Detect OS Sleep and Wake Up events in Java

Question

Is there a way for a Java program to detect when the operating system is about to go to sleep, or failing that, at least detecting a wake up? The actual problem is that in a particular application a number of MySQL database operations are run in the background. In testing on a Windows machine these database transactions are interrupted after a sleep/wake-up cycle causing a ton of error conditions in the program. These errors typically look something like this: ``` java.net.SocketException MESSAGE: Software caused connection abort: recv failed ``` If we could react to a 'will sleep soon' event we could attempt to pause background operations preempting the problem. Less ideally if we could react to a 'just woke up' event we could at least suppress the error messages.

Accepted Answer

You could detect the wakeup by periodically comparing the current system time to the previous system time.

Edit: here's an example that looks like it would help you detect when the machine is going to sleep: http://www.codeguru.com/cpp/w-p/system/messagehandling/article.php/c6907

Detect OS Sleep and Wake Up events in Java

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