The announcement details CodeIgniter version 4.3.0, highlighting over 50 enhancements, important breaking changes, required updates to the spark executable and configuration files, and provides links to the changelog and upgrade guide for developers to safely migrate their applications.
The article explains how REST, despite its 20‑year popularity and simplicity, suffers from redundancy, coarse granularity and maintenance overhead, and shows how GraphQL’s declarative, schema‑driven approach, single endpoint and flexible data fetching address these problems while offering a versatile integration architecture and rich ecosystem.
This article presents a collection of basic Java programming methods and best‑practice recommendations—ranging from using @ConfigurationProperties and @RequiredArgsConstructor to modularizing code, handling exceptions, reducing unnecessary database queries, avoiding null returns, and applying design patterns—to help developers write cleaner, more maintainable backend code.
This article explains how Domain‑Driven Design can guide the splitting of monolithic applications into well‑structured microservices by introducing DDD fundamentals, strategic domain modeling, tactical design patterns, and a concrete Go code example that demonstrates a four‑layer architecture.
This article explains Scrapy's comprehensive crawling framework and Twisted's event‑driven networking engine, detailing their core concepts, workflow, code execution process, and how to debug Scrapy spiders using breakpoint tracing, providing a deep technical overview for backend developers.
This article details the design and implementation of a SpringBoot‑based API automation platform with a layui front‑end, covering architecture choices, permission management, hierarchical data design, test case handling, test set execution, result reporting, and future enhancements such as scheduling, email notifications, and multithreading.
This article explains how Go’s fast compilation, lightweight runtime, built‑in concurrency, strong type safety, and cross‑platform compatibility make it a compelling choice for building scalable, high‑performance backend services, and provides practical code examples to get started quickly.
The article examines backlog, abnormal and over‑consumption problems in a small court’s task distribution, proposes an active‑claim model with user‑task lock queues to decouple qualification checks, and shows that these changes raise completion to 100%, cut processing time from 20 hours to under 2 hours while recommending a factory‑plus‑strategy architecture for future extensibility.
This article demonstrates how to convert multiple asynchronous queries into a synchronous response using Java's CompletableFuture, providing step‑by‑step code examples in both Java and Groovy, explaining execution flow, timeout handling, and practical considerations for WebSocket‑like scenarios.
This article explains how to use Sina's short URL API to convert long links into short t.cn links, detailing request formats, required parameters, example PHP code for generating and expanding URLs, and shows sample JSON and XML responses.
This article explores Spring's eleven most commonly used extension points—including custom interceptors, bean factory access, global exception handling, type converters, configuration imports, startup runners, bean definition tweaks, bean post‑processing, initialization methods, shutdown hooks, and custom scopes—providing code examples and practical guidance for Java backend developers.
This article explains the fundamental components of RPC architecture, details the client‑server roles, communication protocols, serialization methods, transport protocols, and synchronous versus asynchronous invocation patterns, providing a comprehensive guide for building a custom RPC framework.
This article provides a detailed introduction to Spring Boot, covering its purpose, advantages, core @SpringBootApplication annotation, supported logging frameworks, starter mechanism, new features in version 2.x, configuration methods, security, CORS handling, actuator monitoring, hot deployment, multi‑datasource setup, session sharing, and packaging differences, all aimed at helping developers quickly adopt and master the framework.
This article explains why Medium transitioned from a monolithic Node.js application to a microservice architecture, outlines the core design principles, shares practical strategies for building, deploying, and observing services, and warns about common pitfalls such as the microservice syndrome.
This article outlines the typical evolution stages of large internet system architectures—from single‑node deployments to cluster, distributed, and future cloud‑native designs—highlighting the business‑driven reasons, technical challenges, and practical tips for each phase.
This article comprehensively reviews the various techniques for injecting beans into the Spring container—including XML and properties configuration files, annotation-based declarations, manual BeanDefinition registration, direct singleton registration, and FactoryBean usage—providing code examples, underlying principles, and practical guidance for each method.
