Class: LogStash::Outputs::Gcs::WorkerPool

Inherits:
Object
  • Object
show all
Defined in:
lib/logstash/outputs/gcs/worker_pool.rb

Overview

WorkerPool creates a pool of workers that can handle jobs.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(max_threads, synchronous = false) ⇒ WorkerPool

Returns a new instance of WorkerPool.



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# File 'lib/logstash/outputs/gcs/worker_pool.rb', line 12

def initialize(max_threads, synchronous=false)
  @synchronous = synchronous

  # set queue depth to the be the same as the number of threads so
  # there's at most one pending job each when the plugin quits
  @workers = Concurrent::ThreadPoolExecutor.new(
    min_threads: 1,
    max_threads: max_threads,
    max_queue: max_threads,
    fallback_policy: :caller_runs
  )
end

Instance Attribute Details

#workers ⇒ Object (readonly)

Returns the value of attribute workers.



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# File 'lib/logstash/outputs/gcs/worker_pool.rb', line 10

def workers
  @workers
end

Instance Method Details

#post(&block) ⇒ Object

Submits a job to the worker pool, raises an error if the pool has already been stopped.



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# File 'lib/logstash/outputs/gcs/worker_pool.rb', line 27

def post(&block)
  raise 'Pool already stopped' unless @workers.running?

  if @synchronous
    block.call
  else
    @workers.post do
      block.call
    end
  end
end

#stop! ⇒ Object

Stops the worker pool



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# File 'lib/logstash/outputs/gcs/worker_pool.rb', line 40

def stop!
  @workers.shutdown
  @workers.wait_for_termination
end