Baeldung Pro comes with both absolutely No-Ads as well as finally with Dark Mode, for a clean learning experience:
Once the early-adopter seats are all used, the price will go up and stay at $33/year.
Azure Container Apps is a fully managed serverless container service that enables you to build and deploy modern, cloud-native Java applications and microservices at scale. It offers a simplified developer experience while providing the flexibility and portability of containers.
Of course, Azure Container Apps has really solid support for our ecosystem, from a number of build options, managed Java components, native metrics, dynamic logger, and quite a bit more.
To learn more about Java features on Azure Container Apps, visit the documentation page.
You can also ask questions and leave feedback on the Azure Container Apps GitHub page.
Azure Container Apps is a fully managed serverless container service that enables you to build and deploy modern, cloud-native Java applications and microservices at scale. It offers a simplified developer experience while providing the flexibility and portability of containers.
Of course, Azure Container Apps has really solid support for our ecosystem, from a number of build options, managed Java components, native metrics, dynamic logger, and quite a bit more.
To learn more about Java features on Azure Container Apps, you can get started over on the documentation page.
And, you can also ask questions and leave feedback on the Azure Container Apps GitHub page.
Modern software architecture is often broken. Slow delivery leads to missed opportunities, innovation is stalled due to architectural complexities, and engineering resources are exceedingly expensive.
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Try a 14-Day Free Trial of Orkes Conductor today.
Modern software architecture is often broken. Slow delivery leads to missed opportunities, innovation is stalled due to architectural complexities, and engineering resources are exceedingly expensive.
Orkes is the leading workflow orchestration platform built to enable teams to transform the way they develop, connect, and deploy applications, microservices, AI agents, and more.
With Orkes Conductor managed through Orkes Cloud, developers can focus on building mission critical applications without worrying about infrastructure maintenance to meet goals and, simply put, taking new products live faster and reducing total cost of ownership.
Try a 14-Day Free Trial of Orkes Conductor today.
Mocking is an essential part of unit testing, and the Mockito library makes it easy to write clean and intuitive unit tests for your Java code.
Get started with mocking and improve your application tests using our Mockito guide:
Handling concurrency in an application can be a tricky process with many potential pitfalls. A solid grasp of the fundamentals will go a long way to help minimize these issues.
Get started with understanding multi-threaded applications with our Java Concurrency guide:
Spring 5 added support for reactive programming with the Spring WebFlux module, which has been improved upon ever since. Get started with the Reactor project basics and reactive programming in Spring Boot:
Since its introduction in Java 8, the Stream API has become a staple of Java development. The basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use.
But these can also be overused and fall into some common pitfalls.
To get a better understanding on how Streams work and how to combine them with other language features, check out our guide to Java Streams:
Explore Spring Boot 3 and Spring 6 in-depth through building a full REST API with the framework:
Yes, Spring Security can be complex, from the more advanced functionality within the Core to the deep OAuth support in the framework.
I built the security material as two full courses - Core and OAuth, to get practical with these more complex scenarios. We explore when and how to use each feature and code through it on the backing project.
You can explore the course here:
All Access is finally out, with all of my Spring courses. Learn JUnit is out as well, and Learn Maven is coming fast. And, of course, quite a bit more affordable. Finally.
>> GET THE COURSE
Spring Data JPA is a great way to handle the complexity of JPA with the powerful simplicity of Spring Boot.
Get started with Spring Data JPA through the guided reference course:
End-to-end testing is a very useful method to make sure that your application works as intended. This highlights issues in the overall functionality of the software, that the unit and integration test stages may miss.
Playwright is an easy-to-use, but powerful tool that automates end-to-end testing, and supports all modern browsers and platforms.
When coupled with LambdaTest (an AI-powered cloud-based test execution platform) it can be further scaled to run the Playwright scripts in parallel across 3000+ browser and device combinations:
Yes, we're now running our Spring Sale. All Courses are 25% off until 26th May, 2025:
Yes, we're now running our Spring Sale. All Courses are 25% off until 26th May, 2025:
1. Overview
When working with a REST API, it’s common to retrieve all of the REST endpoints. For example, we might need to save all request mapping endpoints in a database. In this tutorial, we’ll look at how to get all the REST endpoints in a Spring Boot application.
