LinkedIn: Spring Boot 2 Essential Training

Playground for the Spring Boot 2 Essential Training from LinkedIn Learning

Section 1.2: Spring Initializr

The submodules of this project are all Spring Boot applications created with the Spring Initializr. The following starters were used:

• room-web-app: web, actuator, thymeleaf, devtools, data-jpa, security
• room-command-line-runner: json, amqp
• room-consumer: json, amqp

The embedded Tomcat (included by the web starter) runs HTTP / port 8080 by default.

Ways to start a Spring Boot jar

During development you will usually start the application (annotated with @SpringBootApplication) in IntelliJ IDEA.

Other ways to start an executable Spring Boot jar are:

• java -jar room-web-app/target/room-web-app-1.0.0.jar
• shell script (makes it easier to add environment variables and properties)
• systemd / init.d (on *nix systems) to let the server control when services start/stop
• cloud ecosystems (e.g. Pivotal Cloud Foundry)
  • cf push pushes a compiled JAR into cloud foundry and automatically runs it

Section 1.5: Use profiles to specify server port

Server ports are configured in application.yml. Specify the active profile like this:

java -jar -Dspring.profiles.active=test target/room-web-app-1.0.0.jar

and the web application can be found at: http://localhost:9000

References

• HTTPie
• YAML
• Some notes on Docker