In this article, I will integrate the Springfox swagger2 package to implement the Swagger 2 API documentation in the spring boot application. In this article, We will learn how to configure swagger with spring boot application to generate automatically Rest API document or we can say Spring boot Rest API document using swagger. $ java -jar -Dapp.api.swagger.enable=false spring-boot-app-1.0.jar OR $ java -jar spring-boot-app-1.0.jar --app.api.swagger.enable=false Hide Endpoints from Swagger Documentation. Swagger is a framework or tool that brings much-needed automation to the task of documenting APIs. It specifies the format (URL, method, and representation) to describe REST web services. It uses version 2 of the Swagger specification. It is good to include just the essential information which is not obvious and which is not already covered well by auto-generated information. here is an official site of swagger. Post was not sent - check your email addresses! More than that, we can use this API like Postman to test our API, as well. Swagger configuration in Spring Boot Application To configure swagger in any of the SpringBoot application, we need to follow the below steps explained.. We need to add required dependencies to the pom.xml file. Enter your desired messages as key-value pairs where key will be used as placeholder - e.g. Now your documentation should contain also the descriptions provided: Note that our controller and domain classes are now plagued with Swagger specific annotations. Maybe some part of the API is internal and should not be part of the public documentation. You cannot really support multiple languages. We can see the student details saved successfully in the response. In case built-in options are not enough for you, you can always provide your own predicate for both apis() and paths(). This project is a Swagger2Markup (AsciiDoc and GitHub Flavored Markdown) converter demo using Spring Boot, springfox and spring-restdocs. It can take a lot of space, polluting your code. You can, of course, mix and match with JSR-303 annotations. @ApiModelProperty's example is useful for providing example values, which is good not only for the guidance of users but also it is used to prefill a request payload when using Swagger UI as a REST client to test your services. It will generate HTML documentation using the swagger2 metadata. For this article, I used SpringFox 2.9.2 and Spring Boot 1.5.10.RELEASE. An alternative way of ignoring certain classes or methods is to annotate them with @ApiIgnore. Add a request param without documenting it and your tests are no longer green. For this article, we will use the Springfox implementation of the Swagger 2 specification. Create a new Spring Boot application and add spring-boot-starter-web, lombok(To reduce boiler plate code), spring-boot-starter-data-jpa, and h2 dependencies. We can pass multiple @ApiResponse annotations as a value field as shown in the above example. Configure Swagger 2 in Spring Boot Application. The support should be available in the next version. To work with SpringFox in your project, you need to add it as a dependency first. This configuration is enough to integrate Swagger 2 into existing Spring Boot project. Documenting your REST API is very important. It's called Spring Rest Docs. It can also recognize JSR-303 annotations, so you'll have also documented all the constraints on your model classes. It's quite handy. Of course, you can provide many more configuration settings as we'll see later, but this is a minimalistic configuration, which does the following: If you deploy your application now, swagger metadata describing your API is already being generated! by Moisés Macero on March 4, 2017. Same as you could annotate your model classes with Swagger core annotations to provide additional metadata, you can annotate your controllers and their methods and method parameters. The springdoc-openapi-maven-plugin plugin works with the spring-boot-maven plugin. Popular Tags. Sorry, your blog cannot share posts by email. When you want to fix a typo or make some changes to the documentation, you need to rebuild and redeploy your whole application. Create a Student.java entity class. ... RestController example with Spring Boot and Swagger. ", "Deletes a person from the system. Maybe you are using multiple versions of your API for backward compatibility but don't want to include the historical ones. We are adding a few swagger messages to configuration file(application.yml) and setting the application context path to /students. SwaggerConfiguration. The source code of final project built with all the features described in this blog post is available on GitHub. ", "Id of the person to be obtained. Prerequisites 1. Register the property file in your configuration on class level - eg.Â. It allows you to describe your API's properties using either JSON or YAML metadata. 404 if the person's identifier is not found. Swagger2 is an open source project used to generate the REST API documents for RESTful web services. This is where SpringFox comes into play. Fortunately, Spring provides a concept of Property placeholders. So for example in the model, they support it on method level (@ApiModelProperty), but not on class level (@ApiModel). Most importantly, whenever you make changes they'll be reflected in the documentation. We can set the name, value and other supported parameters. It is a nice way to decouple your documentation from your code and have a bit more flexibility. This is reflected in the swagger documentation as shown in the below image. Create a data.sql file under src/main/resources/ directory, to create the required Student table on the H2 database on application startup. Swagger tools perform the hard-work of keeping your API documentation up-to date. Get notifications about new posts on Twitter, RSS or Email. Either way, such inclusion based on URL matching can also be configured in the Docket. Both Controller and Model classes. For the tutorial, we will use the Springfox implementation of the Swagger 2 specification. Otherwise, you need to be really careful to update the Core Swagger annotations when making changes in your code. That means it can make sure your documentation is always up to date. What is swagger? Let’s go over to Swagger Editor and paste our YAML file into it. Summary. We will create a JPA RESTful CRUD service for the Student entity. In spring boot it works by simply adding this, no other dependencies needed: io.springfox springfox-boot-starter 3.0.0 The url is /swagger-ui/, mind the final slash. As we are going to create JPA CRUD operation to demonstrate this swagger integration example, we need to create required classes, interfaces and configuration. Version 3 is already out, … This is a field-level swagger configuration annotation. Create a class called SwaggerConfiguration.java and define the required beans. However, you may want to try an alternative before choosing it. It is a public interface, which other modules, applications or developers can use. We are going to perform CRUD operation using JPA. Git Installed in your pc 2. You can provide different property files in different environments. Also, we'll create