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Contents
module Salemove
module ProcessHandler
class ProcessMonitor
def start
init_signal_handlers
@state = :running
end
def stop
@state = :stopping if alive?
end
def shutdown
@state = :stopped
end
def running?
@state == :running
end
def alive?
@state != :stopped
end
private
def init_signal_handlers
init_hup_signal
init_quit_signal
init_int_signal
init_term_signal
end
# Many daemons will reload their configuration files and reopen their
# logfiles instead of exiting when receiving this signal.
def init_hup_signal
trap :HUP do
puts 'SIGHUP: not implemented'
end
end
# Interrupts a process. (The default action is to terminate gracefully).
def init_int_signal
trap :INT do
puts 'Exiting process gracefully!'
stop
end
end
# Terminates a process immediately.
def init_term_signal
trap :TERM do
exit
end
end
# Terminates a process. This is different from both SIGKILL and SIGTERM
# in the sense that it generates a core dump of the process and also
# cleans up resources held up by a process. Like SIGINT, this can also
# be sent from the terminal as input characters.
def init_quit_signal
trap :QUIT do
exit
end
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems