Switchquery is a high‑performance mobile configuration delivery platform that achieves second‑level real‑time updates through a novel header‑based versioning scheme, eliminating push notifications and long‑lived connections while supporting Android, iOS, and hybrid clients with low cost and high reliability.
This article shares fourteen practical Java backend development habits—including using @ConfigurationProperties, replacing @Autowired with @RequiredArgsConstructor, modularizing code, throwing exceptions instead of returning error flags, minimizing unnecessary database calls, avoiding null returns, reducing if‑else chains, and leveraging IDE features—to help developers write cleaner, more robust, and easier‑to‑maintain code.
This article explains why MQ middleware like Kafka is introduced for system decoupling and traffic control, outlines the three key challenges of message loss detection, loss points, and prevention, and provides detailed configurations, monitoring tips, and code examples to ensure reliable, loss‑free message delivery.
This tutorial shows how to enable Nginx's stub_status module, install the Nginx Prometheus Exporter, configure Prometheus to scrape Nginx metrics, and visualize the data in Grafana, providing a complete end‑to‑end monitoring solution.
This article explains why message duplication occurs in Kafka, describes the three delivery semantics, and provides practical solutions—including idempotent producers, transactions, and consumer-side idempotence—along with configuration tips and code examples to achieve exactly‑once delivery.
This article explains why Apollo configuration stops working after switching from @Value to @FeignClient in a Spring Boot project, analyzes the loading order of Spring's configuration mechanisms, and shows how to adjust the bootstrap settings to resolve the issue.
This article provides a comprehensive overview of Spring Boot and related Spring annotations, explaining their purposes, usage patterns, and code examples, helping developers master configuration, component scanning, conditional bean registration, and core Spring Boot features for efficient backend development.
nginxWebUI provides a graphical interface for configuring and managing Nginx, supporting HTTP/TCP forwarding, reverse proxy, load balancing, SSL automation, multi‑server clustering, Docker deployment, systemd startup, and detailed usage instructions, enabling administrators to generate and control nginx.conf without manual coding.
This article explains how to adopt Vite in a Vue 2.x codebase, covering dependency installation, process and global polyfills, path‑alias handling, sass loader conflicts, template adjustments, and performance comparisons, while providing concrete configuration snippets for a smooth migration.
This article introduces the open‑source sync‑diff‑inspector tool, explains how to download and install it, and provides detailed configuration and command‑line examples for schema‑level, table‑level, and range‑based data validation between MySQL instances, including automatic SQL repair generation and common troubleshooting tips.
This step‑by‑step guide shows how to install the GeoIP2 library, upgrade Nginx, compile the ngx_http_geoip2 module, download the MaxMind GeoLite2 database, configure nginx.conf to detect non‑Chinese IPs, and return a 404 response to block foreign visitors.
This article explains how to securely mask sensitive data in log output by using either a conversionRule tag with MessageConverter or a custom utility class, and provides a step‑by‑step guide to integrate a reusable Logback desensitization component with Maven dependency, appender replacement, and YAML configuration.
This article provides a comprehensive, hands‑on tutorial for configuring Alibaba Canal and its client‑adapter to capture MySQL binlog changes and synchronize them into Elasticsearch, covering environment setup, Docker commands, YAML configuration files, index mapping, adapter startup, and common troubleshooting scenarios.
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 compares Vim and its modern fork Neovim, highlighting seven practical advantages such as better project maintenance, built‑in LSP support, more flexible plugins, parallel startup, embeddability, standardized configuration locations, and performance optimizations that make Neovim a preferred editor for many developers.
This article provides an in‑depth tutorial on Nginx, covering installation on Linux, core configuration directives, server name and location matching, reverse proxy setup, various load‑balancing algorithms, caching strategies, HTTPS setup, CORS handling, gzip compression, and an overview of Nginx's process architecture and module system.
This guide explains why the Alertmanager configuration file in a TiDB cluster is repeatedly overwritten during reloads, analyzes error logs and TiUP documentation, and provides step‑by‑step instructions to edit the topology, set a custom config file, reload the service, and verify the fix.
