.NET Microservices: CQRS & Event Sourcing with Kafka

8h 31m 56s
English
Paid
May 13, 2024

In this course, you will learn how to create .NET microservices that comply with the CQRS and Event Sourcing patterns. You will not use any CQRS framework, but you will write every line of code that is required to effectively create your own CQRS and Event Sourcing framework using C# and Apache Kafka. While this might sound a little daunting, you will be carefully guided step by step, and gain all the know-how and confidence to become an expert in CQRS and Event Sourcing.

More

By the end of this course, you will know how to:

  • Handle commands and raise events.
  • Use the mediator pattern to implement command and query dispatchers.
  • Create and change the state of an aggregate with event messages.
  • Implement an event store / write database in MongoDB.
  • Create a read database in MS SQL.
  • Apply event versioning.
  • Implement optimistic concurrency control.
  • Produce events to Apache Kafka.
  • Consume events from Apache Kafka to populate and alter records in the read database.
  • Replay the event store and recreate the state of the aggregate.
  • Separate read and write concerns.
  • Structure your code using Domain-Driven-Design best practices.
  • Replay the event store to recreate the entire read database.
  • Replay the event store to recreate the entire read database into a different database type - PostgreSQL.

The ultimate goal of this course is to take a deep-dive into the world of CQRS and Event Sourcing to enable you to create microservices that are super decoupled and extremely scalable.

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# Title Duration
1 Microservices Basics 03:52
2 CQRS 02:27
3 Event Sourcing 01:22
4 Architecture Overview 06:50
5 Apache Kafka 01:04
6 Setup & Structure Section Intro 00:27
7 Prerequisites 08:09
8 Run Kafka in Docker 05:39
9 Run MongoDB in Docker 02:34
10 Run Microsoft SQL in Docker. 05:07
11 Basic Project Setup 08:59
12 Adding Project References 10:21
13 Adding NuGet Packages 05:21
14 Setup Debug Configurations (VS Code Only) 02:52
15 What is a Command? 00:55
16 Commands 05:01
17 What is an Event? 00:32
18 Events 08:23
19 The Mediator Pattern 03:11
20 ICommandDispatcher Interface (The Mediator) 02:47
21 CommandDispatcher (The Concrete Mediator) 05:33
22 What is an Aggregate? 02:17
23 AggregateRoot 09:51
24 PostAggregate Part 1 12:27
25 PostAggregate Part 2 08:21
26 What is an Event Store? 01:04
27 EventModel 03:23
28 IEventStoreRepository Interface 02:34
29 EventStoreRepository 09:17
30 IEventStore Interface 01:21
31 EventStore 11:27
32 IEventSourcingHandler Interface 01:43
33 EventSourcingHandler 06:56
34 The Mediator Pattern Continued 00:46
35 ICommandHandler Interface (The Abstract Colleague) 01:55
36 CommandHandler (The Concrete Colleague) 10:07
37 Register Command Handlers 05:09
38 Kafka Producer 03:19
39 EventProducer Interface & Implementation 10:02
40 Producing an Event 05:34
41 Important DDD Concepts 01:26
42 Domain Entities 05:28
43 IPostRepository Interface 03:47
44 ICommentRepository Interface 01:47
45 The Read Database 00:27
46 DatabaseContext 09:34
47 Programmatically Create DB & Tables on Startup 07:44
48 PostRepository 08:27
49 CommentRepository 05:03
50 Event Handling Introduction 00:21
51 IEventHandler Interface 01:43
52 EventHandler 09:43
53 Kafka Consumer 03:40
54 IEventConsumer Interface 00:39
55 EventJsonConverter 07:49
56 EventConsumer 11:58
57 ConsumerHostedService 06:36
58 Command Controllers Intro 00:39
59 Data Transfer Objects 01:25
60 NewPostController 08:30
61 Creating a New Social Media Post 15:05
62 EditMessageController 05:33
63 Edit Message of a Social Media Post 12:09
64 LikePostController 03:25
65 Like a Social Media Post 10:57
66 AddCommentController 03:07
67 Add a Comment to a Social Media Post 11:25
68 EditCommentController 03:20
69 Edit a Comment on a Social Media Post 12:12
70 RemoveCommentController 04:24
71 Delete a Comment from a Social Media Post 11:09
72 DeletePostController 02:57
73 Deleting a Social Media Post 10:21
74 The Mediator Pattern (Query Dispatching) 01:03
75 Social Media Queries 03:37
76 IQueryDispatcher Interface (The Mediator) 03:34
77 QueryDispatcher (The Concrete Mediator) 05:45
78 Query Handling Introduction 00:23
79 IQueryHandler Interface (The Abstract Colleague) 01:45
80 QueryHandler (The Concrete Colleague) 04:29
81 Register Query Handlers 04:25
82 Query Controller Intro 00:18
83 Data Transfer Objects 01:14
84 PostLookupController Part 1 09:59
85 PostLookupController Part 2 09:00
86 Testing the PostLookupController 16:49
87 Powerful Ending Intro 00:41
88 Create Functionality to Restore the Read Database 12:28
89 Restore the Entire Read Database 20:06
90 Rapidly Change the Read Database Type 14:06
91 Congratulations 00:25

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