Class: Deamons::Ngrok

Inherits:
Object
  • Object
show all
Defined in:
lib/Deamons/ngrok.rb

Overview

Simple process to add wash trades to a market in order to simulate trade matching for QA and dev

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Ngrok

Returns a new instance of Ngrok.



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# File 'lib/Deamons/ngrok.rb', line 8

def initialize
  Process.fork do
    Process.daemon(true)
    pid = Process.pid
    redirect("#{pid}.outfile", "#{pid}.errfile")
    write_pid_file(pid, "#{pid}.pid")
    start
  end
  puts "Starting Ngrok..."
end

Instance Method Details

#redirect(outfile, errfile) ⇒ TrueClass

Send stdout and stderr to log files for the child process

Parameters:

  • outfile (String)
  • errfile (String)

Returns:

  • (TrueClass) 


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# File 'lib/Deamons/ngrok.rb', line 44

def redirect(outfile, errfile)
  $stdin.reopen '/dev/null'
  out = File.new outfile, "a"
  err = File.new errfile, "a"
  $stdout.reopen out
  $stderr.reopen err
  $stdout.sync = $stderr.sync = true
end

#start ⇒ Object 



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# File 'lib/Deamons/ngrok.rb', line 19

def start
  cmd = "#{ENV.fetch('NGROK')}./ngrok http 8545"
  system(cmd)
  rescue ::StandardError => e
    STDERR.puts e.backtrace
    STDERR.puts '\n'
end

#write_pid_file(pid, pidfile) ⇒ Integer and File

Attempts to write the pid of the forked process to the pid file.

Parameters:

  • pid (Integer)
  • pidfile (String)

Returns:

  • (Integer and File) 


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# File 'lib/Deamons/ngrok.rb', line 31

def write_pid_file(pid, pidfile)
  File.open pidfile, "w" do |f|
    f.write pid
  end
rescue ::Exception => e
  $stderr.puts "While writing the PID to file, unexpected #{e.class}: #{e}"
  Process.kill "HUP", pid
end