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Languages & runtimes · #java
Deep offset pagination with Hibernate slows linearly as OFFSET grows. Use keyset pagination with a WHERE clause on the last seen sort key and a suitable index for stable page times.
Stop writing repetitive test methods. Learn how to use JUnit 5 @ParameterizedTest to run a single test logic against multiple data sets using CsvSource and ValueSource.
Learn how to use Java semaphores to limit concurrent resource access. This guide covers creating a semaphore, acquiring/releasing permits, handling timeouts, and verifying correct behavior with a concrete example.
Learn how to free Tomcat worker threads by using Servlet 3.0 asynchronous request processing with a CompletableFuture‑based example and verification steps.
Guide to picking SAX, DOM or StAX based on memory, speed and ease of use, with a table, trade‑offs and a sample SAX implementation.
Native mode changes what a Quarkus app may do at runtime. Here is where reflection breaks, how to register it, and how to measure whether the trade pays off.
Stop using setFirstResult() for deep pagination in Hibernate. Learn why offset-based pagination slows down and how to implement the Keyset (Seek) method for constant-time performance.
Stop letting deep pagination kill your database performance. Learn why offset-based pagination slows down and how to implement Keyset-based pagination in Hibernate for constant-time lookups.
Learn how to implement Java Virtual Threads (Project Loom) to solve platform thread exhaustion in I/O-bound applications, including how to avoid carrier thread pinning.
hibernate
junit
fiber