Freaks City

@Intercepts({ @Signature(type = StatementHandler.class, method = "prepare", args = {Connection.class, Integer.class}) }) @Component public class SoftDeleteInterceptor implements Interceptor { @Override public Object intercept(Invocation invocation) throws Throwable { StatementHandler handler = (StatementHandler) in ...

JSON Web Tokens consist of three distinct segments: a header defining cryptographic parameters, a payload carrying assertions, and a signature ensuring integrity. Implementing token validation in a Spring ecosystem requires orchestrating token generation, externalized configuration, request interception, and MVC registration. The following guid ...

When implementing a custom interceptor in a Spring Boot application to validate specific parameters, an exception Required request body is missing may occur. This issue typically arises after adding an interceptor that reads the request body, causing subsequent attempts to read the body (such as via @RequestBody) to fail. The root cause is that ...

Problem Statement In a flash sale system, I encountered a scenario where one aspect handles Redis-based distributed locking and rate limiting, while another aspect is responsible for publishing order messages to a message queue. The core challenge: how to transmit data computed in the first aspect to the second aspect for further processing. So ...

Core Concepts of Interceptors In Spring applications, interceptors serve as middleware components designed to execute custom logic before or after HTTP requests are processed. Unlike Aspect-Oriented Programming (AOP), which targets method-level cross-cutting concerns, interceptors specifically focus on the request processing pipeline. Intercept ...

Database SchemaTable CreationCREATE TABLE `request_audit_log` ( `log_id` BIGINT NOT NULL AUTO_INCREMENT, `created_at` DATETIME NOT NULL COMMENT 'Request timestamp', `client_ip` VARCHAR(30) NOT NULL COMMENT 'Client IP address', `api_category` VARCHAR(50) NOT NULL DEFAULT 'General' COMMENT 'API category', `endpoint_url` VARCHAR(100) NOT ...

Design Approach Upon successful login, generate a token using the userId and have the frontend store it. When subsequent requests reach the gateway, create a filter to parse userId from the token and inject it into the request headers. Once the request arrives at the target service, create an interceptor to extract userId from the headers, fet ...