Swagger v3 annotations example

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Micronaut will at compile time produce a Swagger 3. You can customize the generated Swagger using the standard Swagger Annotations. For example:. If you have already created a Micronaut project and will like to add Swagger support, you can simply follow instructions in subsequent sections. Once dependencies have been configured a minimum requirement is to add a OpenAPIDefinition annotation to your Application class:.

In the following chapters you will see it is possible to tweaks the open api processing via system properties. It is also possible to specify these options in a file located at the root level of your project directory. The expected filename is openapi. It is possible to specify a different location and filename with the micronaut.

Options specified with System properties have priority over the one defined in the openapi. Properties prefixed with micronaut. Micronaut can generate views for your generated OpenApi specification. Currently Swagger-uiRedoc and RapiDoc are supported. By default the generation of views is disabled.

Get started with NSwag and ASP.NET Core

To turn it on you have to set the following system property micronaut. The string syntax is a series of comma-separated key-value pairs, to enable and configure the views. Default is swagger. Default is to use the latest available. See Redoc Options for a description. See RapiDoc Options for a description. See Swagger UI Configuration for a description. These are case insensitive. See Swagger UI Themes.This feature can be configured programmatically in Java or using Spring or Blueprint beans.

For older releases, as well as for the users of older Swagger specifications 1. The following optional parameters can be configured in OpenApiFeature.

Note that although there are some similarities with Swagger specifications 1. It is possible to supply the configuration from the property files. OpenApiFeature will pick it up if it is available, and the location can be overridden with a 'propertiesLocation ' property.

Additionally, the complete OpenAPI configuration could be supplied from the property file usually openapi-configuration. Please take into account that there is a certain level of the overlap between both. Instead they complement and serve as the default configuration properties: for example, if some properties have been set from the code then the values for the same properties found in the properties file will not be used.

Since org. The dedicated Activator will take care of discovering the presence of the org. The way it is implemented is by passing those parameters as a query string so the Swagger UI could adjust itself. Luckily, starting from 2.

Generating Swagger example requests with Swashbuckle

To activate it from OpenApiFeatureit is enough to set useContextBasedConfig property to true very likely you would also want to set scan to false.

Do we have an example that works for tomcat based Application. I used the above example and modified my web. Do we have a full example somewhere that works on tomcat and not just on Springboot or Jetty? We don't have such an example right but the documentation should have covered this particular deployment as well, working on that, the update should be available shortly.

Thank you! That would be great.Building a back-end API layer introduces a whole new area of challenges that goes beyond implementing just endpoints. You now have clients which will now be using your API. Your clients will need to know how to interact with your API. Thus your API documentation becomes more critical. However, the best practices on how you document your API, its structure, what to include and what not, are altogether a different subject.

For best practices on documentation, I suggest going through this presentation by Andy Wikinson. It is language-agnostic and is extensible into new technologies and protocols beyond HTTP. Springfox supports both Swagger 1. Our application implements a set of REST endpoints to manage products.

The service layer is composed of a ProductService interface and a ProductServiceImpl implementation class. The code of ProductController is this. In this controller, the RestController annotation introduced in Spring 4. Under the hood, RestController works as a convenient annotation to annotate the class with the Controller and ResponseBody. The method-level RequestMapping annotations maps web requests to the handler methods of the controller. For our application, we will create a Docket bean in a Spring Boot configuration to configure Swagger 2 for the application.

A Springfox Docket instance provides the primary API configuration with sensible defaults and convenience methods for configuration. Our Spring Boot configuration class, SwaggerConfig is this. In this configuration class, the EnableSwagger2 annotation enables Swagger support in the class.

The select method called on the Docket bean instance returns an ApiSelectorBuilderwhich provides the apis and paths methods to filter the controllers and methods being documented using String predicates.

In the code, the RequestHandlerSelectors. What we want is some nice human readable structured documentation, and this is where Swagger UI takes over. As you can see, Swagger 2 used sensible defaults to generate documentation from our ProductController. This was all done automatically. We did not write any code or other documentation to support Swagger. Line 23 initialises the Docket with the new information. The Swagger 2 generated documentation, now look similar to this.

