Class: Sidekiq::Capsule

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Component
Defined in:
lib/sidekiq/capsule.rb

Overview

A Sidekiq::Capsule is the set of resources necessary to process one or more queues with a given concurrency. One “default” Capsule is started but the user may declare additional Capsules in their initializer.

This capsule will pull jobs from the “single” queue and process the jobs with one thread, meaning the jobs will be processed serially.

Sidekiq.configure_server do |config|

config.capsule("single-threaded") do |cap|
  cap.concurrency = 1
  cap.queues = %w(single)
end

end

Instance Attribute Summary collapse

Attributes included from Component

#config

Instance Method Summary collapse

Methods included from Component

#fire_event, #handle_exception, #hostname, #identity, #inspect, #process_nonce, #safe_thread, #tid, #watchdog

Constructor Details

#initialize(name, config) ⇒ Capsule

Returns a new instance of Capsule.



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# File 'lib/sidekiq/capsule.rb', line 32

def initialize(name, config)
  @name = name
  @config = config
  @queues = ["default"]
  @weights = {"default" => 0}
  @concurrency = config[:concurrency]
  @mode = :strict
end

Instance Attribute Details

#concurrency ⇒ Object

Returns the value of attribute concurrency.



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# File 'lib/sidekiq/capsule.rb', line 26

def concurrency
  @concurrency
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/sidekiq/capsule.rb', line 27

def mode
  @mode
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/sidekiq/capsule.rb', line 24

def name
  @name
end

#queues ⇒ Object

Returns the value of attribute queues.



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# File 'lib/sidekiq/capsule.rb', line 25

def queues
  @queues
end

#weights ⇒ Object (readonly)

Returns the value of attribute weights.



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# File 'lib/sidekiq/capsule.rb', line 28

def weights
  @weights
end

Instance Method Details

#client_middleware {|@client_chain| ... } ⇒ Object

Allow the middleware to be different per-capsule. Avoid if possible and add middleware globally so all capsules share the same chains. Easier to debug that way.

Yields:

  • (@client_chain) 


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# File 'lib/sidekiq/capsule.rb', line 80

def client_middleware
  @client_chain ||= config.client_middleware.copy_for(self)
  yield @client_chain if block_given?
  @client_chain
end

#fetcher ⇒ Object 



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# File 'lib/sidekiq/capsule.rb', line 41

def fetcher
  @fetcher ||= begin
    instance = (config[:fetch_class] || Sidekiq::BasicFetch).new(self)
    instance.setup(config[:fetch_setup]) if instance.respond_to?(:setup)
    instance
  end
end

#local_redis_pool ⇒ Object 



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# File 'lib/sidekiq/capsule.rb', line 96

def local_redis_pool
  # connection pool is lazy, it will not create connections unless you actually need them
  # so don't be skimpy!
  @redis ||= config.new_redis_pool(@concurrency, name)
end

#logger ⇒ Object 



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# File 'lib/sidekiq/capsule.rb', line 128

def logger
  config.logger
end

#lookup(name) ⇒ Object 



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# File 'lib/sidekiq/capsule.rb', line 124

def lookup(name)
  config.lookup(name)
end

#redis ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/sidekiq/capsule.rb', line 102

def redis
  raise ArgumentError, "requires a block" unless block_given?
  redis_pool.with do |conn|
    retryable = true
    begin
      yield conn
    rescue RedisClientAdapter::BaseError => ex
      # 2550 Failover can cause the server to become a replica, need
      # to disconnect and reopen the socket to get back to the primary.
      # 4495 Use the same logic if we have a "Not enough replicas" error from the primary
      # 4985 Use the same logic when a blocking command is force-unblocked
      # The same retry logic is also used in client.rb
      if retryable && ex.message =~ /READONLY|NOREPLICAS|UNBLOCKED/
        conn.close
        retryable = false
        retry
      end
      raise
    end
  end
end

#redis_pool ⇒ Object 



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# File 'lib/sidekiq/capsule.rb', line 92

def redis_pool
  Thread.current[:sidekiq_redis_pool] || local_redis_pool
end

#server_middleware {|@server_chain| ... } ⇒ Object

Yields:

  • (@server_chain) 


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# File 'lib/sidekiq/capsule.rb', line 86

def server_middleware
  @server_chain ||= config.server_middleware.copy_for(self)
  yield @server_chain if block_given?
  @server_chain
end

#stop ⇒ Object 



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# File 'lib/sidekiq/capsule.rb', line 49

def stop
  fetcher&.bulk_requeue([])
end