create-spring-boot-kotlin-project

$2a

Download Spring Boot project template

• Run following command in terminal to download a Spring Boot project template

curl https://start.spring.io/starter.zip \

  -d artifactId=${input:projectName:demo-kotlin} \

  -d bootVersion=3.4.5 \

  -d dependencies=configuration-processor,webflux,data-r2dbc,postgresql,data-redis-reactive,data-mongodb-reactive,validation,cache,testcontainers \

  -d javaVersion=21 \

  -d language=kotlin \

  -d packageName=com.example \

  -d packaging=jar \

  -d type=gradle-project-kotlin \

  -o starter.zip

Unzip the downloaded file

• Run following command in terminal to unzip the downloaded file

unzip starter.zip -d ./${input:projectName:demo-kotlin}

Remove the downloaded zip file

• Run following command in terminal to delete the downloaded zip file

rm -f starter.zip

Unzip the downloaded file

• Run following command in terminal to unzip the downloaded file

unzip starter.zip -d ./${input:projectName:demo-kotlin}

Add additional dependencies

• Insert springdoc-openapi-starter-webmvc-ui and archunit-junit5 dependency into build.gradle.kts file

dependencies {

  implementation("org.springdoc:springdoc-openapi-starter-webflux-ui:2.8.6")

  testImplementation("com.tngtech.archunit:archunit-junit5:1.2.1")

}

• Insert SpringDoc configurations into application.properties file

# SpringDoc configurations

springdoc.swagger-ui.doc-expansion=none

springdoc.swagger-ui.operations-sorter=alpha

springdoc.swagger-ui.tags-sorter=alpha

• Insert Redis configurations into application.properties file

# Redis configurations

spring.data.redis.host=localhost

spring.data.redis.port=6379

spring.data.redis.password=rootroot

• Insert R2DBC configurations into application.properties file

# R2DBC configurations

spring.r2dbc.url=r2dbc:postgresql://localhost:5432/postgres

spring.r2dbc.username=postgres

spring.r2dbc.password=rootroot

spring.sql.init.mode=always

spring.sql.init.platform=postgres

spring.sql.init.continue-on-error=true

• Insert MongoDB configurations into application.properties file

# MongoDB configurations

spring.data.mongodb.host=localhost

spring.data.mongodb.port=27017

spring.data.mongodb.authentication-database=admin

spring.data.mongodb.username=root

spring.data.mongodb.password=rootroot

spring.data.mongodb.database=test

-

Create docker-compose.yaml at project root and add following services: redis:6, postgresql:17 and mongo:8.

• redis service should have

• password rootroot

• mapping port 6379 to 6379

• mounting volume ./redis_data to /data

• postgresql service should have

• password rootroot

• mapping port 5432 to 5432

• mounting volume ./postgres_data to /var/lib/postgresql/data

• mongo service should have

• initdb root username root

• initdb root password rootroot

• mapping port 27017 to 27017

• mounting volume ./mongo_data to /data/db

-

Insert redis_data, postgres_data and mongo_data directories in .gitignore file

-

Run gradle clean test command to check if the project is working

./gradlew clean test

• (Optional) docker-compose up -d to start the services, ./gradlew spring-boot:run to run the Spring Boot project, docker-compose rm -sf to stop the services.

Let's do this step by step.