Capturing thoughts and reflections while coding.
This article explains the seven Java garbage collectors available up to JDK 1.8, compares their strengths and weaknesses, and shows how to select and tune the appropriate collector—Serial, Parallel, CMS, or G1—based on application characteristics and deployment environments.
This article dissects Netty's custom FastThreadLocal and FastThreadLocalThread implementations, showing how they replace JDK ThreadLocal with constant‑time indexed access, padding to avoid false sharing, and customizable initialization and cleanup to boost backend concurrency performance.
The article explains a 14‑hour discrepancy between MySQL's created_time and recovery_time timestamps, analyzes JVM and driver timezone settings, traces MyBatis and MySQL driver conversions, and provides practical fixes by adjusting MySQL server and JDBC URL timezones.
After discovering misconfigurations in a Spring Boot project’s QuartzJobBean implementation, this article examines the root causes, compares legacy and modern Spring solutions—including custom JobFactory, AutowireCapableBeanFactory, and the spring-boot-starter-quartz starter—and provides detailed code examples to correctly integrate Quartz with Spring’s IoC container.
