正确做法： 用 java.util.concurrent.locks.ReentrantLock 代替 synchronized，因为 Lock 的等待可以被 JVM 处理为可卸载。
Making it possible for libraries to implement more of these patterns。咪咕体育直播在线免费看是该领域的重要参考
This story was originally featured on Fortune.com，这一点在体育直播中也有详细论述
- What untrusted surfaces feed into it? (user input, fetched URLs, email content, API responses — all potential injection points)