harvanir / springboot-kafka-example-consumer

Spring Boot Kafka example consumer

Example of Spring Boot Kafka replying consumer.

How to use

1. Clone the application

git clone https://github.com/harvanir/example.git

2. Download & install kafka

https://kafka.apache.org/downloads
https://kafka.apache.org/quickstart

3. Build the application

mvn clean install

4. Go to kafka directory

localDrive>cd D:\app\kafka_2.12-1.1.0

5. Run the kafka server

D:\app\kafka_2.12-1.1.0>.\bin\windows\zookeeper-server-start.bat .\config\zookeeper.properties
D:\app\kafka_2.12-1.1.0>.\bin\windows\kafka-server-start.bat .\config\server.properties

6. Configure kafka topic: request-topic

D:\app\kafka_2.12-1.1.0>.\bin\windows\kafka-topics.bat -create --topic request-topic --replication-factor 1 --partitions 10 --zookeeper localhost:2181

7. Run the spring boot application (multiple instance consumer)

java -jar -Dserver.port=8082 target/springboot-kafka-example-consumer-0.0.1-SNAPSHOT-exec.jar
java -jar -Dserver.port=8083 target/springboot-kafka-example-consumer-0.0.1-SNAPSHOT-exec.jar

8. Access the application via kafka

Topic   = request-topic
Payload =
{
	"firstNumber": 1,
	"secondNumber":2
}