What’s the MEAN Stack?
MEAN is an acronym made up of commonly used technologies for an all JavaScript web stack. You don’t have to use this combination and there are many alternative choices, especially on the client-side such as Backbone, Ember etc.
This particular combination of tools has generated a lot of traction in the enterprise area and is framework based, making it a good place to start.
The key components are:
- MongoDB (Database)
- ExpressJS (Web Framework)
- AngularJS (Front-end Framework)
- NodeJS (Application Server)
Before you begin we recommend you read about the basic building blocks that assemble a MEAN application:
- MongoDB - Go through MongoDB Official Website and proceed to their Official Manual, which should help you understand NoSQL and MongoDB better.
- Express - The best way to understand express is through its Official Website, which has a Getting Started guide, as well as an ExpressJS guide for general express topics. You can also go through this StackOverflow Thread for more resources.
- AngularJS - Angular's Official Website is a great starting point. You can also use Thinkster Popular Guide, and Egghead Videos.
- Node.js - Start by going through Node.js Official Website and this StackOverflow Thread, which should get you going with the Node.js platform in no time.
All Server side code write in expressJS ex:-
// Updated By : Om Prakash
// Updated on : 14 March 2016
//Purpose : (1.0) Insert and Get Repository in Mongo DataBase.
var express = require('express');
var fs = require('fs');
var mongoClient = require('./Mongo.js'); // For Modularity
var mkdirp = require('mkdirp');
var app = express();
app.use(express.static('public'));
app.use(express.static('WebContent'));
var appConfig = require('./AppConfig');
//Get Repository fields 1.0
app.get('/repository/getFields', function (req, res) {
console.log("My Request This", req.query);
mongoClient.getRepositoryFields(req.query.repositoryName, function (err, result) {
if (err) {
res.status(500).send("Oops! Error while get Source configuration. Please contact your administrator.")
return;
}
console.log("Result This", result);
res.send({ err: null, data: result});
});
});
//Get Repository Data 1.2
app.get('/repository/getRepositoryData', function (req, res) {
console.log("My Request This", req.query);
mongoClient.getRepositoryData(req.query.repositoryName, function (err, result) {
if (err) {
res.status(500).send("Oops! Error while get Source configuration. Please contact your administrator.")
return;
}
console.log("Result This", result);
res.send({ err: null, data: result });
});
});
//get Repository data 1.0
app.get('/repository/repositoryList', function (req, res) {
console.log('going to get recon results');
mongoClient.getRepository({}, function (err, result) {
console.log("req This", req.params);
if (err) {
res.status(500).send("Oops! Error while get Source configuration. Please contact your administrator.")
return;
}
res.send({ err: null, data: result });
});
});
//save Repository 1.0
app.post('/repository', LoaderInput.any(), function (req, res) {
mongoClient.saveRepository(req.body, function (err, result) {
if (err) {
//res.status(500).send("Oops! Error while Save repository. Please contact your administrator.")
res.status(500).send(err);
return;
}
res.send({ err: err, data: result });
});
});
var port = appConfig.getConfig("ServerPort");
app.listen(port, function () {
console.log("server started on port : " + port);
});
//Mongo.js for mongo client
// Created By : Om Prakash
// Created on : 14 March 2016
//Purpose : (1.0) Create for Mongo DataBase Operation.
var appConfig = require('./AppConfig'); // For Modularity
var mongoClient = require('mongodb').MongoClient;
var assert = require('assert')
var ObjectId = require('mongodb').ObjectID;
var mongoURL = 'mongodb://' + appConfig.getConfig("mongoServerIP") + ':' + appConfig.getConfig("mongoServerPort") + '/' + appConfig.getConfig("mongoDBName");
// Insert collection
var insertCollection = function (TableName, doc, callback) {
mongoClient.connect(mongoURL, function (err, mongodb) {
//assert.equal(err, null);
if(err){
console.log("unable to connect to db:", mongoURL);
console.log(err);
callback(err.message,null);
return;
}
//console.log("connected to db:", mongoURL);
mongodb.collection(TableName).insert(doc, function(err, result){
if(err){
console.log(err);
callback(err.message,null);
return;
}
callback(err, result);
mongodb.close();
});
});
};
// Table Exists
var getTableExists = function (TableName, doc, callback) {
//console.log("Collection exists!", TableName);
mongoClient.connect(mongoURL, function (err, mongodb) {
//assert.equal(err, null);
if(err){
console.log("unable to connect to db:", mongoURL);
console.log(err);
callback(err.message,null);
return;
}
mongodb.collection("system.namespaces").find({ name: appConfig.getConfig("mongoDBName") + "." + TableName }).toArray(function (err, result) {
//console.log("Collection doesn't e", result);
if (result.length) {
err = "Collection alredy exists!";
console.log(err);
callback(err.message, result);
return;
}
callback(err, result);
mongodb.close();
});
});
};
// Get Table collection
var getCollection = function (TableName, doc, callback) {
mongoClient.connect(mongoURL, function (err, mongodb) {
//assert.equal(err, null);
if(err){
console.log("unable to connect to db:", mongoURL);
console.log(err);
callback(err.message,null);
return;
}
mongodb.collection(TableName).find(doc).toArray(function(err, result){
if(err){
