Class: ScoutAgent::Assignment::Start

Inherits:
ScoutAgent::Assignment show all
Defined in:
lib/scout_agent/assignment/start.rb

Instance Attribute Summary

Attributes inherited from ScoutAgent::Assignment

#group, #other_args, #switches, #user

Instance Method Summary collapse

Methods inherited from ScoutAgent::Assignment

#initialize, #prepare_and_execute

Methods included from Tracked

#clear_status, #force_status_database_reload, #status, #status_database, #status_log

Constructor Details

This class inherits a constructor from ScoutAgent::Assignment

Instance Method Details

#execute ⇒ Object 



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# File 'lib/scout_agent/assignment/start.rb', line 10

def execute
  unless Plan.pid_dir.exist?
    unless Plan.build_pid_dir(group.gid)
      abort_with_missing_pid_dir
    end
  end
  
  unless switch_group_and_user
    abort_with_wrong_group_or_user
  end
  
  unless test_server_connection(:quiet)
    abort_with_cannot_connect
  end
  
  unless Plan.valid?            and
         Plan.pid_dir.exist?    and
         Plan.pid_dir.readable? and
         Plan.pid_dir.writable?
    abort_with_missing_resources
  end
  
  running_mode = Plan.run_as_daemon? ? " as a daemon" : ""
  puts "Starting #{ScoutAgent.proper_agent_name}#{running_mode}..."
  card = IDCard.new(:lifeline)
  unless card.authorize { not Plan.run_as_daemon? or daemonize }
    other_process = card.pid
    if other_process and other_process != Process.pid
      abort_with_other_process_running(other_process)
    else
      abort_with_failure_to_daemonize
    end
  end
  
  log = ScoutAgent.prepare_wire_tap(:lifeline)
  log.info("Loading monitors.")
  
  lifelines = %w[master communication].map { |agent|
    Lifeline.new(agent, log)
  }
  %w[TERM INT].each do |signal|
    trap(signal) do
      Thread.new do
        lifelines.each { |line| line.terminate }
        Process.waitall
      end
    end
  end
  lifelines.each { |line| line.launch_and_monitor }
  
  lifelines.each { |line| line.join }
end