前言
Notify和Listen是Postgresql提供的不同会话间异步消息通信功能,例子:
LISTEN virtual;
NOTIFY virtual;
Asynchronous notification "virtual" received from server process with PID 8448.
NOTIFY virtual, This is the payload;
Asy…
sleep原理
sleep是Thread类中的静态方法,首先看下sleep的源码
/*** Causes the currently executing thread to sleep (temporarily cease* execution) for the specified number of milliseconds, subject to* the precision and accuracy of system timers and …