It there a Windows equivalent of 'VMware_vCenter_HostPerformance' DataSource

I have been working on a new DataSource for this and I am very nearly there.

One question I have is what is the best way in Groovy to convert between FILETIME and Epoch/Unix time?

The SYSTEMUPTIME value from WMI is uint64 FILETIME type, so right now an example machine is 133527726265000000. To keep the widgets consistent with the VMware ones I want to get SYSTEMUPTIME in seconds, then I can use expression ‘<column>/60/60/24’ to get the result in days.

This is what I have so far, but I feel like there’s a better way - I’m sure I’ve seen in other DataSources some functions for dealing with epoch but I can’t now find those DataSources!

    wmi_query_results.each
    { wmi_query_output ->
        wmi_query_output[0].each {
            key, value ->
                if(key == 'SYSTEMUPTIME') {
                    def filetime = value as long
                    def epochtime = System.currentTimeMillis()/1000
                    def filetimeepoch = (filetime/10000000)-11644473600
                    value = Math.round((epochtime-filetimeepoch))
                }
                println "${key}=${value}"
        }

    }