This guide walks through installing Supervisor from source, resolving dependencies, creating configuration files, defining custom program entries, starting the service, reloading configurations, and using supervisorctl to monitor and control processes on a Linux server.
Nacos 2.2.0, the latest GA release of the dynamic service discovery and configuration platform, removes legacy code, adds several new plugins, expands feature support, refactors core components, and resolves numerous bugs and dependency issues for more stable cloud‑native operations.
This article introduces nginxWebUI, a web‑based graphical interface for managing Nginx configurations, explains its technical architecture, provides step‑by‑step installation instructions for jar, Docker and systemd service on Linux, and demonstrates how to use the UI for HTTP, TCP, SSL, load‑balancing, and remote server management.
This article explains the Chain of Responsibility design pattern, demonstrates its implementation with Spring‑managed handlers for product creation validation and expense‑approval workflows, shows how to configure and dynamically compose handlers via JSON, and provides complete Java code examples and diagrams.
This article explains MySQL 5.7’s enhanced multi‑threaded slave (MTS) parallel replication, contrasting it with the schema‑based approach of MySQL 5.6, detailing its group‑commit mechanism, configuration parameters, GTID handling, performance testing, and practical tuning tips for optimal replication throughput.
This guide provides a comprehensive walkthrough of nginxWebUI—a graphical web interface for configuring and controlling Nginx—including feature overview, installation via JAR or Docker, systemd service setup, command‑line options, SSL automation, backup management, API usage, and password recovery.
This article explains why ZooKeeper can run out of disk space due to excessive snapshots and transaction logs, describes the underlying file‑generation mechanism, and provides concrete configuration parameters and best‑practice recommendations to control file growth and keep the cluster stable.
This article presents a step‑by‑step practice of migrating massive billing data to 32 sharded databases with Sharding‑Proxy, covering background, objectives, four migration solutions, detailed proxy installation and configuration, debugging, migration workflow, data validation, common issues and their resolutions.
This article explains how to replace Zabbix with Prometheus for MySQL monitoring by configuring mysqld_exporter to collect metrics from multiple MySQL instances, details the required user accounts, shows common errors, and provides step‑by‑step solutions including building a newer exporter, adjusting configuration files, and using auth_module for password management.
This guide compiles twelve practical Vim techniques—from accessing built‑in help and saving files with sudo to converting tabs and spaces, managing indentation, preserving paste formatting, enabling spell checking, displaying mixed line numbers, previewing diffs, opening files at a specific line, and using efficient delete shortcuts—each illustrated with commands and screenshots.
This article shares practical Python tips for using PyYAML safely, preserving key order, customizing list indentation, outputting readable Unicode, and introduces alternative YAML libraries like oyaml, strictyaml, and ruamel.yaml for better configuration handling.
This article provides a practical guide to essential Vite configuration options—including CSS preprocessor settings, PostCSS plugins, path aliases, server host and proxy, build output directories, and plugin usage—offering concise code examples to help frontend developers quickly set up and optimize Vite projects.
This article explains how to securely encrypt sensitive Spring Boot configuration properties such as database passwords using the Jasypt library, covering dependency setup, YAML configuration, encryption/decryption testing, custom encryptors, property detectors, resolvers, filters, and Maven plugin usage, all with practical code examples.
The article explains Taobao’s Atmosphere visual marketing system, detailing the need for an Atmosphere Center, its three‑tier architecture with dual configuration portals, Diamond‑based synchronization, abstract handler classes for CRUD operations, and future plans to consolidate portals and streamline custom logic.
This article explains why ECharts is a popular choice for large‑screen dashboards, introduces the configuration‑driven mindset, demonstrates graphic and animation techniques, and walks through building a reusable Vue 3 base component with dynamic resizing, theming, and empty‑state handling.
This article describes how to replace Zabbix with Prometheus for MySQL monitoring by configuring mysqld_exporter to collect metrics from multiple MySQL instances, including environment setup, user creation, exporter configuration, troubleshooting common errors, and Prometheus job adjustments, providing step‑by‑step commands and code examples.