At this point, if you click the product-controller link, Swagger-UI will display the documentation of our operation endpoints, like this. For each of our operation endpoint, we can use the ApiOperation annotation to describe the endpoint and its response type, like this:.

Swagger 2 also allows overriding the default response messages of HTTP methods. One undocumented thing that took quite some of my time was related to the value of Response Content Type. The annotated ProductController is this. The output of the operation endpoints on the browser is this. If you have noticed, the current documentation is missing one thing — documentation of the Product JPA entity. We will generate documentation for our model next. You can use the ApiModelProperty annotation to describe the properties of the Product model.

With ApiModelPropertyyou can also document a property as required. The code of our Product class is this.The real power of the Swagger standard comes from the ecosystem of powerful tools that surrounds it. But why not use another standard like RAML or simply open your favorite word processor and start hitting the keys?

To start writing a Swagger spec, you simply open the online Swagger Editor and start writing according to the Swagger specification. You can see a screenshot of the Swagger Editor below.

You write your spec in the left-hand side, and you can see the resulting documentation in the right-hand side:. The first thing that you will notice is that Swagger is written in YAMLwhich is a format that is very easy to read — even for non-technical people. I have only included PUT below, but you can see the rest in my Swagger file. Below paths you define a path e. PUT that the path can be used with. Given that the movie resource representation is used in almost all methods, it makes sense to write the resource definition in a single place and reuse it across the methods.

Below definitions you define a resource type i. Movie and then you define its properties below:. For this purpose you can use Swagger UIwhich converts your Swagger spec into a beautiful, interactive API documentation you can see an online example here. You can download Swagger UI from here. Once you have downloaded it, you put your swagger. Then you can open index.

swagger v3 annotations example

Now you have learned all the basic elements of Swagger. Why use Swagger? It also means that the API user has probably already experience with Swagger, which dramatically reduces the learning curve.

So most of the complicated things, like security or reusing resource definitions across several methods, are already handled gracefully by the standard. Beautiful Documentation: The customer-facing documentation looks really nice.

swagger v3 annotations example

Auto-generate Code: You can auto-generate client and server code interface part based on the Swagger spec, which makes sure that they are consistent.X produces OpenApi 3.

If you're looking for swagger 1. X and OpenApi 2. In order to generate the OpenAPI documentation, swagger-core offers a set of annotations to declare and manipulate the output. A user is not required to be familiar with the full aspects of the OpenAPI Specification in order to use it, but as a reference it may answer a few questions regarding the generated output.

The documentation for each annotation is meant as an overview of its usage. Each annotation also has links to its javadocs both on the header and at the end of the overview. For your convenience, the javadocs and petstore sample are available as well. GET is required at method level. This behaviour is controlled by configuration property readAllResources which defaults to true.

By setting this flag to false only Operation annotated methods are considered. It corresponds to the OpenAPI object in the specification, and allows to define info, tags, externalDocs, security requirements and servers.

See the javadoc for a complete list of supported properties. The Info annotation may be used in io. It corresponds to the Info object in the specification. The Contact annotation adds contact properties to the Info section of an OpenAPI definition - corresponding to the Contact object in the specification, as in the example below:.

See the javadoc for a list of supported properties. The License annotation adds license properties to the Info section of an OpenAPI definition - corresponding to the License object in the specification. As in the example above:. The following fields can also alternatively be defined at method level as repeatable annotations in case of arraysin this case method level annotations take precedence over Operation annotation fields see related section :.

The summary of the annotation is a short description on the API. Since this is displayed in the list of operations in Swagger-UI and the location is limited in size, this should be kept short preferably shorter than characters. The description allows you to give significantly more details about the operations.

Notice that the actual method declaration returns a Response but that is a general-purpose JAX-RS class and not the actual response sent to the user. If the returned object is the actual result, it can be used directly instead of declaring it in the annotation. Keep in mind that Java has type erasure, so using generics in the return type may not be parsed properly, and the responses should be used directly.

Security related annotation is detailed in section SecurityRequirement below. For further details about this annotation, check out the javadocs and usage examples in tests. It can also be used independently in Operation. Parameter can be also used together with FormDataParam in multipart scenarios to resolve the operation request body see also the specfor example:. For further method parameters bound to the request body, see RequestBody below.

