enable-spring-boot-2

Demo and Playground to explore Spring Boot 2 latest features

Topics

1. Display all auto configuration classes

• IntelliJ IDEA option
• log

2. Inject properties

• default path: application.yaml, application.properties
• default path with profile sections
• specific path on classpath

3. @Configuration override

• Security
• Logging Pattern
• Metrics
• Health

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Index

• Getting Started
• Checklist
• Extras

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Getting Started

1. Spring Boot App

DemoForSpring2Application.java

2. Spring Boot Test

DemoForSpring2ApplicationTests.java

3. Maven Docker build

mvn spring-boot:build-image -Dspring-boot.build-image.imageName=enable-spring-boot-2 -f pom.xml
# Failing: [INFO] I/O exception (java.io.IOException) caught when processing request to {}->docker://localhost:2376: com.sun.jna.LastErrorException: [13] Permission denied
# Apparently due to running docker command as non-root user
# https://stackoverflow.com/questions/48957195/how-to-fix-docker-got-permission-denied-issue

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Checklist

Spring

• upgrade to latest Boot and Cloud versions:
• eureka client: pom.xml, application.yaml, @EnableEurekaClient
• auto-configure H2

Java

• logging levels: application.yaml
• git-plugin-for-actuator: pom.xml -> build.plugins
• Docker image: Dockerfile
• Lombok

Extras

Docker

• status of docker daemon

systemctl status docker

• build

docker build /home/znevzz/Desktop/Projects/Spring/enable-spring-boot-2/ -t enable-spring-boot-2

• view

docker image ls
docker container ls

• run

docker run <IMAGE-ID>/<REPOSITORY> -p <INTERNAL-PORT:EXTERNAL-PORT>
docker run -p 8999:8999 enable-spring-boot-2

• delete

docker image rm <IMAGE-ID>
docker image rm <IMAGE-ID> -f

• enter container

docker exec -it <IMAGE-ID> bash