This article explains why dynamic data sources are needed in high‑traffic Spring Boot applications, shows how to configure multiple databases via Maven, YAML and Java, and demonstrates a custom annotation‑driven AOP solution for seamless runtime routing.
This article introduces a Spring Boot starter that enhances native @Scheduled tasks with dynamic management capabilities, explains how to integrate the dependency, and details the underlying implementation using post‑processors, application runners, custom managers, and CGLIB‑based proxy chains to modify scheduling parameters at runtime.
This article provides a comprehensive overview of Spring's core utility classes—including Assert, ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, and AOP helpers—detailing their purpose, key methods, and practical code examples for robust backend development.
This comprehensive guide walks through Spring's lightweight Java framework, covering its core principles, key features, advantages and drawbacks, the design patterns it employs, core modules, IoC container mechanics, bean scopes, lifecycle, dependency injection techniques, and AOP fundamentals, all illustrated with diagrams and code snippets.
This article explains how Spring's bean lifecycle and its three-level caching mechanism—singletonObjects, earlySingletonObjects, and singletonFactories—work together to resolve circular dependencies, especially when AOP proxies are involved, highlighting why a three‑cache approach is necessary.
This article provides a comprehensive overview of Spring Framework’s core utility classes—including Assert, ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, and AOP helpers—detailing their purpose and key method signatures for developers working on Java backend projects.
The team enhanced the Dart AOP framework Aspectd to expose compile‑time module, class, method, and argument data, insert branch‑level instrumentation, and enable bulk injection via a configuration file, providing precise code coloring and automated test‑case recommendation for large‑scale Flutter applications.
This article explains the common Spring AOP annotations such as @Before, @After, @AfterReturning, @AfterThrowing and @Around, demonstrates how to set up a Spring Boot project, write an interface, implementation, aspect, and discusses execution order, multiple aspects, and proxy‑failure scenarios.
This article presents a curated collection of Spring Framework utility classes—including assertion helpers, object/array/collection utilities, file and resource IO tools, as well as reflection and AOP utilities—providing ready‑to‑use methods that replace many custom helper functions in Java backend development.
This article explains four Spring‑Boot techniques—traditional AOP, HandlerInterceptor, custom HandlerMethodArgumentResolver, and Servlet Filter—to perform generic authentication with code examples and a final comparison of their execution order.
This article explains how Spring’s @Transactional annotation leverages AOP dynamic proxies and the TransactionInterceptor to automatically manage transaction boundaries, reducing boilerplate code and allowing developers to focus on business logic.
This article explains the execution order of Spring AOP annotations, demonstrates why an @Around advice may invoke a method twice when ProceedingJoinPoint.proceed() is called multiple times, and provides corrected code to ensure proper single execution.
This article describes how ZTO's testing team created a centralized test‑tool platform that integrates front‑end and back‑end services, standardizes tool access, tracks usage via AOP, supports data generation, order creation, tracking, MQ messaging, and other platform integrations to dramatically improve testing productivity.
This article explains how to create a custom logging solution in Spring by defining annotation-based AOP aspects, configuring pointcuts, handling various advice types, and persisting log details such as user, operation, parameters, and results into a database using Java code examples.
This guide explains how to create a custom Spring AOP logging solution by defining a @SystemCrmlog annotation, extracting its parameters via pointcuts, and persisting detailed log entries—including user, method, parameters, and execution results—to a database using aspect advice methods.
Explore a comprehensive list of 18 essential Spring interview questions covering design patterns, core modules, IoC, DI, AOP, proxy types, bean lifecycle, circular dependency resolution, transaction management, and Spring Boot auto‑configuration, complete with concise explanations and illustrative diagrams to help you ace your interview.
This article explains the proxy and decorator design patterns using a coffee analogy, provides complete Java code examples for static and dynamic proxies, discusses their differences, and shows how to implement a Spring‑like AOP mechanism with JDK InvocationHandler and cglib, while also warning about their limitations.
This article explains the concept of routing in Android applications, discusses why third‑party routing frameworks are often needed for large, componentized apps, outlines the essential features of a routing framework, and details the implementation techniques such as annotation processing, AOP injection, and service routing with concrete code examples.
