    total_jobs += redis.llen("delayed:#{ts}").to_i
  end
  total_jobs
end

#delayed?(klass, *args) ⇒ Boolean

Discover if a job has been delayed. Examples

Resque.delayed?(MyJob)
Resque.delayed?(MyJob, id: 1)

Returns true if the job has been delayed

Returns:

  • (Boolean) 


238
239
240
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 238

def delayed?(klass, *args)
  !scheduled_at(klass, *args).empty?
end

#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



64
65
66
67
68
69
70
71
72
73
74
75
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 64

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

  # Store the timestamps at with this item occurs
  redis.sadd("timestamps:#{encode(item)}", "delayed:#{timestamp.to_i}")

  # 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



78
79
80
81
82
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 78

def delayed_queue_peek(start, count)
  result = redis.zrange(:delayed_queue_schedule, start,
                        start + count - 1)
  Array(result).map(&:to_i)
end

#delayed_queue_schedule_size ⇒ Object

Returns the size of the delayed queue schedule



85
86
87
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 85

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



96
97
98
99
100
101
102
103
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 96

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



91
92
93
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 91

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.



13
14
15
16
17
18
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 13

def enqueue_at(timestamp, klass, *args)
  validate(klass)
  enqueue_at_with_queue(
    queue_from_class(klass), timestamp, klass, *args
  )
end

#enqueue_at_with_queue(queue, timestamp, klass, *args) ⇒ Object

Identical to enqueue_at, except you can also specify a queue in which the job will be placed after the timestamp has passed. It respects Resque.inline option, by creating the job right away instead of adding to the queue.



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 24

def enqueue_at_with_queue(queue, timestamp, klass, *args)
  return false unless plugin.run_before_schedule_hooks(klass, *args)

  if Resque.inline? || timestamp.to_i < Time.now.to_i
    # Just create the job and let resque perform it right away with
    # inline.  If the class is a custom job class, call self#scheduled
    # on it. This allows you to do things like
    # Resque.enqueue_at(timestamp, CustomJobClass, :opt1 => val1).
    # Otherwise, pass off to Resque.
    if klass.respond_to?(:scheduled)
      klass.scheduled(queue, klass.to_s, *args)
    else
      Resque::Job.create(queue, klass, *args)
    end
  else
    delayed_push(timestamp, job_to_hash_with_queue(queue, klass, args))
  end

  plugin.run_after_schedule_hooks(klass, *args)
end

#enqueue_delayed(klass, *args) ⇒ Object

Given an encoded item, enqueue it now



147
148
149
150
151
152
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 147

def enqueue_delayed(klass, *args)
  hash = job_to_hash(klass, args)
  remove_delayed(klass, *args).times do
    Resque::Scheduler.enqueue_from_config(hash)
  end
end

#enqueue_delayed_selection(klass = nil) ⇒ Object

Given a block, enqueue jobs now that return true from a block

This allows for enqueuing of delayed jobs that have arguments matching certain criteria



171
172
173
174
175
176
177
178
179
180
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 171

def enqueue_delayed_selection(klass = nil)
  fail ArgumentError, 'Please supply a block' unless block_given?

  found_jobs = find_delayed_selection(klass) { |args| yield(args) }
  found_jobs.reduce(0) do |sum, encoded_job|
    decoded_job = decode(encoded_job)
    klass = Util.constantize(decoded_job['class'])
    sum + enqueue_delayed(klass, *decoded_job['args'])
  end
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.



47
48
49
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 47

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

#enqueue_in_with_queue(queue, number_of_seconds_from_now, klass, *args) ⇒ Object

Identical to enqueue_in, except you can also specify a queue in which the job will be placed after the number of seconds has passed.



