Java
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Core Java
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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Core Java
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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Core Java
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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Core Java
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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Core Java
How to Fix Hibernateās token ‘*’ SyntaxException
Hibernateās JPQL (Java Persistence Query Language) provides an object-oriented abstraction over SQL, allowing us to query entities instead of database…
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Core Java
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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Core Java
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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Core Java
Mastering Event-Driven Java: Kafka, Pulsar, RabbitMQ, and Beyond
In todayās software landscape, responsiveness, scalability, and real-time data flow are no longer luxuriesātheyāre expectations. Event-driven architectures (EDA) offer a…
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Core Java
Java and EventāDriven Architectures: Kafka, Pulsar, and the Modern Streaming Landscape
Eventādriven architectures have become a defining approach for building systems that react in real time, scale horizontally, and remain resilient…
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