Daemon Index File
Introduction
The below shows the difference between the index file of a daemon written without the composer, and the index file of a daemon written with the composer.
Index.js
Daemon Index without the Composer 'use strict'; //require core framework var soajs = require('soajs'); //require daemon configuration var config = require('./config.js'); //require daemon business logic (the model is required inside the business logic) var BLModule = require("./lib/index"); //create a new daemon instance var daemon = new soajs.server.daemon(config); //initialize the daemon daemon.init(function () { //implement first JOB daemon.job("myCustomJob", function (soajs, next) { //call the initBLModel function ( read more below ) initBLModel(SOAJS, function (error, BL) { //if error is returned stop the execution and return it if(error){ return next(error); } //pass the service configuration and soajs to the business logic BL.getCart(config, soajs, function (error, response) { //formulate a standardized response and return it return next(error, response); }); }); }); //start the daemon daemon.start(); }); //function used to read the model name from the parameter provided //load it in memory and return an instance to it function initBLModel(soajs, cb) { //get the model name from the inputs arriving via the request var modelName = soajs.servicesConfig[process.env.SOAJS_ENV.toUpperCase()].model; //call BLModule.init and send the model name to load the later in memory //and return an instance for it via its callback BLModule.init(modelName, function (error, BL) { if (error) { return cb(error); } //otherwise return the business logic instance via the callback return cb(BL); }); } | Daemon Indes with the Composer "use strict"; //require the composer var composer = require("soajs.composer"); //call composer.deploy to deploy the daemon from its config file composer.deploy(__dirname + "/config.js", function(error){ //optional log message after daemon is started console.log( (error)? error : "Cart Service started ..."); }); |
As you can see above, the difference is quite significant. The composer takes away all the code you need to write in the index by parsing and rendering the information from the config.js file only.
So what should we add in the config.js so that the composer can do all this magic ? Read More