This article explains how to protect time‑consuming business operations using a Redis‑based distributed lock implemented with custom annotations, Spring AOP, and a scheduled thread pool that automatically extends lock expiration to avoid premature release.
This article explains how to protect time‑consuming business operations by using Redis as a distributed lock, designing a custom @RedisLock annotation, applying Spring AOP to intercept methods, handling lock acquisition, expiration, renewal via a ScheduledExecutorService, and releasing the lock safely after execution.
This article explains the complete Spring bean lifecycle—including creation, property filling, initialization, usage, and destruction—detailing how Spring manages object creation, dependency injection, AOP proxy generation, and lifecycle callbacks through various internal phases and extension points.
This article explains how to dynamically manage multiple Spring data sources, switch them at runtime using AbstractRoutingDataSource, and ensure transactional consistency across databases by implementing custom AOP, connection proxies, and multi‑transaction annotations.
This tutorial walks through creating a reusable SpringBoot starter that combines Guava's local token‑bucket limiter and Redis's distributed limiter, allowing developers to toggle between them via a simple configuration property and integrate the solution seamlessly with AOP and conditional beans.
This article explains how to implement interface rate limiting in a Spring application by creating custom annotations, using AOP for method interception, and leveraging a Redis‑like ConcurrentMap cache to control request counts within a fixed time window.
This article demonstrates how to use Spring Boot AOP and HandlerInterceptor to create a unified user login permission check, standardized exception handling with @ControllerAdvice, and consistent JSON response formatting, providing step‑by‑step code examples and configuration details for building robust backend services.
This tutorial explains how to replace repetitive session checks in Spring Boot controllers with a unified login validation mechanism using AOP, custom HandlerInterceptors, @ControllerAdvice for exception handling, and a standard JSON response format, complete with code examples and flow diagrams.
This article walks through the design and implementation of a Redis‑based distributed lock for time‑consuming business operations, covering annotation creation, AOP pointcut setup, lock acquisition and release, timeout handling with a renewal thread, testing, and practical code examples.
This article explains three practical approaches—separate microservices, gateway + Redis whitelist, and gateway + AOP—to restrict external access to internal APIs, and provides a detailed Spring Cloud Gateway and AOP code implementation for Java microservice architectures.
This article provides a comprehensive guide to Java exception handling, covering exception categories, bytecode‑level mechanisms, common pitfalls, Alibaba’s coding standards, best‑practice recommendations, custom exception design, and global handling strategies for RPC and HTTP services in Spring Boot.
This article demonstrates how to build a unified processing module in Spring Boot by using AOP and HandlerInterceptor to centralize user login validation, standardize response formats, handle exceptions globally with @ControllerAdvice, and configure path prefixes, providing complete code examples and implementation details.
This article walks through building a Spring Boot application that centralizes user login verification, exception handling, and response formatting by leveraging AOP, custom HandlerInterceptors, @ControllerAdvice, and ResponseBodyAdvice to create clean, maintainable backend code.
This article demonstrates how to consolidate user login authentication, exception handling, and response formatting in a Spring Boot application by using AOP, custom HandlerInterceptors, @ControllerAdvice, and a unified AjaxResult wrapper to simplify development and improve maintainability.
This article explains how to use Spring's ProxyFactoryBean to create AOP proxies, covering its properties, the choice between JDK and CGLIB proxies, bean configuration examples, global advisors, and practical considerations for proxying classes versus interfaces.
This article provides an in‑depth walkthrough of how Spring resolves circular dependencies using its three‑level cache mechanism, complete with code examples, step‑by‑step execution flow, and a deep dive into why each cache level is essential.
This article explains the Spring AOP advice lifecycle, distinguishes shared and per‑instance advice beans, and details each advice type—around, before, throws, after‑returning, and introduction—along with practical Java code snippets for implementation.
This article explains how to enable @AspectJ support in Spring (both via annotations and XML), defines custom AspectJ pointcuts and advice, and dives into Spring AOP APIs such as Pointcut, ClassFilter, MethodMatcher, and utility classes for composing pointcuts.