This guide clarifies the differences between editors, compilers, and debuggers, then dives into Vim’s core concepts—modes, common commands for insertion, navigation, deletion, copying, searching, and substitution—plus advanced tricks, shortcut mappings, and essential .vimrc configurations to boost productivity.
This guide introduces Caddy 2, an enterprise‑grade Go‑based web server, outlines its key features and advantages over Nginx, provides step‑by‑step installation commands for various Linux distributions and macOS, and demonstrates comprehensive Caddyfile configurations including site blocks, global options, logging, TLS, reverse proxy, and modular snippets.
This tutorial explains how Spring Boot handles logging with Commons Logging, demonstrates using SLF4J as a facade, shows a complete code example, and covers configuring log output, levels, color, file rotation, and custom patterns for effective backend logging.
This comprehensive guide explains what Nginx is, its advantages, deployment scenarios, request processing, high‑concurrency mechanisms, proxy types, directory layout, configuration directives, cookie vs session, threading model, load‑balancing algorithms, rate limiting, health checks, compression, and practical examples for building robust, scalable web services.
This article provides a comprehensive guide to Redis persistence, covering the theory and configuration of both RDB snapshotting and AOF append‑only logging, their advantages, drawbacks, practical setup commands, recovery procedures, and performance‑tuning tips for reliable data durability.
This article explains how to achieve load balancing using Nginx, covering the concepts of hardware and software load balancers, various Nginx balancing algorithms with configuration examples, and a step‑by‑step guide to integrate Nginx with a SpringBoot application, test it, and handle common pitfalls.
This article provides an in-depth overview of Nginx, covering its core concepts, advantages, request handling, load balancing strategies, reverse proxy, static and dynamic resource separation, security, rate limiting, health checks, compression, and practical configuration examples for high‑performance web services.
This guide introduces Vim’s core concepts, modes, essential commands for inserting, navigating, deleting, copying, searching, and saving files, plus advanced tips such as command output insertion, range commenting, custom shortcuts, and a simple .vimrc configuration to boost coding efficiency.
The article traces the evolution of the unified build‑scripts scaffold—from a basic webpack project to an npm‑packaged, plugin‑driven system that merges user‑defined build.json settings, leverages webpack‑chain for chainable configuration, and finally supports multiple named tasks, demonstrating a flexible architecture for modern frontend development.
This comprehensive guide explains how to configure Nginx as an HTTP server, static file server, reverse proxy, and load balancer, covering directory setup, location matching rules, priority order, upstream strategies, and useful directives such as return, rewrite, error_page, logging and access control.
This article analyzes the risks and inefficiencies of using a traditional JSON‑based configuration center, explores previous mitigation approaches, and presents a standardized, automated, and immersive solution that fully replaces Apollo configuration with zero production errors in a large‑scale e‑commerce environment.
This guide explains Nginx load balancing concepts, compares hardware and software approaches, details various balancing algorithms with configuration examples, and shows how to integrate Nginx with SpringBoot for practical load‑balancing tests and deployment tips.
This article explains six common techniques for adding beans to the Spring IoC container, including @Configuration with @Bean, @Component with @ComponentScan, various @Import approaches, FactoryBean, and BeanDefinitionRegistryPostProcessor, providing code examples and usage details for each method.
This article introduces Nginx as a high‑performance web and reverse‑proxy server, explains its key features, walks through installation and startup steps, details the main nginx.conf sections, and demonstrates practical configurations for reverse proxy, load balancing, and static‑dynamic separation.
Explore the 11 most commonly used Spring extension points—from custom interceptors and bean factories to global exception handling, type converters, import mechanisms, startup runners, bean lifecycle processors, and custom scopes—complete with clear code examples and practical guidance for enhancing Java backend applications.
This article explains how Nginx can be used to achieve various load‑balancing strategies—including round‑robin, least connections, IP hash, generic hash, random and least‑time—provides concrete upstream and server configuration examples, shows how to integrate Nginx with a Spring Boot application, and details testing procedures to verify balanced request distribution.
