This guide explains monolithic and microservice architectures, compares their advantages and drawbacks, outlines suitable scenarios, and reviews popular Java backend frameworks and versioning strategies to help developers choose the right approach for scalable applications.
COLA 3.0 removes unnecessary components such as Command, Interceptor, Convertor, Validator, and Assembler, applying Ockham’s razor to simplify the framework, improve readability, and reduce maintenance overhead while preserving essential extension points, illustrating how leaner architecture can enhance Java application development.
This article provides a concise overview of SpringBoot, covering its core functionalities, pros and cons, CLI tool, Maven build setup, and frequently used annotations, followed by a promotion for a comprehensive interview question PDF collection targeting major internet companies.
This article explains the definitions, distinctions, and practical usage of View Object (VO), Data Transfer Object (DTO), Domain Object (DO), and Persistent Object (PO) in layered software architecture, illustrating their roles, conversion processes, and design considerations for clean separation of concerns.
This article explains how to upgrade the think-mongo module for ThinkJS to work with MongoDB 4.x, detailing API changes, new CRUD method mappings, transaction support, and provides code examples for adapting existing projects to the latest MongoDB features.
The voting service for 'You Are My Youth 2' was re‑architected using Docker‑based QAE and the Skywalker microservices platform, adding containerized one‑click scaling, cross‑data‑center MySQL/Couchbase/HBase high availability, and Hive/Impala real‑time processing, which doubled performance, cut preparation from 30 days to 12 hours, and incorporated third‑party audit verification.
This article provides a comprehensive overview of HTTP status codes—from informational 1xx responses to client‑error 4xx and server‑error 5xx codes—including the newer RFC 6585 codes, explaining their meanings and typical usage scenarios for developers.
This article explains Nginx's high performance by detailing its multi‑process architecture, asynchronous event‑driven I/O, request handling flow, module types, comparison with Apache, maximum connection calculations, HTTP request/response structure, and the differences among select, poll, and epoll.
This article explains how to integrate Spring Boot Actuator for exposing health and metrics endpoints, configure security, disable specific endpoints, and visualize monitoring data using JConsole and Spring Boot Admin, including necessary Maven dependencies and code examples, while also noting a promotional interview‑question PDF resource.
The article explains PHP's strncmp function, a binary‑safe, case‑sensitive string comparison that compares the first N characters of two strings, detailing its syntax, parameters, return values, and providing practical code examples with expected outputs.
This article explains the PHP strcmp() function, describing its binary‑safe, case‑sensitive string comparison behavior, detailing its parameters and return values, and providing multiple code examples that illustrate how different string inputs affect the function’s output.
This article explains Java's throw‑catch mechanism, the three core principles of exception handling, and demonstrates how to design a custom exception hierarchy and a Spring Boot @ControllerAdvice‑based global handler to simplify error processing and improve code maintainability.
This article surveys the rise of microservices, explains their advantages, and provides a concise overview of the most popular Java, .NET, Node.js, Go, and Python frameworks that enable developers to build scalable, loosely‑coupled services.
This article presents a curated list of sixteen IntelliJ IDEA plugins compatible with version 2020.1, detailing each plugin's purpose, key features, usage shortcuts, and visual screenshots to help Java developers enhance productivity and code quality.
This article explains the Java RMI communication model, the need for object serialization, the requirements for serializable classes, and provides complete example code for a Person class, object I/O operations, and a simple socket‑based stub‑skeleton implementation to demonstrate remote object retrieval.
This article explains how to use Maven parent POMs, properties, and BOM (Bill of Materials) to centrally manage version numbers across multi‑module Java projects, resolve dependency conflicts, and simplify builds for backend development teams.
This article provides a concise yet comprehensive overview of the backend development technology stack, covering load balancing, microservice ecosystems, RPC frameworks, service discovery, relational and NoSQL databases, caching strategies, message queues, object storage, and search engines, while highlighting practical configurations and real‑world trade‑offs.
