This document introduces Node.js and provides an overview of its key features and use cases. Some main points:
- Node.js is a JavaScript runtime built on Chrome's V8 engine that allows building scalable network applications easily. It is not a web framework but you can build web frameworks with Node.js modules.
- Node.js is well-suited for building web servers, TCP servers, command line tools, and anything involving high I/O due to its non-blocking I/O model. It has over 15,000 modules and an active community for support.
- Common use cases include building JSON APIs, single page apps, leveraging existing Unix tools via child processes, streaming
Rising from non-existence a few short years ago, Node.js is already attracting the accolades and disdain enjoyed and endured by the Ruby and Rails community just a short time ago. It overtook Rails as the most popular Github repository in 2011 and was selected by InfoWorld for the Technology of the Year Award in 2012. This presentation explains the basic theory and programming model central to Node's approach and will help you understand the resulting benefits and challenges it presents. You can also watch this presentation at http://bit.ly/1362UGA
Slides from my talk "Node.js Patterns for Discerning Developers" given at Pittsburgh TechFest 2013. This talk detailed common design pattern for Node.js, as well as common anti-patterns to avoid.
Get on board the NodeJS Express as we take a journey through what makes NodeJS special. Server-side JavaScript that has an event loop for a heart, we'll delve into its single threaded nature and the advantages provided. From there we'll pass through the land of the Node Package Management tool, how to set up your own package and bring in useful 3rd party packages as dependencies. Our final destination is ExpressJS, a Sinatra inspired framework for NodeJS.
Nodejs Event Driven Concurrency for Web ApplicationsGanesh Iyer
We describe the event-driven concurrency model used by Nodejs, a JavaScript server-side scripting platform. An overview of the traditional thread based approach(used by Apache) is also given. We compare both the approaches. An Introduction to Nodejs programming is provided and some useful packages are discussed.
Rising from non-existence a few short years ago, Node.js is already attracting the accolades and disdain enjoyed and endured by the Ruby and Rails community just a short time ago. It overtook Rails as the most popular Github repository in 2011 and was selected by InfoWorld for the Technology of the Year Award in 2012. This presentation explains the basic theory and programming model central to Node's approach and will help you understand the resulting benefits and challenges it presents. You can also watch this presentation at http://bit.ly/1362UGA
Slides from my talk "Node.js Patterns for Discerning Developers" given at Pittsburgh TechFest 2013. This talk detailed common design pattern for Node.js, as well as common anti-patterns to avoid.
Get on board the NodeJS Express as we take a journey through what makes NodeJS special. Server-side JavaScript that has an event loop for a heart, we'll delve into its single threaded nature and the advantages provided. From there we'll pass through the land of the Node Package Management tool, how to set up your own package and bring in useful 3rd party packages as dependencies. Our final destination is ExpressJS, a Sinatra inspired framework for NodeJS.
Nodejs Event Driven Concurrency for Web ApplicationsGanesh Iyer
We describe the event-driven concurrency model used by Nodejs, a JavaScript server-side scripting platform. An overview of the traditional thread based approach(used by Apache) is also given. We compare both the approaches. An Introduction to Nodejs programming is provided and some useful packages are discussed.
We are a passionate group of youngsters with the aim to deliver secure and creative solutions for currently prevailing obstacles and to avert future ones. Our solutions make sure your resources are efficiently worn and efforts are simple. We are start-ups confined to no boundaries. Hit us with your problems and we will bounce back with solutions. We welcome error pointed and feedback to serve you better. Our support team is available 24X7 to put a smile on you and keep your clients happy.
EVRYTHNG: Concepts, technologies and applications for connecting physical obj...EVRYTHNG
Check out the presentation from Co-Founder Dominique Guinard and Research Developer Iker Larizgoitia Abad, from the 14th International Conference on Web Engineering ICWE 2014.
Introduction to node js - From "hello world" to deploying on azureColin Mackay
Slide deck from my talk on Node.js.
More information is available here: http://colinmackay.scot/2014/11/29/dunddd-2014-introduction-to-node-jsfrom-hello-world-to-deploying-on-azure/
Node js is said to be an open source. It is the cross-platform JavaScript runtime to developing different types of applications and tools. Thus the best node js course js is not a JavaScript framework with its many of the core modules which are mainly written in the JavaScript and even the developers to writing a new module. It is also primarily used to develop the input and output web applications like single page applications, video streaming sites with other web applications.
This is a presentation I prepared for a local meetup. The audience is a mix of web designers and developers who have a wide range of development experience.
