{"id":4040,"date":"2023-11-04T23:14:01","date_gmt":"2023-11-04T23:14:01","guid":{"rendered":"http:\/\/localhost:10003\/building-microservices-with-spring-boot\/"},"modified":"2023-11-05T05:48:23","modified_gmt":"2023-11-05T05:48:23","slug":"building-microservices-with-spring-boot","status":"publish","type":"post","link":"http:\/\/localhost:10003\/building-microservices-with-spring-boot\/","title":{"rendered":"Building microservices with Spring Boot"},"content":{"rendered":"
Microservices have become the architecture of choice for modern web applications. This is because microservices offer agility, scalability, and availability \u2013 key requirements for modern web applications.<\/p>\n
Spring Boot is a popular framework for building Java-based web applications, and it\u2019s also great for building microservices. In this tutorial, we\u2019ll discuss how to build microservices with Spring Boot.<\/p>\n
Microservices are small, independent services that work together to form a larger application. Each microservice is responsible for a specific function, such as user authentication, order processing, or product search. Microservices communicate with each other using lightweight protocols like HTTP.<\/p>\n
One of the key benefits of microservices is that they offer agility. Since each microservice is independent, it can be developed, tested, and deployed individually. This allows developers to release new features more quickly and with less risk.<\/p>\n
Another benefit of microservices is that they offer scalability. Since each microservice can be deployed independently, it\u2019s easier to scale individual services as needed. For example, if a product search service is getting bogged down with traffic, it can be scaled up without affecting other services.<\/p>\n
Finally, microservices offer availability. Since each microservice is independent, the failure of one doesn\u2019t necessarily affect the others. This makes the overall application more resilient and reliable.<\/p>\n
Spring Boot is a popular framework for building Java-based web applications. It provides a number of features that make building microservices easier, such as RESTful web services, embedded servers, and auto-configuration.<\/p>\n
In this tutorial, we\u2019ll build a simple microservice with Spring Boot. Our microservice will allow users to retrieve information about products in an online store.<\/p>\n
To get started, we\u2019ll need to create a new Spring Boot project. There are a couple of ways to do this, but one of the easiest is to use the Spring Initializr.<\/p>\n
Next, we\u2019ll create a model for our products. We\u2019ll use the following fields:<\/p>\n
To create the model, create a new file called The Next, we\u2019ll create a repository for our products. The repository is responsible for interacting with the database to perform CRUD (create, read, update, delete) operations on our products.<\/p>\n To create the repository, create a new file called The Next, we\u2019ll create a controller for our products. The controller is responsible for handling HTTP requests and returning responses.<\/p>\n To create the controller, create a new file called The The Inside the method, we call the We\u2019ve now created all the necessary components for our microservice. To run the application, open a terminal window and navigate to the root directory of the project. Type the following command:<\/p>\n This will start the embedded server and deploy our application. The terminal window should display some output indicating that the application has started successfully.<\/p>\n Our microservice is now up and running and we can start accessing it. To retrieve information about a product, we can make a HTTP GET request to the appropriate URL.<\/p>\n If you\u2019re running the application locally, the base URL for the product service is In this tutorial, we\u2019ve discussed how to build microservices with Spring Boot. We\u2019ve created a simple microservice that allows users to retrieve information about products in an online store.<\/p>\n Creating microservices with Spring Boot is relatively easy, thanks to the many features that Spring Boot provides. We hope this tutorial has been helpful in getting you started with building microservices with Spring Boot.<\/p>\n","protected":false},"excerpt":{"rendered":" Microservices have become the architecture of choice for modern web applications. This is because microservices offer agility, scalability, and availability \u2013 key requirements for modern web applications. Spring Boot is a popular framework for building Java-based web applications, and it\u2019s also great for building microservices. In this tutorial, we\u2019ll discuss Continue Reading<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[993,994,94,702,555,991,992,990],"yoast_head":"\nProduct.java<\/code> in the