This article examines Project Lombok’s ability to cut boilerplate in Java, walks through before‑and‑after code examples, and reveals five major drawbacks—including JDK compatibility, forced adoption, readability issues, increased coupling, and technical debt—helping developers decide whether to embrace or avoid Lombok.
An upgrade of MyBatis from 3.2.3 to 3.4.6 caused parameterType mismatches in XML mappings, turning previously ignored type declarations into enforced ones, which led to ClassCastException errors for LocalDateTime and other types, prompting a root‑cause analysis and recommendations for careful version testing and configuration alignment.
The article shares personal experiences with Kotlin coroutines, highlighting debugging challenges, loss of context across threads, pitfalls of using ThreadLocal, synchronization issues, and performance trade‑offs, ultimately explaining why the author stopped using coroutines for server‑side development.
This article walks readers through building a high‑efficiency API testing workflow using Swagger’s automated documentation and Springfox integration, covering setup, configuration, mock services, code coverage, keyword‑driven automation, and practical deployment examples with Maven dependencies and live Swagger UI demonstrations.
This article explains PHP's strstr() function, detailing its purpose of locating the first occurrence of a needle in a haystack string, describing its parameters and return values, noting case‑sensitivity and performance considerations, and providing two practical code examples.
This article explains the inner workings of Spring Boot’s @SpringBootApplication annotation, the loading of auto‑configuration classes from META‑INF/spring.factories, the refresh of the application context, the creation of the embedded Tomcat server, and demonstrates how to create a custom starter with configuration properties.
This article presents a concise Redisson distributed‑lock example with Maven configuration, demonstrates basic lock usage, enumerates the Redis commands and Lua script semantics involved, and provides a detailed walkthrough of the relevant Java source code, highlighting key implementation details.
This article examines the trade‑offs of using Project Lombok in Java projects, showing how its syntactic sugar reduces boilerplate but can introduce technical debt, version‑compatibility issues, hidden coupling, and readability problems that may outweigh its short‑term benefits.
After a year of using Project Lombok, the author reflects on how the library initially simplifies Java boilerplate but eventually introduces technical debt, version‑compatibility issues, hidden complexity, and tighter coupling, urging teams to weigh its short‑term convenience against long‑term maintainability.
This article explains how Redis can be used for distributed locking, covering the setnx command, the SET command with NX and PX options, common pitfalls, Lua‑based atomic unlock scripts, the Redisson client, and the RedLock algorithm for achieving reliable locks across multiple nodes.
This guide walks through installing the RabbitMQ delayed‑message‑exchange plugin, configuring it in a Spring Boot application, and building Java components to send and receive delayed order‑cancellation messages, comparing the plugin approach with dead‑letter queues and providing complete code snippets and deployment steps.
This article explains how to replace repetitive if‑else rule checks in PHP with a generic rule module using the Strategy design pattern and reflection, providing step‑by‑step code examples, architectural diagrams, and a clear path to extend rules without modifying client code.
Learn how to efficiently convert between PO, VO, and DTO objects in Java using Spring BeanUtils for identical fields and MapStruct for custom mappings, including single objects, lists, and merging multiple sources, with full Maven setup and generated implementation details.
This tutorial explains how to define, implement, and throw custom Java exceptions, providing complete example code, step‑by‑step creation instructions, and a practical demo that integrates the custom exception into a JSON‑processing method.
This article examines Meituan's evolution from hard‑coded validation to a custom rule‑engine framework, detailing case studies of store information checks, audit workflows, and performance metric calculations, and explains the design of the Maze framework that separates business logic from system code while improving maintainability and scalability.
This article explains how to enable and use Spring Boot's graceful shutdown feature in version 2.3, including configuration of the embedded web server and Actuator, and also provides a custom solution for older Spring Boot releases to achieve smooth termination of ongoing requests.
This article outlines a five‑stage Laravel learning path, covering simple CRUD operations, database factories and seeders, form validation with request classes, browser automation testing with Dusk, and the application of design patterns to build robust backend applications.
