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/version.rb,
lib/resque/failure/base.rb,
lib/resque/failure/redis.rb,
lib/resque/failure/hoptoad.rb,
lib/resque/failure/multiple.rb,
lib/resque/server/test_helper.rb
Defined Under Namespace
Modules: Failure, Helpers, Plugin, Stat, TestHelper Classes: DirtyExit, Job, NoClassError, NoQueueError, Server, Worker
Constant Summary collapse
- Version =
VERSION = '1.16.0'
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=(after_fork) ⇒ Object
Set the 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=(before_first_fork) ⇒ Object
Set a proc that will be called in the parent process before the worker forks for the first time.
-
#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=(before_fork) ⇒ Object
Set the 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.
-
#info ⇒ Object
Returns a hash, similar to redis-rb’s #info, of interesting stats.
- #inline=(inline) ⇒ Object
-
#inline? ⇒ Boolean
(also: #inline)
If ‘inline’ is true Resque will call #perform method inline without queuing it into Redis and without any Resque callbacks.
-
#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 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 set the hook. Call with no arguments to return the hook.
109 110 111 |
# File 'lib/resque.rb', line 109 def after_fork(&block) block ? (@after_fork = block) : @after_fork end |
#after_fork=(after_fork) ⇒ Object
Set the after_fork proc.
114 115 116 |
# File 'lib/resque.rb', line 114 def after_fork=(after_fork) @after_fork = after_fork 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 set the hook. Call with no arguments to return the hook.
78 79 80 |
# File 'lib/resque.rb', line 78 def before_first_fork(&block) block ? (@before_first_fork = block) : @before_first_fork end |
#before_first_fork=(before_first_fork) ⇒ Object
Set a proc that will be called in the parent process before the worker forks for the first time.
84 85 86 |
# File 'lib/resque.rb', line 84 def before_first_fork=(before_first_fork) @before_first_fork = before_first_fork 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 set the hook. Call with no arguments to return the hook.
94 95 96 |
# File 'lib/resque.rb', line 94 def before_fork(&block) block ? (@before_fork = block) : @before_fork end |
#before_fork=(before_fork) ⇒ Object
Set the before_fork proc.
99 100 101 |
# File 'lib/resque.rb', line 99 def before_fork=(before_fork) @before_fork = before_fork 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.
265 266 267 |
# File 'lib/resque.rb', line 265 def dequeue(klass, *args) Job.destroy(queue_from_class(klass), klass, *args) 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`
This method is considered part of the ‘stable` API.
230 231 232 233 234 235 236 |
# File 'lib/resque.rb', line 230 def enqueue(klass, *args) Job.create(queue_from_class(klass), klass, *args) Plugin.after_enqueue_hooks(klass).each do |hook| klass.send(hook, *args) end end |
#info ⇒ Object
Returns a hash, similar to redis-rb’s #info, of interesting stats.
329 330 331 332 333 334 335 336 337 338 339 340 |
# File 'lib/resque.rb', line 329 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 |
#inline=(inline) ⇒ Object
130 131 132 |
# File 'lib/resque.rb', line 130 def inline=(inline) @inline = inline end |
#inline? ⇒ Boolean Also known as: inline
If ‘inline’ is true Resque will call #perform method inline without queuing it into Redis and without any Resque callbacks. The ‘inline’ is false Resque jobs will be put in queue regularly.
125 126 127 |
# File 'lib/resque.rb', line 125 def inline? @inline 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.
344 345 346 347 348 |
# File 'lib/resque.rb', line 344 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.
185 186 187 188 189 190 191 192 193 |
# File 'lib/resque.rb', line 185 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)
179 180 181 |
# File 'lib/resque.rb', line 179 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.
161 162 163 |
# File 'lib/resque.rb', line 161 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
153 154 155 156 |
# File 'lib/resque.rb', line 153 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.
271 272 273 274 |
# File 'lib/resque.rb', line 271 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.
196 197 198 |
# File 'lib/resque.rb', line 196 def queues Array(redis.smembers(:queues)) end |
#redis ⇒ Object
Returns the current Redis connection. If none has been created, will create a new one.
56 57 58 59 60 |
# File 'lib/resque.rb', line 56 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`.
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 |
# File 'lib/resque.rb', line 33 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
62 63 64 65 66 67 68 69 |
# File 'lib/resque.rb', line 62 def redis_id # support 1.x versions of redis-rb if redis.respond_to?(:server) redis.server else redis.client.id end end |
#remove_queue(queue) ⇒ Object
Given a queue name, completely deletes the queue.
201 202 203 204 |
# File 'lib/resque.rb', line 201 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
319 320 321 322 |
# File 'lib/resque.rb', line 319 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.
281 282 283 |
# File 'lib/resque.rb', line 281 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.
167 168 169 |
# File 'lib/resque.rb', line 167 def size(queue) redis.llen("queue:#{queue}").to_i end |
#to_s ⇒ Object
118 119 120 |
# File 'lib/resque.rb', line 118 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`
290 291 292 293 294 295 296 297 298 299 300 |
# File 'lib/resque.rb', line 290 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.
208 209 210 |
# File 'lib/resque.rb', line 208 def watch_queue(queue) redis.sadd(:queues, queue.to_s) end |