This article provides a step‑by‑step tutorial on using Spring annotations for bean definition, component scanning, scope management, autowiring, qualifier usage, simple value injection, property file loading, and finally demonstrates how to integrate Spring with MyBatis for streamlined data access in Java backend projects.
This article provides a detailed overview of Nginx, covering its lightweight architecture, high‑concurrency event‑driven model, common use cases such as static file serving, reverse proxy and load balancing, step‑by‑step configuration examples, and advanced topics like rate limiting, health checks, gzip compression, and high‑availability deployment.
This article explains five different techniques for adding beans to the Spring IoC container—including @Configuration + @Bean, @ComponentScan, @Import with various selectors, FactoryBean, and BeanDefinitionRegistryPostProcessor—providing complete code examples and practical usage notes for developers.
Spring Cloud Tencent 1.7 introduces support for Spring Cloud Hoxton, 2020, and 2021, provides a detailed version list and numbering scheme, and adds major features such as service governance plugins, dynamic configuration improvements, monitoring enhancements, and extended Polaris integration, with links to documentation and repositories.
This article explains how to bundle a default configuration file into a Rust binary using the rust-embed crate, load it at runtime, and override it with a user‑provided file placed alongside the executable.
This article explains how to integrate Logback with SLF4J in Spring Boot, covering dependency setup, default and custom configurations via logback‑spring.xml, detailed element descriptions, and best‑practice logging code examples, including file rolling policies and performance considerations.
This article explains Redis 6.0's shift from a single‑threaded network model to threaded I/O, outlines the performance reasons behind the change, describes the new execution flow, and provides step‑by‑step instructions for configuring multithreading in redis.conf.
This article provides a comprehensive tutorial on installing and configuring the MySQL Orchestrator high‑availability tool, covering required host environments, software download, extraction, backend MySQL user setup, configuration file editing, service startup, and web UI access.
This article explains why introducing a message queue like Kafka helps decouple systems and control traffic, then dives into the three key questions of detecting, locating, and preventing message loss, offering concrete monitoring methods, configuration settings, and troubleshooting steps for producers, brokers, and consumers.
This article provides a comprehensive guide to DevStream, an open‑source DevOps toolchain manager, covering its core concepts, configuration files, installation steps, basic commands, plugin development, and a practical example that demonstrates initializing and applying a full CI/CD pipeline on Kubernetes with ArgoCD.
This tutorial walks you through creating a production‑ready front‑end project from an empty directory using Webpack 5, React 18 and TypeScript, covering project structure, dependencies, Babel and TypeScript setup, resource handling, development environment, performance optimizations, and full configuration files.
This article explains Redis's persistence strategies—including RDB snapshotting with Copy‑On‑Write, AOF command logging with configurable fsync policies, and the hybrid persistence introduced in Redis 4.0—detailing their implementation, performance trade‑offs, configuration options, and practical usage examples.
This guide walks you through eight practical steps to secure SSH on a Linux server, including disabling root login, changing the default port, restricting empty passwords, limiting authentication attempts, enforcing protocol 2, disabling forwarding, using key‑based authentication, and applying IP‑based access controls.
This article provides a step‑by‑step tutorial on configuring Nginx rewrite rules, implementing anti‑hotlinking protection, separating static and dynamic resources, and building a high‑availability architecture using Keepalived with detailed code examples and deployment instructions.
The article explains how NetEase Media rebuilt its core services with Go, created the open‑source ngo framework to unify dependencies, health‑check, tracing, configuration and OpenID support, and provides detailed code examples and integration guidelines for backend developers.
This article explains why Logback is preferred over Log4j, shows how to add the necessary Maven dependencies, describes default and custom configurations via logback‑spring.xml, details logger, appender, layout, rolling policies and filters, and provides best practices for efficient logging in Spring Boot applications.
This article explains how Fluentd works in distributed and containerized environments, walks through its core concepts of input, filter, and output plugins, and provides a step‑by‑step Docker demo that collects, filters, parses, and stores Kubernetes application logs for further analysis.
