The article discusses the design of a job scheduling system emphasizing high availability over high concurrency, utilizing CronExpression parsing for task triggers and implementing flexible configurations to meet diverse business needs.
The article describes how to build a Go‑based backend for a WeChat lottery mini‑program using the Echo framework, Tencent Cloud load balancer, Nginx, Redis and MySQL, detailing the system architecture, API design, database and Redis integration, WeChat login flow, activity state machine, and lessons learned.
This article provides a comprehensive analysis of Java's ThreadPoolExecutor source code, covering class relationships, core interfaces, abstract implementations, internal fields, constructors, the Worker class, and detailed walkthroughs of key methods such as execute, addWorker, runWorker, getTask, processWorkerExit, tryTerminate, and idle thread interruption, plus monitoring techniques.
This article explains how to use Aspect‑Oriented Programming (AOP) in Java backend controllers by defining a unified ResultBean response format, outlining controller coding conventions, and providing complete Java and XML examples for logging, exception handling, and AOP configuration.
This article walks through the Spring MVC internals, explaining how the @ResponseBody annotation triggers JSON serialization by tracing the DispatcherServlet, HandlerAdapters, and ReturnValueHandlers, and includes runnable Spring Boot test code to illustrate the processing flow.
The article chronicles Elastic’s journey from a small open‑source search tool to a NYSE‑listed company, explaining Elasticsearch’s technical foundations, its real‑world applications, and what the IPO means for developers and the broader search‑technology ecosystem.
The article reviews three high‑star Java interview projects on GitHub—interviews, Java‑Interview, and JavaGuide—detailing their coverage of coding practice, data structures, algorithms, and system design, along with star/fork statistics and direct repository links to help developers prepare for technical interviews.
This article provides a comprehensive overview of Nginx, covering its high‑performance features, modular architecture, proxy capabilities, event‑driven model, multi‑process and asynchronous processing mechanisms, and how these components work together to deliver scalable web services.
This article provides a step‑by‑step guide to creating a Spring Boot application, generating a project template, adding a MyBatis‑based persistence layer, implementing service and controller layers, configuring the database, and running the application to expose REST endpoints.
The author shares a candid account of transitioning from an electronics engineering undergraduate to a Java backend developer, detailing study strategies, internship experiences, interview preparations, and lessons learned during multiple campus recruitment cycles at top tech companies.
This article explains how to use feature toggles in .NET Core to hide or gradually release functionality, covering built‑in toggle types, open‑source libraries, configuration via appsettings, custom toggle creation, and step‑by‑step code examples for practical implementation.
The article explains how Node.js now supports native V8 code‑coverage via the NODE_V8_COVERAGE environment variable, describes the limitations of traditional tools like Istanbul, outlines the benefits and challenges of using V8’s built‑in coverage, and provides practical steps and tools (c8, v8-to-istanbul) to generate readable coverage reports.
This article explains how to build a lightweight Tomcat-inspired web server called MyTomcat, covering its socket service, request dispatching, HTTP request/response encapsulation, servlet mapping, and demonstrates the complete project structure with illustrative diagrams and code snippets.
This article explains what RPC is, compares it with SOA, SOAP, and REST, outlines the step‑by‑step RPC execution process, and introduces several mainstream RPC frameworks such as RMI, Hessian, protobuf‑rpc‑pro, Thrift, Avro, and Dubbo.
The article examines the common pain points of mini‑program backend development—knowledge overload, high cost, and integration complexity—then explains how serverless architecture and Tencent Cloud's cloud development platform address these issues, offering faster, cheaper, and more scalable solutions with practical implementation guidance.
This article presents a comprehensive Git branching model designed for large-scale dual‑mode development, details naming conventions, granularity rules, code picking methods, shallow clone and sparse checkout techniques, and demonstrates its successful application in the Agricultural Bank's C3 credit management system while also announcing a related DevOps live event.