This article explores Koa’s core AOP‑based architecture, demonstrates minimal implementations using koa‑compose and Node.js http, and proposes a microservice‑oriented framework that extends Koa to support HTTP, Thrift, WebSocket and other services, complete with abstract server designs and example code.
This article walks through the proxy and decorator design patterns using a coffee‑ordering example, compares their differences, explains how Spring AOP relies on proxy mechanisms, and demonstrates building a custom dynamic proxy for SMS cost tracking with JDK InvocationHandler and cglib.
This article explains why Spring's @Transactional annotation can silently fail in many typical situations—such as incorrect method visibility, final methods, self‑invocation, unmanaged beans, multithreading, non‑transactional tables, missing configuration, wrong propagation or rollback settings, nested transaction behavior, and oversized transaction scopes—and provides practical solutions to ensure reliable transaction management.
This article explains common reasons why Spring's @Transactional annotation can become ineffective—such as self‑invocation, non‑public methods, multiple data sources, incorrect rollback settings, and unsupported database engines—and provides concrete code examples and solutions to ensure proper transaction management.
This article explains how to prevent data leaks by encrypting configuration files and masking sensitive fields in Spring Boot applications using Jasypt, covering Maven setup, encryption/decryption methods, custom annotations, AOP implementation, and the underlying PBE algorithm details.
This article demonstrates how to create a Spring AOP request‑logging aspect that captures request details, parameters, results, execution time, and error information, and discusses enhancements for high‑concurrency environments by aggregating log data into a single JSON object.
This article compiles a comprehensive set of Spring interview questions covering design patterns, core modules, IoC, DI, AOP, proxy mechanisms, bean lifecycle, circular dependency resolution, transaction isolation and propagation, as well as Spring Boot auto‑configuration principles, providing concise explanations for each topic.
This tutorial explains how to implement read/write splitting in Spring Boot by configuring multiple data sources, creating a custom AbstractRoutingDataSource, and using AOP to dynamically route queries to master or slave databases based on method patterns and annotations.
This article explains how to implement clean, decoupled operation logs in Java applications using AOP, SpEL, custom annotations, and dynamic templates, covering use cases, implementation methods, code examples, parsing logic, context handling, and integration with Spring Boot.
This article explains the difference between system and operation logs, presents common log formats, and provides step‑by‑step implementations—including Canal binlog listening, log‑file recording, LogUtil helpers, and a full AOP‑based @LogRecord solution—while detailing template parsing, context handling, custom functions, and persistence in a Spring Boot environment.
This article explains how to add a reusable appkey whitelist check to a Spring‑Boot web framework by comparing four implementation methods—traditional AOP, Spring Interceptor, custom ArgumentResolver, and Servlet Filter—detailing their code, configuration steps, extensions, and execution order.
This article explains how Spring AOP annotations such as @Before, @After, @Around and @AfterReturning are defined, demonstrates their usage with concrete Java code, analyzes why @Around may be invoked twice, and provides the correct implementation and execution flow of advice methods.
This article explains the fundamentals of Aspect‑Oriented Programming, introduces AspectJ as a standalone AOP solution, demonstrates how to implement a HelloWorld example with compile‑time weaving, compares it with Spring AOP’s runtime proxies, and shows how CGLIB can be used for proxy generation.
This tutorial explains why API rate limiting is essential for high‑traffic Spring Boot services, introduces counter, leaky‑bucket, and token‑bucket algorithms, shows how to use Guava's RateLimiter, and demonstrates a clean custom‑annotation AOP solution to decouple rate‑limiting logic from business code.
This article explains how Spring's @Transactional annotation works by leveraging AOP and dynamic proxies, walks through the bean post‑processor and advisor setup, and details the core TransactionInterceptor code that manages transaction boundaries during method execution.
This article explains how to implement read/write separation in a Spring Boot application by configuring multiple data sources, creating a custom AbstractRoutingDataSource, using AOP to switch between master and slave databases, and demonstrates the setup with Maven, MyBatis, and JUnit tests.
This tutorial explains Java's proxy design pattern, bytecode manipulation, static proxies using AspectJ and JDK, dynamic proxies with JDK and CGLIB, and demonstrates how Spring AOP selects between these mechanisms, providing complete code examples for each approach.
