Application uptime placeholder

[dzikoysk]

It could be great to have a placeholder that represents the current uptime of application, e.g. {uptime}. The init time may be the same as the logger initialization time.

Even if you don't like this proposal, it might be solved by the posiblity of being able to register custom placeholder.

[pmwmedia]

A pull request for an {uptime} placeholder is welcome :-) I think the up time placeholder could be formatted via the same format pattern syntax as the existing {date} placeholder.

[pmwmedia]

API for plain Java:
java.lang.management.ManagementFactory.getRuntimeMXBean().getUptime()

API for Android:
android.os.SystemClock.uptimeMillis()

[dzikoysk]

Yeah, I was thinking about ManagementFactory, but it also counts JVM startup time. On the other hand maybe it could be better to separate relative uptime for each logger instance 🤔

{uptime} - ManagementFactory/SystemClock
{relative-uptime} - initialized when logger is created

The first one is obvious, but in fact, the second one is much more useful.

[pmwmedia]

The use case for JVM up time is obvious for me. However, what is the use case for logger instances up times?

[dzikoysk]

Oh, I had to miss the notification about your response, sorry, I have a lot of them. Anyway, thanks for the implementation ❤️

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