JVM‑Sandbox provides a non‑intrusive, runtime AOP solution for Java backend applications, enabling developers to instrument code outside the Spring container, record traffic, hot‑fix vulnerabilities, simulate failures, and monitor Spring bean initialization, all through JVMTI, Instrumentation, and event‑driven modules.
This article explains how to create a custom @FeignRetry annotation that leverages Spring Retry to provide configurable, per‑method retry policies for Feign client calls, including code examples of the annotation, aspect implementation, and usage patterns.
This article explains how to design a flexible logging solution in Java by creating a custom @Log annotation, using meta‑annotations such as Retention and Target, and applying Spring AOP with various advice types to capture method parameters, return values, and notes without polluting service code.
This article explains the core concepts of the Spring framework—including its container, bean definition readers, bean factories, and three‑level cache mechanism—while detailing how Spring resolves circular dependencies and integrates AOP during bean creation.
This article explains the importance of data safety, defines the ACID properties of transactions, details how InnoDB implements them, and shows how Spring's @Transactional annotation works with AOP, including default rollback behavior, configuration options, and common pitfalls that can cause transaction failures.
This article explains why private controller methods in Spring Boot fail when AOP logging is enabled, revealing that CGLIB proxies cannot intercept private methods, which leads to null service injection, and provides code examples and a final conclusion.
This article explains how to extend the classic Role‑Based Access Control (RBAC) model with fine‑grained data permissions, detailing rule definition, database design, role‑rule binding, and AOP‑based enforcement, and offers optimization tips such as rule groups for complex scenarios.
This article explains how to achieve database read‑write separation in high‑concurrency scenarios using Spring Boot, Druid connection pool, dynamic DataSource routing, a ThreadLocal context holder, custom annotations, and AOP, providing complete configuration code and usage examples for both read and write operations.
This article explains how Spring's @EnableTransactionManagement activates transaction support by registering advisors and proxy beans, details the core execution flow of transactional methods, explores various propagation scenarios with code examples, and demonstrates forced rollback and transaction synchronization techniques.
This article explains how Spring enables transaction management through @EnableTransactionManagement, details the underlying advisor and proxy mechanisms, describes the basic and detailed execution steps, explores propagation types with practical code examples, and shows how to force rollbacks and use TransactionSynchronization for lifecycle callbacks.
This article explains how Aspect‑Oriented Programming (AOP) was introduced into a data construction platform to address high development effort, strong business coupling, and maintenance difficulty by isolating cross‑cutting concerns such as logging, thereby improving modularity, development speed, and code maintainability.
This article explains how to augment the classic Role‑Based Access Control (RBAC) model with row‑level data permissions, detailing rule definition, database design, role‑rule binding, and an AOP‑based implementation for dynamic SQL filtering.
This article explains Spring's IoC container architecture, bean definition processing, lifecycle methods, and AOP proxy creation, providing detailed code examples and step‑by‑step descriptions of resource loading, bean instantiation, dependency injection, and interceptor chains.
This article explains how Alipay measures and improves Android cold‑start performance through video‑frame analysis, ActivityTaskManager, custom instrumentation, home‑page snapshot techniques, temperature control, patch‑APK data collection, AOP‑based diagnostics, and an integrated APM platform.
This article walks through the fundamentals of Spring's transaction management, presenting a practical example, detailed execution workflow, and step‑by‑step source‑code analysis—including bean creation, AOP proxy generation, transaction attribute retrieval, transaction start, commit, and rollback – to help developers master Spring transaction internals.
This article explains Spring's @Transactional annotation, detailing its propagation options, rollback mechanisms, common pitfalls such as self‑invocation and non‑public methods, and demonstrates how to correctly invoke transactional methods via proxy objects with practical code examples.
This article presents a comprehensive Spring Boot tutorial on implementing non‑intrusive login authentication using three techniques—Filter, Interceptor, and AOP with custom annotations—plus extensions such as ThreadLocal storage and a Spring MVC argument resolver, complete with project setup, Maven dependencies, and test screenshots.
