kafka-dance-api/safely-exit.js

const errorTypes = ['unhandledRejection', 'uncaughtException']
const signalTraps = ['SIGTERM', 'SIGINT', 'SIGUSR2']

const disconnectAll = async (consumers, clusters) => {
  await Promise.all([
    ...Object.values(clusters).map(async cluster => cluster.admin.disconnect()),
    ...Array.from(consumers.values()).map(async consumer => consumer.disconnect())
  ])
}

const buildEscape = (consumers, clusters) => {
  const disconnect = async () => disconnectAll(consumers, clusters)
  errorTypes.map(type => {
    process.on(type, async e => {
      try {
        console.log(`process.on ${type}`)
        console.error(e)
        await disconnect()
        process.exit(0)
      } catch (_) {
        process.exit(1)
      }
    })
  })

  signalTraps.map(type => {
    process.once(type, async () => {
      try {
        console.log('signalTrap: ' + type)
        await disconnect()
      } finally {
        process.kill(process.pid, type)
      }
    })
  })
}

module.exports = {
  buildEscape
}