Module: Resque
- Extended by:
- Resque
- Includes:
- Helpers
- Included in:
- Resque
- Defined in:
- lib/resque.rb,
lib/resque/job.rb,
lib/resque/stat.rb,
lib/resque/errors.rb,
lib/resque/plugin.rb,
lib/resque/server.rb,
lib/resque/worker.rb,
lib/resque/failure.rb,
lib/resque/helpers.rb,
lib/resque/logging.rb,
lib/resque/version.rb,
lib/resque/failure/base.rb,
lib/resque/failure/redis.rb,
lib/resque/failure/hoptoad.rb,
lib/resque/failure/airbrake.rb,
lib/resque/failure/multiple.rb,
lib/resque/failure/thoughtbot.rb,
lib/resque/server/test_helper.rb,
lib/resque/failure/redis_multi_queue.rb,
lib/resque/log_formatters/quiet_formatter.rb,
lib/resque/log_formatters/verbose_formatter.rb,
lib/resque/log_formatters/very_verbose_formatter.rb
Defined Under Namespace
Modules: Failure, Helpers, Logging, Plugin, Stat, TestHelper Classes: DirtyExit, Job, NoClassError, NoQueueError, QuietFormatter, Server, TermException, VerboseFormatter, VeryVerboseFormatter, Worker
Constant Summary collapse
- Version =
VERSION = '1.23.1'
Instance Attribute Summary collapse
-
#after_pause(&block) ⇒ Object
The ‘after_pause` hook will be run in the parent process after the worker has paused (via SIGCONT).
-
#before_pause(&block) ⇒ Object
The ‘before_pause` hook will be run in the parent process before the worker has paused processing (via #pause_processing or SIGUSR2).
-
#inline ⇒ Object
(also: #inline?)
Returns the value of attribute inline.
-
#logger ⇒ Object
Set or retrieve the current logger object.
Instance Method Summary collapse
-
#after_fork(&block) ⇒ Object
The ‘after_fork` hook will be run in the child process and is passed the current job.
-
#after_fork=(block) ⇒ Object
Register an after_fork proc.
-
#before_first_fork(&block) ⇒ Object
The ‘before_first_fork` hook will be run in the parent process only once, before forking to run the first job.
-
#before_first_fork=(block) ⇒ Object
Register a before_first_fork proc.
-
#before_fork(&block) ⇒ Object
The ‘before_fork` hook will be run in the parent process before every job, so be careful- any changes you make will be permanent for the lifespan of the worker.
-
#before_fork=(block) ⇒ Object
Register a before_fork proc.
-
#dequeue(klass, *args) ⇒ Object
This method can be used to conveniently remove a job from a queue.
-
#enqueue(klass, *args) ⇒ Object
This method can be used to conveniently add a job to a queue.
-
#enqueue_to(queue, klass, *args) ⇒ Object
Just like ‘enqueue` but allows you to specify the queue you want to use.
-
#info ⇒ Object
Returns a hash, similar to redis-rb’s #info, of interesting stats.
-
#keys ⇒ Object
Returns an array of all known Resque keys in Redis.
-
#list_range(key, start = 0, count = 1) ⇒ Object
Does the dirty work of fetching a range of items from a Redis list and converting them into Ruby objects.
-
#peek(queue, start = 0, count = 1) ⇒ Object
Returns an array of items currently queued.
-
#pop(queue) ⇒ Object
Pops a job off a queue.
-
#push(queue, item) ⇒ Object
Pushes a job onto a queue.
-
#queue_from_class(klass) ⇒ Object
Given a class, try to extrapolate an appropriate queue based on a class instance variable or ‘queue` method.
-
#queues ⇒ Object
Returns an array of all known Resque queues as strings.
-
#redis ⇒ Object
Returns the current Redis connection.
-
#redis=(server) ⇒ Object
Accepts: 1.
- #redis_id ⇒ Object
-
#remove_queue(queue) ⇒ Object
Given a queue name, completely deletes the queue.
-
#remove_worker(worker_id) ⇒ Object
A shortcut to unregister_worker useful for command line tool.
-
#reserve(queue) ⇒ Object
This method will return a ‘Resque::Job` object or a non-true value depending on whether a job can be obtained.
-
#size(queue) ⇒ Object
Returns an integer representing the size of a queue.