This article walks through handling YAML configuration files in Rust, demonstrating how to define a Config struct, implement default values and utility methods, initialize a global singleton with lazy_static, and load configurations conditionally in a command‑line application.
This article explains how Dble validates its configuration files during startup, lists the main configuration file types, and walks through typical startup failure examples—such as port conflicts, syntax errors, and backend MySQL connectivity issues—providing step‑by‑step troubleshooting guidance for new users.
This article demonstrates how to use MySQL Shell's DBA component to deploy multiple MySQL sandbox instances of different versions, customize their deployment directories, and configure instance parameters through command‑line options and MySQL configuration files.
This guide walks through eight essential steps to harden SSH on Linux servers, including disabling root login, changing the default port, restricting password usage, limiting authentication attempts, enforcing protocol 2, disabling forwarding, using key-based authentication, and applying IP-based access controls.
This article demonstrates how to configure Spring Boot for multiple environments, retrieve custom parameters, package and run the application, modify startup settings via system variables or command‑line arguments, and explains the priority and detailed JVM options for optimizing a Spring Boot service.
This article introduces nginxconfig.io, an open‑source visual tool that simplifies Nginx configuration by letting you select site presets, services, HTTPS, logging, limits and global performance options, then instantly generates ready‑to‑use config files for faster deployment.
This guide explains why the default SSH configuration is risky and provides eight concrete actions—including disabling root login, changing the default port, limiting authentication attempts, and using key‑based authentication—to secure Linux servers against common attacks.
This tutorial explains step‑by‑step how to expand a Redis cluster from three masters and three slaves to four masters and four slaves by preparing a new configuration, starting the new instance, and using redis‑cli to add the node and verify slot distribution.
This article provides a comprehensive tutorial on configuring Nginx as a static file server, setting up location mappings, implementing reverse proxy, various load‑balancing strategies, dynamic‑static separation, and essential directives such as return, rewrite, error_page, logging, and access control.
This article explains why a Spring Boot application can end up with two UserManager beans—one from @Configuration + @Bean and another from @Component—by analyzing bean definition overriding, the role of ConfigurationClassPostProcessor, and the impact of the allowBeanDefinitionOverriding setting across Spring versions.
This article provides a detailed, English-language tutorial on preparing the network environment, creating necessary directories, configuring Redis instance files, launching six Redis nodes, and initializing a clustered Redis deployment across three servers using Linux command‑line tools.
This article explains how to integrate Alibaba's Druid database connection pool into a Spring Boot application, covering Maven dependencies, YAML configuration, built‑in filters, monitoring pages, ad removal techniques, and programmatic access to Druid statistics for comprehensive backend performance management.
This article explains how to configure Dble's read‑write splitting feature by preparing MySQL master‑slave instances, defining dbGroup and rwSplitUser in XML configuration files, reloading the settings, and verifying that write statements go to the primary node while reads are load‑balanced across replicas.
This article provides a step‑by‑step guide to installing Nginx, explains core directives such as listen, server_name, location, and proxy_pass, and covers advanced topics including rate limiting, load balancing methods, keepalive connections, static resource handling, CORS, and anti‑hotlinking configurations.
This article details the end‑to‑end design of Baidu App’s personal wallet, covering background requirements, business integration, system architecture, data‑sync mechanisms, multi‑level caching, read‑write separation, data consistency, configuration management, and database sharding to achieve high availability and scalability.
This article presents a comprehensive case study of Baidu App’s personal wallet, detailing its background, business goals, system architecture, data‑synchronization mechanisms, multi‑level caching, read‑write separation, consistency guarantees, configuration management, and database sharding to achieve high availability and scalable performance.
This guide explains the differences between editors, compilers, and debuggers, introduces Vim's multi‑mode editing, provides essential command‑line operations, navigation, editing, searching, and saving shortcuts, and shows how to configure Vim with .vimrc for a smoother development experience.
This guide details how to set up Redis Sentinel for high‑availability in a master‑slave architecture, covering configuration file creation, essential sentinel parameters, starting Redis and Sentinel instances, and verifying operation via log inspection.
