Current File : /home/vacivi36/vittasync.vacivitta.com.br/vittasync/node/test/parallel/test-cluster-message.js
// 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';
const common = require('../common');
const assert = require('assert');
const cluster = require('cluster');
const net = require('net');
function forEach(obj, fn) {
Object.keys(obj).forEach(function(name, index) {
fn(obj[name], name);
});
}
if (cluster.isWorker) {
// Create a tcp server. This will be used as cluster-shared-server and as an
// alternative IPC channel.
const server = net.Server();
let socket, message;
function maybeReply() {
if (!socket || !message) return;
// Tell primary using TCP socket that a message is received.
socket.write(JSON.stringify({
code: 'received message',
echo: message
}));
}
server.on('connection', function(socket_) {
socket = socket_;
maybeReply();
// Send a message back over the IPC channel.
process.send('message from worker');
});
process.on('message', function(message_) {
message = message_;
maybeReply();
});
server.listen(0);
} else if (cluster.isPrimary) {
const checks = {
global: {
'receive': false,
'correct': false
},
primary: {
'receive': false,
'correct': false
},
worker: {
'receive': false,
'correct': false
}
};
let client;
const check = (type, result) => {
checks[type].receive = true;
checks[type].correct = result;
console.error('check', checks);
let missing = false;
forEach(checks, function(type) {
if (type.receive === false) missing = true;
});
if (missing === false) {
console.error('end client');
client.end();
}
};
// Spawn worker
const worker = cluster.fork();
// When a IPC message is received from the worker
worker.on('message', function(message) {
check('primary', message === 'message from worker');
});
cluster.on('message', function(worker_, message) {
assert.strictEqual(worker_, worker);
check('global', message === 'message from worker');
});
// When a TCP server is listening in the worker connect to it
worker.on('listening', function(address) {
client = net.connect(address.port, function() {
// Send message to worker.
worker.send('message from primary');
});
client.on('data', function(data) {
// All data is JSON
data = JSON.parse(data.toString());
if (data.code === 'received message') {
check('worker', data.echo === 'message from primary');
} else {
throw new Error(`wrong TCP message received: ${data}`);
}
});
// When the connection ends kill worker and shutdown process
client.on('end', function() {
worker.kill();
});
worker.on('exit', common.mustCall(function() {
process.exit(0);
}));
});
process.once('exit', function() {
forEach(checks, function(check, type) {
assert.ok(check.receive, `The ${type} did not receive any message`);
assert.ok(check.correct, `The ${type} did not get the correct message`);
});
});
}
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