Mazes

A Maze Generator

JDK

build docker image (50s):

docker build -f Docker/jdk.Dockerfile -t mazes:jdk .

start the app:

docker run -it -ePORT=8080 -p8080:8080 mazes:jdk

or run as cli:

docker run -it -eMAZES_CLI=yes mazes:jdk

JRE

build docker image (50s):

docker build -f Docker/jre.Dockerfile -t mazes:jre .

start the app:

docker run -it -ePORT=8080 -p8080:8080 mazes:jre

Custom JRE with Jlink

build docker image (70s):

docker build -f Docker/custom-jre.Dockerfile -t mazes:custom-jre .

start the app:

docker run -it -ePORT=8080 -p8080:8080 mazes:custom-jre

Jib

build Docker Image (15s):

./mvnw compile jib:dockerBuild -Dimage=mazes:jib

start the app:

docker run -it -ePORT=8080 -p8080:8080 mazes:jib

CNB

build prerequisites:

• docker

build container image with spring-boot CNB plugin (55s):

./mvnw clean spring-boot:build-image \
      -Dspring-boot.build-image.imageName=mazes:cnb

alternatively, we can use the pack cli (50s):

pack build --builder=paketobuildpacks/builder:tiny -eGOOGLE_RUNTIME_VERSION=17 mazes:pack

start the app:

docker run -it -ePORT=8080 -p8080:8080 mazes:cnb

Native CNB

prerequisites for subsequent builds:

• docker (started with 4 CPU & 8Gb RAM)
• java 22.3.1.r17-grl

build native container image with spring-boot CNB plugin (6m25s):

./mvnw clean spring-boot:build-image \
      -Pnative \
      -Dspring-boot.build-image.imageName=mazes:cnb-native

run the app:

docker run -it -ePORT=8080 -p8080:8080 mazes:cnb-native

Native CNB from jar

build AOT processed Spring Boot executable jar (6s):

./mvnw clean package

then build with pack (6m40s):

pack build --builder paketobuildpacks/builder:tiny \
    --path target/mazes-1.0-exec.jar \
    --env 'BP_NATIVE_IMAGE=true' \
    mazes:native-jar-cnb

Native

build from Dockerfile (5m15s):

docker build -f Docker/native.Dockerfile -t mazes:native .

Native Compressed

build from Dockerfile (6m20s):

docker build -f Docker/native-x.Dockerfile -t mazes:native-x .

Bonus: Executable CLI

set environment variable:

export MAZES_CLI=yes

build exe (1m50s):

./mvnw clean package -Pnative

run cli:

target/mazes

target/mazes sw 6 9