Official JD Tech public account delivering best practices and technology innovation.
This article describes the background, functional requirements, and a complete Node.js implementation for querying contract information and handling contract extensions using natural‑language prompts through an MCP client and server architecture.
This article describes the pain points of daily on‑call debugging, explains how Java StackTraceElement can be leveraged to construct a chain‑style call‑stack visualizer, details the implementation of a lightweight tracing utility with configurable filters, and demonstrates its integration and practical usage in production environments.
The article presents a comprehensive adaptive degradation and automatic recovery framework for JD Alliance's recommendation system, designed to handle high‑frequency, instantaneous traffic surges during large promotions by combining real‑time monitoring, Wilson‑interval‑based timeout correction, scenario‑aware control, traffic slicing, linear‑programming‑driven chain optimization, and low‑cost business‑agnostic APIs, achieving over 90% reduction in traffic loss and zero incidents.
This article explains the concept of Java's Runtime.addShutdownHook, details its underlying implementation in the Runtime and ApplicationShutdownHooks classes, demonstrates usage with code examples, discusses typical application scenarios, potential risks of long‑running hooks, and provides best‑practice recommendations for safe JVM shutdown handling.
This article details JD's Taro framework adaptation for HarmonyOS, tracing its evolution from ArkTS-based to C-API-driven single- and multi-threaded architectures, highlighting performance gains, feature support, and future enhancements for native-like HarmonyOS app development.
This paper investigates the "sandglass" phenomenon in residual‑quantized semantic identifiers for generative search and recommendation, analyzes its causes of path sparsity and long‑tail token distribution, and proposes heuristic and adaptive token‑removal methods that substantially improve model performance in e‑commerce scenarios.
This article compares Go and Java by examining their core language features, code organization, visibility rules, variable and constant declarations, method and function syntax, interface implementation, basic and reference data types, error handling mechanisms, and control‑flow constructs, providing Java developers with a concise guide to Go's design principles and cloud‑native strengths.
This article describes how reusable H5 marketing activity pages can be quickly built using five technical solutions, introduces a centralized workspace and monorepo structure with example configurations, and explains the benefits and considerations of central repository management for front‑end development.
Leveraging AI-driven monocular depth estimation, novel view synthesis, and MV‑HEVC encoding, the JD Retail Content R&D team presents an end‑to‑end pipeline that converts 2D video assets into high‑quality immersive 3D spatial videos, introduces the large‑scale StereoV1K dataset, and demonstrates superior performance over existing methods.
This article discusses solutions to system bottlenecks in supply chain planning business development, focusing on ClickHouse ReplacingMergeTree table creation, local join optimization, and real-time data synchronization between TiDB and ClickHouse to improve query performance and system stability.
