Aspectran 9.2 Release Notes

Aspectran 9.2 is a significant release focused on dramatically improving the framework’s stability, correctness, and performance. Through extensive refactoring of the internal architecture and several critical bug fixes, it provides a more robust and reliable foundation.

🚀 Key Enhancements

• Bean Scope Management and Concurrency Performance
  • Optimized the locking strategy when creating beans via FactoryBean, significantly reducing unnecessary contention and improving performance in concurrent environments. This ensures better throughput in multi-threaded applications.
  • Removed API restrictions on SessionScope to allow manual destruction of specific bean instances, increasing usability in scenarios like sticky sessions.
• Refactoring Across Core Components
  • Session Management: Refactored the Lettuce-based session store by abstracting common logic to reduce code duplication and modernized terminology from “Master-Replica” to “Primary-Replica”.
  • MyBatis Integration: Improved the internal structure of the MyBatis integration module by clarifying responsibilities and increasing maintainability.
  • Internal Logic: Enhanced the stability of several utility classes, such as introducing a JsonParser to separate JSON processing logic and improving error handling in RestRequest.
• Shell and Daemon Environment Stability
  • Greatly improved stability in the development environment by fixing several critical bugs that occurred during a shell restart.
  • Enhanced usability in scripted environments by allowing the quit command to exit immediately without a prompt in non-interactive mode, and optimized performance by caching interactive mode detection logic.
• Code Quality and Documentation
  • Significantly improved the developer experience by extensively adding and refining Javadoc comments across the project and making internal logging and user messages clearer and more consistent.
  • Clarified API roles by renaming the resource release method in EmbeddedAspectran from release() to destroy().

🐞 Key Bug Fixes

• Bean and Profile Configuration Correctness
  • Strengthened validation to prevent configuration errors by ignoring and issuing a warning if @Profile or other configuration annotations are used without the @Component annotation.
  • Fixed a critical bug in SessionScope that incorrectly matched beans by class name instead of ID, resolving unpredictable behavior, especially in clustered environments.
  • Resolved an issue where a NoUniqueBeanException would occur when multiple profiled beans were present, ensuring profile-based bean selection works correctly.
• Service Lifecycle Bugs
  • Shell Restart Failures: Fixed critical bugs that caused the shell to terminate unexpectedly or logging to fail after a restart command due to issues in the asynchronous shutdown process of the embedded Jetty server and Logback context handling.
  • Request Handling During Startup: Improved stability by making incoming requests wait for service startup to complete, instead of rejecting them.
• Other Important Fixes
  • Fixed a NotSerializableException in ConcurrencyThrottleSupport.
  • Fixed a bug where the Quartz scheduler was not created under certain conditions and added logic to prevent re-initialization.