This article explains why Spring @Transactional may become ineffective or fail to roll back in various situations—such as wrong method visibility, final modifiers, internal calls, missing Spring bean registration, multithreading, unsupported table engines, misconfigured propagation, swallowed exceptions, and improper rollback settings—while also offering practical solutions and best‑practice recommendations.
This article explains how Spring AOP weaves aspect code using dynamic proxies, why internal calls via this bypass proxy logic, and how to correctly configure and obtain proxied beans using JDK/CGLIB proxies, @EnableAspectJAutoProxy, @Autowired injection, and AopContext.
Learn how to use Spring Boot’s AOP features to automatically fill creator, creation time, updater, and update time fields for any DAO insert or update operation, eliminating repetitive code and ensuring consistent audit logging across all database tables.
This tutorial demonstrates how to leverage Spring AOP in a Spring Boot project to automatically fill common audit columns such as creator, creation time, updater, and update time for database tables, eliminating repetitive manual SQL handling and centralizing logging logic.
This article explains the differences between system and operation logs, explores various implementation methods such as Canal, file logging, LogUtil, and method annotations, and demonstrates how to achieve clean, dynamic, and decoupled operation logging in Java Spring applications using AOP, SpEL, custom functions, and a well‑structured logging context.
This article explains how to achieve read‑write splitting in a Spring Boot application by configuring multiple data sources, creating a custom AbstractRoutingDataSource, managing routing keys with ThreadLocal, and using AOP to automatically switch between master and slave databases for different CRUD operations.
This article explains why Spring AOP proxies are not applied when a bean invokes its own methods via the this reference, compares JDK and CGLIB proxy mechanisms, and shows how to enable proxy exposure or use AopContext to achieve the desired AOP behavior.
This article explains how third‑party JavaScript can provide features like commenting or app‑invocation through lightweight scripts, and explores product positioning, functional boundaries, and extensibility techniques such as aspect‑oriented callbacks and plugin systems with concrete code examples.
This article describes how Beike's Flutter team leveraged Flutter for Web to enable rapid online issue mitigation, detailing the compilation pipeline, platform‑specific challenges such as operating‑system detection and dart:io limitations, and the multi‑module disaster‑recovery architecture they built.
The article demonstrates how to implement elegant, business‑logic‑independent operation logging in Java back‑ends by using AOP‑driven annotations, SpEL dynamic templates, custom parse functions, thread‑local context, and a Spring Boot starter, offering flexible persistence and automatic operator retrieval.
This article explains how to achieve database read‑write separation in high‑concurrency scenarios using Spring Boot, covering the concepts of master‑slave architecture, configuration of multiple data sources, routing logic with AbstractRoutingDataSource, context management, custom annotations, AOP handling, and practical usage examples with code snippets.
This article demonstrates how to use Spring Boot's AOP features to automatically populate common audit columns such as creator, creation time, updater, and update time during DAO insert and update operations, eliminating repetitive manual SQL handling.
This article explores why Spring transactions may fail, covering seven common pitfalls such as incorrect method visibility, final methods, internal calls, missing Spring management, multithreading, unsupported table engines, and misconfigured propagation, and provides practical solutions to ensure reliable transaction handling.
This article explains the concept of idempotency, the common causes of duplicate submissions in web applications, and presents multiple backend solutions—including frontend button disabling, Post‑Redirect‑Get, session tokens, local locks with Content‑MD5, AOP aspects, and Redis distributed locks—accompanied by complete Java code examples.
This article explains four approaches to adding a generic appkey whitelist check in a Spring Boot web framework—traditional AOP, HandlerInterceptor, custom HandlerMethodArgumentResolver, and Servlet Filter—providing implementation steps, code examples, and a discussion of their execution order and extensibility.
This article explains TypeScript’s @Decorator syntax sugar, showing basic examples, how the compiler transforms them into the __decorate helper, the various decorator types and factories, execution order, and the benefits and pitfalls of using decorators in frameworks like Angular and Nest.js.
The guide explains JavaScript/TypeScript decorators—an ECMAScript stage‑2 proposal used in frameworks like Angular, Nest.js, and TypeORM—by distinguishing the decorator pattern, function, and @syntax, demonstrating a four‑step manual implementation that logs execution time, and linking decorators to AOP, IoC, and DI concepts.