This article examines four common approaches for synchronizing product data from MySQL to Elasticsearch—synchronous dual write, asynchronous dual write with message queues, scheduled batch jobs, and binlog‑based data subscription—detailing their advantages, drawbacks, and implementation considerations.
This article explains Bilibili’s unified API management platform, covering service launch processes, manual versus automated metadata collection, code‑first API definitions in Go and Java, version control, collaboration features, mock testing, and micro‑service standardization to improve development efficiency and reduce operational costs.
Spring Cloud 2022, built on Spring Framework 6.x and Spring Boot 3.x, requires Java 17 and introduces crucial bug fixes across modules like Gateway, Commons, and Kubernetes, along with new features such as a secure flag for service instances and optimized load‑balancing.
This guide explains how to use Spring MVC's @RequestMapping and its shortcut annotations, choose between PathPattern and AntPathMatcher for URI matching, configure suffix and media type handling, and customize request mapping with parameters, headers, and programmatic registration.
This article explains why Redis is essential for flash‑sale systems, detailing load characteristics, the three sale phases, Redis features such as high concurrency and atomic operations, and practical implementations using Lua scripts and distributed locks to ensure safe stock checking and deduction.
This article explains the fundamentals of web application architecture, covering its core components, layered models, modern design patterns, popular technologies, and best practices for building secure, scalable, and maintainable web systems across cloud and on‑premise environments.
The article reflects on Elon Musk’s criticism of microservices, argues that the architecture is often over‑hyped and misapplied, compares it with monolithic and other service granularity models, and warns that blind adoption driven by trends can lead to costly technical debt.
This article reviews the rapid evolution of PHP over the past decade, highlights the role of the PHP Foundation, showcases new PHP 8.2 features with code examples, and analyses ecosystem statistics such as Packagist growth and framework adoption to illustrate why 2023 is a pivotal year for PHP developers.
This article explains how Node.js uses the NODE_CHANNEL_FD environment variable to establish a socketpair for IPC between a parent process and its child, detailing the spawn implementation, underlying libuv handling, and how a Go subprocess can read and write through the shared file descriptor.
This article explains how to start a new project using Domain‑Driven Design, covering key terminology, architecture evolution from monolith to microservices, bounded context division, the four DDD boundaries, clean layered, hexagonal and onion architectures, and practical design guidelines for backend systems.
This article demonstrates how to implement the Chain of Responsibility design pattern in PHP using the Hyperf framework, detailing the file structure, core classes such as IndexController, HandlerInterface, AbstractHandler, and concrete handlers, and includes a unit test example to verify the workflow.
This article explains how to use @ExceptionHandler with @Controller, @ControllerAdvice, and @RestControllerAdvice for local and global exception handling in Spring MVC, details supported method parameters and return types, and shows how to customize REST API error responses by extending ResponseEntityExceptionHandler.
This article walks through the complete design and implementation of a friend‑follow microservice, covering requirement analysis, MySQL table schema, Redis set operations, Spring Boot dependencies, configuration, service and controller code, gateway routing, and end‑to‑end testing with concrete examples and performance insights.
The article analyzes the growing demands on network I/O, explains Linux’s kernel bottlenecks, and shows how user‑space frameworks like DPDK and UIO can achieve multi‑hundred‑million packets per second through techniques such as huge pages, SIMD, zero‑copy, and careful CPU cache management.
This article introduces RabbitMQ's core concepts, key features, and typical use cases, then provides step‑by‑step installation instructions for macOS, Windows, and CentOS, and demonstrates how to configure and use the delayed‑message plugin with Java Spring Boot code examples.
This guide demonstrates how to modify Spring Boot 2.4.12 logger levels at runtime using LoggingSystem, enabling per‑package or whole‑application log level changes without editing configuration files or restarting the service.
This article explains the core distinctions between Remote Procedure Call (RPC) and Message Queue (MQ) technologies, covering their architectures, communication patterns, functional features, and performance considerations, and outlines typical use cases such as synchronous calls, decoupling, traffic shaping, and asynchronous processing in distributed systems.