Save 10% off ANY FITC event with discount code 'slideshare'
See our upcoming events at www.fitc.ca
Node.js: The What, The How and The When
with Richard Nieuwenhuis
Mathilde Lemée & Romain Maton
La théorie, c’est bien, la pratique … aussi !
Venez nous rejoindre pour découvrir les profondeurs de Node.js !
Nous nous servirons d’un exemple pratique pour vous permettre d’avoir une premiere experience complete autour de Node.js et de vous permettre de vous forger un avis sur ce serveur Javascript qui fait parler de lui !
http://soft-shake.ch/2011/conference/sessions/incubator/2011/09/01/hands-on-nodejs.html
Scalable server component using NodeJS & ExpressJSAndhy Koesnandar
Talk that Andhy Koesnandar and Oby Sumampouw gave at Jakarta JS 12-15-2014
Title: Scalable server component using NodeJS & ExpressJS
Description: Today is a wonderful time to be a JS developer. JS is the lingua franca in the web browser, apps and now server. I am going to talk about How JS developers can build server scalable component using NodeJS + ExpressJS .
About Cermati:
Cermati is a financial comparison site in Indonesia. We compare credit cards and promotions
OpenSource API Server based on Node.js API framework built on supported Node.js platform with Tooling and DevOps. Use cases are Omni-channel API Server, Mobile Backend as a Service (mBaaS) or Next Generation Enterprise Service Bus. Key functionality include built in enterprise connectors, ORM, Offline Sync, Mobile and JS SDKs, Isomorphic JavaScript and Graphical API creation tool.
Has the traditional intro to event looped servers (thanks Ryan!) with a couple of examples of why I think node.js is particularly exciting today. Code for the demos can be found at https://github.com/davidpadbury/node-intro.
Its a presentation about node.js. Here I have covered the basic things of node.js. Like what is node.js how it can be used. and explanation about some node.js frameworks
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
2. Node’s Goal is to provide an
easy way to build scalable
network programs.
3. Node.js is NOT another
web framework!
But you can create a web framework using NPM modules.
4. Node.js is…
Web Server
TCP Server
Awesome Robot Controller
Command Line Application
Proxy Server
Streaming Server
VoiceMail Server
Music Machine
Anything that has to deal with high I/O
7. Why Node.js?
• Non Blocking I/O
• Based on Chrome’s V8 Engines (FAST!)
• 15,000+ Modules
• Active Community (IRC, Mailing Lists, Twitter,
Github)
• Mac, Linux and Windows (all first class citizens)
• One Language for Frontend and Backend
• JavaScript is the Language of the Web
8. Node.js Good Use Cases
• JSON APIs
Building light-weight REST / JSON api's is something where node.js
really shines. Its non-blocking I/O model combined with JavaScript
make it a great choice for wrapping other data sources such as
databases or web services and exposing them via a JSON interface.
• Single Page Apps
If you are planning to write an AJAX heavy single page app (think
gmail), node.js is a great fit as well. The ability to process many
requests / seconds with low response times, as well as sharing things
like validation code between the client and server make it a great
choice for modern web applications that do lots of processing on the
client.
9. Node.js Good Use Cases
• Shelling out to Unix Tools
With node.js still being young, it's tempting to re-invent all kinds of
software for it. However, an even better approach is tapping into the
vast universe of existing command line tools. Node's ability to spawn
thousands of child processes and treating their outputs as a stream
makes it an ideal choice for those seeking to leverage existing
software.
• Streaming Data
Traditional web stacks often treat http requests and responses as
atomic events. However, the truth is that they are streams, and many
cool node.js applications can be built to take advantage of this fact.
One great example is parsing file uploads in real time, as well as
building proxies between different data layers.
10. Node.js Good Use Cases
• Soft Real Time Applications
Another great aspect of node.js is the ease at which you can develop
soft real time systems. By that I mean stuff like twitter, chat software,
sport bets or interfaces to instant messaging networks.