This article explains the differences between Spring MVC interceptors and servlet filters, provides complete Java code examples for both, describes how to configure them in Spring and web.xml, and summarizes their respective scopes, lifecycles, and typical use‑cases in web development.
This article explains the background of RocketMQ clusters, demonstrates typical Java consumer and producer usage, and introduces the AOP‑based HunterConsumer and HunterProducer components that simplify lifecycle management, configuration, and code reuse for backend developers working with messaging systems.
This article compares three approaches—microservice isolation, gateway with Redis whitelist, and a gateway‑plus‑AOP header strategy—to enforce internal‑only API access, and provides a complete Spring Cloud implementation with code examples and a diagram.
This article provides a comprehensive overview of Spring’s utility classes, covering Assert assertions, ObjectUtils, StringUtils, CollectionUtils, file and I/O helpers, as well as Reflection and AOP utilities, with code examples and usage notes for Java backend development.
This article explains how to design and implement a distributed lock using Redis, Spring AOP annotations, and a scheduled executor to automatically extend lock expiration, providing complete Java code examples, configuration details, testing procedures, and best‑practice recommendations for handling long‑running business operations safely.
This article explains how to achieve database read‑write separation in high‑concurrency Java applications by configuring master and slave data sources, implementing a routing DataSource, managing context with ThreadLocal, defining a custom @DataSourceSwitcher annotation, and applying AOP to switch between read and write operations.
Learn three practical strategies to prevent external exposure of specific APIs—isolating them in separate microservices, employing a Redis‑backed whitelist via the gateway, and using gateway‑added headers with AOP annotations—to enforce internal‑only access, complete with Java code examples.
This article walks through the design and implementation of a hand‑written Spring AOP module, covering core concepts such as Advice, Pointcut, weaving, proxy creation, and the integration of these components into a bean lifecycle to enable method‑level enhancements without modifying source code.
This article explains how to restrict certain APIs to internal network calls by comparing three approaches—microservice isolation, gateway + Redis whitelist, and gateway + AOP—and provides a complete Java implementation of the AOP solution with code examples.
This article explains how to protect time‑consuming business operations by using Redis as a distributed lock together with Spring AOP, covering annotation design, aspect implementation, lock acquisition, automatic renewal via a scheduled executor, and practical testing examples.
The article explains how to use Aspect‑Oriented Programming to globally intercept and rewrite Ajax and JSONP requests—both native and framework based—by extending Function.prototype, overriding DOM methods, and employing ajax‑hook and Axios interceptors, culminating in a runnable demo that redirects traffic from a‑domain to b‑domain.
This article reveals ten common Spring transaction pitfalls—including private methods, final modifiers, self‑invocation, missing @Service, wrong propagation, non‑transactional databases, swallowed or wrong exceptions, multi‑threaded calls, and nested transaction rollbacks—that can silently disable transaction management in Java backend projects.
This article explains three practical solutions for exposing internal‑only APIs in a Spring Cloud environment—separating services, using a gateway with a Redis whitelist, and applying a gateway‑plus‑AOP strategy—complete with code examples and deployment tips.
This article explains the concepts, advantages, and limitations of Java's JDK dynamic proxy and CGLIB proxy, provides step‑by‑step code examples for user registration validation, compares their mechanisms, and summarizes when to choose each approach in real‑world applications.
After upgrading to Spring Boot 2.7.1 (Spring Framework 5.3.21), the execution order of @Around, @Before, and @After advice changes, leading to ThreadLocal data loss inside @Around, and the article explains the cause, reproduces the issue, and recommends using only @Around for reliable logic.
This article explains how to protect time‑consuming business operations in a Spring Boot application by creating a custom @RedisLock annotation, using Redis as a distributed lock via AOP, implementing automatic lock renewal with a ScheduledExecutorService, and handling lock release and thread interruption.
