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Contents
module Workhorse
class Daemon::ShellHandler
def self.run(options = {}, &block)
unless ARGV.count == 1
usage
exit 99
end
lockfile_path = options.delete(:lockfile) || 'workhorse.lock'
lockfile = File.open(lockfile_path, 'a')
lockfile.flock(File::LOCK_EX || File::LOCK_NB)
daemon = Workhorse::Daemon.new(options, &block)
begin
case ARGV.first
when 'start'
exit daemon.start
when 'stop'
exit daemon.stop
when 'kill'
exit daemon.stop(true)
when 'status'
exit daemon.status
when 'watch'
exit daemon.watch
when 'restart'
exit daemon.restart
when 'usage'
usage
exit 99
else
usage
end
exit 0
rescue => e
warn "#{e.message}\n#{e.backtrace.join("\n")}"
exit 99
ensure
lockfile.flock(File::LOCK_UN)
end
end
def self.usage
warn <<USAGE
Usage: #{$PROGRAM_NAME} start|stop|status|watch|restart|usage
Options:
start
Start the daemon
stop
Stop the daemon
kill
Kill the daemon
status
Query the status of the daemon. Exit with status 1 if any worker is
not running.
watch
Checks the status (running or stopped) and whether it is as
expected. Starts the daemon if it is expected to run but is not.
restart
Shortcut for consecutive 'stop' and 'start'.
usage
Show this message
Exit status:
0 if OK,
1 if at least one worker has an unexpected status,
99 on all other errors.
USAGE
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems