uptime.kt

package com.company.core.logging
import org.apache.logging.log4j.core.LogEvent
import org.apache.logging.log4j.core.config.plugins.Plugin
import org.apache.logging.log4j.core.lookup.StrLookup
import java.time.Instant
@Plugin(name = "uptime", category = StrLookup.CATEGORY)
class UptimeLoockup : StrLookup {
    companion object {
        var startTime: Instant = Instant.now()
    }
    override fun lookup(key: String?): String {
        return upTime(key ?: "seconds")
    }
    override fun lookup(event: LogEvent?, key: String?): String {
        return upTime(key ?: "seconds")
    }
    private fun upTime(key: String): String {
        return (if (key == "seconds")
            startTime.epochSecond.let { (Instant.now().epochSecond - it).toString() }
        else startTime.toEpochMilli().let { (Instant.now().toEpochMilli() - it).toString() })
    }
}