Dedicated to sharing programmer-architect skills—Java backend, system, microservice, and distributed architectures—to help you become a senior architect.
This article explains what Java lambda expressions are, why they were added in Java 8, their syntax and classification, how they relate to functional interfaces, and demonstrates practical examples including anonymous inner‑class refactoring, stream usage, method references, and custom functional interfaces.
This article compiles a curated list of 20 widely used Java libraries—covering logging, JSON processing, testing, utilities, HTTP, XML, Excel, bytecode manipulation, connection pooling, messaging, PDF, date‑time, collections, email, HTML parsing, cryptography, embedded databases, JDBC debugging, serialization, and networking—to help developers avoid reinventing the wheel and boost productivity.
The article surveys commercial file‑preview services and open‑source front‑end and back‑end solutions for DOCX, PPTX, XLSX, and PDF, compares their capabilities, limitations, and costs, and provides concrete code examples and a reusable Web Component for developers.
This article walks through three common data‑masking approaches—SQL queries using string functions, a Java‑based "sensitive‑plus" plugin, and the mybatis‑mate‑sensitive‑jackson extension—showing configuration, code examples, and how each method masks phone numbers, ID cards and other personal fields.
This article explains OAuth 2.0 by contrasting it with SSO, walks through a real‑world analogy, details the nine‑step authorization flow, defines key terms and roles, and describes how web servers, user agents, and native apps participate in the protocol.
This article walks through the OSI model, explains TCP three‑way handshake and four‑way termination, contrasts TCP with UDP, discusses TIME_WAIT issues, describes long vs short socket connections, shows how to design a custom protocol and implements a reusable Socket connection pool in Node.js.
This article explains the fundamentals of distributed transactions, outlines the CAP theorem trade‑offs, and compares three concrete solutions—two‑phase commit, TCC, and a message‑queue based eventual‑consistency approach—detailing their workflows, advantages, and drawbacks.
OpenAI’s Images 2.0 (gpt-image-2) replaces the traditional image‑generator model with an interactive creative engine that plans, searches the web, and self‑verifies before rendering, offering higher‑quality multi‑language text, batch consistency, and real‑time information at the cost of a token‑based pricing model and limited access to its most advanced features.
This article reviews the ten fastest‑growing open‑source AI projects on GitHub over the past week, detailing each project's core capabilities, architecture, and impact while highlighting three emerging trends: AI agents becoming production tools, the rise of edge and lightweight deployments, and accelerated open‑source contributions from major tech firms.
Hermes Agent is an open‑source, self‑hosted AI agent framework that combines a layered persistent memory system, automatic skill generation, a unified tool registry, and multi‑platform messaging gateways, enabling agents to retain knowledge across sessions and continuously improve their capabilities.