This tutorial walks you through the background, learning goals, and detailed Spring-based code examples of the Strategy pattern, including list and map implementations, configuration files, and a complete run‑time demonstration for Java developers.
The iQIYI video backend team outlines their microservice journey, detailing service decomposition strategies, choosing Spring Cloud for its low migration cost and rich ecosystem, and building a shared platform of registries, configuration, gateways, monitoring, and CI/CD to boost efficiency, reliability, and scalability while planning future adoption of service mesh and domain‑driven design.
This article explains the fundamental principles of web caching, how Nginx leverages the locality of reference to store local copies of responses, the 404‑error and resource‑missing driven caching mechanisms, and the proxy‑store and memcached based approaches, highlighting their benefits and limitations.
This article provides a comprehensive, question‑driven guide to Spring Boot, covering its differences from Spring and Spring MVC, auto‑configuration, starter projects, embedded servers, Maven plugins, DevTools, static resources, Spring Data, REST support, request mapping nuances, and profile‑based configuration for building production‑ready Java backend applications.
This article explains how Spring MVC uses @RequestBody to deserialize JSON request bodies into Java objects and @ResponseBody to serialize Java objects back to JSON, providing clear code examples, curl testing, and notes on @RestController behavior.
This article presents a comprehensive overview of Alipay’s system architecture, detailing its core components such as payment processing, accounting, settlement, and transaction modules, and introduces the open‑source Java‑based distributed messaging middleware Metamorphosis (MetaQ), highlighting its features, advantages over Kafka, and suitable use cases.
This article explains the RESTful architectural style, detailing its core constraints such as resource identification, representation, stateless state transfer, and the uniform interface, and compares REST with RPC while outlining Java frameworks and multi‑layer designs for building scalable backend web services.
This article presents a step‑by‑step migration plan from ActiveMQ to Kafka, covering system dependencies, message type classifications, VirtualTopic usage, and concrete strategies for consumer, producer (1‑1, 1‑N) and self‑consume scenarios to ensure a smooth, zero‑downtime transition.
This article demonstrates how to build an HTTP/2 server and client in Go, covering TLS certificate generation, server and client implementations, switching between HTTP/1.1 and HTTP/2, server‑push handling, and full‑duplex echo communication with complete code examples.
This article explains the fundamentals of Remote Procedure Call (RPC), covering its definition, architectural components, communication protocols, serialization process, complete call workflow, and the main technologies and frameworks used in modern backend systems.
This guide outlines a step‑by‑step method for newcomers to quickly grasp an organization’s entire project ecosystem—identifying source code locations, deployment environments, mapping front‑end pages to back‑end services and databases, and organizing key tables and controller interfaces for long‑term success.
This guide introduces Lua’s concise syntax, tiny footprint, and performance strengths, explores typical use cases such as security, web APIs, and game servers, then walks through core language features, OpenResty integration, deployment steps, and a hands‑on exercise for building a redirect service.
This article walks readers through the complete process of creating an IntelliJ IDEA plugin—from installing the SDK and setting up a project, to defining actions, handling UI threads, using background tasks, and exploring core concepts such as VFS and PSI—providing practical code examples and references for further learning.
This article provides a detailed introduction to NestJS, a progressive Node.js framework, covering its modular design, core building blocks such as controllers, providers, and modules, and demonstrating how to implement middleware, pipes, guards, interceptors, and exception filters with practical TypeScript code examples and project structure recommendations.
This article provides a thorough overview of Java task scheduling, covering the native Timer utility, the thread‑pool‑based ScheduledExecutorService, and the powerful Quartz framework, including their APIs, usage patterns, limitations, and integration with Spring for enterprise applications.
This article outlines what senior Java interviewers at top internet companies ask, how to prepare for the two interview stages, and provides a detailed learning roadmap—from Java fundamentals to advanced JVM, concurrency, and career‑building strategies—for developers at any experience level.