- #to_s ⇒ Object
-
#validate(klass, queue = nil) ⇒ Object
Validates if the given klass could be a valid Resque job.
-
#watch_queue(queue) ⇒ Object
Used internally to keep track of which queues we’ve created.
-
#workers ⇒ Object
A shortcut to Worker.all.
-
#working ⇒ Object
A shortcut to Worker.working.
Methods included from Helpers
#classify, #constantize, #decode, #encode
Instance Attribute Details
#after_pause(&block) ⇒ Object
The ‘after_pause` hook will be run in the parent process after the worker has paused (via SIGCONT).
134 135 136 |
# File 'lib/resque.rb', line 134 def after_pause(&block) block ? register_hook(:after_pause, block) : hooks(:after_pause) end |
#before_pause(&block) ⇒ Object
The ‘before_pause` hook will be run in the parent process before the worker has paused processing (via #pause_processing or SIGUSR2).
125 126 127 |
# File 'lib/resque.rb', line 125 def before_pause(&block) block ? register_hook(:before_pause, block) : hooks(:before_pause) end |
#inline ⇒ Object Also known as: inline?
Returns the value of attribute inline.
145 146 147 |
# File 'lib/resque.rb', line 145 def inline @inline end |
#logger ⇒ Object
Set or retrieve the current logger object
75 76 77 |
# File 'lib/resque.rb', line 75 def logger @logger end |
Instance Method Details
#after_fork(&block) ⇒ Object
The ‘after_fork` hook will be run in the child process and is passed the current job. Any changes you make, therefore, will only live as long as the job currently being processed.
Call with a block to register a hook. Call with no arguments to return all registered hooks.
114 115 116 |
# File 'lib/resque.rb', line 114 def after_fork(&block) block ? register_hook(:after_fork, block) : hooks(:after_fork) end |
#after_fork=(block) ⇒ Object
Register an after_fork proc.
119 120 121 |
# File 'lib/resque.rb', line 119 def after_fork=(block) register_hook(:after_fork, block) end |
#before_first_fork(&block) ⇒ Object
The ‘before_first_fork` hook will be run in the parent process only once, before forking to run the first job. Be careful- any changes you make will be permanent for the lifespan of the worker.
Call with a block to register a hook. Call with no arguments to return all registered hooks.
84 85 86 |
# File 'lib/resque.rb', line 84 def before_first_fork(&block) block ? register_hook(:before_first_fork, block) : hooks(:before_first_fork) end |
#before_first_fork=(block) ⇒ Object
Register a before_first_fork proc.
89 90 91 |
# File 'lib/resque.rb', line 89 def before_first_fork=(block) register_hook(:before_first_fork, block) end |
#before_fork(&block) ⇒ Object
The ‘before_fork` hook will be run in the parent process before every job, so be careful- any changes you make will be permanent for the lifespan of the worker.
Call with a block to register a hook. Call with no arguments to return all registered hooks.
99 100 101 |
# File 'lib/resque.rb', line 99 def before_fork(&block) block ? register_hook(:before_fork, block) : hooks(:before_fork) end |
#before_fork=(block) ⇒ Object
Register a before_fork proc.
104 105 106 |
# File 'lib/resque.rb', line 104 def before_fork=(block) register_hook(:before_fork, block) end |
#dequeue(klass, *args) ⇒ Object
This method can be used to conveniently remove a job from a queue. It assumes the class you’re passing it is a real Ruby class (not a string or reference) which either:
a) has a @queue ivar set
b) responds to `queue`
If either of those conditions are met, it will use the value obtained from performing one of the above operations to determine the queue.
If no queue can be inferred this method will raise a ‘Resque::NoQueueError`
If no args are given, this method will dequeue all jobs matching the provided class. See ‘Resque::Job.destroy` for more information.
Returns the number of jobs destroyed.
Example:
# Removes all jobs of class `UpdateNetworkGraph`
Resque.dequeue(GitHub::Jobs::UpdateNetworkGraph)
# Removes all jobs of class `UpdateNetworkGraph` with matching args.
Resque.dequeue(GitHub::Jobs::UpdateNetworkGraph, 'repo:135325')
This method is considered part of the ‘stable` API.