This comprehensive guide walks you through Spring's core concepts—including IOC, DI, bean lifecycle, static and dynamic proxy patterns, AOP with annotations, and essential Spring annotations—while providing clear Java code examples and practical use‑cases for backend development.
This article explains the principles, advantages, and implementation details of Java's JDK dynamic proxy and CGLIB proxy mechanisms, providing step‑by‑step code examples that demonstrate how to enhance method calls such as user registration with validation logic.
The article presents a transparent data‑encryption framework for database security that uses an AOP‑based driver interceptor to rewrite SQL, encrypt/decrypt sensitive fields, manage performance with locks and caching, support configurable algorithms via SPI/YAML, and guide a three‑phase migration with minimal code intrusion.
This article explains how to achieve database read‑write separation in high‑concurrency Java applications by configuring master‑slave data sources, implementing a routing datasource, managing context with ThreadLocal, and using custom annotations with AOP to switch between read and write databases at runtime.
This tutorial explains how to build a lightweight log management module by defining a custom @SystemLog annotation, using Spring AOP to capture method execution details, and sending the log data through RabbitMQ via Spring Cloud Stream for asynchronous persistence in a database.
This article explains the origins and purpose of Spring transactions, demonstrates how to quickly set them up with code examples, explores key features and common pitfalls, and provides an in‑depth comparison of the REQUIRED, REQUIRES_NEW, and NESTED propagation types for robust backend development.
This article explains common pitfalls of Spring's transaction management—including AOP proxy limitations, unchecked exception handling, self‑invocation, asynchronous execution, multiple data sources, and large transaction issues—and provides practical solutions such as using class‑based proxies, configuring rollback rules, and splitting transactions into smaller units.
This article explains how to handle time‑consuming Excel uploads by using a template‑method design, wrapping the process with an AOP aspect, and executing the actual upload asynchronously in a thread pool, while recording logs and error details for later inspection.
This article provides a comprehensive analysis of Spring AOP, covering its core concepts, configuration parsing, BeanFactoryPostProcessor and BeanPostProcessor mechanisms, namespace handling, the creation of advisors and advice from @Aspect annotations, and the proxy generation process that enables method interception.
This article explains how Spring implements various design patterns—including Simple Factory, Factory Method, Singleton, Adapter, Decorator, Proxy, Observer, Strategy, and Template Method—detailing their implementation approaches, underlying principles, and practical code examples within the Spring container.
This article explains Spring’s transaction propagation behaviors, rollback mechanisms, common pitfalls such as self‑invocation and non‑public methods, and demonstrates how to correctly use @Transactional with AOP proxies, including practical code examples and solutions for ensuring transaction consistency.
This article shares several practical coding techniques for backend development, including how to commit Kafka transactions safely, simplify Redis distributed lock usage with Redisson, implement AOP-based method locking, and decouple business logging using thread pools and asynchronous processing.
This article shares practical development techniques, including how to safely commit Kafka messages within transactions, simplify Redis distributed locks with Redisson, implement an AOP‑based lock annotation for method-level locking, and decouple business logging using asynchronous thread pools and helper utilities.
The article explains why a unified response format like ResultBean is essential for Java backend APIs, outlines common interface design mistakes, provides concrete coding guidelines for controllers, and demonstrates how to use AOP for exception handling and logging, all illustrated with practical code examples.
This article provides a comprehensive guide to Java's reflection mechanism, class loading process, ClassLoader usage, and dynamic proxy techniques, illustrating how to inspect class structures, create objects, access fields and methods, retrieve generic type information, and implement both static and dynamic proxies with practical code examples.
This article explains Spring's @Transactional annotation, detailing the various transaction propagation options, the default rollback behavior for unchecked exceptions, common pitfalls such as self‑invocation and non‑public methods, and how to use AOP proxies like AopContext.currentProxy and @EnableAspectJAutoProxy to ensure proper transaction management.