Multiple Parameter annotations can also be used in parameters field of Operation annotation or as direct annotation s at method level; this can be handy in various scenarios, for example:.

When defining parameters in parameters field of Operation annotation or at method level, it's important to set name and in for OpenAPIS's definitions to be proper. It can also be used at method level or as field of Operation requestBodyin which case it will not be bound to the specific parameter.

swagger v3 annotations example

In case of multiple such parameters, only the first is considered. The RequestBody might be affected by the Consumes annotation: for every media type defined there will be an associated mediaType in the RequestBody content. For further details about this annotation, usage and edge cases, check out the javadocs and usage examples in specific test class and other tests.

The annotation may be used at method level or as field of Operation to define one or more responses of the Operation. The Produces annotation can affect the contents of this annotation; Produces response media types are added to the content of operation responses:.

For further details about this annotation, usage and edge cases, check out the javadocs ApiResponse and usage examples in specific test class and other tests.As a result, everybody is documenting their APIs in their own way, resulting a gap in common structure which all can easily follow, understand and use.

We need to have a common pattern and tool. Swagger backed by companies like Google, IBM, Microsoft does this same job of filling the gap of common documentation style. It offers both human readable and machine readable format of documentation.

JSON can be used as machine readable format and Swagger-UI is for visual display which is easy for humans to understand by just browsing the api documentation. We will use the Spring boot style of exposing rest API for faster development time. Unzip and import the project into Eclipse as existing maven project.

In this step, all necessary dependencies will be downloaded from maven repository. Perform a fresh mvn clean install at this step so that all spring-boot related artifacts got downloaded properly.

Documenting Your RESTful API with Swagger - Spring Boot Application

Open application. Open pom. Add the below configuration in the code base. To help you understand the configuration, I have added inline comments. Do maven build and Start the server. This is not that much easy to read and understand, actually Swagger has provided this to be used in other systems like API management tools now a days popular, which provides the functionality like API gateways, API caching, API documentation etc.

Swagger2 UI Docs without Annotations. Swagger has provided few annotations to add this detailed information to the APIs. Here we can add tags to methods to add some grouping in the swagger-ui.

ApiModelProperty — This annotation is used in the Model property to add some description to the Swagger output for that model attribute. Drop me your questions in comments section. One problem I ran in to was the project I downloaded now comes using Spring Boot 2. Beginning in Spring Boot 2. Is it possible to get the YAML format too? Spring Boot 1. Verified Tomcat is running. Had to remove server.

Found the issue—the Spring Boot application was in a different package from the RestController so it was not finding the RestController and its methods. This is amazing article. I like the style of writing.This is a follow on from my post from last year about Generating example Swagger responses.

Examples which contains the functionality I previously described in this blog post. The code lives on GitHub. I have also created a. Filterswhich is also on GitHub. First, install my Swashbuckle. Examples NuGet package, or the. NET Core version Swashbuckle. Now implement it, in this case via a DeliveryOptionsSearchModelExample which should implement IExamplesProviderwhich will generate the example data. It should return the type you specified when you specified the [SwaggerRequestExample].

I find that having a valid request on hand is useful for smoke testing your API endpoints are working correctly. GetControllerAndActionAttributes. The endpoint accepts a parameter of type Vehicle, which is an abstract class with shared vehicle properties and a VehicleType enumeration property enumeration values of Car, Truck.

swagger v3 annotations example

The Swashbuckle documentation shows the Vehicle schema as my input parameter, but I would like to replace it with examples of the various concrete Vehicles that can be passed in. Any idea on whether it is possible to do what I want to do, or if there is a better solution for my problem?

Did you try that? Matt, thanks for your response. Using typeof of my concrete class in the attribute declaration does not work because my concrete class does not implement IExampleProvider.

The issue is in the schema replacement. Thanks, Are you able to update example to latest version 6. Could you please help me out in implementing default request data to the controller action of the model schema on the Swagger UI with Swagger 6.

If you need support you could try posting an issue on the Swashbuckle github. SerializeObject provider. GetExamplesFormatting. GetOrRegister attr. ResponseType. CreateInstance attr.

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