Through a 30‑minute Apache JMeter load test on the Spring Boot Petclinic sample, we captured heap dumps and used HeapHero to reveal that 65% of memory is wasted due to string duplication, inefficient collections, and poor initialization, offering concrete code‑level recommendations to improve memory efficiency.
This article surveys the Laravel ecosystem, highlighting that over 7,176 extensions exist and presenting the 100 most‑downloaded packages, each with a brief description of its functionality, to help developers choose tools that streamline coding and improve productivity.
Marking its 25th anniversary in June 2020, PHP has shed its legacy reputation by dramatically improving performance with PHP 7.4, introducing features like FFI and preloading, adopting Composer for package management, and enhancing security, while hinting at future developments such as PHP 8.0.
This article explains practical API security techniques for protecting data exchange with third‑party systems, covering token generation and storage, timestamp validation to mitigate DoS attacks, MD5‑based request signing with nonce, preventing duplicate submissions using Redis, and illustrates the concepts with comprehensive Java code examples.
This guide shows how to run a Dockerized FTP server, configure its network and ports, install the PHP ftp-client library, and use PHP code to upload and download files through the containerized service.
This article explains how Spring Boot 2.3 implements graceful shutdown, showing configuration properties, code examples, container-specific behaviors, and how to trigger shutdown via the actuator endpoint, while also noting differences among Tomcat, Reactor Netty, and Undertow.
This article explains how Swoole's multi‑process model isolates memory in PHP, recommends external storage such as Redis or shared memory via Swoole/Table, details capacity calculations, handling of oversized strings, and provides a complete PHP example demonstrating table creation, data storage, and server communication.
This article walks through a complete Go implementation of a food recommendation API using Domain-Driven Design, covering project setup, layer separation, entity and repository definitions, infrastructure configuration, application services, HTTP interfaces, authentication, and how to run the application.
This tutorial introduces Go's core concepts—including package structure, built‑in types, variable and constant declarations, and function definitions—explaining syntax nuances, import styles, type creation, and initialization patterns to help beginners quickly become productive in Go.
This article introduces fifteen Alibaba open‑source and commercial developer tools—including Arthas, Cloud Toolkit, ChaosBlade, ARMS, Docsite, Freeline, PTS, and more—detailing their core functions, typical usage scenarios, tutorial links, and acquisition methods to help backend engineers boost productivity and reliability.
This article explains the core benefits, essential design principles, and common limitations of microservice architecture, offering practical guidance on functional scope, cohesion, API integration, data isolation, traffic management, automation, and monitoring to help teams build scalable, resilient software systems.
This article presents a comprehensive distributed retry system that leverages a distributed scheduling mechanism to ensure eventual consistency, reduce manual recovery costs, and provide flexible retry strategies, automatic recovery detection, visual management, rate limiting, and intelligent retry for backend services.
This article presents comprehensive Java code optimization techniques, emphasizing error avoidance, reduced code size, and improved execution efficiency through practices such as using final modifiers, object reuse, local variables, proper resource handling, appropriate data structures, bitwise operations, and careful use of collections and concurrency utilities.
This tutorial demonstrates how to build a WebSocket server using PHP's Swoole extension and a corresponding HTML/JavaScript client, covering protocol basics, server-side event handling for connections, messages, and closures, and showing the complete code and execution results for real‑time bidirectional communication.
The Beijing Elixir Meetup featured four technical talks covering Rust integration with Elixir, an introduction to Phoenix LiveView, deep dives into bits, bytes, strings and emojis in Elixir, and using FoundationDB within the Erlang/Elixir ecosystem, all accompanied by detailed slide links and a lively Q&A session.
This article outlines the key characteristics of large‑scale web systems and walks through their architectural evolution—from monolithic beginnings to service separation, caching, clustering, read/write splitting, CDN/reverse‑proxy acceleration, distributed storage, NoSQL, business splitting, and distributed services—while highlighting core values and common design pitfalls.
