Primarily covers fundamental Java concepts, mainstream frameworks, deep dives into underlying principles, and JVM internals.
This article explains why RabbitMQ is often selected as a message middleware, covering its reliability features, flexibility in routing, performance advantages, ecosystem support, and a concise comparison with Kafka and RocketMQ to help developers make an informed choice.
This article explains RabbitMQ's transaction mechanism, outlines its basic workflow, core channel methods, provides a Java example, compares its advantages and disadvantages with the confirm mode, and offers guidance on choosing the appropriate approach for different scenarios.
This article explains what delayed queues are, details two RabbitMQ implementations using TTL with dead‑letter exchanges and the rabbitmq‑delayed‑message‑exchange plugin, provides full Java configuration and producer/consumer code examples, and outlines common use‑cases such as order timeout and refund processing.
This article explains the concepts of RabbitMQ dead‑letter exchanges and queues, outlines why messages become dead letters, and provides complete Java code examples for configuring exchanges, publishing messages with TTL, and consuming both normal and dead‑letter queues.
RabbitMQ uses exchanges to route messages from producers to queues, and this guide details the four main exchange types—Direct, Topic, Fanout, and Headers—explaining their routing rules, suitable scenarios, and practical examples to help developers choose the right pattern for reliable messaging.
This article clarifies the distinct definitions, purposes, and usage scenarios of RabbitMQ's routing key and binding key, illustrating how they work together in message routing with examples for direct and topic exchanges, including code snippets for publishing and binding.
This article provides a comprehensive overview of RabbitMQ, an open-source AMQP-based message broker, detailing its core components—producers, exchanges, queues, consumers, and broker—along with auxiliary elements like bindings, connections, channels, virtual hosts, and key architectural features such as decoupling, flexible routing, reliability, and scalability.
This article explains why messages can be lost in RabbitMQ at the producer, broker, or consumer stages and provides concrete techniques—including confirm mode, transaction handling, persistence settings, manual acknowledgments, and retry mechanisms with dead‑letter queues—to ensure reliable delivery.
This article explains the JVM method area concept, its implementation as the permanent generation in JDK 1.7, the limitations of that approach, and how JDK 1.8 introduced metaspace using native memory to improve class metadata management and avoid out‑of‑memory errors.
This article explains why JDBC breaks Java’s parent delegation model, describing how the SPI mechanism combined with the thread‑context class loader enables dynamic loading of third‑party drivers, preserving core advantages while allowing flexible driver discovery and loading.