a Spring Boot project, where we'll use generated classes. We'll use the Swagger PetstoreAPI example for everything. To be able to follow this tutorial you will need to have your REST API Spring Boot project created. Then you define the value of the placeholder in a .properties file. A bad one can only lead to unpopularity. starter for swagger2 License: Apache 2.0: Tags: spring api swagger starter: Used By: 19 artifacts: Central (6) Version Repository ... Spring Lib Release. Be careful though as this plagues your code with a lot of swagger specific annotations. Learn how to add Swagger to Spring Boot to generate automatic API documentationIn this Brain Byte, we'll understand what Swagger is and why it's needed. Swagger supports Model-level annotations, which we can see from the above Student.java class. The good news is that SpringFox can generate Swagger documentation based on such annotations, so you can utilize what you already have in your project without writing all the constraints manually! This annotation can be used to define the required API parameters of a particular API endpoint. Instead of annotation text insert a placeholder - e.g. We have added some basic setup like API packages, API info details, etc. Test driven REST API documentation as an alternative to traditional Swagger docs. 4.2. The next step is to set up the swagger by creating a swagger configuration class. We can use this to generate robust service documentation with very minimal configuration. Add the mentioned dependencies to the spring boot application’s pom.xml file. Create a website or blog at WordPress.com. , Web site: asbnotebook.com What's more, from that UI you can not only browse information about your API endpoint, but you can use the UI as a REST client - you can call any of your endpoints, specify the data to be sent and inspect the response. It is useful to provide important or required attributes first or group attributes which belong together. Cannot be empty. Spring REST Docs - Test driven documentation of your REST API, Exam Notes: Pivotal Certified Spring Web Application Developer. Swagger is a very popular service documentation tool. In the SpringFoxConfiguration file, we need to add ApiInfo object, which provides general information about the API such as title, version, contact or licensing information. While you can technically use one of your existing configuration files, it is better to have a separate file for it. Since we are extending the JpaRepository interface, we get all the required CRUD functionalities out of the box. Add the mentioned yml configuration details into application.yml(we can use application.properties file instead) file of the application. JSR 303: Bean Validation allows you to annotate fields of your Java classes to declare constraints and validation rules. 7.2 Swagger and Spring Security. I want to create document for my spring boot project.So I choose swagger api for that.I'm new to swagger. With version 2.0 many important features like extensibility have been added, there is a big community and many developers are using it by now. Swagger happily speaks both JSON and XML, with additional formats in the works. We can use this annotation to set the default value, datatype should be shown on the swagger document, etc. You can now see your generated documentation as HTML page. This will be exposed as part of the Swagger Documentation. Remember like we used .apis(RequestHandlerSelectors.any() to include all the classes? Version 3 is already out, but it is not yet (as of 2/2018) supported by SpringFox. ", "Age of the person. What's cool is that you can provide multiple property files for each language one. Person Class annotated with these annotations can look something like this. Just go to the Swagger Online Editor and paste the JSON there. On the class level, you use @ApiModel annotation and on field level @ApiModelProperty. It can also utilize core swagger classes such as @ApiModelProperty. Since we are creating documentation for REST endpoints, we need to create a Restful controller layer and configure them with swagger annotations. This will add the required swagger java libraries into our application’s classpath. We also learned how to use Swagger UI to test the endpoints. We have used @EnableSwagger2 annotation to enable swagger documentation in our application. Then, we select Generate Server from the menu and pick what kind of a server we’d like to generate (I went with “Spring”). Sometimes you also need to include only specific URL paths. ", "Returns a specific person by their identifier. The Swagger UI is a beautiful thing to view our API. To enable it is a Spring Boot app, you just need to add this dependency: The documentation will be automatically available here: By default, the header part of our documentation does look pretty generic: It's time to do something about it. This increases the risk of your docs being out of sync and thus not trustworthy. We can change all the information there just by a simple configuration change. The one who is creating the API is usually not the one who is consuming it. It is however not realistic to write such documentation by hand and keep it updated whenever your code changes. Swagger 2 in Spring Boot Swagger 2 is an open-source project used to describe and document RESTful APIs. But you can already verify it works. If you do not have one, here is… Notes @Configuration - This file contains Spring configuration. We learned about different API operation-level and API model-level annotations. Here, we have used a few of the swagger configuration annotations. Required dependencies mentioned below, SpringFox supports this mechanism in some of the annotations. To change basePath from default is sufficient to provide following property in Spring Boot property source: springfox.documentation.swagger.v2.path=/apidoc Create a StudentRepository.java interface as shown below. The next step is to add the Maven dependencies for swagger and swagger-ui libraries. @EnableSwagger2WebMvc - Annotation to Enable Swagger Documentation on the API; public static final Contact DEFAULT_CONTACT - Has the contact information of the API. The docket is a builder pattern provided in the springfox framework that creates an interface between swagger and spring framework. While creating Swagger documentation, we often need to hide endpoints from being exposed to end-users. ", "Unique identifier of the person. It is a Swagger integration for Spring Framework. Remove a param without updating your docs and your tests fail. Run the spring boot application. So why is this a bad idea? This is very useful when we need to share our APIs with others for integration. 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To narrow down classes which will SpringFox detect as sources for documentation.! Some more complicated constraints you need to include just the essential information which is not.... Details into application.yml ( we can use this API like Postman to the! Injects it instead of any, which we can see from the properties and injects it instead of hardcoded. From being exposed to end-users database on application startup traditional Swagger docs: bean Validation allows to.