#SpringBoot4

Spring Boot 4 unlocks a whole chapter on distributed SQL. Jakarta EE alignment, null safety, resilience annotations, and more got this author excited. #SpringBoot4 #Java #CockroachDB

🚀 Spring Boot 4: Dedicated RestClient starter. ✅ spring-boot-starter-restclient for imperative HTTP ✅ WebClient → spring-boot-starter-webclient ✅ Unified spring.http.clients.* settings #SpringBoot4 #RestClient

🚀 Spring Boot 4 tip: Jackson 3 brings JsonMapper as the preferred way to read JSON! Notice the new import. No more ObjectMapper from com.fasterxml! JsonMapper is now your go-to for JSON operations in modern Spring apps. #SpringBoot4 #Jackson3 #Java

💡 Spring Boot 4: Stack multiple TaskDecorators for async work. ✅ Each one can copy context to the worker thread ✅ Spring Boot combines and orders them with @Order ✅ Typical pair: MDC (logs) + security (user) #SpringBoot4 #Async

🚀 Spring Boot 4: Disable console logging with one property. ✅ logging.console.enabled=false ✅ Useful in containers that only scrape files/OTLP ✅ Keep file or remote appenders as needed #SpringBoot4 #Logging

🚀 Spring Boot 4: Test starters follow spring-boot-starter-*-test. ✅ Each tech has a matching test starter ✅ They pull spring-boot-starter-test transitively ✅ Example: Security tests need …-security-test #SpringBoot4 #Testing

🚀 Spring Boot 4: Native API versioning ✅ Configure with spring.mvc.apiversion.* ✅ Version by header, path, or media type ✅ Plug in ApiVersionResolver for custom rules #SpringBoot4 #ApiVersioning 🧵

🚀 Spring Boot 4: Flyway/Liquibase now need their starters. ✅ Third-party jar alone is not enough ✅ Use spring-boot-starter-flyway / liquibase ✅ Matching *-test starters for test slices #SpringBoot4 #Flyway

🚀 Spring Boot 4: Prefer RestTestClient over TestRestTemplate. ✅ Fluent API aligned with RestClient ✅ Works with MockMvc or a real port ✅ Add @AutoConfigureRestTestClient when needed #SpringBoot4 #RestTestClient

💡 Spring Boot 4: Turn on virtual threads. Waiting on HTTP gets cheaper. ✅ Set spring.threads.virtual.enabled=true ✅ Keep your normal RestClient code ✅ More API calls waiting at once, fewer heavy OS threads #SpringBoot4 #VirtualThreads

💡 Spring Boot 4: The “turn tracing on” property moved. ✅ management.tracing.enabled becomes management.tracing.export.enabled ✅ @ConditionalOnEnabledTracing becomes @ConditionalOnEnabledTracingExport #SpringBoot4 #Observability

🚀 Spring Boot 4: Kotlin Serialization gets a first-class starter. ✅ spring-boot-starter-kotlinx-serialization-json ✅ Contributes a Json bean + HTTP converter ✅ Configure via spring.kotlinx.serialization.json.* #SpringBoot4 #Kotlin

🚀 Spring Boot 4: MongoDB health no longer needs Spring Data. ✅ Indicators live in spring-boot-mongodb ✅ Works with the MongoDB driver alone ✅ Use spring-boot-starter-mongodb when you need health #SpringBoot4 #MongoDB

🚀 Spring Boot 4: spring-boot-starter-web becomes spring-boot-starter-webmvc. ✅ Name matches the stack (MVC vs WebFlux) ✅ Pair with spring-boot-starter-webmvc-test #SpringBoot4 #WebMVC

🚀 Spring Boot 4: No more @MockBean, use @MockitoBean. ✅ Field mocks as usual: @MockitoBean / @MockitoSpyBean ✅ But not for @Configuration classes anymore. Prefer @Import test configs for shared mocks #SpringBoot4 #Testing

Spring Framework 7 introduces the Bean Registrar interface for programmatic bean registration. Finally, a clean way to register beans dynamically based on environment properties or complex logic! #SpringFramework #Java #SpringBoot4

Spring Boot Tip 💡🍃 You can enable the built-in Spring API versioning feature with a single configuration property. See how 👇 #springboot4 #restapi #apiversioning #springmvc

🚀 Spring Boot 4: Redis static master/replica (Lettuce). ✅ Set ✅ Reads can go to replicas ✅ Lettuce-only, not Jedis #SpringBoot4 #Redis

🚀 Ya está disponible mi webinar sobre Spring Boot 4 y Spring Framework 7. 🎥 Webinar: 💻 Código fuente: Si trabajas con Java, este contenido te prepara para la nueva generación de Spring. 🌱🔥 #Java #SpringBoot4 #Spring7 #AOT #SpringAI

🚀 Spring Boot 4: @ConfigurationPropertiesSource for external types. ✅ Metadata for types living in another module #SpringBoot4 #Config