Rethinking Enterprise Architectures with Node.js

A Node.js platform is built on top of a few principles. One of these is having a small set of functionalities, leaving the rest to the developers. This rule makes the learning curve as small as possible, and in combination with the same language reduces an amount of time spent on switching between front-end and back-end side. We glorify simplicity, we praise reusability, but the question is - how to really take advantage of them? In this talk, you'll learn why NestJS could increase your productivity and how to unlock your full potential as a JavaScript/TypeScript developer.

Transcript

1. KAMMYSLIWIEC RETHINKING ENTERPRISE ARCHITECTURES WITH NODE.JS
2. KAMMYSLIWIEC KAMIL MYŚLIWIEC SOFTWARE ENGINEER | NESTJS CREATOR
 @KAMMYSLIWIEC

3. KAMIL MYŚLIWIEC SOFTWARE ENGINEER
 @KAMMYSLIWIEC

4. KAMMYSLIWIEC NODE.JS
5. KAMMYSLIWIEC NODE.JS IS A JAVASCRIPT RUNTIME BUILT ON TOP OF GOOGLE CHROME'S V8 ENGINE
6. KAMMYSLIWIEC WHY NODE.JS?
7. KAMMYSLIWIEC LANGUAGE
8. KAMMYSLIWIEC PRODUCTIVITY
9. KAMMYSLIWIEC REUSABILITY
10. KAMMYSLIWIEC COMMUNITY
11. KAMMYSLIWIEC JAVASCRIPT JAVA PYTHON C# PHP 0% 17,5% 35% 52,5% 70%
12. KAMMYSLIWIEC SIMPLICITY
13. SIMPLICITY IS 
 PREREQUISITE FOR RELIABILITY
14. KAMMYSLIWIEC NODE.JS IS SIMPLE
15. KAMMYSLIWIEC NODE.JS IS SIMPLE?
16. KAMMYSLIWIEC SETUP TIME 1 MINUTE
17. KAMMYSLIWIEC 2 LINES 
 OF CODE
18. KAMMYSLIWIEC const app = require('express')(); app.listen(3000);
19. KAMMYSLIWIEC const app = require('express')(); app.listen(3000);
20. KAMMYSLIWIEC const app = require(‘express')(); app.get('/', (req, res) =>
 res.send('Hello world')); app.listen(3000);
21. KAMMYSLIWIEC SIMPLICITY?
22. KAMMYSLIWIEC COMPLEXITY LINES OF CODE y = x
23. KAMMYSLIWIEC COMPLEXITY LINES OF CODE y = ex
24. KAMMYSLIWIEC NODE.JS IS SIMPLE
 UP TO A CERTAIN POINT
25. KAMMYSLIWIEC Simplicity Lines of code y = ex
26. KAMMYSLIWIEC Simplicity Lines of code y = ex
27. KAMMYSLIWIEC WHY?
28. KAMMYSLIWIEC SIMPLICITY
29. KAMMYSLIWIEC PROJECTS HEAVILY VARY BY PEOPLE’S DESIGN DECISIONS
30. KAMMYSLIWIEC COMPLEXITY LINES OF CODE y = ex
31. KAMMYSLIWIEC SIMPLICITY LINES OF CODE y = 1/ex
32. KAMMYSLIWIEC SIMPLICITY LINES OF CODE y = 1/ex EXPECTED CURVE
33. RETHINK
34. KAMMYSLIWIEC SPLIT IT DOWN
35. KAMMYSLIWIEC MIDDLEWARE
36. KAMMYSLIWIEC MIDDLEWARE CLIENT REQUEST
37. KAMMYSLIWIEC MIDDLEWARE CLIENT REQUEST MIDDLEWARE MIDDLEWARE
38. KAMMYSLIWIEC TOO MANY RESPONSIBILITIES
39. KAMMYSLIWIEC ERROR HANDLING ACCESS RESTRICTION VALIDATION SIDE-EFFECTS MUTATION
40. KAMMYSLIWIEC SPLIT IT DOWN
41. KAMMYSLIWIEC ERROR HANDLING VALIDATION ASYNC
 EFFECTS ACCESS
 RESTRICTION LOGGING MUTATION
42. KAMMYSLIWIEC IT IS MISLEADING TO CALL THEM IN THE SAME WAY
43. KAMMYSLIWIEC LOOSE COUPLING
44. KAMMYSLIWIEC RELATIONS
45. KAMMYSLIWIEC A B
