UMS

Section 1: Fundamental Ideas Around Microservices

DONE 20200917

Section 2: A Mini-Microservices App

9. App Overview

10. Project Setup

1. make project
2. npx cra client
3. mkdir posts
4. npm init -y
5. npm install express cors axios nodemon
6. mkdir comments
7. same as above

11. Posts Service Creation

WHAT DO YOU WANT YOUR SERVICE TO DO??

1. make index.js
2. const express = require(‘express 3.
3. app.get to posts and app.posts.posts
4. app.listen 4000, 90=>
5. posts = {}
6. randomly generate an id

GOAL: Listening on 4000 for posts

12. Testing the Posts Service

1. use postman

body

content-type application/json

13. Implementing a Comments Service

express bodyparser randomBytes appuse bodyparser.jssn()

comments by post ID

14. Quick Comments Test

15. Note on the React App

16. React Project Setup

1. Delete all files inside src
2. GOAL: “Blog App” display on react app

17. Building Post Submission

1. PostCreate
2. Add Boostrap CSS CDN to anywhere inside the head
3. Add event handler

18. Handling CORS Errors

19. Fetching and Rendering Posts

1. make thing

20. Creating Comments

21. Displaying Comments

22. Completed React App

23. Request Minimization Strategies

24. An Async Solution

25. Common Questions Around Async Events

26. Event Bus Overview

27. A Basic Event Bus Implementation

1. create new event-bus app
2. install express nodemon axios

28. Emitting Events

inside posts make the post request async add axios inside it

await axios.post(our endpoint, our event object)

our event object:

type: ‘PostCreated’, data: {id, title}

29. Emitting Comment Creation Events

type CommentCreated data: { id: commentId, content postId: req.params.id }

30. Receiving Events

31. Creating the Data Query Service

GOAL: We want a single service that connects posts and comments!

1. add query
2. i express cors nodemon

GOAL 2:

1. console log inside query from event bus
2. (event bus no more errors)
3. console log inside event bus as a response from query`

32. Parsing Incoming Events

33. Using the Query Service

34. Adding a Simple Feature

35. Issues with Comment Filtering

36. A Second Approach

37. How to Handle Resource Updates

38. Creating the Moderation Service

1. make boilerplate
2. on comment submit send to pending and send to moderation
3. on moderation finish, send back to comment
4. comment updates to queryservice

---

1. moderation
2. axios express nodemon
3. index.js
4. require statements 5.

39. Adding Comment Moderation

add property ststus: pending add status to comment creation add to query status persist status

40. Handling Moderation

41. Updating Comment Content

42. A Quick Test

43. Rendering Comments by Status

44. Dealing with Missing Events

45. Implementing Event Sync

46. Event Syncing in Action

Section 3: Running Services with Docker

Section 4: Orchestrating Collections of Services with Kubernetes

Section 5: Architecture of Multi-Service Apps

Section 6: Leveraging a Cloud Environment for Development

Section 7: Response Normalization Strategies

Section 8: Database Management and Modeling

Section 9: Authentication Strategies and Options

Section 10: Testing Isolated Microservices

Section 11: Integrating a Server-Side-Rendered React App

Section 12: Code Sharing and Reuse Between Services

Section 13: Create-Read-Update-Destroy Server Setup

Section 14: NATS Streaming Server - An Event Bus Implementation

Section 15: Connecting to NATS in a Node JS World

Section 16: Managing a NATS Client

Section 17: Cross-Service Data Replication In Action

Section 18: Understanding Event Flow

Section 19: Listening for Events and Handling Concurrency Issues

Section 20: Worker Services

Section 21: Handling Payments

Section 22: Back to the Client

Section 23: CI/CD

Section 24: [Appendix A] - Basics of Docker

500 – What is a container?

Section 25: [Appendix B] - Basics of Typescript

Section 26: Bonus!