112 lines
3.1 KiB
JavaScript
112 lines
3.1 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'use strict';
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const common = require('../common');
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if (common.isWindows)
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common.skip('dgram clustering is currently not supported on Windows.');
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const NUM_WORKERS = 4;
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const PACKETS_PER_WORKER = 10;
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const assert = require('assert');
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const cluster = require('cluster');
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const dgram = require('dgram');
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if (cluster.isMaster)
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master();
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else
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worker();
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function master() {
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let listening = 0;
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// Fork 4 workers.
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for (let i = 0; i < NUM_WORKERS; i++)
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cluster.fork();
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// Wait until all workers are listening.
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cluster.on('listening', common.mustCall((worker, address) => {
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if (++listening < NUM_WORKERS)
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return;
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// Start sending messages.
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const buf = Buffer.from('hello world');
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const socket = dgram.createSocket('udp4');
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let sent = 0;
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doSend();
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function doSend() {
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socket.send(buf, 0, buf.length, address.port, address.address, afterSend);
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}
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function afterSend() {
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sent++;
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if (sent < NUM_WORKERS * PACKETS_PER_WORKER) {
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doSend();
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} else {
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socket.close();
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}
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}
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}, NUM_WORKERS));
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// Set up event handlers for every worker. Each worker sends a message when
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// it has received the expected number of packets. After that it disconnects.
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for (const key in cluster.workers) {
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if (cluster.workers.hasOwnProperty(key))
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setupWorker(cluster.workers[key]);
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}
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function setupWorker(worker) {
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let received = 0;
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worker.on('message', common.mustCall((msg) => {
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received = msg.received;
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worker.disconnect();
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}));
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worker.on('exit', common.mustCall(() => {
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assert.strictEqual(received, PACKETS_PER_WORKER);
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}));
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}
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}
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function worker() {
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let received = 0;
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// Create udp socket and start listening.
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const socket = dgram.createSocket('udp4');
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socket.on('message', common.mustCall((data, info) => {
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received++;
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// Every 10 messages, notify the master.
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if (received === PACKETS_PER_WORKER) {
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process.send({ received });
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socket.close();
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}
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}, PACKETS_PER_WORKER));
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socket.bind(0);
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}
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