This guide demonstrates how to use Java 11’s HttpClient to build a WebSocket client, implement a listener for various message events, and send both text and binary data, including a complete runnable example that showcases connection setup, message handling, and periodic sending.
Learn how Java 11’s built‑in HttpClient simplifies both synchronous and asynchronous HTTP calls, covering client and request creation, setting URIs, methods, headers, timeouts, and various body types, with complete code examples and a comparison to alternative libraries.
This article explains how to create a reusable dynamic Feign client in Java, replacing multiple static Feign interfaces with a generic service that can invoke any microservice endpoint via configurable URLs, and provides full code examples and usage instructions.
The guide defines backend coding standards and best practices, specifying clear naming conventions for classes, methods, variables and constants, enforcing consistent code style via .editorconfig, recommending unchecked exceptions for simpler error handling, promoting structured asynchronous logging with trace IDs, and outlining performance optimizations such as loop refinement, CompletableFuture concurrency, and proper resource management to prevent memory leaks.
This article explains how to create a Spring Boot package that keeps dependencies external by configuring the spring-boot-maven-plugin and maven-assembly-plugin, using a ZIP layout and PropertiesLauncher, so the application can be started with a custom loader.path that points to a libs directory.
This article explores Java 9's module system, its core principles, and practical implementation through a multi-module project example, highlighting benefits like modular encapsulation, dependency management, and reduced resource usage.
This article explains how to protect user privacy by applying data desensitization in a Java backend, using a custom annotation and Jackson serializer to mask sensitive fields such as phone numbers, emails, IDs, and names during JSON serialization.
This tutorial walks through setting up an Elasticsearch server, creating a Java REST client, implementing a custom GET‑with‑body request, building a reusable ESClient wrapper with common CRUD and search methods, and providing Groovy performance test cases for indexing and querying.
This article explains how Spring Boot 3 introduces a native declarative HTTP client via HttpServiceProxyFactory, showing required dependencies, supported annotations, interface definition, and complete code examples for building, configuring, and invoking remote HTTP services without third‑party libraries.
This article demonstrates how to create a dynamically configurable thread pool in a Spring Boot backend by leveraging Nacos as a configuration center, covering dependency setup, YAML configuration, Java implementation with @RefreshScope, runtime parameter updates, and a simple controller for testing.
This article explains how NetEase Cloud Music tackled the tight coupling between frontend UI and backend services by introducing a Backend‑For‑Frontend layer built on GraphQL, detailing the architectural choices, low‑code editor, custom directives, deployment pipeline, and the resulting improvements in scalability and developer productivity.
This article explains how to redesign an automated testing framework by applying the Strategy pattern to replace complex conditional branches, thereby improving script reusability, maintainability, and extensibility across diverse business scenarios in Python.
This guide explains how to create a custom Oracle datasource plugin for Nacos 2.2 by adding Maven dependencies, importing the Oracle SQL script, configuring connection properties, and setting the datasource platform, enabling Nacos to use Oracle instead of the default MySQL or Derby.
This article explains the Decorator (Wrapper) pattern, shows how to apply it in a Spring Boot project with concrete surfing‑service examples, demonstrates single‑ and multi‑layer decorators, and provides complete Java code and controller snippets to illustrate dynamic behavior extension without modifying existing classes.
This article provides a comprehensive guide to Java's BigDecimal class, covering its purpose for high‑precision arithmetic, common constructors, usage pitfalls with double values, essential methods, comparison techniques, formatting options, exception handling, and a utility class for everyday operations.
This article explains how to batch multiple cluster endpoint requests in Go by using a token‑based queue and concurrent workers, dramatically reducing load on the registration center while requiring minimal changes to existing code.
This article describes the background, design, configuration, encryption, mock data handling, and practical deployment steps of an external gateway that unifies and secures communication between internal vehicle payment services and external channels such as Apple Pay, Alipay, WeChat Pay, and UnionPay.
This article provides a comprehensive guide to PHP multi‑process development on Linux, covering basic shell commands, ELF file types, terminal concepts, process states, orphan and zombie processes, process groups and sessions, signal handling, and practical pcntl/posix code examples for forking, daemonizing, and managing child processes.
