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
RUNTIME_LIMIT =

After this limit, the remote runtime must be recorded

16
MAX_NODES =

Default number of nodes to fetch.

16

Instance Method Summary collapse

Constructor Details

#initialize(file, network: 'test') ⇒ Remotes

Returns a new instance of Remotes.



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# File 'lib/zold/remotes.rb', line 114

def initialize(file, network: 'test')
  raise 'File can\'t be nil' if file.nil?
  @file = file
  raise 'Network can\'t be nil' if network.nil?
  @network = network
  @mutex = Mutex.new
end

Instance Method Details

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



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# File 'lib/zold/remotes.rb', line 152

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 < 0
  raise 'Port can\'t be over 65536' if port > 0xffff
  raise "#{host}:#{port} already exists" if exists?(host, port)
  list = load
  list << { host: host.downcase, port: port, score: 0 }
  list.uniq! { |r| "#{r[:host]}:#{r[:port]}" }
  save(list)
end

#all ⇒ Object 



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# File 'lib/zold/remotes.rb', line 122

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 133

def clean
  save([])
end

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



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# File 'lib/zold/remotes.rb', line 210

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)
  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] += 1
  save(list)
end

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



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# File 'lib/zold/remotes.rb', line 201

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 145

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 177

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?
  best = farm.best[0]
  require_relative 'score'
  score = best.nil? ? Score::ZERO : best
  idx = 0
  all.each do |r|
    start = Time.now
    begin
      yield Remotes::Remote.new(r[:host], r[:port], score, idx, log: log, network: @network)
      idx += 1
      raise 'Took too long to execute' if (Time.now - start).round > Remotes::RUNTIME_LIMIT
    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

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



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# File 'lib/zold/remotes.rb', line 167

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?
  raise "#{host}:#{port} is absent" unless exists?(host, port)
  list = load
  list.reject! { |r| r[:host] == host.downcase && r[:port] == port }
  save(list)
end

#rescore(host, port, score) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 220

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

#reset ⇒ Object 



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

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