callback(err.message,null);
return;
}
callback(err, result);
mongodb.close();
});
});
};
var removeCollection = function (TableName, doc, callback) {
mongoClient.connect(mongoURL, function (err, mongodb) {
//assert.equal(err, null);
if(err){
console.log("unable to connect to db:", mongoURL);
console.log(err);
callback(err.message,null);
return;
}
mongodb.collection(TableName).remove(doc)(function(err, result){
if(err){
callback(err.message,null);
return;
}
callback(err, result);
mongodb.close();
});
});
};
// Get Table collection with selected fields and where
var getCollectionFields = function (TableName, doc, fields, callback) {
console.log(TableName, doc, fields);
mongoClient.connect(mongoURL, function (err, mongodb) {
//assert.equal(err, null);
if(err){
console.log("unable to connect to db:", mongoURL);
console.log(err);
callback(err.message,null);
return;
}
mongodb.collection(TableName).find(doc, fields).toArray(function(err, result){
//console.log('result',result);
if(err){
callback(err.message,null);
return;
}
callback(err, result);
mongodb.close();
});
});
};
// Get Table collection top n
var getTop = function (TableName,objSort,limit, doc, callback) {
mongoClient.connect(mongoURL, function (err, mongodb) {
//assert.equal(err, null);
if(err){
console.log("unable to connect to db:", mongoURL);
console.log(err);
callback(err.message,null);
return;
}
mongodb.collection(TableName).find(doc.where, doc.fields).sort(objSort).limit(limit).toArray(function(err, result){
if(err){
callback(err.message,null);
return;
}
callback(err, result);
mongodb.close();
});
});
};
// save Repository in table
var saveRepository = function (repository, callback) {
//console.log("repository", repository);
repositoryMaster = {
name: repository.name,
fields: repository.fields,
collectionName : "Repository_" + repository.name
}
//console.log(repositoryMaster);
getCollection("Repository", {name: repository.name}, function (err, result) {
if (err) {
console.log("Repository get:", err);
callback(err, null);
return;
}
if(result.length > 0){
err="Entity already exists. Please try another name";
console.log(err + ":" + repository.name);
callback(err, null);
return;
}
insertCollection("Repository", repositoryMaster, function (err, result) {
if (err) {
console.log("insert error:", err);
callback(err, null);
return;
}
//console.log(" Repository.data", Repository.data);
insertCollection(repositoryMaster.collectionName, repository.data, function (err, result) {
if (err) {
console.log("insert error:", err);
callback(err, null);
removeCollection("Repository", repositoryMaster,function(err,result){
console.log("remove err, result:",err,result);
})
return;
}
callback(null, "Repository Saved Successfully");
});
});
});
};
module.exports.saveRepository = saveRepository;
// get Repository List
var getRepository = function (config, callback) {
getCollectionFields("Repository", {}, { name: 1, _id: 0 }, function (err, result) {
if (err) {
console.log("getRepository:", err);
callback(err, null);
return;
}
callback(null, result);
});
};
module.exports.getRepository = getRepository;
// get Repository Data keys
var getRepositoryFields = function (repositoryName, callback) {
//TODO: { fields: 1, _id: 0 } is giving parsing error to be debugged
getCollectionFields("Repository", {name: repositoryName}, { _id: 0 }, function (err, result) {
if (err) {
console.log("getRepositoryFields:", err);
callback(err, null);
return;
}
else if(result.length == 0){
err= "Invalid repository name :" + repositoryName;
callback(err, result);
return;
}
//console.log('result',result);
callback(null, result[0].fields);
});
};
module.exports.getRepositoryFields = getRepositoryFields;
// get Source Config
var getSourceConfig = function (config, callback) {
getCollection("SourceMaster", config, function (err, result) {
if (err) {
console.log("getSourceConfig:", err);
callback(err, null);
return;
}
callback(null, result);
});
};
module.exports.getSourceConfig = getSourceConfig;
var getRepositoryData = function (repositoryName, callback) {
getCollectionFields("Repository_"+repositoryName,{}, {_id: 0 }, function (err, result) {
if (err) {
console.log("getRepositoryData:", err);
callback(err, null);
return;
}
callback(err, result);
});
};
module.exports.getRepositoryData = getRepositoryData;
App.config.js
var config = {};
config["mongoServerIP"] = "localhost";
config["mongoServerPort"] = "27017";
config["mongoDBName"] = "DataLoader";
var getConfig = function (keyName) {
return config[keyName];
}
module.exports.getConfig = getConfig;
use in Angular Create Factory and use angular resource
//Create factory for Repository Operation 1.0
izLoader.factory('repository', function ($resource, $http, Upload) {
return $resource('/repository/:cmd', {}, {
repositoryList: { method: 'GET',isArray:false, params: { cmd: 'repositoryList' } }
});
});
call this service get method with query
repository.get({//method: "GET", isArray: false,
"cmd": 'getFields', "repositoryName": config.inputSourceProperties.ddlRepositoryName, isArray: false
}, function (result, headers) {
callback(result.err, result.data);
}, function (err) {
callback("Oops it seems some problem on the server or network connectivity", null);
});
Another method
repository.repositoryList({}, function (result, headers) {
cb(result);
}, function (err) {
console.log('error in getRepositoryList', err);
});
https://docs.angularjs.org/api/ngResource/service/$resource read this for more about resource
No comments:
Post a Comment