This article explains Spring's pointcut implementations, covering static and dynamic pointcuts, regular‑expression based pointcuts, the RegexpMethodPointcutAdvisor, control‑flow pointcuts, and how to create custom pointcuts by subclassing Spring’s abstract pointcut classes, with full XML and Java code examples.
This article explains why a custom AOP annotation like @MyMonitor may not trigger advice in Spring Boot, analyzes the proxy‑based limitation of Spring AOP, and provides practical solutions such as self‑injection or AspectJ mode to ensure the advice executes correctly.
The article explains how Xianyu’s search service refactors tightly‑coupled, if‑else‑heavy code by applying the lightweight SWAK framework—defining @SwakInterface and @SwakTag annotations, registering proxy beans, using AOP and CGLIB proxies to route business logic via request‑derived tag groups, achieving clean, modular routing.
This article compares four Spring Boot techniques—traditional AOP, HandlerInterceptor, custom HandlerMethodArgumentResolver, and Servlet Filter—for implementing a generic appkey whitelist validation, explains their implementation steps with code examples, and clarifies their execution order within the request processing pipeline.
This article explains four Spring‑Boot techniques—traditional AOP, HandlerInterceptor, HandlerMethodArgumentResolver, and Servlet Filter—to implement a reusable appkey whitelist validation, provides complete code examples for each, and clarifies their execution order within the request processing pipeline.
This article explains how Aspect‑Oriented Programming is applied in Android development to achieve non‑intrusive privacy compliance checks and thread‑usage optimization, detailing the use of compile‑time ASM bytecode instrumentation and runtime Xposed/epic hooks, along with code examples and measured performance gains.
This article introduces Aspect‑Oriented Programming in Spring, explains core concepts such as pointcut, advice, aspect, join point and weaving, and provides step‑by‑step code examples—including a simple @GetMapping logger, a custom permission annotation with multiple aspects, and detailed usage of @Pointcut, @Around, @Before, @After, @AfterReturning and @AfterThrowing annotations—illustrated with diagrams and runnable snippets.
Learn how to create a custom SpringBoot annotation that supports ${…} placeholder expressions by adding AspectJ dependencies, defining the annotation, implementing an AOP aspect that resolves placeholders via EnvironmentAware, storing the result in a ThreadLocal, and using it in a service and controller.
This article explains Aspect‑Oriented Programming (AOP) in Spring Boot, covering its core concepts, why it simplifies cross‑cutting concerns like logging and permission checks, provides step‑by‑step code examples of simple and advanced AOP implementations, and details the most commonly used AOP annotations.
This article explains the purpose and inner workings of Spring's @Transactional annotation, detailing how AOP and dynamic proxies create transactional proxies, the role of BeanPostProcessor, advisors, TransactionInterceptor, and the transaction lifecycle, accompanied by code examples and diagrams for deeper insight.
This article explains the purpose and inner workings of Spring's @Transactional annotation, detailing how AOP creates proxy objects, the role of BeanPostProcessor, advisors, interceptors, and the TransactionInterceptor, and walks through key source code snippets that manage transaction boundaries.
This article demonstrates how to use Spring AOP to create a request‑logging aspect that captures request parameters, response data, execution time, and error information, while also addressing high‑concurrency logging issues and integrating trace‑ID tracking for easier debugging.
This article explains how the BizLog component records who performed which action at what time in Spring Boot applications, covering Maven setup, annotation usage, custom operators, detail fields, category segregation, SpEL expressions, custom parse functions, and extension points for persistence and operator retrieval.
This article explains the behavior of Spring Boot’s @Configuration and @Import annotations, the reasons a custom PointcutAdvisor may not be applied when using JDK proxies, and provides two solutions—adding the @DS annotation to interface methods or forcing CGLIB proxying with proxyTargetClass=true—to ensure the advice executes correctly.
This article explains how Spring 5.3.3 creates AOP proxy objects using Advisors, details the internal methods for locating and applying both bean-defined and @Aspect advisors, and demonstrates how to implement a custom Advisor to intercept methods annotated with @DS, including common pitfalls and solutions.
This guide demonstrates how to add a custom AOP‑based caching layer to a SpringBoot application, using Redis to store frequently queried MySQL table data, defining @AopCacheEnable and @AopCacheEvict annotations, implementing an aspect, handling key generation, expiration, and cache eviction on CRUD operations.
