init()

in Sources/SystemMetrics/SystemMetrics.swift [56:79]

• 21 lines of code
• 2 McCabe index (conditional complexity)

        init(config: SystemMetrics.Configuration) {
            self.timeInterval = config.interval
            self.dataProvider = config.dataProvider
            self.labels = config.labels
            self.timer = DispatchSource.makeTimerSource(queue: self.queue)

            self.timer.setEventHandler(handler: DispatchWorkItem(block: { [weak self] in
                guard let self = self, let metrics = self.dataProvider() else { return }
                Gauge(label: self.labels.label(for: \.virtualMemoryBytes)).record(metrics.virtualMemoryBytes)
                Gauge(label: self.labels.label(for: \.residentMemoryBytes)).record(metrics.residentMemoryBytes)
                Gauge(label: self.labels.label(for: \.startTimeSeconds)).record(metrics.startTimeSeconds)
                Gauge(label: self.labels.label(for: \.cpuSecondsTotal)).record(metrics.cpuSeconds)
                Gauge(label: self.labels.label(for: \.maxFileDescriptors)).record(metrics.maxFileDescriptors)
                Gauge(label: self.labels.label(for: \.openFileDescriptors)).record(metrics.openFileDescriptors)
            }))

            self.timer.schedule(deadline: .now() + self.timeInterval, repeating: self.timeInterval)

            if #available(OSX 10.12, *) {
                self.timer.activate()
            } else {
                self.timer.resume()
            }
        }