我正在尝试在我的 Express 应用程序中使用集群模块。我使用 express-generator 创建我的应用程序结构,但我不确定如何在保持 app.js 和 bin/www 分离的同时合并集群模块。我已经看过使用 express 的集群的教程和 github 示例,但在完整的应用程序框架中没有。有没有办法在合并集群模块的同时保持 app.js 和 www 的分离?
这是我的完整 bin/www 文件:
#!/usr/bin/env node
/**
* Module dependencies.
*/
var app = require('../app');
var debug = require('debug')('football:server');
var http = require('http');
var cluster = require('cluster');
var numCPUs = require('os').cpus().length;
/**
* Get port from environment and store in Express.
*/
var port = normalizePort(process.env.PORT || '3000');
app.set('port', port);
if(cluster.isMaster){
// Fork workers.
for (var i = 0; i < numCPUs; i++) {
console.log('forking process', i)
cluster.fork();
}
// If a worker dies, log it to the console and start another worker.
cluster.on('exit', function(worker, code, signal) {
console.log('Worker ' + worker.process.pid + ' died.');
cluster.fork();
});
// Log when a worker starts listening
cluster.on('listening', function(worker, address) {
console.log('Worker started with PID ' + worker.process.pid + '.');
});
}
else{
/**
* Create HTTP server.
*/
console.log('i am in the else statement')
var server = http.createServer(app);
console.log('created another server')
/**
* Listen on provided port, on all network interfaces.
*/
server.listen(port);
server.on('error', onError);
server.on('listening', onListening);
}
/**
* Normalize a port into a number, string, or false.
*/
function normalizePort(val) {
var port = parseInt(val, 10);
if (isNaN(port)) {
// named pipe
return val;
}
if (port >= 0) {
// port number
return port;
}
return false;
}
/**
* Event listener for HTTP server "error" event.
*/
function onError(error) {
if (error.syscall !== 'listen') {
throw error;
}
var bind = typeof port === 'string'
? 'Pipe ' + port
: 'Port ' + port;
// handle specific listen errors with friendly messages
switch (error.code) {
case 'EACCES':
console.error(bind + ' requires elevated privileges');
process.exit(1);
break;
case 'EADDRINUSE':
console.error(bind + ' is already in use');
process.exit(1);
break;
default:
throw error;
}
}
/**
* Event listener for HTTP server "listening" event.
*/
function onListening() {
var addr = server.address();
var bind = typeof addr === 'string'
? 'pipe ' + addr
: 'port ' + addr.port;
debug('Listening on ' + bind);
console.log('yay')
}
我从来没有收到说“Worker 正在用 pid 监听...”的消息,并且 else 语句顶部的 console.log() 永远不会被打印出来。