Getting Started with MyBatis Dynamic SQL

MyBatis Dynamic SQL is a type-safe Java DSL (Domain-Specific Language) for building SQL queries programmatically instead of writing SQL strings…

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Handling Null Values with MapStruct

MapStruct is a compile-time code generation framework that simplifies mapping between Java beans by eliminating boilerplate conversion code and relying…

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Transposing a double[][] Matrix in Java

Matrix manipulation is common in Java applications, from data analytics to machine learning, and matrix transposition is one of the…

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Java PostgreSQL Query Cancellation Explained

PostgreSQL is known for its robustness, performance, and strong support for concurrency. However, while working with long-running queries, background jobs,…

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Joining Unrelated Tables with JPA Criteria API

In real-world enterprise applications, it is common to encounter database tables that do not have explicit JPA relationships (such as…

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How to Fix Hibernate’s token ‘*’ SyntaxException

Hibernate’s JPQL (Java Persistence Query Language) provides an object-oriented abstraction over SQL, allowing us to query entities instead of database…

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Create Unique and Valid Identifiers in Java

Generating valid and unique identifiers is a fundamental requirement in software systems. Identifiers are used to uniquely represent entities such…

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How to Collect Entity IDs from Java Collections

In many applications, we often work with collections of domain entities retrieved from a database, API, or in-memory source, and…

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Mastering Event-Driven Java: Kafka, Pulsar, RabbitMQ, and Beyond

In today’s software landscape, responsiveness, scalability, and real-time data flow are no longer luxuries—they’re expectations. Event-driven architectures (EDA) offer a…

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