Class: ProcessBalancer::CLI

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/process_balancer/cli.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

#hostname, #identity, #logger, #redis, #start_thread, #watchdog

Instance Attribute Details

#environment ⇒ Object (readonly)

Returns the value of attribute environment.



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# File 'lib/process_balancer/cli.rb', line 17

def environment
  @environment
end

#manager ⇒ Object (readonly)

Returns the value of attribute manager.



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# File 'lib/process_balancer/cli.rb', line 17

def manager
  @manager
end

Class Method Details

.instance ⇒ Object 



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# File 'lib/process_balancer/cli.rb', line 19

def self.instance
  @instance ||= new
end

Instance Method Details

#parse(args = ARGV) ⇒ Object 



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# File 'lib/process_balancer/cli.rb', line 23

def parse(args = ARGV)
  setup_options(args)
  initialize_logger
  validate!
end

#run ⇒ Object 



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# File 'lib/process_balancer/cli.rb', line 29

def run
  boot_system
  logger.info "Booted Rails #{::Rails.version} application in #{environment} environment" if rails_app?
  Thread.current.name = 'main'

  self_read, self_write = IO.pipe
  signals               = %w[INT TERM TTIN TSTP USR1 USR2]

  signals.each do |sig|
    trap sig do
      self_write.write("#{sig}\n")
    end
  rescue ArgumentError
    logger.info "Signal #{sig} not supported"
  end

  logger.info "Running in #{RUBY_DESCRIPTION}"

  if options[:job_sets].empty?
    logger.error 'No jobs configured! Configure your jobs in the configuration file.'
  else
    logger.info 'Configured jobs'
    options[:job_sets].each do |config|
      logger.info " - #{config[:id]}"
    end
  end

  @manager = ProcessBalancer::Manager.new(options)

  begin
    @manager.run

    while (readable_io = IO.select([self_read]))
      signal = readable_io.first[0].gets.strip
      handle_signal(signal)
    end
  rescue Interrupt
    logger.info 'Shutting down'
    @manager.stop
    logger.info 'Bye!'

    # Explicitly exit so busy Processor threads wont block process shutdown.
    exit(0)
  end
end