307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 |
# File 'lib/resque.rb', line 307 def dequeue(klass, *args) # Perform before_dequeue hooks. Don't perform dequeue if any hook returns false before_hooks = Plugin.before_dequeue_hooks(klass).collect do |hook| klass.send(hook, *args) end return if before_hooks.any? { |result| result == false } destroyed = Job.destroy(queue_from_class(klass), klass, *args) Plugin.after_dequeue_hooks(klass).each do |hook| klass.send(hook, *args) end destroyed end |
#enqueue(klass, *args) ⇒ Object
This method can be used to conveniently add a job to a queue. It assumes the class you’re passing it is a real Ruby class (not a string or reference) which either:
a) has a @queue ivar set
b) responds to `queue`
If either of those conditions are met, it will use the value obtained from performing one of the above operations to determine the queue.
If no queue can be inferred this method will raise a ‘Resque::NoQueueError`
Returns true if the job was queued, nil if the job was rejected by a before_enqueue hook.
This method is considered part of the ‘stable` API.
251 252 253 |
# File 'lib/resque.rb', line 251 def enqueue(klass, *args) enqueue_to(queue_from_class(klass), klass, *args) end |
#enqueue_to(queue, klass, *args) ⇒ Object
Just like ‘enqueue` but allows you to specify the queue you want to use. Runs hooks.
‘queue` should be the String name of the queue you’re targeting.
Returns true if the job was queued, nil if the job was rejected by a before_enqueue hook.
This method is considered part of the ‘stable` API.
264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 |
# File 'lib/resque.rb', line 264 def enqueue_to(queue, klass, *args) # Perform before_enqueue hooks. Don't perform enqueue if any hook returns false before_hooks = Plugin.before_enqueue_hooks(klass).collect do |hook| klass.send(hook, *args) end return nil if before_hooks.any? { |result| result == false } Job.create(queue, klass, *args) Plugin.after_enqueue_hooks(klass).each do |hook| klass.send(hook, *args) end return true end |
#info ⇒ Object
Returns a hash, similar to redis-rb’s #info, of interesting stats.
383 384 385 386 387 388 389 390 391 392 393 394 |
# File 'lib/resque.rb', line 383 def info return { :pending => queues.inject(0) { |m,k| m + size(k) }, :processed => Stat[:processed], :queues => queues.size, :workers => workers.size.to_i, :working => working.size, :failed => Stat[:failed], :servers => [redis_id], :environment => ENV['RAILS_ENV'] || ENV['RACK_ENV'] || 'development' } end |
#keys ⇒ Object
Returns an array of all known Resque keys in Redis. Redis’ KEYS operation is O(N) for the keyspace, so be careful - this can be slow for big databases.
398 399 400 401 402 |
# File 'lib/resque.rb', line 398 def keys redis.keys("*").map do |key| key.sub("#{redis.namespace}:", '') end end |
#list_range(key, start = 0, count = 1) ⇒ Object
Does the dirty work of fetching a range of items from a Redis list and converting them into Ruby objects.
203 204 205 206 207 208 209 210 211 |
# File 'lib/resque.rb', line 203 def list_range(key, start = 0, count = 1) if count == 1 decode redis.lindex(key, start) else Array(redis.lrange(key, start, start+count-1)).map do |item| decode item end end end |
#peek(queue, start = 0, count = 1) ⇒ Object
Returns an array of items currently queued. Queue name should be a string.
start and count should be integer and can be used for pagination. start is the item to begin, count is how many items to return.
To get the 3rd page of a 30 item, paginatied list one would use:
Resque.peek('my_list', 59, 30)
197 198 199 |
# File 'lib/resque.rb', line 197 def peek(queue, start = 0, count = 1) list_range("queue:#{queue}", start, count) end |
#pop(queue) ⇒ Object
Pops a job off a queue. Queue name should be a string.
Returns a Ruby object.
179 180 181 |
# File 'lib/resque.rb', line 179 def pop(queue) decode redis.lpop("queue:#{queue}") end |
#push(queue, item) ⇒ Object
Pushes a job onto a queue. Queue name should be a string and the item should be any JSON-able Ruby object.
Resque works generally expect the ‘item` to be a hash with the following keys:
class - The String name of the job to run.
args - An Array of arguments to pass the job. Usually passed
via `class.to_class.perform(*args)`.
