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The article compares four techniques—manual ThreadLocal copying, TaskDecorator, InheritableThreadLocal, and Alibaba's TransmittableThreadLocal—for passing user context and other data from parent to child threads in Spring Boot async execution, recommending the TaskDecorator and TransmittableThreadLocal approaches for production use.
The article presents a comprehensive design for third‑party APIs that protects against data tampering, replay attacks, and unauthorized access by using AK/SK key pairs, timestamp and nonce signatures, TLS encryption, fine‑grained permission models, rate limiting, idempotency handling, versioning, standardized response formats, and detailed implementation examples in Java.
The article explains how to troubleshoot extreme CPU usage in MySQL and Java processes, detailing step‑by‑step diagnostics with top, show processlist, jstack, and practical fixes such as adding missing indexes, disabling slow logs, using caches, and correcting busy‑loop code to bring CPU consumption back to normal levels.
This article enumerates fifteen common SpringBoot startup extension points, explains their positions in the bean lifecycle, illustrates each with concrete code snippets and usage scenarios, and provides a visual call‑order diagram to help developers harness these hooks for custom initialization and middleware development.
The article examines how Java Stream and Lambda, while designed for concise and expressive code, often become sources of unreadable and hard‑to‑maintain implementations, and it offers concrete refactoring techniques, proper use of Optional, and cautions about ParallelStream performance.
The article examines the benefits and hidden risks of using distributed caches, analyzes real‑world failure cases from Facebook, Google and AWS, and provides detailed strategies to mitigate availability and consistency problems through careful refresh policies, incremental updates, and compensation mechanisms.
This guide walks through building robust API controller interfaces by covering request signing, RSA encryption, IP whitelisting, rate limiting, parameter validation, unified response formats, exception handling, logging, idempotent design, request size limits, stress testing, asynchronous processing, data masking, and comprehensive documentation.
This guide explains why online file preview is needed, introduces the open‑source kkFileView solution built on Spring Boot, and walks through installing it via source or Docker, configuring the preview API, and testing various document formats directly in a browser.
The article shows how to avoid database pressure by recording daily comment counts in Redis sorted sets, merging the seven daily sets into a weekly ranking with a union command, and exposing the result through a Spring Boot service and a custom Freemarker tag, complete with code examples and screenshots.
This article walks through nine practical techniques—default filters, smaller page sizes, fewer joins, index tuning, straight_join, data archiving, efficient count(*), ClickHouse offloading, and read/write splitting—to dramatically improve the performance of pagination APIs handling millions of product records.
