What you'll learn

Apache Kafka and its Internals
Build Enterprise Standard Kafka Client Applications using Spring Boot
Writing Unit Tests using JUnit
Writing Integration tests using JUnit and Embedded Kafka
Build End to End application using Kafka Producer/Consumer and Spring Boot

Requirements

Java 11 or greater is required
Intellij or Eclipse or Similar IDE
Knowledge about Spring Boot
Experience writing tests using JUnit
Gradle or Maven Knowledge is needed

Description

This course is structured to give you a theoretical and coding experience with Apache Kafka using SpringBoot. This course is targeted for developers who would like to build enterprise standard Kafka Client applications using SpringBoot.

If you are looking forward to learning the below-listed things:

Use cases where Kafka fits really well

Internals of Kafka and how it works

Built Enterprise Standard Kafka Client Applications using Producer/Consumer API using Spring Boot

Unit/Integration Tests for the Kafka Client Applications

Then this is the right course for you. This is a pure hands-on oriented course where you will be learning the concepts through code.

By the end of this course, you will have a complete understanding of coding and implementing Kafka Clients using SpringBoot with Producer/Consumer API.

Getting Started with Kafka

In this section, I will give you all a quick introduction to Apache Kafka, terminologies and different client APIs that are part of Kafka

Download and Install Kafka

In this section, we will download the Kafka distribution from the Kafka Website.

Understanding Kafka Components and its Internals - (Theory + Hands-On)

In this section, we will explore the Kafka internals from a theoretical perspective followed by hands-on exploring the Kafka internals.

Learn about the Topics and Partitions in Kafka

Setup a Local Kafka Cluster with Multiple Brokers

Producer/Consumer messages in the Kafka Cluster

Learn about Consumer Offsets and Consumer Groups

Commit Log and Retention Policy

Learn about Kafka Load Distribution and Fault Tolerance and Robustness

Application OverView

This section covers the application that we are going to build as part of this course.

Build SpringBoot Kafka Producer - Hands-On

In this section, we will learn about building a Kafka Producer using Spring Boot.

Build RestAPI through which the events can be posted into the application from the outside world

Explore KafkaTemplate to publish the data into the Kafka Topic

Learn different approaches to produce the message into the Kafka

Learn to publish the Kafka Record using Headers

Integration Testing using JUnit5 - Hands-On

In this section, we will learn about different approaches to writing Integration tests using Embedded Kafka.

Write Integration test cases to interact with the API using JUnit5

Write Integration test cases to interact with Embedded Kafka using JUnit5

Unit Testing using JUnit5- Hands-On

In this section, we will learn about different approaches to writing unit tests Kafka Producer.

Write Unit Tests to the controller layer using @WebMVC annotation and MockMVC

Add the validations to the request payload in the endpoint

Write Custom Error Handler for different response codes

Kafka Producer - Sending Message With Key - Hands-On

In this section, we will learn about sending the record to Kafka Topic with Key.

Kafka Producer - Important Configurations

In this section, we will learn about different key configurations to consider when it comes to reliable message delivery to Kafka

Build SpringBoot Kafka Consumer - Hands-On

In this section, we will learn about building a Kafka Consumer using Spring Boot.

Set up the base consumer project library-events consumer

Learn about different Spring Kafka Terminologies which are necessary to configure a Kafka Consumer

Learn about how to configure a Kafka Consumer using the @KafkListener Annotation

Learn about how "Spring Boot Auto Configuration works behind the scenes for Kafka Consumer"

Consumer Groups and Consumer Offset Management- Hands-On

In this section, we will code and learn about consumer groups and offset management.

Demonstration how Consumer Groups plays a vital role when it comes to scalable message consumption and consumer rebalance

Learn about the Default consumer offset management by Kafka

Learn about how consumer offset can be manually managed from the application

Demonstration of how to achieve scalable message consumption by increasing the concurrency level to greater than 1

Persisting Library Events in DB - Using H2 InMemory DataBase

In this section, we will code and learn about integrating the DB layer into the library-events-consumer using Spring JPA.

Configuring the H2 In-Memory DB

Create LibraryEvent and Book Entity

Build Service Layer to process LibraryEvent - ADD Event Type

Build Service Layer to process LibraryEvent - MODIFY Event Type

Integration Testing using Embedded Kafka - Kafka Consumer

In this section, we will code and learn to write the Integration tests for the Kafka Consumer.

Configure Embedded Kafka for Integration Tests

Write the Integration test for posting a "NEW" LibraryEvent

Write the Integration test for posting an "UPDATE" LibraryEvent

Integration Tests for Real Databases using TestContainers

Error Handling, Retry and Recovery - Kafka Consumers

In this section, we will learn about the different error handling techniques that are available for Kafka Consumer.

Custom Error Handler

Retry in Kafka Consumer

Retry SpecificExceptions using Custom RetryPolicy

Recovery in Kafka Consumer

Handling Recovery in Kafka Consumer

Error Handling, Retry/Recovery - Kafka Producer

Error Handling in Kafka Producer

Retry in Kafka Producer - Broker Not Available

Retry in Kafka Producer - Min.in.sync.replicas

Retain/Recover Failed Records in Kafka Producer

By the end of this you will have a complete understand and knowledge of building enterprise standard Kafka Consumers and Producers using Spring Boot with the Unit and Integration tests using EmbeddedKafka.
Who this course is for:

Java/Spring Developers who would like to build Producers/Consumers using Apache Kafka
Anyone willing to learn about Apache Kafka and implement using SpringBoot

Screenshots

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