Comet with node.js and V8

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.

The document is a presentation about Node.js, a JavaScript runtime built on Chrome's V8 JavaScript engine. It discusses how Node.js uses an event-driven, non-blocking I/O model that makes it particularly suited for real-time web applications and I/O-intensive applications compared to traditional threaded server models. It provides examples of Node.js features like asynchronous I/O, event loops, modules and the npm package manager.

This document discusses creating REST APIs with Express, Node.js, and MySQL. It provides an overview of Express and its advantages. It then demonstrates how to set up a Node.js and MySQL environment, create an Express server, and implement API routes to GET, POST, DELETE, and PUT data from a MySQL database table. Code examples are provided to retrieve all todos, a single todo by ID, search todos by keyword, add a new todo, delete a todo, and update an existing todo.

This document provides an introduction to NodeJS for beginners. It discusses what NodeJS is, how it uses non-blocking I/O and event-driven architecture, and how to set up NodeJS. It also covers global objects, modules, asynchronous vs synchronous code, core NodeJS modules like filesystem and events, and how to create a basic "Hello World" NodeJS application.

This document provides an overview of building Node.js applications using the Connect and Express frameworks. It discusses getting started with Node.js and installing Connect and Express with npm. It then demonstrates building a simple "Hello World" app with the HTTP module, Connect, and Express. Key features of Connect like middleware, routing, and static file serving are covered. Express is introduced as a simpler framework built on Connect that simplifies common tasks. The document concludes with examples of routing, configuration, views, and other Express features.

The document summarizes Travis Swicegood's presentation on building servers with Node.js. It discusses how Node.js is an evented I/O toolkit that allows building scalable servers using an event loop model. It provides examples of simple socket and HTTP servers in Node.js, and how storing state and handling asynchronous operations like database queries differs in an evented model.

This 15 minute presentation discusses non-blocking I/O, event loops, and Node.js. It builds on previous work by Ryan Dahl, explaining how threads can be expensive due to context switching and memory usage, and how Node.js uses an event-driven, non-blocking model to avoid these costs. Code examples demonstrate getting and printing a policy object, handling HTTP requests asynchronously without blocking additional connections, and using callbacks to chain asynchronous actions together.

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It allows JavaScript to be used for server-side scripting and provides APIs for networking and file system operations. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, allowing a single process to handle thousands of concurrent connections. It includes a package manager and common module system. Popular frameworks like Express make it easy to build scalable web servers and applications with Node.js.

This document provides an overview of building a real-life application in Node.js. It discusses selecting a database like MongoDB, using Express for routing and templating, and Mongoose for modeling and interacting with the database. Key components covered include setting up routing, views, and static assets in Express, performing CRUD operations in MongoDB via Mongoose, and using templating engines like Jade or EJS. The overall goal is to build a basic content management system to demonstrate integrating these technologies.

The document provides an overview of middleware in Node.js and Express. It defines middleware as functions that have access to the request and response objects and can run code and make changes to these objects before the next middleware in the chain. It discusses common uses of middleware like logging, authentication, parsing request bodies. It also covers Connect middleware and how Express builds on Connect by adding features like routing and views. Key aspects covered include the middleware pipeline concept, error handling with middleware, and common middleware modules.

This document provides an overview of Node.js, including common uses, a simple "Hello World" example server, how Node.js is an event-driven platform rather than just a web server, its single-threaded asynchronous architecture based on an event loop, prerequisites for programming in Node.js like understanding callbacks and closures, its module system and use of npm, challenges of asynchronous programming, common patterns and antipatterns, and difficulties of debugging and monitoring Node.js applications.

Slides from a webinar recorded on June 11, 2015 by Jordan Kasper on Node.js architecture and Express Fundamentals

Node.js is an asynchronous and event-driven JavaScript runtime built on Google's V8 engine. It allows building scalable network applications easily and uses an event loop model with a single thread to handle non-blocking I/O. Asynchronous I/O is used to avoid blocking operations and keep the single thread available. Node.js has a large module ecosystem and is commonly used for real-time web applications and scalable backend services.

This document discusses server-side event-driven programming using Node.js. It covers how Node.js uses an event loop and asynchronous non-blocking I/O to handle many connections concurrently with high performance. Common Node.js concepts are explained like first-class functions, callbacks, and event emitters. Node.js is compared to traditional threaded programming and shown to have advantages in scalability and efficiency. Example Node.js applications and APIs are provided.

Matthew Eernisse gave a presentation on NodeJS at the Toster Conference in 2011. He introduced NodeJS as an evented I/O platform using JavaScript and V8 that is well suited for lightweight networked applications. He demonstrated a simple HTTP server in NodeJS and discussed how Yammer uses NodeJS for proxies, file uploads, testing, and real-time collaborative editing. Key aspects of NodeJS include asynchronous non-blocking I/O, event-driven programming, and its suitability for data streaming and real-time applications.

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.

JavaScript was created in 1995 and became a standard in 1997. Node.js was created in 2009 using Google's V8 JavaScript engine, allowing JavaScript to be used for server-side applications. Node.js is well-suited for building scalable web servers, APIs, and real-time applications due to its asynchronous, non-blocking architecture that uses callbacks and an event loop. Modules are used to add functionality to Node.js applications, and can be installed via the NPM package manager.

Reverse Ajax, also known as Comet, allows a server to push data to a client without the client explicitly requesting it. This is achieved through techniques like long polling where the client opens a persistent connection to the server to receive messages as they happen. Common libraries that implement Reverse Ajax include CometD, Atmosphere, and DWR, with CometD being a preferred option as it supports websockets and offers full client/server functionality.