Dedicated to sharing programmer-architect skills—Java backend, system, microservice, and distributed architectures—to help you become a senior architect.
This guide explains how to use Spring Boot 2.3's layered image feature and Dockerfile optimizations to reduce image size, avoid duplicate layers, and accelerate pushes by only updating changed layers, with detailed commands and analysis.
The article traces the evolution from monolithic Java apps to RPC services, explains why sharding and database partitioning cannot alone achieve limitless scaling due to connection limits, and introduces unitization—assigning each application to a specific database shard—to overcome the bottleneck.
This article introduces JetCache, an open‑source distributed cache built on Spring and Redis, explains its core features and typical use cases, details the main API and annotation support, and provides a step‑by‑step SpringBoot integration guide with full code examples.
This article explains how to handle massive Excel import/export tasks in Java by comparing POI workbook implementations, selecting the appropriate class based on data size, and using EasyExcel with batch processing, JDBC transactions, and pagination to achieve fast, low‑memory operations for hundreds of millions of rows.
This article examines three practical approaches—microservice isolation, Redis‑based whitelist, and gateway‑plus‑AOP—to prevent external exposure of internal APIs, compares their trade‑offs, and provides a complete SpringBoot implementation of the gateway‑AOP solution with code samples.
This article explains the Linux kernel limits that determine how many files and TCP connections a server can handle, shows how to adjust fs.file-max, soft/hard nofile and fs.nr_open parameters, calculates realistic connection counts based on memory, and discusses client‑side port constraints and practical scaling scenarios.
This article explains Alibaba’s Java development guidelines for layered domain models, detailing the purpose and naming rules of DO, DTO, BO, AO, VO, and Query objects, and clarifies the roles of PO, VO, DAO, BO, DTO, and POJO in clean backend architecture.
This article explains the concept of software scaffolding, why it is essential for modern microservice development, and reviews popular scaffolding tools such as Spring Boot, Vue, Maven, Netty, Java EE, and Dropwizard, highlighting their benefits and practical usage.
This guide explains how to achieve pagination and multi‑condition fuzzy queries in Redis by leveraging ZSet for ordered paging and Hash with HSCAN for pattern matching, detailing command usage, combination strategies, and performance optimizations such as temporary set expiration and data freshness handling.
This article provides a detailed walkthrough of Spring's circular‑dependency resolution, explaining the three‑level cache mechanism, step‑by‑step bean creation flow, and the underlying source‑code logic, complete with diagrams and code examples for deep understanding.
