Class: Jah::Agent

Inherits:
Object
  • Object
show all
Defined in:
lib/jah/agent.rb

Constant Summary collapse

PID_FILE = 
File.join("/tmp", "jah.pid")

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = nil) ⇒ Agent

, config)



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# File 'lib/jah/agent.rb', line 15

def initialize(options=nil)#, config)
  if Opt.daemon?
    puts "Jah starting in background.."
    fork do
      daemonize
      run_agent_run
    end
    exit
  end
  run_agent_run
end

Class Method Details

.config ⇒ Object Also known as: install 



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# File 'lib/jah/agent.rb', line 64

def self.config
  Install.new
end

.restart ⇒ Object 



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# File 'lib/jah/agent.rb', line 58

def self.restart
  stop
  sleep 2
  start
end

.start ⇒ Object 



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# File 'lib/jah/agent.rb', line 39

def self.start
  if File.exists?(PID_FILE)
    puts "Jah already running...#{PID_FILE}"
  else
    new
  end
end

.stop ⇒ Object 



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# File 'lib/jah/agent.rb', line 47

def self.stop
  if File.exists?(PID_FILE)
    pid = File.read(PID_FILE)
    puts "Stopping #{pid}"
    `kill #{pid}`
  else
    puts "Jah not running..."
    exit
  end
end

Instance Method Details

#daemonize ⇒ Object 



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# File 'lib/jah/agent.rb', line 72

def daemonize
  begin
    File.open(pid_file, File::CREAT|File::EXCL|File::WRONLY) do |pid|
      pid.puts $$
    end
    at_exit do
      begin
        File.unlink(pid_file)
      rescue
        Log.error "Unable to unlink pid file: #{$!.message}"
      end
    end
  rescue
    pid = File.read(pid_file).strip.to_i rescue "unknown"
    running = true
    begin
      Process.kill(0, pid)
      if stat = File.stat(pid_file)
        if mtime = stat.mtime
          if Time.now - mtime > 25 * 60 # assume process is hung after 25m
            Log.info "Trying to KILL an old process..."
            Process.kill("KILL", pid)
            running = false
          end
        end
      end
    rescue Errno::ESRCH
      running = false
    rescue
      # do nothing, we didn't have permission to check the running process
    end
    if running
      if pid == "unknown"
        Log.warn "Could not create or read PID file. " +
                 "You may need to the path to the config directory. " +
                 "See: http://scoutapp.com/help#data_file"
      else
        Log.warn "Process #{pid} was already running"
      end
      exit
    else
      Log.info "Stale PID file found. Clearing it and reloading..."
      File.unlink(pid_file) rescue nil
      retry
    end
  end

  self
end

#pid_file ⇒ Object 



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# File 'lib/jah/agent.rb', line 27

def pid_file
  @pidfile ||= PID_FILE
end

#run_agent_run ⇒ Object 



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# File 'lib/jah/agent.rb', line 31

def run_agent_run
  case Opt.mode # @mode
  when "xmpp" then  XmppAgent.new.run
  when "post" then  PostAgent.new.run
  else DumpAgent.new
  end
end