Class: Zold::Remotes

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

Overview

All remotes

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', timeout: 60) ⇒ Remotes

Returns a new instance of Remotes.



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# File 'lib/zold/remotes.rb', line 130

def initialize(file:, network: 'test', timeout: 60)
  @file = file
  @network = network
  @timeout = timeout
end

Instance Method Details

#add(host, port = PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 168

def add(host, port = 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, errors: 0 }]
  end
end

#all ⇒ Object 



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# File 'lib/zold/remotes.rb', line 136

def all
  list = Futex.new(@file).open(false) { 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 147

def clean
  modify { [] }
end

#error(host, port = PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 218

def error(host, port = 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 = PORT) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zold/remotes.rb', line 160

def exists?(host, port = 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?
  list = Futex.new(@file).open(false) { load }
  !list.find { |r| r[:host] == host.downcase && r[:port] == port }.nil?
end

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

Go through the list of remotes and call a provided block for each of them. See how it’s used, for example, in fetch.rb.



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# File 'lib/zold/remotes.rb', line 192

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?
  ThreadPool.new('remotes', log: log).run(Concurrent.processor_count * 4, all) do |r, idx|
    Thread.current.name = "remotes-#{idx}@#{r[:host]}:#{r[:port]}"
    start = Time.now
    best = farm.best[0]
    begin
      yield Remotes::Remote.new(
        host: r[:host],
        port: r[:port],
        score: best.nil? ? Score::ZERO : best,
        idx: idx,
        log: log,
        network: @network
      )
      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 #{Age.new(start)}")
      log.debug(Backtrace.new(e).to_s)
      remove(r[:host], r[:port]) if r[:errors] > TOLERANCE
    end
  end
end

#master?(host, port) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zold/remotes.rb', line 238

def master?(host, port)
  !MASTERS.find { |r| r[0] == host && r[1].to_i == port }.nil?
end

#masters ⇒ Object 



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# File 'lib/zold/remotes.rb', line 151

def masters
  MASTERS.each do |r|
    if block_given?
      next unless yield(r[0], r[1].to_i)
    end
    add(r[0], r[1].to_i)
  end
end

#mtime ⇒ Object 



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# File 'lib/zold/remotes.rb', line 234

def mtime
  File.exist?(@file) ? File.mtime(@file) : Time.now
end

#remove(host, port = PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 181

def remove(host, port = 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 225

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 'Score has to be of type Integer' unless score.is_a?(Integer)
  if_present(host, port) { |r| r[:score] = score }
end