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# File 'lib/daemonite.rb', line 39
def daemonism(opts={},&block)
@at_exit = nil
@at_start = nil
if File.exists?(opts[:basepath] + '/' + opts[:conffile])
opts.merge!(Psych::load_file(opts[:basepath] + '/' + opts[:conffile]))
end
Dir.chdir(opts[:basepath])
opts[:block] = nil
instance_exec(opts,&block) if block_given?
if opts[:cmdl_parsing]
opts[:cmdl_operation] = "start"
ARGV.options { |opt|
opt.summary_indent = ' ' * 4
opt.banner = "Usage:\n#{opt.summary_indent}ruby #{$PROGRAM_NAME} [options] start|stop|restart|info" + (opts[:runtime_cmds].length > 0 ? '|' : '') + opts[:runtime_cmds].map{|ro| ro[0]}.join('|') + "\n"
opts[:runtime_opts].each do |ro|
opt.on(*ro)
end
opt.on("--verbose", "-v", "Do not daemonize. Write ouput to console.") { opts[:verbose] = true }
opt.on("--config=FNAME", "-cFNAME", "Config file location.") { |f,a|
if File.exists?(opts[:basepath] + '/' + f)
opts.merge!(Psych::load_file(opts[:basepath] + '/' + f))
end
}
opt.on("--help", "-h", "This text.") { puts opt; ::Kernel::exit }
opt.separator(opt.summary_indent + "start|stop|restart|info".ljust(opt.summary_width+1) + "Do operation start, stop, restart or get information.")
opts[:runtime_cmds].each do |ro|
opt.separator(opt.summary_indent + ro[0].ljust(opt.summary_width+1) + ro[1])
end
opt.parse!
}
unless (%w{start stop restart info} + opts[:runtime_cmds].map{|ro| ro[0] }).include?(ARGV[0])
puts ARGV.options
::Kernel::exit
end
opts[:cmdl_operation] = ARGV[0]
end
opts[:runtime_proc].call(opts) unless opts[:runtime_proc].nil?
pid = File.read(opts[:basepath] + '/' + opts[:pidfile]).to_i rescue pid = -1
status = Proc.new do
begin
Process.getpgid pid
true
rescue Errno::ESRCH
false
end
end
unless @@daemonism_restart
if opts[:cmdl_operation] == "info" && status.call == false
puts "Server #{opts[:cmdl_info].nil? ? '' : '(' + opts[:cmdl_info].to_s + ') '}not running"
::Kernel::exit
end
if opts[:cmdl_operation] == "info" && status.call == true
puts "Server #{opts[:cmdl_info].nil? ? '' : '(' + opts[:cmdl_info].to_s + ') '}running as #{pid}"
begin
stats = `ps -o "vsz,rss,lstart,time" -p #{pid}`.split("\n")[1].strip.split(/ +/)
puts "Virtual: #{"%0.2f" % (stats[0].to_f/1024)} MiB"
puts "Resident: #{"%0.2f" % (stats[1].to_f/1024)} MiB"
puts "Started: #{stats[2..-2].join(' ')}"
puts "CPU Time: #{stats.last}"
rescue
end
::Kernel::exit
end
if %w{start}.include?(opts[:cmdl_operation]) && status.call == true
puts "Server #{opts[:cmdl_info].nil? ? '' : '(' + opts[:cmdl_info].to_s + ') '}already started"
::Kernel::exit
end
end
unless @@daemonism_restart
if %w{stop restart}.include?(opts[:cmdl_operation])
if status.call == false
puts "Server #{opts[:cmdl_info].nil? ? '' : '(' + opts[:cmdl_info].to_s + ') '}maybe not started?"
else
puts "Server #{opts[:cmdl_info].nil? ? '' : '(' + opts[:cmdl_info].to_s + ') '}stopped"
puts "Waiting while server goes down ..."
while status.call
Process.kill "SIGTERM", pid
sleep 0.3
end
end
::Kernel::exit unless opts[:cmdl_operation] == "restart"
end
end
unless @@daemonism_restart
opts[:runtime_cmds].each do |ro|
ro[2].call(status.call) if opts[:cmdl_operation] == ro[0]
end
@@daemonism_restart = true
retain = $stdout.dup
Process.daemon unless opts[:verbose]
retain.puts "Server #{opts[:cmdl_info].nil? ? '' : '(' + opts[:cmdl_info].to_s + ') '}started as PID:#{Process.pid}"
File.write(opts[:basepath] + '/' + opts[:pidfile],Process.pid)
Dir.chdir(opts[:basepath])
::Kernel::at_exit do
File.unlink(opts[:basepath] + '/' + opts[:pidfile])
@at_exit.call(opts) if @at_exit
end
end
end
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