This article explains what network programming is, why it matters beyond HTTP, compares BIO and NIO models, dives into Java NIO's design with selectors, channels, and ByteBuffer methods, provides full server/client code examples, and shows how Netty simplifies high‑performance networking.
This article explains the fundamentals of Java NIO, showing how to use Channels and ByteBuffer to efficiently read, write, and manipulate large files, including memory‑mapped files and RandomAccessFile alternatives, with clear code examples and step‑by‑step guidance.
This article explores four powerful yet understated caching techniques—HashMap with read‑write locks, LinkedHashMap‑based LRU caches, TreeMap for consistent hashing, and ByteBuffer pooling—detailing their implementations in middleware such as RocketMQ, MyBatis, and Cobar to enhance backend performance.
This article explains the complete flow of how Netty's Sub‑Reactor processes OP_READ events, from selector polling to channel pipelines, and details the adaptive mechanisms of AdaptiveRecvByteBufAllocator and PooledByteBufAllocator that dynamically resize DirectByteBuffers for optimal network data reception.
This article explains Java NIO buffers, covering how to create them, their four core properties (mark, position, limit, capacity), essential methods like allocate, allocateDirect, flip, rewind, clear, and demonstrates usage with comprehensive code examples and diagrams.
This article explains Java NIO buffers, covering how to create them with allocate() and allocateDirect(), describing their four core properties (position, limit, capacity, mark), and detailing essential methods such as put(), get(), flip(), rewind(), clear(), mark(), reset(), hasRemaining() and remaining() with code examples.
The article explains what object serialization is, why it is needed for persistence and network transmission, outlines the major drawbacks of Java's built‑in serialization—including lack of cross‑language support, poor performance, and large payloads—and compares it with a custom ByteBuffer approach while reviewing popular alternative serialization frameworks.
This article provides a detailed analysis of DBLE's memory management module, explaining its structure, configuration parameters, allocation and recycling logic, and includes annotated source code snippets for classes such as DirectByteBufferPool and ByteBufferPage, illustrating how off‑heap and on‑heap memory are handled.
