Class: Zold::Farm

Inherits:
Object
  • Object
show all
Defined in:
lib/zold/node/farm.rb

Overview

Farm

Defined Under Namespace

Classes: Empty

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(invoice, cache, log: Log::Quiet.new) ⇒ Farm

Returns a new instance of Farm.



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# File 'lib/zold/node/farm.rb', line 41

def initialize(invoice, cache, log: Log::Quiet.new)
  @log = log
  @cache = cache
  @invoice = invoice
  @scores = []
  @threads = []
  @best = []
  @semaphore = Mutex.new
end

Instance Attribute Details

#best ⇒ Object (readonly)

Returns the value of attribute best.



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# File 'lib/zold/node/farm.rb', line 40

def best
  @best
end

Instance Method Details

#start(host, port, strength: 8, threads: 8) ⇒ Object 



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# File 'lib/zold/node/farm.rb', line 59

def start(host, port, strength: 8, threads: 8)
  @log.debug('Zero-threads farm won\'t score anything!') if threads.zero?
  @best << Score.new(Time.now, host, port, @invoice, strength: strength)
  @scores = Queue.new
  history.each { |s| @scores << s }
  @log.debug("#{@scores.size} scores pre-loaded") unless @scores.size.zero?
  @threads = (1..threads).map do |t|
    Thread.new do
      VerboseThread.new(@log).run do
        Thread.current.name = "farm-#{t}"
        loop do
          if @scores.length < 4
            @scores << Score.new(
              Time.now, host, port, @invoice,
              strength: strength
            )
          end
          s = @scores.pop
          next unless s.valid?
          next if s.expired?
          next if s.strength < strength
          @semaphore.synchronize do
            save(s)
            before = @best.map(&:value).max
            @best << s
            after = @best.map(&:value).max
            @best.reject! { |b| b.value < after }
            @log.debug("#{Thread.current.name}: best score is #{@best[0]}") if before != after
          end
          @scores << s.next
        end
      end
    end
  end
  @log.debug("Farm started with #{threads} threads at #{host}:#{port}")
end

#stop ⇒ Object 



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# File 'lib/zold/node/farm.rb', line 96

def stop
  @threads.each do |t|
    t.exit
    @log.debug("Thread #{t.name} terminated")
  end
  @log.debug('Farm stopped')
end

#to_json ⇒ Object 



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# File 'lib/zold/node/farm.rb', line 51

def to_json
  {
    threads: @threads.count,
    scores: @scores.size,
    best: @best.count
  }
end