Fix org.hibernate.query.sqm.internal.SqmUtil$NotYetImplementedException in Spring Boot JPA native queries. Covers interface projections, @SqlResultSetMapping, and JPQL constructor expressions with annotated code examples.
Master Angular services and dependency injection: creating services with @Injectable, providedIn scope options, inject() function, InjectionToken, component-level providers, and unit testing with mock services.
Compare Maven Shade Plugin fat JARs, Spring Boot executable JARs, and jpackage native installers — with full Maven configurations, build commands, a side-by-side comparison table, and pitfall guide.
Learn how to create Spring beans using static factory methods with @Bean configuration and XML. Covers third-party class registration, profile-based implementations, construction-time validation, and JUnit testing.
Go beyond string and number with TypeScript literal types: literal unions, const assertions, discriminated unions, and template literal types — with practical examples showing why literal types eliminate an entire class of runtime bugs.
Prepare for your Java interview with the top 40 Spring MVC interview questions and answers covering DispatcherServlet, annotations, REST, validation, exception handling, and more — from beginner to advanced.
A complete guide to consuming REST APIs with the Jersey Client API: GET, POST, PUT, DELETE requests, JSON handling, query parameters, headers, authentication, and error handling — with annotated Java code and sample output.
Spring Framework 7 now ships @Retryable and @ConcurrencyLimit in core. Here's what's still Resilience4j's job on Boot 4.1 -- circuit breaker, rate limiter, bounded-wait bulkhead, fallbacks, and dashboards -- plus two build breaks you'll hit getting there.
ETag cache control in a Spring Boot REST API, re-verified on Spring Boot 4.1.1 and Spring Framework 7.0.9: the zero-code ShallowEtagHeaderFilter, deep caching with WebRequest.checkNotModified(), conditional PUT with If-Match, and strong vs weak ETags.
Learn how to convert LocalDate to ZonedDateTime in Java and back: atStartOfDay(), atTime(), UTC conversion, DST-safe patterns, and a real-world date-range query example across timezones — with annotated code and a quick-reference table.