mirror of https://gitee.com/openkylin/nodejs.git
95 lines
2.9 KiB
JavaScript
95 lines
2.9 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 cluster = require('cluster');
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const dgram = require('dgram');
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const assert = require('assert');
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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 received = 0;
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// Start listening on a socket.
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const socket = dgram.createSocket('udp4');
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socket.bind({ port: 0 }, common.mustCall(() => {
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// Fork workers.
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for (let i = 0; i < NUM_WORKERS; i++) {
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const worker = cluster.fork();
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worker.send({ port: socket.address().port });
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}
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}));
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// Disconnect workers when the expected number of messages have been
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// received.
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socket.on('message', common.mustCall((data, info) => {
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received++;
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if (received === PACKETS_PER_WORKER * NUM_WORKERS) {
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// Close the socket.
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socket.close();
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// Disconnect all workers.
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cluster.disconnect();
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}
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}, NUM_WORKERS * PACKETS_PER_WORKER));
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}
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function worker() {
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// Create udp socket and send packets to master.
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const socket = dgram.createSocket('udp4');
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const buf = Buffer.from('hello world');
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// This test is intended to exercise the cluster binding of udp sockets, but
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// since sockets aren't clustered when implicitly bound by at first call of
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// send(), explicitly bind them to an ephemeral port.
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socket.bind(0);
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process.on('message', common.mustCall((msg) => {
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assert(msg.port);
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// There is no guarantee that a sent dgram packet will be received so keep
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// sending until disconnect.
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const interval = setInterval(() => {
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socket.send(buf, 0, buf.length, msg.port, '127.0.0.1');
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}, 1);
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cluster.worker.on('disconnect', () => {
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clearInterval(interval);
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});
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}));
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}
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