forked from nodejs/node-v0.x-archive
/
worker.js
145 lines (114 loc) · 3.57 KB
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worker.js
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var sys = require('sys');
var workerIndex = 0;
var MESSAGE_SPLITTER = "\nWEBWORKERMESSAGEMIME\n"
var WORKER_PARAS = ["-mode", "worker"]
var workerImplementation = WorkerChild;
var workerProcessImplementation = WorkerProcess;
exports.importScripts = function () {
for(var i = 0, len = arguments.length; i < len; ++i) {
require(arguments[i]);
}
}
var Worker = function (filename) {
var self = this;
process.EventEmitter.call(this);
this.addListener("message", function (message) {
if(self.onmessage) {
self.onmessage(message)
}
});
this.impl = new workerImplementation(this, filename);
}
sys.inherits(Worker, process.EventEmitter);
Worker.prototype.postMessage = function (payload) {
var message = JSON.stringify(payload);
this.impl.postMessage(message)
}
Worker.prototype.terminate = function () {
this.impl.terminate();
}
exports.Worker = Worker;
function WorkerChild (eventDest, filename) {
var self = this;
this.eventDest = eventDest;
this.filename = filename;
this.child = process.createChildProcess("node", [this.filename].concat(WORKER_PARAS));
this.child.addListener("output", function (data) {
self.handleData(data)
});
this.child.addListener("error", function (data) {
sys.error(data || "")
})
this.child.addListener("exit", function (code) {
//sys.error("Child exit with "+code)
})
this.buffer = "";
}
WorkerChild.prototype = {
postMessage: function (message) {
this.child.write(message+MESSAGE_SPLITTER, "utf8");
},
handleData: function (data) {
this.buffer += data;
//sys.error("Received data "+this.buffer)
var parts = this.buffer.split(MESSAGE_SPLITTER);
if(parts.length > 1) {
var message = parts.shift();
this.handleMessage(message);
this.buffer = parts.join(MESSAGE_SPLITTER);
this.handleData("");
}
},
handleMessage: function (message) {
//sys.error("Emit event "+message)
this.eventDest.emit("message", JSON.parse(message))
},
terminate: function () {
this.child.kill();
}
}
var workerProcess;
function WorkerProcess(eventDest) {
var self = this;
this.eventDest = eventDest;
process.stdio.open()
process.stdio.addListener("data", function (data) {
//sys.error("Child receved data");
self.handleData(data)
});
this.buffer = "";
}
WorkerProcess.prototype = {
postMessage: function (message) {
sys.print(message+MESSAGE_SPLITTER);
},
handleData: WorkerChild.prototype.handleData,
handleMessage: WorkerChild.prototype.handleMessage
}
function WorkerNode () {
var self = this;
this.impl = new workerProcessImplementation(this);
process.EventEmitter.call(this);
this.addListener("message", function (message) {
//sys.error("Received message "+message)
if(self.onmessage) {
self.onmessage(message)
}
});
}
sys.inherits(WorkerNode, process.EventEmitter);
WorkerNode.prototype.postMessage = function (payload) {
this.impl.postMessage(JSON.stringify(payload));
};
(function () {
if(len = process.ARGV.length < 4) return;
for(var i = 2, len = process.ARGV.length; i < len; ++i) {
var arg = process.ARGV[i];
if(arg != WORKER_PARAS[i-2]) {
sys.error("Fail")
return;
}
}
exports.worker = new WorkerNode();
setInterval(function () {}, 10000)
})();