The article explains why a unified response format (ResultBean) is essential for Java Spring APIs, lists common interface design mistakes, provides concrete coding guidelines for controllers, and demonstrates how to use AOP for logging and exception handling with clear code examples.
This article explains common pitfalls in Java API design—such as inconsistent return formats, missing error handling, and inappropriate parameters—and demonstrates how a unified ResultBean, strict controller conventions, and AOP logging can dramatically improve code readability, maintainability, and error management in Spring Boot projects.
The article explains Spring's three‑level cache mechanism—singletonObjects, earlySingletonObjects, and singletonFactories—and how early exposure combined with BeanPostProcessor hooks enables the framework to break circular dependencies while still applying AOP proxies before full bean initialization.
This article explains how to handle large Excel uploads in Java by offloading parsing and validation to a thread pool, using the Template Method pattern to reduce boilerplate, and finally applying a custom AOP annotation to manage logging, error handling, and asynchronous execution in a clean, reusable way.
This article explains Spring's @Transactional annotation, detailing propagation behaviors, rollback rules, common pitfalls such as self-invocation and non‑public methods, and provides practical solutions using AOP proxies and AopContext to ensure proper transaction management in Java backend applications.
This article describes a backend solution that uses Redis for configurable rate‑limiting and interface switches, and Hystrix for circuit‑breaking, detailing the requirements, AOP‑based approach, and full Java code implementation for managing non‑core query overloads.
This article explains Spring's core features such as IoC, DI and AOP, demonstrates creating a simple Hello World service with Spring Boot, then shows how to implement the same functionality using raw Servlets and finally builds a miniature Spring‑like framework with custom annotations, an IOC container and a dispatcher servlet.
This article explores the challenges of mobile white‑box testing and presents an AOP‑driven solution that injects flow‑recording and replay code suites into Android and iOS apps, detailing technical goals, testability metrics, instrumentation techniques, and practical engineering outcomes.
This article introduces Spring Expression Language (SpEL), explains its common syntax, demonstrates quick-start examples, shows real-world usage with AOP monitoring, and outlines its internal implementation, providing a concise guide for backend developers working with Spring.
This article compares AspectJ and Spring AOP, explains the four types of Spring AOP support, details classic Spring AOP proxy creation, demonstrates various advice implementations, shows XML and annotation configurations, and introduces auto‑proxy creators for simplifying AOP setup in Java backend development.
This article explains how Spring resolves circular dependencies by using a three‑level cache and early bean exposure, detailing the roles of singletonObjects, earlySingletonObjects, and singletonFactories, and showing how Spring AOP proxies are applied during the process.
This article explains how to add a universal app‑key whitelist authentication feature to a Spring‑Boot web framework by using four different mechanisms—traditional AOP, HandlerInterceptor, custom HandlerMethodArgumentResolver, and a Servlet Filter—while comparing their execution order and extensibility.
This article explains how to prevent duplicate backend requests caused by rapid user clicks by creating a reusable @ApiLock annotation that leverages distributed locks, generates lock keys from request parameters, and integrates an AOP aspect to acquire and release locks around controller methods.
This article explains Spring's circular‑dependency solution, detailing the early‑exposure mechanism, the three‑level cache (singletonObjects, earlySingletonObjects, singletonFactories), how BeanPostProcessors and AOP proxies interact during bean creation, and why the third‑level cache is essential for correct bean wiring.
This article introduces Spring's Assert utilities, explains the purpose and usage of various Spring‑provided helper classes such as ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, ReflectionUtils, and AOP utilities, and provides code snippets illustrating their typical methods for validation, conversion, and reflection tasks in Java backend development.
This comprehensive guide walks through Spring’s fundamentals—including IoC, DI, core modules, common annotations, AOP concepts, transaction management, MVC workflow, and Spring Boot auto‑configuration—while also covering advanced topics such as bean lifecycle, circular dependencies, proxy mechanisms, and an introduction to Spring Cloud.
