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springboot

Seedtag Codetest 2: Backend Engineer

Bootstrap application for testing a rest API, Codetest 2

springboot run springboot app

gradle wrapper
./gradlew build
./gradlew build bootRun

or run fat jar

java -jar build/libs/radar-rest-service-0.1.0.jar

docker Dockerize the app

From the project root folder exec the commands to create a docker image and run it:

for macosx start the docker daemon

killall Docker && open /Applications/Docker.app

then execute the next commands in order to create the docker image and run it:

docker build -f docker/Dockerfile . -t radar
docker run -p 8888:8888 radar

to stop the application first we have to stop the docker process and then kill the docker process:

docker stop $(docker ps -a -q)
docker rm $(docker ps -a -q)

to clean the docker images from the system:

docker images
docker rmi PID

Once you have the dockerized app is really easy bring it to the cloud. You look for a cloud provider to deploy it and host it.

swagger Swagger

You can see the swagger documentation in the following url:

get health

curl -X GET -i "http://localhost:8888" -H "Content-type: application/json" -H "Accept: application/json"

post radar

curl -X POST -i "http://localhost:8888/radar" -H "Content-type: application/json" -H "Accept: application/json" -d '{"protocols":["avoid-mech"],"scans":[{"coordinates":{"x":0,"y":40},"enemies":{"type":"soldier","number":10}}]}'

actuator spring plugin for health check, status and stop service

curl localhost:8888/actuator/health
curl localhost:8888/actuator/info
curl localhost:8888/actuator/shutdown

TIPS

killing processes

ps -aux | grep "radar-rest-service-0.1.0.jar"
kill -9 $(jps | grep -i "radar-rest-service-0.1.0.jar" | awk '{print $1}')

closing ports

sudo lsof -i :8888
sudo kill -9 PID

installing spring cli

https://docs.spring.io/spring-boot/docs/2.0.5.RELEASE/reference/htmlsingle/#getting-started-installing-the-cli

sdk install springboot

intellij tips

avoid out folder

File | Project Structure | Project Settings | Modules | Paths tab | Compiler output Select 'use module compile output path' and add the build main and test folders

add navigation arrows to the toolbox

preferences | navigation bar toolbar click + button add the left and right arrows from the navigation list

organize imports like eclipse

preferences | editor | general | auto imports marks the checks with 'unambiguos' labels

spring guides

create a new spring project from the scratch

First of all, you can generate the scaffolding of this project using the INITIALIZR tool: https://start.spring.io/