Day 1: Setup Java sdk, maven and init Quarkus app

Actually, this is not the first day of setup java SDK and init app with quarkus. I tried 1, 2 times before but failed. A lot bugs raised: conflict btw version of openSdk what I am using and what Maven used, …

Finally, after 2 hours dive into research and trying, I successful initiated an Quarkust app by maven.

These are steps that I do:

step 1: Install java 21

• download zip file of java-21-openjdk-amd64

• unzap this file and move to opt

• set default java jdk that system will use
  sudo update-alternatives --set java /usr/lib/jvm/java-21-openjdk-amd64/bin/java

• Set java_home

  export JAVA_HOME=/usr/lib/jvm/java-21-openjdk-amd64
  then check by echo $JAVA_HOME

Step 2: install maven

• install maven latest from maven website
  - download tar file
  - unzip
  - move to opt mv apache-maven-3.6.3 /opt/

• Set maven_home
  (if use fish) update file `.profile`
  - nano .profile
  - copy paste this content:
  set M2_HOME '/opt/apache-maven-3.6.3'
  PATH "$M2_HOME/bin:$PATH"
  export PATH

• Check maven version (mvn -v) to ensure that mvn is using java 21.

Step 3: Init app

• create app folder

• go to inside folder

• open terminal and run script
  mvn io.quarkus.platform:quarkus-maven-plugin:3.14.4:create \ -DprojectGroupId=my-groupId \
  -DprojectArtifactId=api

• Now you have a project tree like below:

  

  yeah yeah

Layout code with OOP

muno/ <-- Project root ├── src/ │ ├── main/ │ │ ├── java/ │ │ │ └── com/ │ │ │ └── muno/ │ │ │ ├── order/ │ │ │ │ ├── OrderResource.java <-- Order API logic │ │ │ │ ├── OrderService.java <-- Order business logic │ │ │ │ └── OrderRepository.java <-- Order data access │ │ │ ├── product/ │ │ │ │ ├── ProductResource.java <-- Product API logic │ │ │ │ ├── ProductService.java <-- Product business logic │ │ │ │ └── ProductRepository.java <-- Product data access │ │ │ ├── auth/ │ │ │ │ ├── AuthResource.java <-- Authentication API logic │ │ │ │ ├── AuthService.java <-- Authentication business logic │ │ │ │ └── AuthRepository.java <-- Authentication data access │ │ │ └── MunoApplication.java <-- Main application entry point │ │ └── resources/ │ │ ├── application.properties <-- Configuration file │ │ ├── META-INF/ │ │ │ └── resources/ <-- Static resources (HTML, CSS, etc.) │ │ └── templates/ <-- Template files (e.g., Thymeleaf) │ └── test/ │ ├── java/ │ │ └── com/ │ │ └── muno/ │ │ ├── order/ │ │ │ └── OrderResourceTest.java <-- Order tests │ │ ├── product/ │ │ │ └── ProductResourceTest.java <-- Product tests │ │ └── auth/ │ │ └── AuthResourceTest.java <-- Authentication tests │ └── resources/ │ └── test-data/ <-- Test-specific resources ├── pom.xml <-- Maven build configuration └── target/ <-- Compiled output (created after building)