This article introduces Swoole, a production‑grade asynchronous network engine for PHP, outlines the required prerequisites, shows a quick PECL installation, explains how to enable the extension in php.ini, and provides a complete example of building and testing a simple HTTP server.
The article explains how traditional Java web projects that bundle JSP, static assets, and business logic into a single WAR cause performance and scalability issues, and advocates separating front‑end static resources from back‑end services to achieve true decoupling, better fault tolerance, and easier horizontal scaling.
This article explains the principles and practical implementation of WebSocket, compares it with HTTP, discusses when to use it, and details a complete backend and frontend solution using Spring WebSocket, SockJS, and STOMP for real‑time communication in web applications.
This article explores common caching read/write patterns—including Cache‑Aside, Read‑Through/Write‑Through, Write‑Back, and Write‑Around—detailing their mechanisms, advantages, disadvantages, and suitable application scenarios, while also addressing consistency and thread‑safety concerns. It also provides practical guidance on handling cache misses and ensuring data integrity across distributed systems.
This article explains how Spring handles circular dependencies in singleton beans by using a three‑level cache, contrasts it with prototype beans that cannot participate, and demonstrates a minimal implementation that mimics Spring's approach, linking the concept to the classic two‑sum algorithm.
This article outlines what middleware development entails, the essential technical and professional qualities required, various types of middleware, and a step‑by‑step learning roadmap for Java developers aiming to break into middleware engineering.
This guide explains how to configure Laravel for read/write database separation and set up Nginx load balancing, covering hardware requirements, Laravel config/database.php adjustments, Nginx upstream strategies, detailed server blocks, and essential parameter explanations for a scalable web architecture.
This tutorial demonstrates how to leverage IntelliJ IDEA's diagram feature to view, clean up, and enrich the inheritance and interface implementation hierarchy of Java Servlet classes, including removing irrelevant nodes, inspecting class members, adding new classes, and jumping to source code.
This article explains how Tomcat, a popular Java web server and servlet container, handles incoming HTTP requests by providing socket services, distributing URLs to web applications, encapsulating request and response objects, and invoking servlet classes, illustrated with step‑by‑step screenshots of a simple implementation.
The April 22 release of Alibaba’s Java Development Manual “Taishan” edition introduces five mandatory date‑time rules, two table‑alias SQL conventions, and a unified error‑code standard, all aimed at improving code consistency and reliability across backend projects.
This article explains Netty's channel pipeline lifecycle—including how the responsibility chain is created during channel initialization, how handlers are added and removed, and how the pipeline is torn down during channel closure—while providing detailed source‑code excerpts and diagrams to illustrate each step.
This article explains what Spring Boot application starters are, describes how they simplify adding modules like Tomcat and Redis through Maven dependencies, and provides a detailed list of all 44 available starters with their primary functions for backend Java development.
This article compiles a comprehensive set of PHP interview questions covering fundamentals, session and cookie handling, database transactions, MySQL optimization, version control tools, string manipulation, HTTP status codes, MVC concepts, and practical coding tasks with detailed answers and code examples.
This article walks through seven practical Laravel techniques—including view composers for reusable sidebars, route naming for maintainable URLs, dynamic key‑value settings, concise database query shortcuts, polymorphic relationships, caching best practices, and separating Redis connections—to help developers write cleaner, more scalable backend code.
Architecture patterns provide reusable solutions, and this article explains the Pipe‑Filter pattern—where data passes through independent filters like a production line, used in web frameworks, compilers, and serverless functions—and the Microkernel pattern, which separates a minimal core from plug‑in modules to enhance extensibility, maintainability, and configurability.
This article explains Java's ThreadLocal mechanism, shows how it provides thread‑confinement without synchronization, analyses its source code—including hash generation, internal ThreadLocalMap structure, set/get operations and resize logic—highlights potential memory‑leak pitfalls, and lists common application scenarios.
