Spring Boot 2.7.9 Documentation

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springdocopenapi java library helps to automate the generation of API documentation using spring boot projects.springdoc-openapi works by examining an application at runtime to infer API semantics based on spring configurations, class structure and various annotations.

The library uses spring-boot application auto-configured packages to scan for the following annotations in spring beans: OpenAPIDefinition and Info.These annotations declare, API Information: Title, version, licence, security, servers, tags, security and externalDocs.For better performance of documentation generation, declare @OpenAPIDefinition and @SecurityScheme annotations within a spring managed bean.

@RouterOperation, can reference directly a spring Bean (beanClass property) and the underlying method (beanMethod property): Springdoc-openapi, will then inspect this method and the swagger annotations on this method level.

All the documentations filled using @RouterOperation, might be completed by the router function data.For that, @RouterOperation fields must help identify uniquely the concerned route.springdoc-openpi scans for a unique route related to a @RouterOperation annotation, using on the following criteria:

The aim of springdoc-openapi-maven-plugin is to generate json and yaml OpenAPI description during build time.The plugin works during integration-tests phase, and generate the OpenAPI description.The plugin works in conjunction with spring-boot-maven plugin.

All the modules have been renamed.springdoc-openapi-starter-common integrates many spring modules support in order to hide the maximum of complexity.It allows the support out of the box for Actuator / Spring Cloud Function / Spring Data Rest/ Spring Native/ Spring Hateoas / Spring Securtiy / Kotlin/ Javadoc.

Replace swagger 2 annotations with swagger 3 annotations (it is already included with springdoc-openapi-starter-webmvc-ui dependency).Package for swagger 3 annotations is io.swagger.v3.oas.annotations.

You can define your own groups of API based on the combination of: API paths and packages to scan. Each group should have a unique groupName.The OpenAPI description of this group, will be available by default on:

RFC7239 "Forwarded Headers" defines the Forwarded HTTP header; proxies can use this header to provide information about the original request. You can configure your application to read those headers and automatically use that information when creating links and sending them to clients in HTTP 302 responses, JSON documents or HTML pages. There are also non-standard headers, like X-Forwarded-Host, X-Forwarded-Port, X-Forwarded-Proto, X-Forwarded-Ssl, and X-Forwarded-Prefix.

If the proxy adds the commonly used X-Forwarded-For and X-Forwarded-Proto headers, setting server.forward-headers-strategy to NATIVE is enough to support those. With this option, the Web servers themselves natively support this feature; you can check their specific documentation to learn about specific behavior.

OAS 3 was released in July 2017, and there was no release of springfox to support OAS 3.springfox covers for the moment only swagger 2 integration with Spring Boot. The latest release date is June 2018. So, in terms of maintenance there is a big lack of support lately.

You can Define your own OpenAPI Bean: If you need the definitions to appear globally (within every group), no matter if the group fulfills the conditions specified on the GroupedOpenApi , you can use OpenAPI Bean.

If your file open-api.json, contains the OpenAPI documentation in OpenAPI 3 format.Then simply declare: The file name can be anything you want, from the moment your declaration is consistent yaml or json OpenAPI Spec.

The whole idea of springdoc-openapi is to get your documentation the closest to the code, with minimal code changes.If the code contains @Deprecated, sprindoc-openapi will consider its schema as Deprecated as well.If you want to declare a field on swagger as non deprecated, even with the java code, the field contains @Depreacted,You can use the following property that is available since release v1.4.3:

The issue is caused by the changes introduced by Spring-Boot 3.2.0in particular for the Parameter Name Discovery.This can be fixed by adding the -parameters arg to the Maven Compiler Plugin.

Camel support for Spring Boot provides auto-configuration of the Camel and starters for many Camel components. The opinionated auto-configuration of the Camel context auto-detects Camel routes available in the Spring context and registers the key Camel utilities (such as producer template, consumer template and the type converter) as beans.

The curated camel-spring-boot-dependencies BOM, which is generated, contains the adjusted JARs that both Spring Boot and Apache Camel use to avoid any conflicts. This BOM is used to test camel-spring-boot itself.

Spring Boot users may choose to use pure Camel dependencies by using the camel-spring-boot-bom that only has the Camel starter JARs as managed dependencies. However, this may lead to a classpath conflict if a third-party JAR from Spring Boot is not compatible with a particular Camel component.

