Function primary

test/parallel/test-cluster-dgram-1.js:40–91

()

function primary() {
  let listening = 0;

  // Fork 4 workers.
  for (let i = 0; i < NUM_WORKERS; i++)
    cluster.fork();

  // Wait until all workers are listening.
  cluster.on('listening', common.mustCall((worker, address) => {
    if (++listening < NUM_WORKERS)
      return;

    // Start sending messages.
    const buf = Buffer.from('hello world');
    const socket = dgram.createSocket('udp4');
    let sent = 0;
    doSend();

    function doSend() {
      socket.send(buf, 0, buf.length, address.port, address.address, afterSend);
    }

    function afterSend() {
      sent++;
      if (sent < NUM_WORKERS * PACKETS_PER_WORKER) {
        doSend();
      } else {
        socket.close();
      }
    }
  }, NUM_WORKERS));

  // Set up event handlers for every worker. Each worker sends a message when
  // it has received the expected number of packets. After that it disconnects.
  for (const key in cluster.workers) {
    if (Object.hasOwn(cluster.workers, key))
      setupWorker(cluster.workers[key]);
  }

  function setupWorker(worker) {
    let received = 0;

    worker.on('message', common.mustCall((msg) => {
      received = msg.received;
      worker.disconnect();
    }));

    worker.on('exit', common.mustCall(() => {
      assert.strictEqual(received, PACKETS_PER_WORKER);
    }));
  }
}


function worker() {