46. KAMMYSLIWIEC A B C
47. KAMMYSLIWIEC DECOUPLE MODULES
48. KAMMYSLIWIEC MODULE FACADE
49. KAMMYSLIWIEC ORGANISE CODE 
 PER FEATURE
50. KAMMYSLIWIEC DECOUPLE 
 TRANSFER LAYER
51. KAMMYSLIWIEC TRANSFER
 LAYER DOMAIN 
 LAYER
52. KAMMYSLIWIEC MULTILAYERED 
 ARCHITECTURE?
53. KAMMYSLIWIEC CONTROLLER DATA
 ACCESS
54. KAMMYSLIWIEC app.get(‘/organizations/:id’, (req, res) => { Organization.find({ name: 'JsCamp' }, (err, value) => res.json(value)); });
55. KAMMYSLIWIEC app.get(‘/organizations/:id’, (req, res) => { Organization.find({ name: 'JsCamp' }, (err, value) => res.json(value)); });
56. KAMMYSLIWIEC CONTROLLER DATA
 ACCESS SERVICE
57. KAMMYSLIWIEC ENTITIES
58. KAMMYSLIWIEC CONTROLLER DATA
 ACCESS SERVICE DOMAIN
 MODEL
59. KAMMYSLIWIEC BE PROGRESSIVE
60. KAMMYSLIWIEC app.get('/users', (req, res) => { usersService.findAll() .then((users) => { for (let user of users) { delete user.password; } return users; }) .then((users) => res.json(users)); });
61. KAMMYSLIWIEC app.get('/users', (req, res) => { usersService.findAll() .then((users) => { for (let user of users) { delete user.password; } return users; }) .then((users) => res.json(users)); });
62. KAMMYSLIWIEC app.get('/users', (req, res) => { usersService.findAll() .then((users) => { for (let user of users) { delete user.password; } return users; }) .then((users) => res.json(users)); });
63. KAMMYSLIWIEC app.get('/users', (req, res) => { usersService.findAll() .then((users) => { for (let user of users) { delete user.password; } return users; }) .then((users) => res.json(users)); });
64. KAMMYSLIWIEC @Get('users') async findAll() { return await this.usersService.findAll() .filter(user => !user.isDisabled) .map(user => omit(user, 'password')); }
65. KAMMYSLIWIEC @Get('users') async findAll() { return await this.usersService.findAll() .filter(user => !user.isDisabled) .map(user => omit(user, 'password')); }
66. KAMMYSLIWIEC @Get('users') async findAll() { return await this.usersService.findAll() .filter(user => !user.isDisabled) .map(user => omit(user, 'password')); }
67. KAMMYSLIWIEC TYPES
68. KAMMYSLIWIEC TYPES ARE 
 PRICELESS
69. KAMMYSLIWIEC TRADE-OFF?
70. KAMMYSLIWIEC TYPESCRIPT
71. KAMMYSLIWIEC MODULE FACADE
72. KAMMYSLIWIEC FACADE INPUT OUTPUT
73. KAMMYSLIWIEC LET’S DRAW 
 CONCLUSIONS
74. KAMMYSLIWIEC CLEAN ARCHITECTURE
 
 BOILERPLATE & DESIGN SPECIFICATION
 NOT DEVELOPER-FRIENDLY
75. KAMMYSLIWIEC NESTJS WWW.NESTJS.COM
 @NESTFRAMEWORK

76. KAMMYSLIWIEC WHY?
77. KAMMYSLIWIEC WE ARE NOT ANOTHER FRAMEWORK
78. KAMMYSLIWIEC WE ARE THE OPPOSITE
79. KAMMYSLIWIEC LOW ENTRY
 THRESHOLD
80. KAMMYSLIWIEC FULLY-FEATURED
81. KAMMYSLIWIEC REACTIVE
82. KAMMYSLIWIEC COMPATIBILITY
83. KAMMYSLIWIEC
84. KAMMYSLIWIEC
85. KAMMYSLIWIEC OPEN SOURCE
86. KAMMYSLIWIEC
87. KAMMYSLIWIEC THANK
 YOU @KAMMYSLIWIEC