11. Basic HTTP Server
var http = require('http');
var server = http.createServer(function (req, res) {
res.writeHead(200);
res.end('Hello World');
});
server.listen(4000);
12. Some people use the
core http module to
build their web apps,
most use a framework
like Express
or Connect or Flatiron or Tako or Derby or Geddy or Mojito or …
15. Blocking I/
270ms = SUM(user, activities, leaderboard)
// Get User – 20ms
$query = 'SELECT * FROM users WHERE id = ?';
$users = query($query, array($id));
print_r($users);
// Get Activities – 100ms
$query = 'SELECT * FROM activities ORDER BY timestamp LIMIT 50';
$activities = query($query);
print_r($activities);
// Get Leader Board – 150ms
$query = 'SELECT count(points) as total, user_id FROM activities LIMIT 50';
$leader_board = query($query);
16. Non-Blocking I/
150ms = MAX(user, activities, leaderboard)
// Get User – 20ms
var query = 'SELECT * FROM users WHERE id = ?';
db.query(query, [userId], function (err, results) {
console.log(results);
});
// Get Activities – 100ms
var query = 'SELECT * FROM activities ORDER BY timestamp LIMIT 50';
db.query(query, function (err, results) {
console.log(results);
});
// Get Leader Board – 150ms
var query = 'SELECT count(points) as total, user_id FROM activities LIMIT 50';
db.query(query, function (err, results) {
console.log(results);
});
17. The most jarring thing
about Server Side JavaScript
is thinking in callbacks
18. The Node Callback Pattern
awesomeFunction(arg, function (err, data) {
if (err) {
// Handle Error
}
// Do something awesome with results.
});
• Error first then success… ALWAYS!
• Because this is the de-facto standard 99.99999% of the time
you will be able to guess how a Node library will work.
19. Callbacks are the Devil’s Work!
Don’t go down this rabbit hole…
One of the biggest mistakes is to get yourself in
to callback hell by nesting callbacks inside of
callbacks inside of more callbacks.
var userQuery = 'SELECT * FROM users WHERE id = ?';
var activityQuery = 'SELECT * FROM activities ORDER BY timestamp LIMIT 50';
var leaderBoardQuery = 'SELECT count(points) as total, user_id FROM activities LIMIT 50';
db.query(userQuery, [id], function (userErr, userResults) {
db.query(activityQuery, function (activityErr, activityResults) {
db.query(leaderBoardQuery, function (leaderBoardErr, leaderBoardResults) {
// Do something here
});
});
});
20. Avoiding Callback Hell
• Keep your code shallow
• Break up your code into small chunks
• Use a sequential library like async
• Visit http://callbackhell.com
21. Async to the rescue!
var async = require('async');
var db = require(’db');
function getUser (callback) {
var query = 'SELECT * FROM users WHERE id = ?';
db.query(query, [userId], callback);
}
function getActivities (callback) {
var query = 'SELECT * FROM activities ORDER BY timestamp LIMIT 50';
db.query(query, callback);
}
function getLeaderBoard (callback) {
var query = 'SELECT count(points) as total, user_id FROM activities LIMIT 50';
db.query(query, callback);
}
var tasks = [getUser, getActivities, getLeaderBoard];
async.parallel(tasks, function (err, results) {
var user = results[0];
var activities = results[1];
var leaderBoard = results[2];
});
22. Visit
https://github.com/caolan/async
for a detailed guide on using the async module.
Async provides several useful
patterns for asynchronous control
flow including: parallel, series,
waterfall, auto and queue.
23. The Node Package Manager
otherwise know as… NPM
It’s how you harness the
awesomeness of the
Node.js community!
24. Using NPM
It’s standard practice to install modules locally for your current project.
Modules are installed in the ./node_modules in the current directory.
To Install a new module
npm install <module>
To find a module in the NPM repository
npm search <search string>
To list the modules (and their dependencies) in the current project
npm list
To see module details
npm info <module>
35. mongoDB Overview
• Document Database
– Documents (objects) map nicely to programming language data types.
– Embedded documents and arrays reduce need for joins.
– Dynamic schema
• High Performance
– Embedding makes reads and writes fast.
– Indexes can include keys from embedded documents and arrays.
– Optional streaming writes (no acknowledgments).
• High Availability
– Replicated servers with automatic master failover.
36. mongoDB Overview
• Easy Scalability
– Automatic sharding distributes collection data across machines.
37. mongoDB Data Model
• MongoDB instance hosts a number of databases.
• A database holds a set of collections.
• A collection holds a set of documents.
• A document is a set of key-value pairs.
• Documents have dynamic schema.
38. Document Structure
• Data is stored in the form of JSON data.(Which
internally stored as BSON)
{
"_id" : ObjectId("4ccbfc75bd163019417c27f8"),
"title": “Hello World! ",
"author": {
"firstname": "Joe",
"lastname": "Bloggs"
},
"tags": ["test", "foo", "bar"]
}