The article explains static and dynamic proxy patterns, demonstrates their Java implementations, and shows how Spring’s transaction management relies on dynamic AOP proxies—highlighting that internal calls within the same class bypass the proxy, preventing @Transactional methods from starting or rolling back transactions.
This guide explains Spring’s Assert utilities and a comprehensive set of core helper classes—including ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, AopUtils, and AopContext—detailing their purpose, typical use cases, and providing concise code examples for each method.
This article explains the design and implementation of a two‑level caching architecture using local Caffeine cache as L1 and remote Redis as L2 in Spring Boot, covering manual cache handling, annotation‑based management with Spring Cache, and a custom annotation with AOP to minimize code intrusion.
This guide explains how Spring Boot’s @Retryable annotation enables elegant, annotation‑driven retry logic, covering dependency setup, enabling retry, method annotation with configurable parameters, recovery handling via @Recover, and important AOP‑related considerations to avoid common pitfalls.
This article explains Spring's bean lifecycle, detailing how the framework resolves circular dependencies using a three‑level cache (singletonObjects, earlySingletonObjects, singletonFactories), and why a two‑level cache is insufficient, especially when AOP proxies are involved.
This article demonstrates how to create a request‑logging aspect in Spring Boot using AOP annotations, shows code for pointcuts, advices, high‑concurrency optimizations, exception handling, and trace‑ID propagation, and explains the underlying concepts and practical tips.
This Spring AOP tutorial explains how to modularize cross‑cutting concerns such as timing by defining an aspect with @Before, @After, @AfterReturning, @AfterThrowing and @Around advice, demonstrates refactoring a calculation service, and compares Spring’s proxy mechanisms to a custom JDK dynamic proxy implementation.
This article explains the background, concepts, and implementation details of Aspect‑Oriented Programming in Java, covering joinpoint interface design, advice abstraction, static and dynamic weaving, and how Spring AOP applies these principles with illustrative code and diagrams.
This article examines whether Go can achieve aspect‑oriented programming by comparing Java's AOP mechanisms, introducing the gohook library for runtime method interception, and demonstrating how to modify Go source code through AST transformations with concrete code examples.
This article explains how Spring's three‑level cache (singleton, early‑singleton, and singleton‑factory caches) works together with bean post‑processors to break circular dependencies and correctly create AOP proxies, while also showing how to disable circular references when needed.
This article explains three common situations where Spring's @Transactional annotation becomes ineffective—non‑public methods, internal self‑calls, and swallowed exceptions—detailing the underlying proxy mechanism, code examples, test results, and practical workarounds to ensure proper transaction management.
This article demonstrates how to create a Spring AOP request‑logging aspect that captures IP, URL, HTTP method, class method, parameters, results and execution time, and extends it with high‑concurrency handling, error logging, and TraceId propagation for better traceability.
This article explains the concept of Aspect‑Oriented Programming (AOP) and demonstrates how Python decorators—both function‑based and class‑based—can be used to implement AOP features such as pre‑ and post‑execution logic, handling arguments, preserving metadata with functools.wraps, and stacking multiple decorators.
This article explains how to create a Spring AOP request‑logging aspect, covering basic pointcut and advice definitions, parameter extraction, high‑concurrency optimizations with unified JSON logs, exception handling, and adding traceId support for end‑to‑end request tracing.
This article explains three common reasons why the @Transactional annotation may not work in Spring—non‑public methods, self‑invocation, and catching exceptions—provides code examples for each case, and details the underlying proxy and transaction management mechanisms to help developers resolve the issues.
This article explains Spring's bean lifecycle, the three‑level cache mechanism (singletonObjects, earlySingletonObjects, singletonFactories) used to break circular dependencies, the role of Aware interfaces and BeanPostProcessor, and why a second‑level cache is essential when AOP proxies are involved.
This article explains how Spring's @Transactional annotation works by leveraging AOP and dynamic proxies, detailing the bean post‑processor, pointcut definition, proxy creation, interceptor chain, TransactionInterceptor logic, and the transaction commit/rollback process with illustrative code snippets and diagrams.
