first commit

.gitignore

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+node_modules/**

example.1.js

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+/*jshint node: true, -W032 */
+'use strict';
+
+function sleep(time) {
+    var stop = new Date().getTime();
+    while(new Date().getTime() < stop + time) {
+        ;
+    }
+};
+
+var longJob = function(time, id) {
+    console.log('Start:   ' + id);
+    sleep(time);
+    var result = 'Done:    ' + id;
+    return result;
+};
+
+
+console.log('--A--');
+
+var anotherResult = longJob(2000, 'TWO');
+console.log(anotherResult);
+
+console.log('--B--');
+
+var myResult = longJob(1000, 'ONE');
+console.log(myResult);
+
+console.log('--C--');

example.2.js

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+/*jshint node: true, -W032 */
+'use strict';
+
+
+function sleep(time) {
+    var stop = new Date().getTime();
+    while(new Date().getTime() < stop + time) {
+        ;
+    }
+}
+
+
+var longJob = function(time, id, callback) {
+    console.log('Start:   ' + id);
+
+    process.nextTick(function() {
+        sleep(time);
+        var result = 'Done:    ' + id;
+        callback(null, result);
+    });
+
+};
+
+console.log('--A--');
+
+longJob(2000, 'TWO', function(err, anotherResult){
+    console.log(anotherResult);
+});
+
+console.log('--B--');
+
+longJob(1000, 'ONE', function(err, myResult){
+    console.log(myResult);
+});
+
+console.log('--C--');
+

example.3.js

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+/*jshint node: true, -W032 */
+'use strict';
+
+
+var longJob = function(time, id, callback) {
+    console.log('Start:   ' + id);
+
+    setTimeout(function() {
+        var result = 'Done:    ' + id;
+        callback(null, result);
+      }, time);
+
+};
+
+console.log('--A--');
+
+longJob(2000, 'TWO', function(err, anotherResult){
+    console.log(anotherResult);
+});
+
+console.log('--B--');
+
+longJob(1000, 'ONE', function(err, myResult){
+    console.log(myResult);
+});
+
+console.log('--C--');
+

example.4.js

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+/*jshint node: true, -W032 */
+'use strict';
+
+
+var longJob = function(time, id, callback) {
+    console.log('Start:   ' + id);
+
+    setTimeout(function() {
+        var result = 'Done:    ' + id;
+        callback(null, result);
+      }, time);
+
+};
+
+console.log('--A--');
+
+longJob(1000, 'ONE', function(err, myResult){
+    console.log(myResult);
+
+    longJob(2000, 'TWO', function(err, anotherResult){
+        console.log(anotherResult);
+    });
+
+});
+
+
+console.log('--B--');
+
+longJob(2000, 'TWO', function(err, myResult){
+    console.log(myResult);
+
+    longJob(1000, 'ONE', function(err, anotherResult){
+        console.log(anotherResult);
+    });
+
+});
+
+
+
+console.log('--C--');

example.5.js

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+/*jshint node: true, -W032, newcap:false */
+'use strict';
+
+var Promise = require('bluebird');
+
+var longJob = function(time, id, callback) {
+    console.log('Start:   ' + id);
+
+    setTimeout(function() {
+        var result = 'Done:    ' + id;
+        callback(null, result);
+      }, time);
+
+};
+
+var longJobP = function (time, id) {
+    var deferred = Promise.pending();
+    longJob(time, id, function(err ,result){
+        deferred.resolve(result);
+    });
+    return deferred.promise;
+};
+
+console.log('--A--');
+
+
+Promise.resolve('')
+
+.then(function(myResult){
+    console.log(myResult);
+    return longJobP(1000, 'ONE');
+})
+
+.then(function(myResult){
+    console.log(myResult);
+    return longJobP(2000, 'TWO');
+})
+
+
+.then(function(myResult){
+    console.log(myResult);
+
+})
+
+.catch(function(err){
+    console.log(err);
+
+});
+
+console.log('--B--');

example.6.js

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+/*jshint node: true, -W032, newcap:false */
+'use strict';
+
+var Promise = require('bluebird');
+var express = require('express');
+var app = express();
+
+var longJob = function(time, id, callback) {
+    console.log('Start:   ' + id);
+
+    setTimeout(function() {
+        var result = 'Done:    ' + id;
+        callback(null, result);
+      }, time);
+
+};
+
+var longJobP = function (time, id) {
+    var deferred = Promise.pending();
+    longJob(time, id, function(err ,result){
+        deferred.resolve(result);
+    });
+    return deferred.promise;
+};
+
+
+// http://127.0.0.1:3000/
+app.get('/', function (req, res) {
+	console.log('Hello World');
+	return res.status(200).json({ data: 'Hello World' });
+});
+
+// http://127.0.0.1:3000/long/10000/ten
+// http://127.0.0.1:3000/long/5000/five
+app.get('/long/:ms/:id', function (req, res) {
+	var ms = parseInt(req.params.ms);
+	var id = req.params.id;
+
+	return longJobP(ms, id)
+	.then(function(myResult){
+		console.log(myResult);
+
+		var data = {
+			myResult : myResult,
+			ms       : ms,
+			id       : id
+		}
+		return res.status(200).json(data);
+	})
+	.catch(function(err){
+		return res.status(500).json({error: err});
+	});
+
+});
+
+
+var server = app.listen(3000, function () {
+	var port = server.address().port;
+	console.log('Example app listening at http://127.0.0.1:%s', port);
+});
+

package.json

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+{
+  "name": "swe.nodejs.examples",
+  "version": "2015.0.0",
+  "description": "Nodejs examples: callbacks and promises",
+  "dependencies": {
+    "bluebird": "3.4.6",
+    "express": "4.14.0"
+  },
+  "devDependencies": {},
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/alemhnan/SWE.UNIPD.git"
+  },
+  "author": "Alessandro Maccagnan <alessandro.maccagnan@gmail.com> (http://www.redbabel.com)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/alemhnan/SWE.UNIPD/issues"
+  },
+  "homepage": "https://github.com/alemhnan/SWE.UNIPD#readme"
+}