const Signaler = require('signaleries');

const exit = new Signaler();
exit.before([function(){
  // logic code
  process.exit(0); // exit with the success code
}]);
// also: exit.before(fn1, context); context default: null
//       exit.before(fn2, context);

exit.SIGTERM(); // start to listen the signal of sigterm
// also work if the lowerEventName specified `true` value
// exit.sigterm(); 

exit.emit('SIGTERM'/* sigterm */); // Trigger event