Class: Zold::Remotes

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

Overview

All remotes

Defined Under Namespace

Classes: Empty

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 139

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 173

def add(host, port = PORT)
  assert_host_info(host, port)
  modify do |list|
    list + [{ host: host.downcase, port: port, score: 0, errors: 0 }]
  end
  unerror(host, port)
end

#all ⇒ Object 



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# File 'lib/zold/remotes.rb', line 145

def all
  list = Futex.new(@file).open(false) { load }
  max_score = list.empty? ? 0 : list.max_by { |r| r[:score] }[:score]
  max_score = 1 if max_score.zero?
  max_errors = list.empty? ? 0 : list.max_by { |r| r[:errors] }[:errors]
  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 156

def clean
  modify { [] }
end

#error(host, port = PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 223

def error(host, port = PORT)
  assert_host_info(host, port)
  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 167

def exists?(host, port = PORT)
  assert_host_info(host, port)
  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, threads: 1) ⇒ 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 190

def iterate(log, farm: Farm::Empty.new, threads: 1)
  raise 'Log can\'t be nil' if log.nil?
  raise 'Farm can\'t be nil' if farm.nil?
  Hands.exec(threads, all) do |r, idx|
    Thread.current.name = "remotes-#{idx}@#{r[:host]}:#{r[:port]}"
    start = Time.now
    best = farm.best[0]
    node = RemoteNode.new(
      host: r[:host],
      port: r[:port],
      score: best.nil? ? Score::ZERO : best,
      idx: idx,
      master: master?(r[:host], r[:port]),
      log: log,
      network: @network
    )
    begin
      yield node
      raise 'Took too long to execute' if (Time.now - start).round > @timeout
      unerror(r[:host], r[:port]) if node.touched
    rescue StandardError => e
      error(r[:host], r[:port])
      if e.is_a?(RemoteNode::CantAssert) || e.is_a?(Fetch::Error)
        log.debug("#{Rainbow(node).red}: \"#{e.message.strip}\" in #{Age.new(start)}")
      else
        log.info("#{Rainbow(node).red}: \"#{e.message.strip}\" in #{Age.new(start)}")
        log.debug(Backtrace.new(e).to_s)
      end
      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 247

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

#masters ⇒ Object 



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

def masters
  MASTERS.each do |r|
    next if block_given? && !yield(r[:host], r[:port])
    add(r[:host], r[:port])
  end
end

#mtime ⇒ Object 



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# File 'lib/zold/remotes.rb', line 243

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)
  assert_host_info(host, port)
  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 235

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

#unerror(host, port = PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 228

def unerror(host, port = PORT)
  assert_host_info(host, port)
  if_present(host, port) do |remote|
    remote[:errors] -= 1 if remote[:errors].positive?
  end
end