Class: RFlow::DaemonProcess

Inherits:
Object
  • Object
show all
Defined in:
lib/rflow/daemon_process.rb

Direct Known Subclasses

Master

Constant Summary collapse

SIGINFO = 
29

Instance Method Summary collapse

Constructor Details

#initialize(name, role = name, options = {}) ⇒ DaemonProcess

Returns a new instance of DaemonProcess.



7
8
9
10
11
 
# File 'lib/rflow/daemon_process.rb', line 7

def initialize(name, role = name, options = {})
  @name = name
  @role = role
  @pid_file = PIDFile.new(options[:pid_file_path]) if options[:pid_file_path]
end

Instance Method Details

#daemonize! ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/rflow/daemon_process.rb', line 13

def daemonize!
  RFlow.logger.info "#{@name} daemonizing"
  establish_daemon_pipe
  drop_database_connections

  parent = fork
  if parent
    exit_after_daemon_starts
  else
    daemonize_process
  end
end

#run! ⇒ Object 



26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/rflow/daemon_process.rb', line 26

def run!
  write_pid_file
  register_logging_context
  update_process_name
  handle_signals
  spawn_subprocesses
  signal_successful_start

  RFlow.logger.info "#{@role} started"
  run_process
ensure
  unhandle_signals
  remove_pid_file
end

#shutdown!(reason) ⇒ Object 



44
45
46
47
48
49
50
 
# File 'lib/rflow/daemon_process.rb', line 44

def shutdown!(reason)
  RFlow.logger.info "#{@name} shutting down due to #{reason}"
  remove_pid_file
  unhandle_signals
  signal_subprocesses('QUIT')
  RFlow.logger.info "#{@name} exiting"
end

#spawn_subprocesses ⇒ Object 



41
 
# File 'lib/rflow/daemon_process.rb', line 41

def spawn_subprocesses; end

#subprocesses ⇒ Object 



42
 
# File 'lib/rflow/daemon_process.rb', line 42

def subprocesses; []; end