Tracing entry and exit points for your methods can provide valuable information for diagnosing a problem and the calls that led up to it.
在入口点和出口点跟踪方法可以为诊断问题以及导致该问题的调用提供有用的信息。
Synchronized methods and blocks allow a thread to lock an object on entry and unlock the object on exit (to the method or block).
同步的方法和代码块允许线程在入口处锁定对象并在出口处解锁(针对方法或代码块)。
The Tracing aspect contains before and after advice for methods and constructors, meaning that both entry and exit is traced.
追踪方面包含了方法和构造器的before和after Advice，这意味着入口和出口都被追踪了。
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