The article explains Go’s caller‑callee model, stack‑frame layout, and how parameter and return‑value passing shifted in Go 1.17.1—using registers for up to nine arguments or results and the stack for any beyond—highlighting the impact on performance and optimization.
Node.js is a server‑side JavaScript runtime built on V8 that replaces the browser environment with native libraries, uses libuv’s event loop and thread pool to provide non‑blocking asynchronous I/O, and organizes its architecture into application code, V8, bindings, and libuv layers for efficient backend development.
This article explains the OSI seven‑layer model, compares RPC and HTTP services, details RPC architecture, synchronous vs asynchronous calls, and reviews popular RPC frameworks such as gRPC, Thrift, and Dubbo, helping developers choose the right communication approach for enterprise applications.
This article demonstrates how to use the Decorator (Wrapper) pattern in a Spring Boot application to extend existing services with additional responsibilities, showing both single‑layer and multi‑layer decorations through concrete code examples and controller endpoints.
This article introduces GraphQL, explains its adoption by GitHub, discusses its challenges, and demonstrates how Apache APISIX can perform fine‑grained GraphQL routing with practical code examples and future enhancement ideas.
This article introduces a two-level cache framework designed to address issues with Spring-Cache, providing enhanced caching strategies and improved performance in Java-based backend systems.
The article presents a branch‑path graph scheduling framework that extends traditional finite‑directed‑graph scheduling with branch nodes and AND/OR activation semantics, converting it into a deterministic directed acyclic graph, thereby eliminating exponential state growth and improving scalability, readability, and maintainability of Vivo’s real‑time advertising estimation service.
Janus is Baidu’s high‑throughput, multi‑purpose gateway that complements BFE, supporting traffic, business, and hybrid routing for dozens of internal services; the article explains its motivations, architecture, three‑tier routing rules, variable and conditional expressions, plugin system, performance benchmarks, and future extensions.
AGEIPort is Alibaba's event‑driven, high‑throughput data import‑export framework that handles hundreds of billions of rows monthly, offering transparent concurrency, decentralized clustering, GitOps‑based delivery, and standardized domain‑model APIs to simplify complex B2B scenarios.
This article introduces PhpSpreadsheet—the modern PHP library that replaces PHPExcel—showing how to install it, import necessary namespaces, create a spreadsheet with data, build bar and donut charts, configure gridlines and positions, and finally output the workbook as an XLSX file.
This article provides a comprehensive guide to MyBatis, covering its basic concepts, Maven dependency configuration, XML setup, entity and mapper definitions, execution flow using dynamic proxies, and a custom lightweight framework implementation with full Java code examples.
This article explains the terminology, background, goals, technical choices, workflow, and API design of a token‑based authentication solution that leverages OAuth2 password grant and JWT to provide secure, stateless, cross‑platform access for enterprise applications.
Spring MVC provides built‑in CORS support, allowing you to configure preflight, simple, and actual requests via global HandlerMapping settings, @CrossOrigin annotations, Java‑based CorsRegistry, or CorsFilter, with detailed options for origins, headers, methods, credentials, and max‑age to secure cross‑origin interactions.
This article explains why PIG chose Tencent Polaris for service governance, outlines the necessary adjustments when moving to Spring Boot 3.0—including Java 17, Jakarta EE, SPI changes, security and documentation updates—and lists the upgraded Spring Boot starters that support the new platform.
This article outlines the essential requirements for empowering autonomous teams, details the challenges of transitioning and splitting monolithic systems into microservices—including organizational, technical, and cultural hurdles—and presents comprehensive best‑practice recommendations for platform design, service development, deployment, operations, and team management.
The article explains how a WeChat e‑commerce team adopted Domain‑Driven Design, reorganizing a fast‑paced, multi‑team project into a four‑layer onion architecture with strategic sub‑domains, bounded contexts, anti‑corruption layers, domain events, aggregates, repositories and services, to achieve maintainability, extensibility, cohesion and loose coupling.