This comprehensive guide outlines the essential technical and soft‑skill roadmap for programmers, covering computer fundamentals, data structures, Java basics, multithreading, JVM internals, databases, distributed systems, architecture, learning methods, personal branding, English importance, and ways to stay competitive.
This article explains how to monitor Redis memory usage with the INFO command, interprets key metrics such as used_memory, used_memory_rss, and mem_fragmentation_ratio, and dives into Redis's internal memory layout, including allocators, redisObject, SDS, and the various object types and their encodings.
This article outlines the expected work experience, job responsibilities, and technical skill requirements for Java engineers at junior (1‑3 years), mid‑level (3‑5 years), and senior (5‑8+ years) stages, summarizing the competencies needed to progress from basic development to architectural design.
This article explains Tomcat’s overall architecture, detailing the relationships among Server, Service, Connector, and Container, and describes how requests flow through ProtocolHandlers, Pipelines, and Valves to reach servlets and return responses.
Xianyu introduced a lightweight data‑aggregation service and adopted Alibaba’s TQL GraphQL gateway, allowing front‑ends to fetch multiple domain data in a single request, which cut development costs by over 50%, reduced latency, and accelerated page composition across more than 30 pages.
GraphQL, created by Facebook in 2012 and open‑sourced in 2015, offers a flexible, efficient alternative to REST by allowing clients to request exactly the data they need, reducing redundancy, cutting request counts, and simplifying API evolution, with practical Node server and Apollo client implementations illustrated.
This article outlines the progressive evolution of system architecture—from a single‑server LAMP setup through service and data separation, caching, clustering, read/write splitting, CDN, distributed storage, NoSQL, business decomposition, and finally distributed services with messaging, service frameworks, and governance—highlighting the motivations, characteristics, and challenges at each stage.
This article explains how Flask uses Jinja2 templates, covering template rendering, variable syntax, built‑in filters, inheritance, and demonstrates a complete schedule‑management example with CRUD operations, DataTables integration, and AJAX calls.
This article presents sixteen practical Spring Boot best‑practice recommendations—ranging from custom BOM dependency management and starter usage to clean controller design, service layering, externalized configuration, testing strategies, and logging—to help developers build maintainable, production‑grade Java micro‑services.
This article explains how to use Charles Proxy's Map Remote, Map Local, and Rewrite features to alter server responses for client testing, mock data, pagination, and special data handling, providing step-by-step instructions with screenshots for redirecting requests to other URLs, local files, or applying regex replacements.
This article explains how browsers handle CORS by distinguishing simple and non‑simple requests, the conditions that trigger a preflight OPTIONS request, the required Access‑Control response headers, and how server‑side implementations—such as Java interceptors—manage these interactions.
This article explains the concept of Inversion of Control (IoC), illustrates its implementation through a simple MVC library example, compares library versus framework approaches, and discusses how IoC enables flow control reversal, extensibility, and customization within backend application development.
This article analyzes common disagreements in designing an order status field for e‑commerce systems, explores business state modeling, evaluates dictionary representations, recommends using varchar2 with a separate dictionary table, and provides a comprehensive set of status values and their handling guidelines.
The article shares a developer's journey toward becoming a Java architect, highlighting common pitfalls such as over‑focusing on code, getting lost in component details, and neglecting reusability, while offering practical advice on mastering high‑concurrency architectures, component integration, and design patterns.
This tutorial walks you through configuring Django templates, static files, middleware, and MySQL database settings, then defines models for publishers, books, and authors, implements CRUD views and URL routing, and creates the necessary front‑end templates to build a complete library management application.
Spring Boot, introduced in 2013 to simplify Spring development, provides out‑of‑the‑box starter dependencies, reduces configuration and deployment complexity, and enables rapid creation of microservice‑ready Java applications, making it essential knowledge for modern backend developers.
Jason Fried’s multi‑year effort to migrate Facebook’s massive codebase from Python 2.7 to Python 3 illustrates the technical, cultural, and organizational challenges of large‑scale language adoption and the concrete strategies that finally made Python 3 the default at the company.