Discover the newly released Java Development Handbook (Taishan edition) featuring 34 new guidelines, solutions to Stream Collectors toMap pitfalls, unified error‑code design, leap‑year date bugs, SQL aliasing tricks, and code‑formatting tips, plus free download links and a chance to win prizes.
This cheat sheet introduces Composer, the PHP dependency manager, explains its purpose, and provides a concise list of essential Composer commands for creating projects, installing and updating packages, optimizing autoload files, self‑updating, requiring packages globally, and displaying package information.
This article provides a comprehensive overview of Laravel, covering its definition, advantages over other PHP frameworks, core components such as migrations, facades, service container, Eloquent models, events, query builder, route naming, closures, testing techniques, traits, autoloading, generators, and various PHP language features with practical code examples.
This guide explains how to replace per‑task Cron entries with Laravel's unified scheduler, showing how to configure a single Cron line, define schedules in app/Console/Kernel.php using closures, invokable objects, Artisan commands, queue jobs, shell commands, and how to fine‑tune frequency, time windows, environment, timezone, overlapping, single‑server execution, background processing, maintenance mode, output handling, hooks, and URL pings.
This article introduces the Hutool Java utility library, describes its main modules such as encryption, HTML handling, and cron scheduling, and provides practical code examples demonstrating how to use SecureUtil, HtmlUtil, and CronUtil to simplify backend development tasks.
This guide walks you through creating a simple PHP extension, from generating the skeleton with ext_skel.php to understanding each generated file—config.m4, config.w32, php_test.h, test.c, and tests—so you can confidently build and install your own extension.
This article shares practical techniques for handling date and time in Spring Boot projects, including the pitfalls of using SimpleDateFormat, the benefits of @JsonFormat, and two approaches to global configuration that streamline formatting for both java.util.Date and java.time types.
This article explains how Laravel Eloquent returns Collection objects, demonstrates iterating and chaining collection methods such as reject and map, lists the extensive base collection API, and shows how to create custom collections by overriding the newCollection method in a model.
A 2020 survey of 1,113 Node.js developers, conducted by Ecma members and led by Alibaba and Tencent, reveals demographic trends, preferred languages, frameworks, tools, deployment practices, learning habits, and future interests, providing a comprehensive snapshot of the Node.js ecosystem.
This guide explains how Laravel's paginator integrates with the query builder and Eloquent ORM, shows basic and simple pagination methods, demonstrates manual paginator creation, customizing URIs, appending parameters, converting results to JSON, and customizing pagination views, all with code examples compatible with Bootstrap.
This article provides an extensive Spring Boot tutorial covering its core concepts, annotations, configuration methods, security mechanisms, monitoring tools, third‑party integrations, deployment options, and common interview questions, offering Java developers a complete reference for building and maintaining modern backend applications.
Learn how Tomcat, the popular Java web server and servlet container, processes requests—from socket handling and URL dispatching to request/response encapsulation, servlet lifecycle, configuration, and startup—through a detailed 7‑step guide with illustrative code snippets and diagrams.
This article demonstrates step‑by‑step how to construct a clean and standardized backend API in Spring Boot by introducing required dependencies, using Validator for request parameter checks, applying global exception handling, defining custom exceptions, and implementing a unified response format for both success and error cases.
This article explains the best practices for using parameters and query strings in REST API design, covering pagination, parameterization concepts, HTTP methods, headers, caching, and authorization, and provides guidance on choosing the right approach to create efficient, stateless, and scalable APIs.
This article shows backend developers how to use PyCharm Professional’s integrated Database tool and HTTP Client to connect to MySQL, perform visual CRUD operations, and test RESTful APIs directly within the IDE, eliminating the need for separate tools like Navicat and Postman.
This guide walks you through installing Java 1.8, configuring Maven with Alibaba mirrors, setting up IDEA for Maven builds and Lombok, and installing VSCode with a collection of useful extensions to create a complete Java development workspace.