This article walks through Spring’s AOP proxy creation process, detailing how enabling @EnableAspectJAutoProxy registers AnnotationAwareAspectJAutoProxyCreator, how it decides whether to wrap a bean, and the internal methods—wrapIfNecessary, isInfrastructureClass, shouldSkip, and advisor discovery—that together generate the dynamic proxies used at runtime.
This article explains how to add a generic app‑key whitelist authentication feature to a Spring Boot web framework using four different mechanisms—traditional AOP, HandlerInterceptor, custom HandlerMethodArgumentResolver, and Servlet Filter—providing implementation steps, code examples, and a discussion of their execution order.
This article demonstrates how to use Spring AOP to create a request‑logging aspect that captures IP, URL, HTTP method, parameters, results, execution time, and error details, while also addressing high‑concurrency logging issues and integrating trace‑ID tracking for easier debugging.
This comprehensive guide explores the Spring framework’s fundamentals, including its lightweight architecture, core IoC container, dependency injection mechanisms, bean scopes and lifecycle, annotation‑based configuration, data‑access support, and aspect‑oriented programming features, providing developers with a solid foundation for building robust Java applications.
This article explains the principles and step‑by‑step implementation of Aspect‑Oriented Programming (AOP) in a lightweight Spring‑style container, covering core concepts, advice and pointcut design, weaving mechanisms, proxy creation, observer integration, and practical code examples.
This article explains how to add a generic appkey whitelist authentication feature to a Spring Boot web framework using four approaches—traditional AOP, HandlerInterceptor, HandlerMethodArgumentResolver, and Servlet Filter—providing implementation steps, code examples, and a discussion of their execution order.
After a massive crash caused by a malformed Facebook SDK payload highlighted the lack of fault‑tolerance, this article explains why iOS crash protection is essential, outlines a four‑step handling workflow, and details two main techniques—Aspect‑Oriented Programming hooks and managed zombie objects—along with their pitfalls, performance impact, and memory‑threshold formulas for safe production deployment.
This article introduces Aspect‑Oriented Programming in Java, explaining how AOP separates cross‑cutting concerns like logging using join points, pointcuts, advice, and aspects, and demonstrates dynamic proxies, various advice types, XML configuration, and aspect ordering within Spring AOP.
Learn how to implement a robust request logging aspect in Spring using AOP annotations, covering pointcut definition, before/around/after advice, handling high concurrency, serializing logs, capturing errors, and adding traceId support for better traceability in backend services.
The article analyzes a Spring Boot transaction issue where a @Transactional method called from another non‑transactional method fails to roll back, explains the underlying propagation and proxy mechanisms, and presents two practical solutions—including using the bean’s proxy via AopContext with exposeProxy enabled—to ensure proper rollback.
An extensive overview of the Spring Framework covering its core concepts, version features, lightweight architecture, IoC container, dependency injection methods, bean definitions and scopes, configuration styles, annotation usage, AOP principles, MVC workflow, data access mechanisms, and related implementation details with code examples.
This tutorial demonstrates how to create JavaBeans, DAO interfaces, and implementations, use JDK dynamic proxies to expose proxy classes, troubleshoot method‑level proxy failures, and apply Spring AOP with ProxyFactory or @Aspect, while also covering transaction pitfalls and best‑practice configurations.
This article explains the purpose and inner workings of Spring’s @Transactional annotation, detailing how AOP creates proxies, defines pointcuts, and orchestrates transaction management through BeanPostProcessors, advisors, interceptors, and the TransactionInterceptor, illustrated with source code snippets and diagrams.
This article explains the purpose of Spring's @Transactional annotation, how it leverages AOP and dynamic proxies to manage transactions, and walks through the core source‑code components—including BeanPostProcessor, advisors, TransactionInterceptor, and the transaction lifecycle—illustrated with concrete code examples.
This article explores using AOP techniques such as Method Swizzle and NSProxy‑based delegate proxies to instrument iOS view controllers and collection view delegates, analyzes crashes caused by multiple setDelegate hooks—including interactions with RxCocoa—and proposes several practical solutions to ensure stable hooking in complex app environments.