This guide explains the nine HTTP methods, highlights the five most common ones for RESTful APIs, outlines essential API design principles, and details proper usage of HTTP status codes and error responses to build robust, maintainable backend services.
This article walks through creating a generic song‑parsing framework using Java's Service Provider Interface (SPI), showing the evolution from a hard‑coded parser to a modular, plug‑in architecture that supports adding new formats like MP3, MP4, and RMVB without changing core code.
This article explains the core concepts of distributed architecture, including cohesion and transparency, explores common applications such as distributed file systems, caches, databases, and middleware like MyCat, and outlines the evolutionary stages and challenges of building scalable distributed systems.
This article outlines practical techniques for enhancing Java service robustness, covering standardized response structures, thorough parameter validation, retry strategies, idempotent design, and functional programming with lambdas to reduce runtime errors and improve maintainability.
This article explains how a JavaEE project integrates JSP front‑end with Struts2, Spring, and MyBatis on the backend, describes the three‑tier architecture, the role of each layer, database communication with Oracle, and the evolution from classic MVC to Web 2.0 approaches.
This article explains what data streams are, how they differ from arrays, the types of streams in Node.js, demonstrates Java Stream operations, and introduces popular streaming platforms like Apache Kafka and Amazon Kinesis, highlighting their core features and real‑time processing capabilities.
This article outlines the critical knowledge points for backend developers, covering source code analysis, distributed systems, microservice architecture, performance tuning, Java engineering practices, and comprehensive concurrency programming techniques.
This article introduces five essential Laravel helper functions—data_get, str_plural, route, abort_if, and optional—explaining their usage with code examples, default values, wildcard support, URL generation, conditional exception handling, and safe property access to streamline backend development.
This article describes the background, analysis, solution selection, architecture redesign, execution steps, and results of a large‑scale order table splitting project that separates hot and cold data, applies horizontal sharding, and uses MySQL partitioning to control table size and boost query performance.
This article explains how to design and implement robust Java exception handling for business systems using Spring MVC, covering when to create custom exceptions, how to structure service and controller code, and how to centralize error responses with @ControllerAdvice for clean, maintainable backend development.
This article explains Node.js's internal architecture—including the standard library, bindings, V8 engine, libuv I/O library, code structure, event loop, and concurrency model—providing a comprehensive overview for developers who want to master backend development with Node.
This article introduces message queue middleware, explains its role in distributed systems for asynchronous processing, system decoupling, traffic shaping, log handling and message communication, and provides concrete e‑commerce and log‑collection examples illustrating how queues improve performance, scalability and reliability.
The June 2018 Ceph Developer Monthly Report reviews key changes such as the deprecation of ceph‑disk, the upcoming seastar‑based OSD, SMART‑driven disk‑failure prediction, new rbd namespace support, BlueStore memory optimizations, iWARP RDMA support, and several operational enhancements.
This article traces Spring's evolution, explains why Spring Boot was created to simplify configuration and deployment, outlines its core features, testing support, convention‑over‑configuration philosophy, and its relationship with Spring Cloud, providing a comprehensive guide for backend developers.
This article explains Spring Boot's core features, the role of @Conditional in automatic configuration, demonstrates custom condition classes and annotations, and walks through the source code of Spring Boot's auto‑configuration infrastructure, including @SpringBootApplication, EnableAutoConfigurationImportSelector, and class‑path condition evaluation.
This guide introduces Elasticsearch 6.3's native SQL support, demonstrates how to bulk‑load sample books, run SQL queries, apply ordering, limits, combine filters, translate SQL to ES DSL, and use the built‑in SQL client, providing a practical walkthrough for developers.
This article explores the origins of Spring Boot, its evolution from the Spring framework, key features, advantages for developers, and its relationship with Spring Cloud, illustrating how it simplifies Java backend development and addresses configuration complexity.