This comprehensive guide explains what Nginx is, its advantages, typical use cases, request handling, high‑concurrency model, forward and reverse proxy concepts, directory layout, key configuration directives, load‑balancing algorithms, rate limiting, health checks, gzip compression, and practical examples for virtual hosts and module management.
Since 2016, the author shares a collection of Spring Boot best practices—including using custom BOMs, leveraging auto‑configuration and starters, employing Spring Initializr, structuring code, designing services, managing databases, handling concurrency, externalizing configuration, global exception handling, logging, and thorough testing—to help developers build robust, maintainable microservices.
This article details the design and implementation of Baidu App’s “My Wallet” feature, covering its background, business goals, system architecture, data synchronization, multi‑level caching, read‑write separation, data consistency, configurability, and database sharding to achieve high availability and performance for billions of users.
This article provides a step‑by‑step tutorial on installing Nginx, explains core directives such as listen, server_name, and location, and covers advanced topics like rate limiting, various load‑balancing algorithms, reverse proxy setup, keepalive tuning, gzip compression, CORS, anti‑leech, and integration with LVS and keepalived for high‑availability deployments.
This guide walks through preparing the environment, creating necessary directories, editing Redis configuration files for both master and slave nodes, and launching a three‑node Redis cluster with appropriate authentication and replication settings.
This article provides a step‑by‑step tutorial on installing and configuring Spring Boot Admin, including Maven dependencies, server and client setup, YML properties, security, Nacos registration, email notifications, custom health indicators, and Micrometer metrics to monitor Spring Boot services.
This article explains how to implement a custom PropertySourceLocator in Spring Cloud Alibaba, detailing the necessary spring.factories configuration, core classes like NacosConfigBootstrapConfiguration and NacosPropertySourceLocator, and the process of obtaining ConfigService, loading shared, extended, and application configurations from Nacos.
This article demonstrates how to set up an Nginx location block that proxies image requests to a PHP watermark service, provides a complete PHP Watermark class implementation, and shows a usage example for applying watermarks to images on the fly.
This article provides a comprehensive guide to Nginx, covering its core concepts, installation steps, key configuration sections, reverse‑proxy and load‑balancing examples, static‑dynamic separation, performance tuning, and high‑availability clustering for production environments.
This guide walks through troubleshooting DBLE container deployment by adjusting Docker network subnets, correcting DBLE configuration IPs, and granting the necessary database permissions to ensure the logical schema is created without errors.
This guide walks you through upgrading to Spring Boot 3.0 by adopting Java 17, moving to Spring Boot 2.7 first, cleaning deprecated APIs, adjusting configuration files, handling profile activation, and addressing compatibility and performance changes such as the new PathPatternParser.
This article explains how Redis RDB persistence works, detailing the save configuration parameters, snapshot generation methods, differences between SAVE and BGSAVE, storage locations, and the advantages and disadvantages of using RDB snapshots.
This article compiles frequently asked questions and detailed solutions covering Apache Doris operational problems, data handling errors, and SQL query issues, providing step‑by‑step guidance, configuration tips, and command examples to help administrators troubleshoot and maintain a stable Doris cluster.
This comprehensive guide explains what Nginx is, its core features, typical use cases, ecosystem extensions, installation methods, detailed configuration examples—including HTTPS, redirects, static mapping, proxying, rate limiting, authentication, load‑balancing strategies, and security hardening—plus an overview of its architecture and source‑code layout.
This guide explains the upcoming Spring Boot 3.0 release, the need for Java 17, step‑by‑step upgrade to Spring Boot 2.7, removal of deprecated APIs, configuration file changes, new path‑parsing strategy, Jakarta EE 9 compatibility, and tips for trying Spring 6.
This article presents sixteen practical best‑practice recommendations for developing Spring Boot microservices, covering dependency management, auto‑configuration, project initialization, code organization, service design, database isolation, concurrency, configuration externalization, exception handling, logging, testing, and more, to help Java backend engineers build robust, maintainable applications.