Each starter lists configuration parameters you can configure in the standard application.properties or application.yml files. These parameters have the form of camel.component.[component-name].[parameter]. For example to configure the URL of the ActiveMQ broker you can set:

Spring Boot automatically configures Camel for you. The opinionated auto-configuration of the Camel context auto-detects Camel routes available in the Spring context and registers the key Camel utilities (like producer template, consumer template and the type converter) as beans.

The most important piece of functionality provided by the Camel auto-configuration is the CamelContext instance. Camel auto-configuration creates a SpringCamelContext for you and takes care of the proper initialization and shutdown of that context. The created Camel context is also registered in the Spring application context (under the camelContext bean name), so you can access it like any other Spring bean.

Camel auto-configuration collects all the RouteBuilder instances from the Spring context and automatically injects them into the provided CamelContext. This means that creating new Camel routes with the Spring Boot starter is as simple as adding the @Component annotated class to your classpath:

Spring Boot auto-configuration automatically connects to Spring Boot external configuration (which may contain properties placeholders, OS environment variables or system properties) with the Camel properties support. It basically means that any property defined in application.properties file:

The method beforeApplicationStart will be called just before the Spring context is started, so the CamelContext instance passed to this callback is fully auto-configured. If you add multiple instances of CamelContextConfiguration into your Spring context, each instance is executed.

Spring comes with the powerful type conversion API. The Spring API is similar to the Camel type converter API. As both APIs are so similar, Camel Spring Boot automatically registers a bridge converter (SpringTypeConverter) that delegates to the Spring conversion API. This means that out-of-the-box Camel will treat Spring Converters like Camel ones. With this approach you can use both Camel and Spring converters accessed via Camel TypeConverter API:

Camel applications which have this feature enabled launch a new thread on startup for the sole purpose of keeping the application alive by preventing JVM termination. This means that after you start a Camel application with Spring Boot, your application waits for a Ctrl+C signal and does not exit immediately.

By default, you can put Camel XML routes in the classpath under the directory camel, which camel-spring-boot will auto-detect and include. You can configure the directory name or turn this off using the configuration option:

Typical Camel Spring Boot projects will use a combination of external configuration and Beans to configure an application. For more examples on how to configure your Camel Spring Boot project, please see the example repository.

Spring Boot is an application framework which, according to its website, makes it easy to create stand-alone, production-grade Spring based Applications that you can "just run". It takes an opinionated view of the Spring platform and third-party libraries so you can get started with minimum fuss. Most Spring Boot applications need very little Spring configuration.

Any BPMN 2.0 process definitions in the processes folder will be automatically deployed. Create a folder processes and add a dummy process definition (named one-task-process.bpmn20.xml) to this folder. The content of this file is shown below.

As stated above, Spring Boot is about convention over configuration. By default, by having only H2 on the classpath, it created an in-memory datasource and passed that to the Flowable process engine configuration.

Create a new class, a Spring service and create two methods: one to start our process and one to get a task list for a given assignee. We simply wrap Flowable calls here, but in real-life scenarios this will be more complex.

Both the @Service and the @RestController will be found by the automatic component scan for a Spring Boot application.Run the application class again. We can now interact with the REST API, for example, by using cURL:

This is a Spring repository, which offers CRUD out of the box. We add the method to find a Person by username. Spring will automatically implement this based on conventions (typically, the property names used).

by adding @Transactional to the class. Note that by adding the JPA dependency above, the DataSourceTransactionManager which we were using before is now automatically swapped out by a JpaTransactionManager.

Flowable provides a Spring Boot Actuator Endpoint that exposes information for the Processes that are running.By default, the flowable endpoint is mapped to /actuator/flowable.Spring Boot by default only exposes a few endpoints to the web (e.g.: In spring-boot-starter-actuator:2.5.4 , Spring Boot by default only exposes the health endpoint to the web. For more information about the endpoints exposed to the web by default, see -boot/docs/current/reference/html/actuator.html#actuator.endpoints.exposing ). In order to use the flowable endpoint through the web, you need to add management.endpoints.web.exposure.include=flowable to your application.properties (Note: The org.flowable.spring.boot.EndpointAutoConfiguration class does not use the @ConditionalOnAvailableEndpoint annotation to check whether the flowable endpoint is both enabled and exposed like the HealthEndpointAutoConfiguration class. So the only thing you need to do to use the flowable endpoint through the web is to add management.endpoints.web.exposure.include=flowable or management.endpoints.web.exposure.include=* to your configuration file.).

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