src\/main\/java\/com\/example\/productservice<\/code> directory.<\/p>\n
package com.example.productservice;\n\nimport javax.persistence.Entity;\nimport javax.persistence.GeneratedValue;\nimport javax.persistence.GenerationType;\nimport javax.persistence.Id;\n\n@Entity\npublic class Product {\n\n @Id\n @GeneratedValue(strategy = GenerationType.AUTO)\n private Long id;\n\n private String name;\n private String description;\n private double price;\n private String imageUrl;\n\n \/\/ getters and setters\n\n public Long getId() {\n return id;\n }\n\n public void setId(Long id) {\n this.id = id;\n }\n\n public String getName() {\n return name;\n }\n\n public void setName(String name) {\n this.name = name;\n }\n\n public String getDescription() {\n return description;\n }\n\n public void setDescription(String description) {\n this.description = description;\n }\n\n public double getPrice() {\n return price;\n }\n\n public void setPrice(double price) {\n this.price = price;\n }\n\n public String getImageUrl() {\n return imageUrl;\n }\n\n public void setImageUrl(String imageUrl) {\n this.imageUrl = imageUrl;\n }\n\n}\n<\/code><\/pre>\n
@Entity<\/code> annotation tells Spring that this class represents a table in the database. The
@Id<\/code> annotation tells Spring that the
id<\/code> field should be the primary key for the table.<\/p>\n
Creating the Product Repository<\/h3>\n
ProductRepository.java<\/code> in the
src\/main\/java\/com\/example\/productservice<\/code> directory.<\/p>\n
package com.example.productservice;\n\nimport org.springframework.data.repository.CrudRepository;\n\npublic interface ProductRepository extends CrudRepository<Product, Long> { }\n<\/code><\/pre>\n
CrudRepository<\/code> interface provides a number of methods for performing CRUD operations on our products. By extending this interface and passing our
Product<\/code> class and the type of the primary key (
Long<\/code>), we get all of these methods for free.<\/p>\n
Creating the Product Controller<\/h3>\n
ProductController.java<\/code> in the
src\/main\/java\/com\/example\/productservice<\/code> directory.<\/p>\n
package com.example.productservice;\n\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.web.bind.annotation.GetMapping;\nimport org.springframework.web.bind.annotation.PathVariable;\nimport org.springframework.web.bind.annotation.RequestMapping;\nimport org.springframework.web.bind.annotation.RestController;\n\n@RestController\n@RequestMapping(\"\/products\")\npublic class ProductController {\n\n @Autowired\n private ProductRepository repository;\n\n @GetMapping(\"\/{id}\")\n public Product getProduct(@PathVariable(\"id\") Long id) {\n return repository.findById(id).orElse(null);\n }\n\n}\n<\/code><\/pre>\n
@RestController<\/code> annotation tells Spring that this class is a controller for RESTful web services. The
@RequestMapping<\/code> annotation specifies that this controller will handle requests with the
\/products<\/code> prefix. The
@Autowired<\/code> annotation tells Spring to automatically inject an instance of the
ProductRepository<\/code> when this controller is created.<\/p>\n
@GetMapping<\/code> annotation specifies that this method will handle HTTP GET requests with a URL that includes an
id<\/code> parameter. The
@PathVariable<\/code> annotation tells Spring to inject the value of the
id<\/code> parameter from the URL into the
id<\/code> parameter of the method.<\/p>\n
findById<\/code> method of the
ProductRepository<\/code> to retrieve the
Product<\/code> with the specified
id<\/code>. If no
Product<\/code> with that
id<\/code> exists, we return
null<\/code>.<\/p>\n
Running the Application<\/h3>\n
mvnw spring-boot:run\n<\/code><\/pre>\n
Accessing the Product Service<\/h3>\n
http:\/\/localhost:8080\/products`. To retrieve information about a specific product, we can append the product\u2019s<\/code>id
to the end of the URL. For example, to retrieve information about the product with an<\/code>id
of 1, we can make a GET request to the URL<\/code>http:\/\/localhost:8080\/products\/1`.<\/p>\n
Conclusion<\/h3>\n