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 131

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 169

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 137

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 148

def clean
  modify { [] }
end

#error(host, port = PORT) ⇒ Object 



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

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 161

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 193

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 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
      )
      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 240

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 152

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 236

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 182

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 227

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