spring boot running server information server port and server name

Published: 14 May 2024
on channel: CodeWis Technologies by Nuhman Paramban

Finding Server Info in Spring Boot server port and name

Spring Boot offers several ways to access the server's name and port within your application code. The best approach depends on how the server is configured - fixed or dynamic port and your use case - production or testing.

Approaches:

Environment Object:

Use the @Autowired annotation to inject the Environment interface.
Retrieve server name and port using properties like server.address and server.port.

ServerProperties Class:

Autowire the ServerProperties object.
Access properties like address and port directly.

@Value Annotation - Limited Use:

Caution: Only use this for fixed ports defined in properties files. Not recommended for dynamic ports.
Annotate a field with @Value("$server.port") to get the port value.

ApplicationListener - Advanced:

For applications with random ports, use the ApplicationListener ServletWebServerInitializedEvent interface.
Implement the interface and retrieve server information from the event object.

@LocalServerPort for Tests Testing Only:

In Spring Boot tests with @SpringBootTest webEnvironment=RANDOM_PORT, use @LocalServerPort to inject the actual port during testing.

Choosing the Right Method:

Fixed vs Dynamic Port:
Use Environment or ServerProperties for fixed ports.
Use ApplicationListener for dynamic ports.

Production vs Testing:
Use Environment, ServerProperties, or ApplicationListener for production code.
Use @LocalServerPort only for testing purposes.

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