This article explains how to integrate Redis into a Rust backend by defining resource structs, wrapping the client with enums, implementing a connection pool using r2d2, creating a global singleton with once_cell, and providing example code for querying and storing data.
The article demonstrates how to apply the Chain of Responsibility pattern to Java servlet filters by defining abstract and concrete validation filters, organizing them in an ordered FilterChain that uses ThreadLocal state (including composite filters) to replace tangled if‑else logic, improve extensibility, and warn of potential ThreadLocal memory‑leak risks.
This article explains the various Apache Commons Lang StringUtils methods such as isEmpty, isNotEmpty, isAnyEmpty, isNoneEmpty, isBlank, isNotBlank, isAnyBlank, and isNoneBlank, providing usage examples, code snippets, and detailed behavior for handling null, empty, and whitespace strings in Java.
This article examines Java file change monitoring, explains the limitations of a simple timestamp‑polling approach, details a JDK bug that loses millisecond precision, explores the built‑in WatchService and its fallback to polling, and demonstrates how Linux inotify provides a more reliable solution.
CakePHP 4.4.8, the maintenance release of the 4.4 branch, introduces several bug fixes and enhancements such as aligned scheme handling, improved paginator compatibility, infinite‑loop prevention when creating table classes, better mail assertion, pagination defaults fixes, and refined type hints and API documentation.
This article explains what API documentation is, why it is essential for backend development, outlines standard interface specifications, and discusses efficient ways to produce and maintain API docs, including the use of modern tooling to automate generation and testing.
The article argues that Go deliberately avoids heavyweight frameworks by following the Unix philosophy of small, composable tools, discusses the trade‑offs of time‑saving versus long‑term maintainability, and shows how building services with minimal libraries can lead to looser coupling and faster delivery.
This article analyzes how the Qingleng low-code platform improves development efficiency and reduces costs in an automotive technical department by enabling rapid application development through visual interfaces and automated backend processes, addressing pain points like code redundancy and slow requirement response.
This article introduces Hutool, a compact yet comprehensive Java utility library that wraps common JDK functions—such as file I/O, encryption, HTML handling, and scheduling—into easy‑to‑use APIs, provides installation instructions, code snippets, and links to its GitHub repository and official site.
The article presents Alchemy, a comprehensive code quality analysis platform that integrates static analysis, unit‑test rule scanning, duplicate‑code detection, custom rule checks, and code search into GitLab CI/CD pipelines, addressing common DevOps challenges and improving backend development efficiency.
This article analyzes why a Spring service encounters "connection closed" errors during long‑running transactions, explains how MyBatis and Druid manage connections, and provides a programmatic‑transaction solution that splits large operations into smaller units to prevent connection leaks and timeouts.
This article explains how Spring configures its parent and child application contexts using web.xml, ContextLoaderListener, and DispatcherServlet, detailing the loading of configuration files, context class determination, bean definition processing, and the refresh cycle that ultimately stores the WebApplicationContext in the ServletContext.
This article provides an in‑depth tutorial on RocketMQ, covering normal, ordered, delayed, transactional, and batch messages, their production and consumption patterns, retry mechanisms, message filtering, and dead‑letter handling, complete with Java code examples for each scenario.
This article investigates a production issue where Redis increment operations return null each morning, explores hypotheses about Redis pipelines, transactions, and Spring @Transactional interaction, reproduces the bug, analyzes the source code, and proposes two practical solutions to prevent null returns.
This guide outlines Kafka stability best practices across three phases—pre‑prevention with tuning, producer/consumer guidelines, and cluster configuration; runtime monitoring using white‑box and black‑box metrics and alerts; and fault resolution strategies for backlogs, consumption blocks, and message loss, plus cost control and idempotence techniques.
This article explains how to use PECL with the -d php_suffix and -r options to install and uninstall the same extension across multiple PHP versions, and also announces an online PHP training class for beginners to advanced learners.
