Module: Resque
- Extended by:
- Forwardable, Resque
- 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/airbrake.rb,
lib/resque/failure/multiple.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 = '1.25.1'
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.
Class Method Summary collapse
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.
-
#decode(object) ⇒ Object
Given a string, returns a Ruby object.
-
#dequeue(klass, *args) ⇒ Object
This method can be used to conveniently remove a job from a queue.
-
#encode(object) ⇒ Object
Given a Ruby object, returns a string suitable for storage in 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.
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).
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# File 'lib/resque.rb', line 173 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).
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# File 'lib/resque.rb', line 164 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.
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# File 'lib/resque.rb', line 184 def inline @inline end |
#logger ⇒ Object
Set or retrieve the current logger object
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# File 'lib/resque.rb', line 114 def logger @logger end |
Class Method Details
.config ⇒ Object
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# File 'lib/resque.rb', line 58 def self.config @config ||= Config.new end |
.config=(options = {}) ⇒ Object
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# File 'lib/resque.rb', line 54 def self.config=( = {}) @config = Config.new() end |
.configure {|config| ... } ⇒ Object
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# File 'lib/resque.rb', line 62 def self.configure yield config 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.
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# File 'lib/resque.rb', line 153 def after_fork(&block) block ? register_hook(:after_fork, block) : hooks(:after_fork) end |
#after_fork=(block) ⇒ Object
Register an after_fork proc.
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# File 'lib/resque.rb', line 158 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.
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# File 'lib/resque.rb', line 123 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.
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# File 'lib/resque.rb', line 128 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.
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# File 'lib/resque.rb', line 138 def before_fork(&block) block ? register_hook(:before_fork, block) : hooks(:before_fork) end |
#before_fork=(block) ⇒ Object
Register a before_fork proc.
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# File 'lib/resque.rb', line 143 def before_fork=(block) register_hook(:before_fork, block) end |
#decode(object) ⇒ Object
Given a string, returns a Ruby object.
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# File 'lib/resque.rb', line 38 def decode(object) return unless object begin if MultiJson.respond_to?(:dump) && MultiJson.respond_to?(:load) MultiJson.load object else MultiJson.decode object end rescue ::MultiJson::DecodeError => e raise Helpers::DecodeException, e., e.backtrace end 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.
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# File 'lib/resque.rb', line 350 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 |
#encode(object) ⇒ Object
Given a Ruby object, returns a string suitable for storage in a queue.
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# File 'lib/resque.rb', line 29 def encode(object) if MultiJson.respond_to?(:dump) && MultiJson.respond_to?(:load) MultiJson.dump object else MultiJson.encode object end 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.
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# File 'lib/resque.rb', line 294 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.
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# File 'lib/resque.rb', line 307 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.
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# File 'lib/resque.rb', line 426 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 => Resque.redis.llen(:failed).to_i, :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.
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# File 'lib/resque.rb', line 441 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.
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# File 'lib/resque.rb', line 244 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)
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# File 'lib/resque.rb', line 238 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.
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# File 'lib/resque.rb', line 220 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
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# File 'lib/resque.rb', line 210 def push(queue, item) redis.pipelined do watch_queue(queue) redis.rpush "queue:#{queue}", encode(item) end end |
#queue_from_class(klass) ⇒ Object
Given a class, try to extrapolate an appropriate queue based on a class instance variable or ‘queue` method.
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# File 'lib/resque.rb', line 368 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.
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# File 'lib/resque.rb', line 255 def queues Array(redis.smembers(:queues)) end |
#redis ⇒ Object
Returns the current Redis connection. If none has been created, will create a new one.
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# File 'lib/resque.rb', line 96 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`.
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# File 'lib/resque.rb', line 73 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
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# File 'lib/resque.rb', line 102 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.
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# File 'lib/resque.rb', line 260 def remove_queue(queue) redis.pipelined do redis.srem(:queues, queue.to_s) redis.del("queue:#{queue}") end end |
#remove_worker(worker_id) ⇒ Object
A shortcut to unregister_worker useful for command line tool
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# File 'lib/resque.rb', line 416 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.
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# File 'lib/resque.rb', line 378 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.
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# File 'lib/resque.rb', line 226 def size(queue) redis.llen("queue:#{queue}").to_i end |
#to_s ⇒ Object
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# File 'lib/resque.rb', line 180 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`
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# File 'lib/resque.rb', line 387 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.
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# File 'lib/resque.rb', line 269 def watch_queue(queue) redis.sadd(:queues, queue.to_s) end |