54
55
56
57
58
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 54

def enqueue_in_with_queue(queue, number_of_seconds_from_now,
                          klass, *args)
  enqueue_at_with_queue(queue, Time.now + number_of_seconds_from_now,
                        klass, *args)
end

#find_delayed_selection(klass = nil, &block) ⇒ Object

Given a block, find jobs that return true from a block

This allows for finding of delayed jobs that have arguments matching certain criteria



186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 186

def find_delayed_selection(klass = nil, &block)
  fail ArgumentError, 'Please supply a block' unless block_given?

  found_jobs = []
  start = nil
  while start = search_first_delayed_timestamp_in_range(start, nil)
    job = "delayed:#{start}"
    start += 1
    index = Resque.redis.llen(job) - 1
    while index >= 0
      payload = Resque.redis.lindex(job, index)
      decoded_payload = decode(payload)
      if payload_matches_selection?(decoded_payload, klass, &block)
        found_jobs.push(payload)
      end
      index -= 1
    end
  end
  found_jobs
end

#get_last_enqueued_at(job_name) ⇒ Object 



254
255
256
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 254

def get_last_enqueued_at(job_name)
  redis.hget('delayed:last_enqueued_at', job_name)
end

#last_enqueued_at(job_name, date) ⇒ Object 



250
251
252
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 250

def last_enqueued_at(job_name, date)
  redis.hset('delayed:last_enqueued_at', job_name, date)
end

#next_delayed_timestamp(at_time = nil) ⇒ Object

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



107
108
109
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 107

def next_delayed_timestamp(at_time = nil)
  search_first_delayed_timestamp_in_range(nil, at_time || Time.now)
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



114
115
116
117
118
119
120
121
122
123
124
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 114

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

  encoded_item = redis.lpop(key)
  redis.srem("timestamps:#{encoded_item}", key)
  item = decode(encoded_item)

  # If the list is empty, remove it.
  clean_up_timestamp(key, timestamp)
  item
end

#remove_delayed(klass, *args) ⇒ Object

Given an encoded item, remove it from the delayed_queue



141
142
143
144
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 141

def remove_delayed(klass, *args)
  search = encode(job_to_hash(klass, args))
  remove_delayed_job(search)
end

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

Given a timestamp and job (klass + args) it removes all instances and returns the count of jobs removed.

O(N) where N is the number of jobs scheduled to fire at the given timestamp



212
213
214
215
216
217
218
219
220
221
222
223
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 212

def remove_delayed_job_from_timestamp(timestamp, klass, *args)
  return 0 if Resque.inline?

  key = "delayed:#{timestamp.to_i}"
  encoded_job = encode(job_to_hash(klass, args))

  redis.srem("timestamps:#{encoded_job}", key)
  count = redis.lrem(key, 0, encoded_job)
  clean_up_timestamp(key, timestamp)

  count
end

#remove_delayed_selection(klass = nil) ⇒ Object

Given a block, remove jobs that return true from a block

This allows for removal of delayed jobs that have arguments matching certain criteria



158
159
160
161
162
163
164
165
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 158

def remove_delayed_selection(klass = nil)
  fail ArgumentError, 'Please supply a block' unless block_given?

  found_jobs = find_delayed_selection(klass) { |args| yield(args) }
  found_jobs.reduce(0) do |sum, encoded_job|
    sum + remove_delayed_job(encoded_job)
  end
end

#reset_delayed_queue ⇒ Object

Clears all jobs created with enqueue_at or enqueue_in



127
128
129
130
131
132
133
134
135
136
137
138
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 127

def reset_delayed_queue
  Array(redis.zrange(:delayed_queue_schedule, 0, -1)).each do |item|
    key = "delayed:#{item}"
    items = redis.lrange(key, 0, -1)
    redis.pipelined do
      items.each { |ts_item| redis.del("timestamps:#{ts_item}") }
    end
    redis.del key
  end

  redis.del :delayed_queue_schedule
end

#scheduled_at(klass, *args) ⇒ Object

Returns delayed jobs schedule timestamp for klass, args.



243
244
245
246
247
248
 
# File 'lib/resque/scheduler/delaying_extensions.rb', line 243

def scheduled_at(klass, *args)
  search = encode(job_to_hash(klass, args))
  redis.smembers("timestamps:#{search}").map do |key|
    key.tr('delayed:', '').to_i
  end
end