This article provides a detailed tutorial for creating a Spring Boot project with MyBatis, including environment setup, Maven dependencies, configuration files, database creation, MyBatis generator usage, and sample controller, service, and mapper code, enabling pagination with PageHelper and testing via HTTP requests.
This eight‑day tutorial introduces how to quickly set up a Django‑based backend administration system, covering required dependencies, installation commands, project creation, server launch, and verification steps, encouraging readers to practice each day and eventually build an automated front‑end data entry platform.
This article explains Kafka's role as a distributed message queue, covering its architecture, replication mechanisms, producer‑consumer workflow, message integrity guarantees, schema management, and performance tuning for high‑throughput, low‑latency backend systems.
This tutorial demonstrates how to quickly build a modern Java web application using Spring Boot, integrate MyBatis as the ORM, configure Redis as a second‑level cache, and write unit tests with H2, providing step‑by‑step code and configuration details for backend developers.
This article explains why high‑traffic scenarios like flash‑sale systems need rate limiting, compares token‑bucket and leaky‑bucket algorithms, and shows practical configurations for Tomcat, Nginx, and OpenResty to protect APIs and ensure system stability.
This article shares practical Java backend engineering advice—including module layout, code‑level conventions, SQL execution‑plan understanding, index usage, transaction handling, connection‑pool tuning—as well as personal work‑habit reflections and career‑development suggestions for developers.
Learn how to enhance PHP code quality by implementing unit tests using PHPSpec and PHPUnit, covering SOLID principles, mock objects, test setup, code coverage integration, and best practices for writing maintainable, reliable backend code.
This article explains a practical approach for managing common C source files shared by several applications by placing the shared code in a dedicated folder and using a Makefile that automatically discovers, compiles, and links both the common and application‑specific files, reducing redundancy and simplifying maintenance.
The article outlines the key characteristics of large-scale websites and traces their architectural evolution from single‑server setups to multi‑tier, cache‑enhanced, clustered, and distributed systems, highlighting strategies such as load balancing, database read/write separation, CDN usage, NoSQL adoption, and service‑oriented decomposition.
This guide outlines a complete Java learning path covering computer fundamentals, core Java concepts, JVM internals, database basics, design patterns, HTTP protocol, Spring framework, and advanced backend topics such as web services, distributed systems, and Hadoop.
This article provides a step‑by‑step tutorial on building a simple ThinkJS + Vue2 project with separate user and admin pages, covering directory layout, proxy setup, multi‑page webpack configuration, server routing, API creation, adding new pages, and production build deployment.
This comprehensive guide covers essential software development principles, processes, daily tools, runtime environments, third‑party services, data handling, Java language and JVM intricacies, system architecture evolution, and a typical deployment stack for building robust backend applications.
The article recounts Youzan’s transition from a Koa‑based internal system to the Astroboy framework—first version for decoupling code, then Astroboy 2.0 built on Koa2 with a customizable upper‑layer Base Framework, extensible plugins, and a Go‑based Tether proxy that streamlines Node‑to‑Java service integration and improves performance.
On May 17, 2018, Alibaba became the sole Chinese representative on the Java Community Process (JCP) Executive Committee, giving China a voice in shaping global Java standards, highlighting its extensive Java deployment across e‑commerce, finance, and logistics, and its open‑source contributions like AlibabaJDK, Dubbo, and RocketMQ.
This article outlines the fundamental Java SE concepts, servlet and JSP basics, HTML/JavaScript essentials, and the core SSH frameworks (Struts2, Spring, Hibernate) while providing interview questions and guidance on project modeling, design, and implementation for enterprise-level development.
This article introduces Lombok—a Java library that eliminates boilerplate code—by showing how to install it in IntelliJ, demonstrating the most common annotations with runnable examples, and revealing the annotation‑processing mechanism that generates the bytecode during compilation.
Learn how to set up a personal WeChat public account, configure a public platform test server on Alibaba Cloud, verify messages via Python and Tornado, and implement basic text, image, and QR‑code interactions using the official WeChat API, complete with code snippets and configuration details.