Elon Musk’s recent code‑review visit to Twitter’s headquarters unveiled detailed diagrams of the platform’s Timeline architecture, highlighting components like the Timeline Mixer and Home Mixer, accompanied by annotated images, simplified versions, a decade‑old comparison, and Musk’s own performance notes.
An accidental discovery by a GitHub engineer revealed that moving a single '&' operator in a Go program eliminated unnecessary copies, reduced heap allocations via escape analysis, and improved execution speed by 42%, highlighting common pitfalls in Go’s regex engine, malloc, and garbage collection.
This article explains Zookeeper's leader election mechanism by comparing it to human voting, detailing the four core concepts, the role of zxid, the step‑by‑step process during startup and runtime failures, and the key terms every interviewee should know.
This article details the motivation, benefits, and technical implementation of refactoring the document parsing SDK from a monolithic design to a three‑layer architecture using Adapter, Decorator, and Proxy patterns, reducing code size by over 70% and improving extensibility for multiple document formats.
The article shows how Domain‑Driven Design can guide microservice decomposition by using strategic layers (core, supporting, generic domains) and tactical building blocks (aggregates, entities, value objects, services, events), illustrated with a membership‑center example and a four‑layer Go code architecture, while noting DDD’s suitability for complex domains.
Redis 6.0 implements several compact data structures—SDS, ziplist, quicklist, hash, set, and ZSet—each optimized for memory efficiency and performance, and this guide explains their definitions, internal layouts, usage scenarios, and key implementation details such as packing attributes, incremental rehashing, and skiplist operations.
This post shares a free, extensive compilation of interview questions and detailed explanations covering Java fundamentals, multithreading, Spring framework, Redis, MyBatis and other backend technologies, encouraging systematic preparation and offering a QR‑code method to obtain the full document.
This article walks through the fundamentals of Spring's transaction management, presenting a practical example, detailed execution workflow, and step‑by‑step source‑code analysis—including bean creation, AOP proxy generation, transaction attribute retrieval, transaction start, commit, and rollback – to help developers master Spring transaction internals.
This tutorial demonstrates how to integrate the Decorator design pattern into a Spring Boot application, showing a basic interface, concrete services, a simple decorator, and a multi‑layer decorator with full code examples and runtime output.
To maintain stable Java services as projects grow, this article introduces essential code quality tools—including Alibaba Java Coding Guidelines, CheckStyle, PMD, FindBugs, and SonarLint—detailing their installation, usage, and key features to streamline code reviews and reduce bugs.
The article presents a comprehensive overview of backend architecture, covering product analysis, microservice design principles, real‑time messaging evolution, load‑balancing migration from HAProxy to Nginx, request idempotency techniques using AOP and Redis, and a detailed discussion of service governance challenges and solutions.
This guide walks beginners through building a Java web crawler that fetches bestseller book cover images, covering data scraping, HTML parsing with jsoup or regex, and saving images locally, illustrated step‑by‑step with code examples and a tiered learning roadmap.
This article explores Huolala’s evolution of application architecture—from a single monolithic system through RPC and SOA to microservices and service mesh—detailing the challenges, technical trade‑offs, and framework selections such as Dubbo, Spring Cloud, and Istio for robust backend governance.
The article presents eight beginner‑friendly open‑source PHP projects—including HumHub, Flarum, Typecho, Question2Answer, PrestaShop, ActionView, Wizard, and Mochat—providing repository links and brief descriptions, and also announces a PHP development training class with enrollment details.
This article examines Elasticsearch's deep pagination challenges and presents three practical solutions—basic from/size, scroll API, and search after—detailing their execution phases, performance trade‑offs, code examples, and guidance on when to choose each method for efficient data retrieval.
This guide shows the original Maven dependency for the MySQL Connector/J library and provides the updated coordinates with the newer groupId, artifactId, and version, helping Java developers keep their projects up to date.
The article outlines the typical evolution of large‑scale internet system architecture—from simple single‑node deployments through cluster and distributed cluster stages to future cloud‑native designs—highlighting the business‑driven reasons, technical challenges, security concerns, and practical principles for each phase.
