Server module hot update

fibjsThe http server is a memory-resident independent server program, which means that when there is a version update, the service program often needs to be restarted.

Suppose we have the following service program:

• web.jshttp handler
• app.jsApplication entrance

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// web.js
var _ver = new Date();

module.exports = function (r) {
  r.response.write("Hello, new word @ " + _ver);
}

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// app.js
var http = require("http");
var vm = require("vm");
var coroutine = require("coroutine");
var webServer = require("./web");

var svr = new http.Server(8080, webServer);

svr.start();

In app.jsdirect reference web.js, every time the application is updated, it must be restarted . Is there a way to automatically load the latest app.jswhile updating the code ?app.jsweb.js

We can use fibjs's nativeSandBoxmodule to achieve smooth hot updates. Make app.jssome changes to :

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// app.js
var http = require("http");
var vm = require("vm");
var coroutine = require("coroutine");
// var webServer = require("./web");

function new_web() {
    return new vm.SandBox({
        mq: require("mq")
    }).require("./web.js", __dirname);
}

// update svr.handler every 1 second.
coroutine.start(function() {
    while (true) {
        coroutine.sleep(1000);
        svr.handler = new_web();
    }
})

var svr = new http.Server(8080, new_web());

svr.start();

app.jsA cycle is started in , and a safe module is regenerated from the content requireevery 1s for remounting . When the content in needs to be updated, just replace the file to achieve a smooth update of the server program.web.jssvrhandlerweb.js

👉【High Performance Web Application Practice】