Class: RSpecBackgroundProcess::ProcessPool

Inherits:
Object
  • Object
show all
Defined in:
lib/rspec-background-process/server.rb,
lib/rspec-background-process/process_pool.rb,
lib/rspec-background-process/refresh_actions.rb,
lib/rspec-background-process/readiness_checks.rb

Defined Under Namespace

Classes: LRUPool, ProcessDefinition

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ ProcessPool

Returns a new instance of ProcessPool.



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# File 'lib/rspec-background-process/process_pool.rb', line 243

def initialize(options)
  @stats = {}

  @max_running = options.delete(:max_running) || 4

  @pool = LRUPool.new(@max_running) do |key, instance|
    #puts "too many instances running, stopping: #{instance.name}[#{key}]; #{@pool}"
    stats(instance.name)[:lru_stopped] += 1
    instance.stop
  end

  # keep track of running instances
  @pool.after_store do |key, instance|
    instance.after_state_change do |new_state|
      # we mark running before it is actually started to have a chance to stop over-limit instance first
      if new_state == :starting
        #puts "new instance running: #{instance.name}[#{key}]"
        @pool.running(key)
        stats(instance.name)[:started] += 1
      end
      @pool.not_running(key) if [:not_running, :dead, :jammed].include? new_state
    end

    # mark running if added while already running
    @pool.running(key) if instance.running?

    # init stats
    stats(instance.name)[:started] ||= 0
    stats(instance.name)[:lru_stopped] ||= 0
  end

  # for storing shared data
  @global_context = {}

  # for filling template strings with actual instance data
  @template_renderer = ->(variables, string) {
    out = string.dup
    variables.merge(
      /project directory/ => -> { Dir.pwd.to_s }
    ).each do |regexp, source|
      out.gsub!(/<#{regexp}>/) do
        source.call(*$~.captures)
      end
    end
    out
  }

  # this are passed down to instance
  @options = options.merge(
    global_context:  @global_context,
    template_renderer: @template_renderer
  )
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/rspec-background-process/process_pool.rb', line 298

def options
  @options
end

#pool ⇒ Object (readonly)

Returns the value of attribute pool.



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# File 'lib/rspec-background-process/process_pool.rb', line 297

def pool
  @pool
end

Instance Method Details

#cleanup ⇒ Object 



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# File 'lib/rspec-background-process/process_pool.rb', line 304

def cleanup
  @pool.reset_active
end

#failed_instance ⇒ Object 



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# File 'lib/rspec-background-process/process_pool.rb', line 324

def failed_instance
  @pool.instances.select do |instance|
    instance.dead? or
    instance.failed? or
    instance.jammed?
  end.sort_by do |instance|
    instance.state_change_time
  end.last
end

#logging_enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rspec-background-process/process_pool.rb', line 300

def logging_enabled?
  @options[:logging]
end

#report_failed_instance ⇒ Object 



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# File 'lib/rspec-background-process/process_pool.rb', line 334

def report_failed_instance
  if failed_instance
    puts "Last failed process instance state log: "
    failed_instance.state_log.each do |log_line|
      puts "\t#{log_line}"
    end
    puts "Working directory: #{failed_instance.working_directory}"
    puts "Log file: #{failed_instance.log_file}"
    puts "State: #{failed_instance.state}"
    puts "Exit code: #{failed_instance.exit_code}"
  else
    puts "No process instance in failed state"
  end
end

#report_logs ⇒ Object 



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# File 'lib/rspec-background-process/process_pool.rb', line 349

def report_logs
  puts "Process instance logs:"
  @pool.instances.each do |instance|
    puts "#{instance.name}: #{instance.log_file}"
  end
end

#report_stats ⇒ Object 



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# File 'lib/rspec-background-process/process_pool.rb', line 312

def report_stats
  puts
  puts "Process pool stats (max running: #{@max_running}):"
  @stats.each do |key, stats|
    puts "  #{key}: #{stats.map{|k, v| "#{k}: #{v}"}.join(' ')}"
  end
  puts "Total instances: #{@stats.length}"
  puts "Total starts: #{@stats.reduce(0){|total, stat| total += stat.last[:started]}}"
  puts "Total LRU stops: #{@stats.reduce(0){|total, stat| total += stat.last[:lru_stopped]}}"
  puts "Total extra LRU stops: #{@stats.reduce(0){|total, stat| extra = (stat.last[:lru_stopped] - 1); total += extra if extra > 0; total}}"
end

#stats(name) ⇒ Object 



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# File 'lib/rspec-background-process/process_pool.rb', line 308

def stats(name)
  @stats[name] ||= {}
end