The guide by Tencent Cloud’s Huang Wenjun explains how to replace traditional servers with a serverless stack—API Gateway, cloud functions, and cloud database—to build scalable, low‑maintenance WeChat mini‑program backends, detailing login flow, billing, advantages, and common limitations.
This article compares placing business logic in SQL versus Java by presenting a concrete student‑score example, evaluating development speed, debugging, scalability, and maintenance, and concludes with recommendations for when each approach is appropriate.
This article explains how to design and implement a lightweight rule engine using condition‑based rules and a simple database schema, illustrated with a medical prescription recommendation example, and includes Java code that evaluates logical expressions to determine when to display results.
This article compiles and translates key information about HikariCP, detailing why Spring Boot 2 adopts it as the default JDBC pool, comparing its performance and stability against BoneCP, C3P0, Tomcat and Druid, and providing practical configuration steps for quick integration.
This article presents a concise Python example that demonstrates how to compose and send an email with a text body and a file attachment via the smtplib library, including MIME construction, encoding, and SMTP authentication steps.
This article explains how Spring Boot allows external configuration through various sources such as command‑line arguments, JNDI, system properties, environment variables, random values, property files, @PropertySource, and default properties, detailing their priority order and usage examples with code snippets.
This article shares practical techniques for writing and maintaining large numbers of automated API test cases in a Java Spring/Dubbo environment, covering faster execution by limiting service initialization, a three‑step test structure, data‑provider and factory optimizations, resource cleanup strategies, and stability improvements for CI pipelines.
This article explains Dubbo’s core RPC principles, architecture layers, design philosophy, open‑source growth, adoption by major enterprises, and upcoming plans for modularization, metadata, async support, and its progression through the Apache Incubator toward becoming a top‑level project.
This guide explains how to find QQ mail's POP3/SMTP server settings, enable the SMTP service in the QQ account, and provides a complete Python script that uses smtplib to send an email through QQ's SMTP server.
This comprehensive guide outlines a step‑by‑step roadmap for becoming a modern backend developer, covering language selection, hands‑on practice, package management, standards, security, testing, databases, frameworks, caching, APIs, authentication, messaging, Docker, web servers, sockets, GraphQL, and continuous learning.
This article presents a comprehensive, step‑by‑step roadmap for aspiring backend developers, covering language selection, tooling, best practices, security, databases, frameworks, testing, deployment, and continuous learning to help readers confidently master modern backend development.
This article analyzes the pain points of traditional operation‑backend development, proposes a cloud‑based generation platform that automates UI, database, and API creation, outlines its architecture and workflow, and shows how it reduces development cycles from days to minutes while standardizing style and resource usage.
This article provides a comprehensive introduction to essential Java backend technologies—including Spring MVC, Spring IoC/AOP, MyBatis, Dubbo, Maven, RabbitMQ, Log4j, Ehcache, Redis, Shiro—and outlines basic design‑pattern concepts, helping developers understand their roles, core mechanisms, and practical usage.
This article provides a comprehensive guide to installing and utilizing the Python-Jenkins library for automating build processes, retrieving job information, and managing continuous integration workflows through Jenkins server interactions.
This article offers comprehensive advice for recent graduates and junior programmers on gaining commercial project experience, setting clear career goals, mastering essential Java Core, Java Web, and database concepts, and presenting those skills effectively in resumes and interviews to increase hiring chances.
This article explains how to implement a shopping cart in Java by handling four login scenarios, defining BuyerCart and BuyerItem beans, using JavaScript and Spring MVC controllers to add items, persisting cart data in cookies or Redis, converting objects to JSON with ObjectMapper, managing sessions, and validating stock before checkout.
At GopherChina 2018, Didi engineer Shi Songran explained how Go powers the company’s high‑availability order, dispatch, and storage systems, detailing service‑governance practices, two production‑level bugs, and Didi’s open‑source contributions of the gendry database helper and the high‑performance json‑iterator codec.
