Book Image

Mastering Node.js

By : Sandro Pasquali
Book Image

Mastering Node.js

By: Sandro Pasquali

Overview of this book

Node.js is a modern development stack focused on providing an easy way to build scalable network software. Backed by a growing number of large companies and a rapidly increasing developer base, Node is revolutionizing the way that software is being built today. Powered by Google's V8 engine and built out of C++ modules, this is a JavaScript environment for the enterprise.Mastering Node.js will take the reader deep into this exciting development environment. Beginning with a comprehensive breakdown of its innovative non-blocking evented design, Node's structure is explained in detail, laying out how its blazingly fast I/O performance simplifies the creation of fast servers, scalable architectures, and responsive web applications.Mastering Node.js takes you through a concise yet thorough tour of Node's innovative evented non-blocking design, showing you how to build professional applications with the help of detailed examples.Learn how to integrate your applications with Facebook and Twitter, Amazon and Google, creating social apps and programs reaching thousands of collaborators on the cloud. See how the Express and Path frameworks make the creation of professional web applications painless. Set up one, two, or an entire server cluster with just a few lines of code, ready to scale as soon as you're ready to launch. Move data seamlessly between databases and file systems, between clients, and across network protocols, using a beautifully designed, consistent, and predictable set of tools.Mastering Node.js contains all of the examples and explanations you'll need to build applications in a short amount of time and at a low cost, running on a scale and speed that would have been nearly impossible just a few years ago.
Table of Contents (20 chapters)
Mastering Node.js
About the Author
About the Reviewers

Communicating with your child

All instances of the ChildProcess object extend EventEmitter, exposing events useful for managing child data connections. Additionally, ChildProcess objects expose some useful methods for interacting with children directly. Let's go through those now, beginning with attributes and methods:

  • child.connected: When a child is disconnected from its parent via child.disconnect(), this flag will be set to false.

  • child.stdin: This is a WritableStream corresponding to the child's standard in.

  • child.stdout: This is a ReadableStream corresponding to the child's standard out.

  • child.stderr: This is a ReadableStream corresponding to the child's standard error.

  • This is an integer representing the process ID (PID) assigned to the child process.

  • child.kill: This tries to terminate a child process, sending it an optional signal. If no signal is specified, the default is SIGTERM (for more about signals, see While the method...