This article explains how to implement read‑write separation in Spring Boot by extending AbstractRoutingDataSource, using ThreadLocal for key storage, and creating AOP aspects that prioritize datasource switching over transaction management.
This article explains how Spring Cloud Sentinel’s @SentinelResource annotation works, detailing its AOP interception, the responsibility‑chain slot mechanism, flow‑control and circuit‑breaker processing, and shows the relevant configuration and code examples for integrating Sentinel into a Spring Boot backend.
This article explains typical situations where Spring @Transactional annotations fail—such as non‑public methods, beans not managed by the container, internal method calls, non‑RuntimeException throws, caught exceptions without rethrow, incorrect propagation settings, and unsupported MyISAM storage—and provides concrete code examples and fixes to ensure proper transaction behavior.
This article provides a comprehensive overview of the Spring framework, covering its core modules, version compatibility, core concepts such as IoC and AOP, proxy implementations, bean factories, lifecycle management, transaction handling, MVC architecture, Spring Boot, Spring Cloud, and common annotations for Java backend development.
This article explains how to achieve database read‑write separation in a Spring application by using AbstractRoutingDataSource for routing, ThreadLocal for context, AOP interceptors for automatic switching, and provides a complete example with configuration, service code, and test cases.
This article explains typical reasons why @Transactional may not work in Spring applications—such as non‑public methods, beans not managed by the container, internal method calls, non‑RuntimeException throws, swallowed exceptions, wrong propagation settings, and unsupported MySQL storage engines—and provides concrete code examples and fixes for each case.
This article explains three typical situations where Spring's @Transactional annotation fails—non‑public methods, internal method calls, and caught exceptions—detailing the proxy‑based AOP mechanism, source code examples, and how to diagnose and resolve each issue.
This article explains three typical situations in which Spring's @Transactional annotation becomes ineffective—non‑public methods, internal self‑calls, and caught exceptions—illustrates each case with runnable code examples, and dives into the underlying AOP and transaction‑management source code to show why the proxy logic is bypassed.
The article analyzes three typical situations—non‑public methods, internal self‑calls, and caught exceptions—that cause Spring's @Transactional annotation to be ineffective, explains the underlying proxy and AOP mechanisms, and provides Java code samples and test cases to illustrate each case.
An in‑depth guide to the Spring framework covering its lightweight architecture, core principles such as IoC, DI, and AOP, key design patterns, module structure, bean lifecycle, circular dependency handling, and essential annotations for building robust Java backend applications.
This article provides a comprehensive overview of the Spring framework, covering its lightweight architecture, core principles such as Inversion of Control and Dependency Injection, AOP mechanisms, design goals, module structure, common design patterns, bean lifecycle, circular dependency handling, and the most frequently used Spring annotations with code examples.
This article outlines common situations that cause Spring @Transactional to fail—such as non‑public methods, internal method calls, unmanaged beans, non‑runtime exceptions, silent catches, incorrect propagation settings, and unsupported MySQL storage engines—and provides practical solutions to ensure transaction reliability.
This tutorial explains how to reduce repetitive validation code in a ThinkPHP project by creating a reusable BaseValidate class that leverages AOP principles, automatically handles request data, and centralizes error handling for cleaner, more maintainable backend code.
This article explains the main reasons why Spring's @Transactional annotation may become ineffective—including non‑public method modifiers, internal method calls, and swallowed exceptions—provides code examples, test cases, and a deep dive into the underlying proxy and AOP mechanisms.
The article demonstrates how to create a custom @ValidShop annotation and an AOP aspect that intercepts Spring MVC controller methods, extracts the annotated parameter via reflection, validates the shop code through a helper service, and proceeds only when the check succeeds.
This article introduces the BizLog SDK for Spring Boot, explaining how to add Maven dependencies, enable logging with @EnableLogRecord, configure log records using @LogRecordAnnotation for success, failure, categories, details, operators, custom parsing functions, and shows how to extend the framework with custom services and implementations.
This article explains the core principles of Spring transaction management, covering basic JDBC transaction steps, declarative @Transactional usage, AOP proxy mechanisms (JDK dynamic proxy and CGLIB), transaction propagation attributes, isolation levels, nested transactions, and Spring Boot support, with practical code examples.
