- \n
- Spring boot is a module that provides rapid application development feature to the spring framework including auto-configuration<\/strong>, standalone-code<\/strong>, and production-ready<\/strong> code<\/li>\n
- It creates applications that are packaged as jar<\/em> and are directly started using embedded servlet container (such as Tomcat, Jetty or Undertow). Thus, no need to deploy the war<\/em> files<\/li>\n
- It simplifies the maven configuration by providing the starter template and helps to resolve the dependency conflicts. It automatically identifies the required dependencies and imports them in the application<\/li>\n
- It helps in removing the boilerplate code, extra annotations, and XML configurations<\/li>\n
- It provides a powerful batch processing and manages the rest endpoints<\/li>\n
- It provides an efficient JPA-starter library<\/em> to effectively connect the application with the relational databases<\/li>\n
- It offers a Microservice architecture and cloud configuration that manages all the application related configuration properties in a centralized manner.<\/li>\n<\/ul>\n
1.2 What is Docker?<\/h3>\n
In the present world, Docker<\/strong> is an important term,<\/p>\n
- \n
- Often used in CI\/CD platform that packages and runs the application with its dependencies inside a container<\/li>\n
- Is a standard for Linux Containers<\/li>\n
- A Container<\/em> is a runtime that runs under any Linux kernel and provides a private machine-like space under Linux<\/li>\n<\/ul>\n\n
![\"spring](\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2020\/06\/Docker-command-basics-img1-2.jpg\")
Fig. 1: Docker basic command<\/figcaption><\/figure>\n<\/div>\n 1.2.1 Docker Terminology<\/h4>\n
- \n
- Image<\/strong>: Representation of Docker container i.e. a JAR or WAR file in Java<\/li>\n
- Container<\/strong>: Runtime of Docker i.e. a deployed and running Docker image. For example, an executable Spring Boot jar<\/li>\n
- Engine<\/strong>: The code that manages, creates and runs the Docker containers<\/li>\n
- Hub<\/strong>: A public developers registry to distribute their code<\/li>\n
- Repository<\/strong>: A collection of Docker related images i.e. different versions of the same application<\/li>\n<\/ul>\n
1.3 What is Redis?<\/h3>\n
- \n
- Redis is an open-source in-memory data store written in the C programming language<\/li>\n
- Offers a distributed, in-memory key-value database with optional durability<\/li>\n
- Often used as a database, cache, or as a message broker and supports different kinds of database types, such as strings, lists, maps, sets or sorted sets, etc.<\/li>\n
- It is fast and operations are atomic in nature (i.e. two clients can concurrently access the data and Redis server will receive the updated value)<\/li>\n
- Offers utilities like caching and messaging-queues<\/li>\n<\/ul>\n
In this tutorial, we will create a spring boot application<\/em> and integrate it with Redis<\/em> to understand its basic concepts. But before going any further I\u2019m assuming that readers are aware of the concepts of creating and running a basic spring boot application.<\/p>\n
2. Spring Boot with Redis Tutorial<\/h2>\n
2.1 Application Pre-requisite<\/h3>\n
To start with this tutorial, we are hoping that users at present have the Docker installation completed. If someone needs to go through the Docker installation, please watch this<\/a> video.<\/p>\n
2.2 Tools Used and Project Structure<\/h3>\n
We are using Eclipse, JDK 8, Maven, and Docker. In case you\u2019re confused about where you should create the corresponding files or folder, let us review the project structure of the spring boot application.<\/p>\n
\n![\"spring](\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2020\/06\/springboot-redis-project-structure-guide-image1-1.jpg\")
Fig. 2: Project structure<\/figcaption><\/figure>\n<\/div>\n Let us start building the application!<\/p>\n
3. Pulling the Redis image from Docker Hub & Starting it<\/h2>\n
To have the Redis up and working on the localhost<\/em> environment, we will pull the Redis image from Docker<\/span> and start the container. Users can refer the following commands to pull the image and later start the container.<\/p>\n
Docker commands<\/em><\/span><\/p>\n
\n\n
- Container<\/strong>: Runtime of Docker i.e. a deployed and running Docker image. For example, an executable Spring Boot jar<\/li>\n
- Image<\/strong>: Representation of Docker container i.e. a JAR or WAR file in Java<\/li>\n
- It creates applications that are packaged as jar<\/em> and are directly started using embedded servlet container (such as Tomcat, Jetty or Undertow). Thus, no need to deploy the war<\/em> files<\/li>\n
![\"\"](\"https:\/\/examples.javacodegeeks.com\/wp-content\/uploads\/2020\/06\/springboot-redis-docker-container-start-image1.jpg\")