cloudcms-server/launchpad/launchers/redis.js

Cloud CMS Application Server Module

const { Server } = require("socket.io");
const { setupWorker } = require("@socket.io/sticky");
const { createAdapter } = require("@socket.io/redis-adapter");
const redisHelper = require("../../util/redis");
const IORedis = require("ioredis");

const clusterLauncherFactory = require("./cluster");

module.exports = function(config) {
    
    var clusterLauncher = clusterLauncherFactory(config);
    
    var r = {};
    
    r.startCluster = function(httpServer, callback)
    {
        clusterLauncher.startCluster(httpServer, callback);
    };
    
    r.afterStartCluster = function(httpServer, callback)
    {
        clusterLauncher.afterStartCluster(httpServer, callback);
    };
    
    r.afterStartServer = function(app, httpServer, callback)
    {
        var redisOptions = redisHelper.redisOptions({}, "CLOUDCMS_CLUSTER");
        var pubClient = new IORedis(redisOptions.url);
        var subClient = pubClient.duplicate();

        const io = new Server(httpServer);
        httpServer.io = io;

        io.engine.on("connection_error", function(err) {
            // console.log("CONNECTION ERROR");
            // console.log("REQUEST: ", err.req);      // the request object
            // console.log("CODE: " + err.code);     // the error code, for example 1
            // console.log("MESSAGE: ", err.message);  // the error message, for example "Session ID unknown"
            // console.log("CONTEXT: ", err.context);  // some additional error context
        });

        // use the redis adapter
        io.adapter(createAdapter(pubClient, subClient, {
            //publishOnSpecificResponseChannel: true
        }));

        // setup connection with the primary process
        setupWorker(io);

        // on connect
        io.on("connection", (socket) => {
            //console.log("Redis Launcher on('connection') - socket id:" + socket.id);
            socket.on('message', function(m) {
                console.log("Socket Connection message: " + m);
            });

            // always catch err
            socket.on("error", function(err) {
                console.log("Caught socket error");
                console.log(err.stack);
            });

            // TODO
        });

        return callback();
    };
    
    return r;
}