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Introduction to Node.js
- 2. Agenda
- 3. Agenda ● What is Node.js
- 4. Agenda ● What is Node.js ● How Node.js works
- 5. Agenda ● What is Node.js ● How Node.js works ● Some Node.js examples
- 6. Agenda ● What is Node.js ● How Node.js works ● Some Node.js examples ● How to learn Node.js
- 7. Agenda ● What is Node.js ● How Node.js works ● Some Node.js examples ● How to learn Node.js ● What Node.js is good at
- 9. What is Node.js Server-side JavaScript
- 10. What is Node.js Server-side JavaScript Node.js is a platform built on Chrome's JavaScript runtime.
- 11. What is Node.js Server-side JavaScript Node.js is a platform built on Chrome's JavaScript runtime. Node.js uses an event-driven, non-blocking model to execute I/O intensive applications.
- 12. Node.js and I/O Source : https://www.altamiracorp.com/blog/employee-posts/nodejs-basics-explained 3
- 13. Node.js and I/O Source : https://www.altamiracorp.com/blog/employee-posts/nodejs-basics-explained 3 5
- 14. Node.js and I/O Source : https://www.altamiracorp.com/blog/employee-posts/nodejs-basics-explained 3 5 250
- 15. Node.js and I/O Source : https://www.altamiracorp.com/blog/employee-posts/nodejs-basics-explained 3 5 250 41,000,000
- 16. Node.js and I/O Source : https://www.altamiracorp.com/blog/employee-posts/nodejs-basics-explained 3 5 250 41,000,000 240,000,000
- 17. Node.js Event Loop Open File Connect to Socket Write to DB Event Queue
- 18. Node.js Event Loop Open File Connect to Socket Write to DB Event Queue Event Loop
- 19. Node.js Event Loop Open File Connect to Socket Write to DB Event Queue File System Network Process Other Event Loop
- 20. Node.js Event Loop Open File Connect to Socket Write to DB Event Queue File System Network Process Other Event Loop Callbacks (e.g. File Opened)
- 21. Node.js Example 1 var fs = require('fs'); 2 3 fs.readFile(filename, function(err, data) { 4 var lines = data.toString().split('n'); 5 console.log(lines.length); 6 });
- 22. Node.js Stack Node Standard Library
- 23. Node.js Stack Node Standard Library Node C++ Bindings (http, socket, filesystem)
- 24. Node.js Stack Node Standard Library V8 threadpool (libeio) event loop (libev) crypto (Open SSL) dns (c-ares) Node C++ Bindings (http, socket, filesystem)
- 25. Node.js Stack Node Standard Library Node C++ Bindings (http, socket, filesystem) V8 threadpool (libeio) event loop (libev) crypto (Open SSL) dns (c-ares)
- 26. Getting Started ● http://nodejs.org/ ● Download tar.gz ● Extract to any directory ● $ ./configure ● $ make install
- 27. Demo ● The Node.js repl ● npm and a simple webserver
- 44. What is Node.js good at?
- 45. Node.js is good at ... Node.js Webserver DB Client #1 Client #2 Client #3 Chat Server
- 46. Node.js is good at ... Node.js Webserver DB Client #1 Client #2 Client #3 Chat Server
- 47. Node.js is good at ... Node.js Webserver DB Client #1 Client #2 Client #3 Chat Server
- 48. Node.js is good at ... Node.js Server File System Producer #1 Producer #2 Producer #3 Message Queuing System Consumer #1 Consumer #2 Consumer #3
- 49. Node.js is good at ... Node.js Server File System Producer #1 Producer #2 Producer #3 Message Queuing System Consumer #1 Consumer #2 Consumer #3
- 50. Node.js is good at ... Node.js Server File System Producer #1 Producer #2 Producer #3 Message Queuing System Consumer #1 Consumer #2 Consumer #3
- 51. Node.js is good at ... Microservices
- 52. Microservices ● Small unit of functionality
- 53. Microservices ● Small unit of functionality ● About 100 lines long (can fit in your head)
- 54. Microservices ● Small unit of functionality ● About 100 lines long (can fit in your head) ● Independently deployed
- 55. Microservices ● Small unit of functionality ● About 100 lines long (can fit in your head) ● Independently deployed ● Loosely Coupled
- 56. Microservices ● Small unit of functionality ● About 100 lines long (can fit in your head) ● Independently deployed ● Loosely Coupled ● Codeable in a week
- 57. Microservices ● Small unit of functionality ● About 100 lines long (can fit in your head) ● Independently deployed ● Loosely Coupled ● Codeable in a week ● Owned by one developer
- 58. Microservice Examples ● Store json object in MongoDB
- 59. Microservice Examples ● Store json object in MongoDB ● Calculate if it is time to scale app
- 60. Microservice Examples ● Store json object in MongoDB ● Calculate if it is time to scale app ● Receive user input and forward request to another part of your app
- 61. Node.js is good at ... Microservices Web Browser HDFS HBase MySQL AuthorisationAuthentication Web Layer Component Query HBaseExpire Old Data Roll up Data
- 62. Node.js is good at ... Microservices Web Browser Authentication Authorisation Web Layer Component Query HBaseExpire Old Data Roll up Data Node.js Proxy
- 63. Node.js is good at ... Microservices Web Browser Authentication Authorisation Web Layer Component Query HBaseExpire Old Data Roll up Data Node.js Proxy
- 64. Worth watching You Only Need 100 Lines of JavaScript Pragmatic Javascript
- 65. Notable Quotables “We, among many others, find Node.js to be an order of magnitude faster than other tools for developing services.” http://www.feedhenry.com/transforming-enterprise-node-js-feedhenry/
- 66. Notable Quotables “In real web production, in real large scale systems, in real internet companies, node is outperforming the java stack in every case.” http://www.nearform.com/nodecrunch/release-the-kracken-how-paypal- is-being-revolutionized-by-node-js-and-lean-ux
- 68. More tech talks, please! ● Java 8 language features and the runtime ● Javascript technologies and language features ● Coder dojo ● Docker and LXC ● Build tools like Gradle and Grunt ● Working in real-life with Scala and Java ● Linux command line, environment tips and VI. ● The Linux OS in general (Kernal and system directories) ● Architecture “We want Volunteers, not Conscripts!”