2. Mapping Endpoints
In a Spring Boot application, we expose a REST API endpoint by using the @RequestMapping annotation in the controller class. For getting these endpoints, there are three options: an event listener, Spring Boot Actuator, or the SpringDoc library.
3. Event Listener Approach
For creating a REST API service, we use @RestController and @RequestMapping in the controller class. These classes register in the spring application context as a spring bean. Therefore, we can get the endpoints by using the event listener when the application context is ready at startup. There are two ways to define a listener. We can either implement the ApplicationListener interface or use the @EventListener annotation.
3.1. ApplicationListener Interface
When implementing the ApplicationListener, we must define the onApplicationEvent() method:
@Override
public void onApplicationEvent(ContextRefreshedEvent event) {
ApplicationContext applicationContext = event.getApplicationContext();
RequestMappingHandlerMapping requestMappingHandlerMapping = applicationContext
.getBean("requestMappingHandlerMapping", RequestMappingHandlerMapping.class);
Map<RequestMappingInfo, HandlerMethod> map = requestMappingHandlerMapping
.getHandlerMethods();
map.forEach((key, value) -> LOGGER.info("{} {}", key, value));
}In this way, we use the ContextRefreshedEvent class. This event is published when the ApplicationContext is either initialized or refreshed. Spring Boot provides many HandlerMapping implementations. Among these is the RequestMappingHandlerMapping class, which detects request mappings and is used by the @RequestMapping annotation. Therefore, we use this bean in the ContextRefreshedEvent event.
3.2. @EventListener Annotation
The other way to map our endpoints is to use the @EventListener annotation. We use this annotation directly on the method that handles the ContextRefreshedEvent:
@EventListener
public void handleContextRefresh(ContextRefreshedEvent event) {
ApplicationContext applicationContext = event.getApplicationContext();
RequestMappingHandlerMapping requestMappingHandlerMapping = applicationContext
.getBean("requestMappingHandlerMapping", RequestMappingHandlerMapping.class);
Map<RequestMappingInfo, HandlerMethod> map = requestMappingHandlerMapping
.getHandlerMethods();
map.forEach((key, value) -> LOGGER.info("{} {}", key, value));
}4. Actuator Approach
A second approach for retrieving a list of all our endpoints is via the Spring Boot Actuator feature.
4.1. Maven Dependency
For enabling this feature, we’ll add the spring-boot-actuator Maven dependency to our pom.xml file:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>4.2. Configuration
Only /health and /info endpoints are available by default when we add the spring-boot-actuator dependency. To enable all the actuator endpoints, we can expose them by adding a property to our application.properties file:
management.endpoints.web.exposure.include=*Or, we can simply expose the endpoint for retrieving the mappings:
management.endpoints.web.exposure.include=mappingsOnce enabled, the REST API endpoints of our application are available at http://host/actuator/mappings.
5. SpringDoc
The SpringDoc library can also be used to list all endpoints of a REST API.
5.1. Maven Dependency
To add it to our project, we need a springdoc-openapi-ui dependency in the pom.xml file:
<dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-ui</artifactId>
<version>1.7.0</version>
</dependency>5.2. Configuration
Let’s create the configuration class by defining the OpenAPI bean:
@Bean
public OpenAPI openAPI() {
return new OpenAPI().info(new Info().title("SpringDoc example")
.description("SpringDoc application")
.version("v0.0.1"));
}To access the REST API endpoints, we can visit this URL in our browser:
http://localhost:8080/swagger-ui/index.html6. Conclusion
In this article, we describe how to retrieve request mapping endpoints in a Spring Boot application by using the Event listener, Spring Boot Actuator, and SpringDoc library.
The code backing this article is available on GitHub. Once you're logged in as a Baeldung Pro Member, start learning and coding on the project.
