Class: Zold::Remotes

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

Overview

All remotes

Direct Known Subclasses

Empty

Defined Under Namespace

Classes: Empty, Remote

Constant Summary collapse

PORT =

The default TCP port all nodes are supposed to use.

4096
TOLERANCE =

At what amount of errors we delete the remote automatically

8
MAX_NODES =

Default number of nodes to fetch.

16

Instance Method Summary collapse

Constructor Details

#initialize(file:, network: 'test', mutex: Mutex.new, timeout: 16) ⇒ Remotes

Returns a new instance of Remotes.



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# File 'lib/zold/remotes.rb', line 109

def initialize(file:, network: 'test', mutex: Mutex.new, timeout: 16)
  @file = file
  @network = network
  @mutex = mutex
  @timeout = timeout
end

Instance Method Details

#add(host, port = Remotes::PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 148

def add(host, port = Remotes::PORT)
  raise 'Host can\'t be nil' if host.nil?
  raise 'Host can\'t be empty' if host.empty?
  raise 'Port can\'t be nil' if port.nil?
  raise 'Port has to be of type Integer' unless port.is_a?(Integer)
  raise 'Port can\'t be zero' if port.zero?
  raise 'Port can\'t be negative' if port.negative?
  raise 'Port can\'t be over 65536' if port > 0xffff
  modify do |list|
    list + [{ host: host.downcase, port: port, score: 0 }]
  end
end

#all ⇒ Object 



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# File 'lib/zold/remotes.rb', line 116

def all
  @mutex.synchronize do
    list = load
    max_score = list.map { |r| r[:score] }.max || 0
    max_score = 1 if max_score.zero?
    max_errors = list.map { |r| r[:errors] }.max || 0
    max_errors = 1 if max_errors.zero?
    list.sort_by do |r|
      (1 - r[:errors] / max_errors) * 5 + (r[:score] / max_score)
    end.reverse
  end
end

#clean ⇒ Object 



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# File 'lib/zold/remotes.rb', line 129

def clean
  modify { [] }
end

#error(host, port = Remotes::PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 209

def error(host, port = Remotes::PORT)
  raise 'Host can\'t be nil' if host.nil?
  raise 'Port can\'t be nil' if port.nil?
  raise 'Port has to be of type Integer' unless port.is_a?(Integer)
  if_present(host, port) { |r| r[:errors] += 1 }
end

#exists?(host, port = Remotes::PORT) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zold/remotes.rb', line 141

def exists?(host, port = Remotes::PORT)
  raise 'Port has to be of type Integer' unless port.is_a?(Integer)
  raise 'Host can\'t be nil' if host.nil?
  raise 'Port can\'t be nil' if port.nil?
  !load.find { |r| r[:host] == host.downcase && r[:port] == port }.nil?
end

#iterate(log, farm: Farm::Empty.new) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 170

def iterate(log, farm: Farm::Empty.new)
  raise 'Log can\'t be nil' if log.nil?
  raise 'Farm can\'t be nil' if farm.nil?
  list = all
  return if list.empty?
  best = farm.best[0]
  require_relative 'score'
  score = best.nil? ? Score::ZERO : best
  idx = 0
  pool = Concurrent::FixedThreadPool.new([list.count, Concurrent.processor_count * 4].min, max_queue: 0)
  list.each do |r|
    pool.post do
      Thread.current.abort_on_exception = true
      Thread.current.name = "remotes@#{r[:host]}:#{r[:port]}"
      start = Time.now
      begin
        yield Remotes::Remote.new(
          host: r[:host],
          port: r[:port],
          score: score,
          idx: idx,
          log: log,
          network: @network
        )
        idx += 1
        raise 'Took too long to execute' if (Time.now - start).round > @timeout
      rescue StandardError => e
        error(r[:host], r[:port])
        log.info("#{Rainbow("#{r[:host]}:#{r[:port]}").red}: #{e.message} \
in #{(Time.now - start).round}s")
        log.debug(Backtrace.new(e).to_s)
        remove(r[:host], r[:port]) if errors > Remotes::TOLERANCE
      end
    end
  end
  pool.shutdown
  pool.kill unless pool.wait_for_termination(5 * 60)
end

#remove(host, port = Remotes::PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 161

def remove(host, port = Remotes::PORT)
  raise 'Port has to be of type Integer' unless port.is_a?(Integer)
  raise 'Host can\'t be nil' if host.nil?
  raise 'Port can\'t be nil' if port.nil?
  modify do |list|
    list.reject { |r| r[:host] == host.downcase && r[:port] == port }
  end
end

#rescore(host, port, score) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 216

def rescore(host, port, score)
  raise 'Host can\'t be nil' if host.nil?
  raise 'Port can\'t be nil' if port.nil?
  raise 'Score can\'t be nil' if score.nil?
  raise 'Port has to be of type Integer' unless port.is_a?(Integer)
  if_present(host, port) { |r| r[:score] = score }
end

#reset ⇒ Object 



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# File 'lib/zold/remotes.rb', line 133

def reset
  FileUtils.mkdir_p(File.dirname(@file))
  FileUtils.copy(
    File.join(File.dirname(__FILE__), '../../resources/remotes'),
    @file
  )
end