Module: Revenant::Daemon

Defined in:
lib/plugins/daemon.rb

Overview

“startup” and “shutdown” are the methods Task expects modules like this one to replace.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.install(task) ⇒ Object

Installs this plugin in the given task. Out of the box, this is always to provide daemon support. install is expected to know when to do nothing.



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# File 'lib/plugins/daemon.rb', line 11

def self.install(task)
  if task.daemon?
    class << task
      include ::Revenant::Daemon
    end
  end
end

Instance Method Details

#log_file ⇒ Object 



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# File 'lib/plugins/daemon.rb', line 49

def log_file
  @options[:log_file]
end

#pid_file ⇒ Object

Everything else is a daemon implementation detail.



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# File 'lib/plugins/daemon.rb', line 45

def pid_file
  @options[:pid_file] ||= File.join("/tmp", "#{@name}.pid")
end

#script ⇒ Object 



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# File 'lib/plugins/daemon.rb', line 53

def script
  @options[:script] ||= File.expand_path($0)
end

#shutdown ⇒ Object 



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# File 'lib/plugins/daemon.rb', line 25

def shutdown
  @pid.remove

  if restart_pending?
    log "#{name} is restarting"
    if @original_dir
      Dir.chdir @original_dir
    end
    system script
  else
    log "#{name} is shutting down"
  end

  exit 0
end

#startup ⇒ Object 



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# File 'lib/plugins/daemon.rb', line 19

def startup
  @original_dir = ::Revenant.working_directory
  daemonize
  log "#{name} is starting"
end