Spring Cloud's Microservice Practice

Spring Cloud’s Microservice Practice

With the continuous development of Internet technology, microservice architecture has become a very popular architecture among Internet companies. As a popular microservice framework, Spring Cloud has been widely used in enterprises. This article will introduce how to use Spring Cloud to build a microservice architecture.

Step one: Build the Spring Cloud environment

1. Install JDK
   First, we need to install the JDK environment. Spring Cloud is developed based on the Java language, so the JDK must be installed first. .
2. Installing Maven
   Maven is an important tool for Java project management. We need to use Maven to build Spring Cloud projects.
3. Download Spring Boot and Spring Cloud
   We need to download the latest versions of Spring Boot and Spring Cloud. Spring Boot provides a fast, efficient and convenient way to build applications based on the Spring framework. Spring Cloud provides the services needed to build distributed applications.

Step 2: Create a service registration center

The service registration center is one of the most important parts of the microservice architecture. Its role is to register each microservice application into it. , to facilitate mutual calls between microservices. The following describes how to create a simple service registration center.

1. Create Maven Project
   Use Maven to create a new Java project and add Spring Boot and Spring Cloud dependencies in the pom.xml file.
2. Configure service registration center
   Add the following configuration in the application.properties or application.yml file in the project:

server.port: 8761
spring.application .name: eureka-server
eureka.client.registerWithEureka: false
eureka.client.fetchRegistry: false
eureka.client.serviceUrl.defaultZone: http://localhost:${server.port}/ eureka/

3. Start the service registration center
   Use Maven to build and start the service registration center application. Visit http://localhost:8761 in the browser, and you should be able to see the console of the service registration center.

Step 3: Create a microservice application

Now that we have a service registry, we need to create a microservice application and register it with the service registry in the center.

1. Create Maven Project
   Use Maven to create a new Java project and add Spring Boot and Spring Cloud dependencies in the pom.xml file.
2. Configuring the application
   Add the following configuration in the application.properties or application.yml file in the project:

server.port: 8081
spring.application. name: microservice-sample

3. Create a microservice controller
   Create a simple controller and write an API method in it.
4. Start the microservice application
   Use Maven to build and start the microservice application.
5. Register microservice application
   Use the @EnableDiscoveryClient annotation provided by Spring Cloud to register the microservice application into the service registration center.

Step 4: Call the microservice application

Now that we have a microservice application registered in the service registration center, next we need to call the microservice application it provides API methods.

1. Create a microservice consumer application
   Create a new Java project and add Spring Boot and Spring Cloud dependencies in the pom.xml file.
2. Configuring the application
   Add the following configuration in the application.properties or application.yml file in the project:

server.port: 8082
spring.application. name: microservice-consumer

3. Write API calling code
   Write a simple Java class in which to call the API method of the microservice application.
4. Start the microservice consumer application
   Use Maven to build and start the microservice consumer application. Visit http://localhost:8082/api/microservice-sample to see the microservice application. The response information of the provided API method.

Summary:

This article introduces how to use Spring Cloud to build a microservice architecture. First we created a service registration center, then created a microservice application and registered it in the service registration center. Finally, we created a microservice consumer application to call the API methods provided by the microservice application. Through the examples in this article, I believe you can already master how to use Spring Cloud to build a microservice architecture.

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