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Spring Blog

This is a sample blog application that I created to use as an example of how to take a Spring Boot application to production. It's not enough to understand how to create applications, you need to understand how to take them to production. This document will walk you through what this application is, how to run it and how to execute the tests associated with it.

About the Application

This is a simple web application that exposes a REST API. This application uses Maven as the build tool and the current LTS version of Java, 17. I hope to add more functionality to this application in the future but for now this project uses the following dependencies:

  • Spring Web
  • Spring Data JDBC
  • PostgreSQL Database
  • Spring Actuator
  • Testcontainers

Running the application

You can run this application from your favorite IDE or by running the following command:

./mvnw spring-boot:run

Testing the application

This application uses Junit 5 and Tescontainers. To run the tests you will need Docker desktop installed and running. You need Docker to execute the tests because this application uses Testcontainers to spin up PostgreSQL database. This allows us to test as close to production as possible on our development machines as well as a clean and reproducible testing environment each time.

Building for Production

If you want to build an artifact that can be used in production you have 2 options. This application uses JAR as the packaging type. This means that you can run the following command to create something that is ready to be used in production.

./mvnw clean package

If you would like to create a Docker Image which can be used on a variety of platforms you can run the following command:

./mvnw spring-boot:build-image

Spring to Production

This is a collection of the different platforms that I have pushed this application to. I will also include any information that might help you out and any related tutorials I have created for that platform. The idea for this project came from an episode of Spring Office Hours in which DaShaun and I discussed some different options for taking your Spring Boot application to production.

Spring Office Hours: Episode 15 - Spring to Production

Local Development

When working on this application locally you will need Docker Desktop installed. To start an instance of PostgreSQL run the Docker Compose file located in the root of the project.

Azure Spring Apps

Azure Spring Apps is a platform as a service (PaaS) for Spring developers. Manage the lifecycle of your Spring Boot applications with comprehensive monitoring and diagnostics, configuration management, service discovery, CI/CD integration, and blue-green deployments.

https://azure.microsoft.com/en-us/products/spring-apps

GitHub Actions

You could create a new artifact each time and deploy it to Azure Spring Apps using the Azure CLI. This can be tedious though and if you want to deploy a new version of your application each time a commit is made or merged into the master branch you can use GitHub actions. The following is a workflow that I am currently using to do that.

name: AzureSpringCloud
on: push
env:
  ASC_PACKAGE_PATH: ${{ github.workspace }}
  JAVA_VERSION: 17
  AZURE_SUBSCRIPTION: YOUR_SUBSCRIPTION_ID_HERE

jobs:
  deploy_to_production:
    runs-on: ubuntu-latest
    name: deploy to production with artifact
    steps:
      - name: Checkout Github Action
        uses: actions/checkout@v2
        
      - name: Set up JDK ${{ env.JAVA_VERSION }}
        uses: actions/setup-java@v1
        with:
          java-version: ${{ env.JAVA_VERSION }}

      - name: maven build, clean
        run: |
          mvn clean package -DskipTests

      - name: Login via Azure CLI
        uses: azure/login@v1
        with:
          creds: ${{ secrets.AZURE_CREDENTIALS }}

      - name: deploy to production with artifact
        uses: azure/spring-cloud-deploy@v1
        with:
          azure-subscription: ${{ env.AZURE_SUBSCRIPTION }}
          action: Deploy
          service-name: spring-blog
          app-name: spring-blog
          use-staging-deployment: false
          package: ${{ env.ASC_PACKAGE_PATH }}/**/*.jar

Coming Soon