framework/cluster.js at master · JavaScriptIOT/framework · GitHub

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// 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.

/**

* @module FrameworkCluster

* @version 2.9.2

const Cluster = require('cluster');

const CLUSTER_REQ = { TYPE: 'req' };

const CLUSTER_RES = { TYPE: 'res' };

const CLUSTER_EMIT = { TYPE: 'emit' };

const CLUSTER_MASTER = { TYPE: 'master' };

const FORKS = [];

var OPERATIONS = {};

var CALLBACKS = {};

var OPTIONS = {};

var THREADS = 0;

var MASTER = null;

exports.on = function(name, callback) {

!MASTER && (MASTER = {});

if (MASTER[name])

MASTER.push(callback);

else

MASTER[name] = [callback];

return F;

};

exports.emit = function(name, data) {

if (Cluster.isMaster) {

CLUSTER_EMIT.name = name;

CLUSTER_EMIT.data = data;

message(CLUSTER_EMIT);

} else if (F.isCluster) {

CLUSTER_EMIT.name = name;

CLUSTER_EMIT.data = data;

process.send(CLUSTER_EMIT);

}

return F;

};

exports.master = function(name, data) {

if (F.isCluster) {

CLUSTER_MASTER.name = name;

CLUSTER_MASTER.data = data;

process.send(CLUSTER_MASTER);

}

return F;

};

exports.request = function(name, data, callback, timeout) {

if (typeof(data) === 'function') {

timeout = callback;

callback = data;

data = null;

}

CLUSTER_REQ.name = name;

CLUSTER_REQ.data = data;

CLUSTER_REQ.callback = (Math.random()).toString(32).substring(3);

var obj = CALLBACKS[CLUSTER_REQ.callback] = { fn: callback, response: [], id: CLUSTER_REQ.callback };

obj.timeout = setTimeout(function(obj) {

delete CALLBACKS[obj.id];

obj.fn && obj.fn(new Error('Timeout.'), obj.response);

}, timeout || 3000, obj);

if (Cluster.isMaster)

mastersend(CLUSTER_REQ);

else

process.send(CLUSTER_REQ);

return F;

};

exports.response = function(name, callback) {

OPERATIONS[name] = callback;

return F;

};

exports.req = function(message) {

if (!F.isCluster)

return F;

// message.id

// message.name

// message.data

// message.callback

if (OPERATIONS[message.name]) {

OPERATIONS[message.name](message.data, function(response) {

CLUSTER_RES.data = response;

CLUSTER_RES.target = message.id;

CLUSTER_RES.callback = message.callback;

process.send(CLUSTER_RES);

}, message.id);

} else {

CLUSTER_RES.target = message.id;

CLUSTER_RES.data = undefined;

CLUSTER_RES.callback = message.callback;

process.send(CLUSTER_RES);

}

return F;

};

exports.res = function(message) {

var callback = CALLBACKS[message.callback];

callback.fn && callback.response.push(message.data);

var count = message.target === 'master' ? THREADS : THREADS - 1;

if (callback.response.length >= count) {

delete CALLBACKS[callback.id];

clearTimeout(callback.timeout);

callback.fn && callback.fn(null, callback.response);

}

};

exports.http = function(count, mode, options, callback) {

// Fork will obtain options automatically via event

if (Cluster.isMaster) {

CLUSTER_REQ.id = 'master';

CLUSTER_RES.id = 'master';

CLUSTER_EMIT.id = 'master';

master(count, mode, options, callback);

} else

fork();

};

exports.restart = function(index) {

if (index === undefined) {

for (var i = 0; i < THREADS; i++)

exports.restart(i);

} else {

var fork = FORKS[index];

if (fork) {

fork.removeAllListeners();

fork.disconnect();

exec(index);

}

};

function master(count, mode, options, callback) {

if (count == null || count === 'auto')

count = require('os').cpus().length;

if (typeof(options) === 'function') {

callback = options;

options = {};

} else if (!options)

options = {};

OPTIONS.count = count;

OPTIONS.mode = mode;

OPTIONS.options = options;

var Os = require('os');

require('./utils');

console.log('==================== CLUSTER =======================');

console.log('PID : ' + process.pid);

console.log('Node.js : ' + process.version);

console.log('OS : ' + Os.platform() + ' ' + Os.release());

console.log('Threads : {0}x'.format(count));

console.log('====================================================');

console.log('Date : ' + new Date().format('yyyy-MM-dd HH:mm:ss'));

console.log('Mode : ' + mode);

console.log('====================================================\n');

THREADS = count;

for (var i = 0; i < count; i++)

exec(i);

process.title = 'total: cluster';

callback && callback(FORKS);

}

function message(m) {

if (m.TYPE === 'master') {

if (MASTER && MASTER[m.name]) {

for (var i = 0, length = MASTER[m.name].length; i < length; i++)

MASTER[m.name][i](m.data);

}

} else {

if (m.target === 'master') {

exports.res(m);

} else {

for (var i = 0, length = FORKS.length; i < length; i++)

FORKS[i] && FORKS[i].send(m);

}

function mastersend(m) {

for (var i = 0, length = FORKS.length; i < length; i++)

FORKS[i] && FORKS[i].send(m);

}

function exec(index) {

var fork = Cluster.fork();

fork.$id = index.toString();

fork.on('message', message);

if (FORKS[index])

FORKS[index] = fork;

else

FORKS.push(fork);

(function(fork) {

setTimeout(function() {

OPTIONS.options.id = fork.$id;

fork.send({ TYPE: 'init', id: fork.$id, mode: OPTIONS.mode, options: OPTIONS.options, threads: OPTIONS.count, index: index });

}, fork.$id * 500);

})(fork);

}

function fork() {

require('./index');

F.on('message', on_init);

}

function on_init(msg) {

switch (msg.TYPE) {

case 'init':

CLUSTER_EMIT.id = msg.id;

CLUSTER_REQ.id = msg.id;

CLUSTER_RES.id = msg.id;

THREADS = msg.threads;

F.http(msg.mode, msg.options);

F.isCluster = true;

F.removeListener(msg.TYPE, on_init);

break;

}

framework/cluster.js at master · JavaScriptIOT/framework · GitHub

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