This article presents a practical guide to designing a usercenter module for API testing in Java, detailing a maintenance‑free data strategy, key automation principles, and a full code example that demonstrates user info retrieval, password modification, avatar upload, and feedback handling, with a Gitee repository link.
This article explains how to build a real‑time internet gold investment platform by outlining gold’s financial characteristics, identifying key participants, describing the three‑pillar system architecture, detailing buy, sell, withdraw and gift workflows, and presenting the necessary database tables for robust transaction and reconciliation management.
This article compiles sixteen practical Spring Boot best‑practice recommendations—ranging from custom BOM management and auto‑configuration to test slicing and externalized configuration—drawn from years of professional experience and expert insights, to help developers build cleaner, more maintainable micro‑service applications.
This tutorial walks through what Spring Boot Actuator is, how to quickly create a demo project, configure endpoint exposure, explore essential endpoints such as health, metrics, loggers, and shutdown, and secure them with Spring Security, providing code snippets and configuration examples.
This article explains the REST architectural style, its fundamental concepts, the most important HTTP methods, response‑code categories, the Richardson maturity model, description languages, popular server frameworks and client tools, while providing concrete examples and RFC references for building robust web APIs.
This article provides a detailed overview of common Spring Boot, Spring MVC, and JPA annotations—including their purposes, usage patterns, and code examples—helping developers understand how to configure, map, and manage beans, controllers, and persistence in Java backend applications.
This article explains how Nginx implements load balancing, covering algorithms like round-robin and IP hash, and provides a practical setup guide using Node.js and Nginx.
This article introduces how backend developers can leverage PyCharm Professional’s integrated Database tool and HTTP Client to manage databases and test RESTful APIs directly within the IDE, eliminating the need for separate tools like Navicat and Postman.
This article introduces JDK RMI, explains its role in distributed Java applications, provides complete Maven project examples for interface, server, and client implementations, and details the underlying registry, stub, skeleton, and export mechanisms that enable remote method calls.
Spring Framework 5.2.5 introduces over 50 bug fixes and enhancements, adds Java 14 support, and brings a host of new capabilities such as improved multipart handling, better Kotlin bean support, enhanced WebClient features, and performance optimizations for caches and proxies.
This article introduces FastAPI, a modern high‑performance Python web framework, walks through installation, basic routing, async handling, query and path parameters, data modeling with Pydantic, template rendering with Jinja2, and compares its speed to Flask, providing complete code examples and screenshots.
This guide outlines a comprehensive learning path for C and C++ covering essential language concepts, core computer science fundamentals, practical Linux development tools, and recommended resources to help beginners transition into backend development roles.
This article continues the mica-http guide, showcasing how version v1.1.7 introduces enhanced proxy handling, retry mechanisms, page crawling, model integration, and result processing, while providing documentation links, example projects, and open‑source tool recommendations for building lightweight Java crawlers.
Learn how to resolve performance bottlenecks in a Spring‑based mall project by caching user and permission data in Redis, adding cache logic with RedisTemplate, and using AOP to gracefully handle Redis failures, ensuring stable authentication even when the cache is unavailable.
This article explains how permission control is re‑designed for front‑end/back‑end separated applications, defining resources and permissions, outlining the distinct responsibilities of front‑end routing and component rendering versus back‑end API validation, and providing practical implementation examples in React and Java.
This article explains how Spring applies nine classic design patterns—including Simple Factory, Factory Method, Singleton, Adapter, Decorator, Proxy, Observer, Strategy, and Template Method—detailing their implementation approaches, underlying principles, and the benefits they bring to Spring's IoC container and AOP mechanisms.
This tutorial provides a comprehensive introduction to Node.js, covering its runtime environment, core global objects, module system, command‑line interface development, npm package management, script automation, and event handling with practical code examples and explanations for front‑end engineers transitioning to back‑end development.
This article explains how the FanLibrary testing framework provides overloaded methods to create HttpGet and HttpPost objects, supporting JSON, form, and multipart file uploads, with detailed Java code examples and guidance on parameter handling and URL encoding.
