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 125

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 163

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 131

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 142

def clean
  modify { [] }
end

#default?(host, port) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zold/remotes.rb', line 241

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

#defaults ⇒ Object 



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# File 'lib/zold/remotes.rb', line 146

def defaults
  DEFS.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

#error(host, port = PORT) ⇒ Object 



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# File 'lib/zold/remotes.rb', line 222

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 155

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 



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# File 'lib/zold/remotes.rb', line 185

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?
  list = all
  return if list.empty?
  best = farm.best[0]
  score = best.nil? ? Score::ZERO : best
  idx = 0
  pool = Concurrent::FixedThreadPool.new([list.count, Concurrent.processor_count * 4].min, max_queue: 0)
  list.each do |r|
    pool.post do
      Thread.current.abort_on_exception = true
      Thread.current.name = "remotes-#{idx}@#{r[:host]}:#{r[:port]}"
      start = Time.now
      begin
        yield Remotes::Remote.new(
          host: r[:host],
          port: r[:port],
          score: score,
          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 errors > TOLERANCE
      end
    end
    idx += 1
  end
  pool.shutdown
  pool.kill unless pool.wait_for_termination(5 * 60)
end

#mtime ⇒ Object 



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# File 'lib/zold/remotes.rb', line 237

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 176

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 229

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