Class: Delayed::Worker::HealthCheck

Inherits:
Object
  • Object
show all
Defined in:
lib/delayed/worker/health_check.rb

Direct Known Subclasses

ConsulHealthCheck, NullHealthCheck

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(worker_name:, config: {}) ⇒ HealthCheck

Returns a new instance of HealthCheck.



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# File 'lib/delayed/worker/health_check.rb', line 52

def initialize(worker_name:, config: {})
  @config = config.with_indifferent_access
  @worker_name = worker_name
end

Class Attribute Details

.subclasses ⇒ Object (readonly)

Returns the value of attribute subclasses.



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# File 'lib/delayed/worker/health_check.rb', line 8

def subclasses
  @subclasses
end

.type_name ⇒ Object

Returns the value of attribute type_name.



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# File 'lib/delayed/worker/health_check.rb', line 7

def type_name
  @type_name
end

Instance Attribute Details

#config ⇒ Object

Returns the value of attribute config.



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# File 'lib/delayed/worker/health_check.rb', line 50

def config
  @config
end

#worker_name ⇒ Object

Returns the value of attribute worker_name.



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# File 'lib/delayed/worker/health_check.rb', line 50

def worker_name
  @worker_name
end

Class Method Details

.build(type:, worker_name:, config: {}) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/delayed/worker/health_check.rb', line 14

def build(type:, worker_name:, config: {})
  type = type.to_sym
  klass = @subclasses.find { |sc| sc.type_name == type }
  raise ArgumentError, "Unable to build a HealthCheck for type #{type}" unless klass
  klass.new(worker_name: worker_name, config: config)
end

.inherited(subclass) ⇒ Object 



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# File 'lib/delayed/worker/health_check.rb', line 10

def inherited(subclass)
  @subclasses << subclass
end

.reschedule_abandoned_jobs ⇒ Object 



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# File 'lib/delayed/worker/health_check.rb', line 21

def reschedule_abandoned_jobs
  return if Settings.worker_health_check_type == :none

  checker = Worker::HealthCheck.build(
    type: Settings.worker_health_check_type,
    config: Settings.worker_health_check_config,
    worker_name: 'cleanup-crew'
  )
  live_workers = checker.live_workers

  Delayed::Job.running_jobs.each do |job|
    # prefetched jobs have their own way of automatically unlocking themselves
    next if job.locked_by.start_with?("prefetch:")
    unless live_workers.include?(job.locked_by)
      begin
        Delayed::Job.transaction do
          # double check that the job is still there. locked_by will immediately be reset
          # to nil in this transaction by Job#reschedule
          next unless Delayed::Job.where(id: job, locked_by: job.locked_by).update_all(locked_by: "abandoned job cleanup") == 1
          job.reschedule
        end
      rescue
        ::Rails.logger.error "Failure rescheduling abandoned job #{job.id} #{$!.inspect}"
      end
    end
  end
end

Instance Method Details

#live_workers ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/delayed/worker/health_check.rb', line 65

def live_workers
  raise NotImplementedError
end

#start ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/delayed/worker/health_check.rb', line 57

def start
  raise NotImplementedError
end

#stop ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/delayed/worker/health_check.rb', line 61

def stop
  raise NotImplementedError
end