Example
Resque.push('archive', :class => 'Archive', :args => [ 35, 'tar' ])
Returns nothing
171 172 173 174 |
# File 'lib/resque.rb', line 171 def push(queue, item) watch_queue(queue) redis.rpush "queue:#{queue}", encode(item) end |
#queue_from_class(klass) ⇒ Object
Given a class, try to extrapolate an appropriate queue based on a class instance variable or ‘queue` method.
325 326 327 328 |
# File 'lib/resque.rb', line 325 def queue_from_class(klass) klass.instance_variable_get(:@queue) || (klass.respond_to?(:queue) and klass.queue) end |
#queues ⇒ Object
Returns an array of all known Resque queues as strings.
214 215 216 |
# File 'lib/resque.rb', line 214 def queues Array(redis.smembers(:queues)) end |
#redis ⇒ Object
Returns the current Redis connection. If none has been created, will create a new one.
57 58 59 60 61 |
# File 'lib/resque.rb', line 57 def redis return @redis if @redis self.redis = Redis.respond_to?(:connect) ? Redis.connect : "localhost:6379" self.redis end |
#redis=(server) ⇒ Object
Accepts:
1. A 'hostname:port' String
2. A 'hostname:port:db' String (to select the Redis db)
3. A 'hostname:port/namespace' String (to set the Redis namespace)
4. A Redis URL String 'redis://host:port'
5. An instance of `Redis`, `Redis::Client`, `Redis::DistRedis`,
or `Redis::Namespace`.
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 |
# File 'lib/resque.rb', line 34 def redis=(server) case server when String if server =~ /redis\:\/\// redis = Redis.connect(:url => server, :thread_safe => true) else server, namespace = server.split('/', 2) host, port, db = server.split(':') redis = Redis.new(:host => host, :port => port, :thread_safe => true, :db => db) end namespace ||= :resque @redis = Redis::Namespace.new(namespace, :redis => redis) when Redis::Namespace @redis = server else @redis = Redis::Namespace.new(:resque, :redis => server) end end |
#redis_id ⇒ Object
63 64 65 66 67 68 69 70 71 72 |
# File 'lib/resque.rb', line 63 def redis_id # support 1.x versions of redis-rb if redis.respond_to?(:server) redis.server elsif redis.respond_to?(:nodes) # distributed redis.nodes.map { |n| n.id }.join(', ') else redis.client.id end end |
#remove_queue(queue) ⇒ Object
Given a queue name, completely deletes the queue.
219 220 221 222 |
# File 'lib/resque.rb', line 219 def remove_queue(queue) redis.srem(:queues, queue.to_s) redis.del("queue:#{queue}") end |
#remove_worker(worker_id) ⇒ Object
A shortcut to unregister_worker useful for command line tool
373 374 375 376 |
# File 'lib/resque.rb', line 373 def remove_worker(worker_id) worker = Resque::Worker.find(worker_id) worker.unregister_worker end |
#reserve(queue) ⇒ Object
This method will return a ‘Resque::Job` object or a non-true value depending on whether a job can be obtained. You should pass it the precise name of a queue: case matters.
This method is considered part of the ‘stable` API.
335 336 337 |
# File 'lib/resque.rb', line 335 def reserve(queue) Job.reserve(queue) end |
#size(queue) ⇒ Object
Returns an integer representing the size of a queue. Queue name should be a string.
185 186 187 |
# File 'lib/resque.rb', line 185 def size(queue) redis.llen("queue:#{queue}").to_i end |
#to_s ⇒ Object
141 142 143 |
# File 'lib/resque.rb', line 141 def to_s "Resque Client connected to #{redis_id}" end |
#validate(klass, queue = nil) ⇒ Object
Validates if the given klass could be a valid Resque job
If no queue can be inferred this method will raise a ‘Resque::NoQueueError`
If given klass is nil this method will raise a ‘Resque::NoClassError`
344 345 346 347 348 349 350 351 352 353 354 |
# File 'lib/resque.rb', line 344 def validate(klass, queue = nil) queue ||= queue_from_class(klass) if !queue raise NoQueueError.new("Jobs must be placed onto a queue.") end if klass.to_s.empty? raise NoClassError.new("Jobs must be given a class.") end end |
#watch_queue(queue) ⇒ Object
Used internally to keep track of which queues we’ve created. Don’t call this directly.
226 227 228 |
# File 'lib/resque.rb', line 226 def watch_queue(queue) redis.sadd(:queues, queue.to_s) end |