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 107

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 144

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
  raise "#{host}:#{port} already exists" if exists?(host, port)
  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 114

def all
  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

#clean ⇒ Object 



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# File 'lib/zold/remotes.rb', line 125

def clean
  modify { [] }
end

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



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# File 'lib/zold/remotes.rb', line 215

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

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



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# File 'lib/zold/remotes.rb', line 206

def errors(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)
  list = load
  raise "#{host}:#{port} is absent among #{list.count} remotes" unless exists?(host, port)
  list.find { |r| r[:host] == host.downcase && r[:port] == port }[:errors]
end

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

Returns:

  • (Boolean) 


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# File 'lib/zold/remotes.rb', line 137

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 167

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?
  return if all.empty?
  best = farm.best[0]
  require_relative 'score'
  score = best.nil? ? Score::ZERO : best
  idx = 0
  pool = Concurrent::FixedThreadPool.new([all.count, Concurrent.processor_count * 4].min, max_queue: 0)
  all.each do |r|
    pool.post do
      Thread.current.abort_on_exception = true
      Thread.current.name = 'remotes'
      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])
        errors = errors(r[:host], r[:port])
        log.info("#{Rainbow("#{r[:host]}:#{r[:port]}").red}: #{e.message} \
in #{(Time.now - start).round}s; errors=#{errors}")
        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 158

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 222

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 129

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