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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
// This test starts two clustered HTTP servers on the same port. It expects the
// first cluster to succeed and the second cluster to fail with EADDRINUSE.
//
// The test may seem complex but most of it is plumbing that routes messages
// from the child processes back to the supervisor. As a tree it looks something
// like this:
//
// <supervisor>
// / \
// <master 1> <master 2>
// / \
// <worker 1> <worker 2>
//
// The first worker starts a server on a fixed port and fires a ready message
// that is routed to the second worker. When it tries to bind, it expects to
// see an EADDRINUSE error.
//
// See https://github.com/joyent/node/issues/2721 for more details.
const common = require('../common');
const assert = require('assert');
const cluster = require('cluster');
const fork = require('child_process').fork;
const http = require('http');
const id = process.argv[2];
if (!id) {
const a = fork(__filename, ['one']);
const b = fork(__filename, ['two']);
a.on('exit', common.mustCall((c) => {
if (c) {
b.send('QUIT');
throw new Error(`A exited with ${c}`);
}
}));
b.on('exit', common.mustCall((c) => {
if (c) {
a.send('QUIT');
throw new Error(`B exited with ${c}`);
}
}));
a.on('message', common.mustCall((m) => {
assert.strictEqual(m.msg, 'READY');
b.send({ msg: 'START', port: m.port });
}));
b.on('message', common.mustCall((m) => {
assert.strictEqual(m, 'EADDRINUSE');
a.send('QUIT');
b.send('QUIT');
}));
} else if (id === 'one') {
if (cluster.isMaster) return startWorker();
const server = http.createServer(common.mustNotCall());
server.listen(0, common.mustCall(() => {
process.send({ msg: 'READY', port: server.address().port });
}));
process.on('message', common.mustCall((m) => {
if (m === 'QUIT') process.exit();
}));
} else if (id === 'two') {
if (cluster.isMaster) return startWorker();
const server = http.createServer(common.mustNotCall());
process.on('message', common.mustCall((m) => {
if (m === 'QUIT') process.exit();
assert.strictEqual(m.msg, 'START');
server.listen(m.port, common.mustNotCall());
server.on('error', common.mustCall((e) => {
assert.strictEqual(e.code, 'EADDRINUSE');
process.send(e.code);
}));
}, 2));
} else {
assert(0); // Bad command line argument
}
function startWorker() {
const worker = cluster.fork();
worker.on('exit', process.exit);
worker.on('message', process.send.bind(process));
process.on('message', worker.send.bind(worker));
}
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