public enable()

in AutoCollection/NativePerformance.ts [55:96]
34 lines of code
13 McCabe index (conditional complexity)

    public enable(isEnabled: boolean, disabledMetrics: IDisabledExtendedMetrics = {}, collectionInterval = 60000): void {
        if (!AutoCollectNativePerformance.isNodeVersionCompatible()) {
            return;
        }

        if (AutoCollectNativePerformance._metricsAvailable == undefined && isEnabled && !this._isInitialized) {
            // Try to require in the native-metrics library. If it's found initialize it, else do nothing and never try again.
            try {
                const NativeMetricsEmitters = require("applicationinsights-native-metrics");
                AutoCollectNativePerformance._emitter = new NativeMetricsEmitters();
                AutoCollectNativePerformance._metricsAvailable = true;
                Logging.info("Native metrics module successfully loaded!");
            } catch (err) {
                // Package not available. Never try again
                AutoCollectNativePerformance._metricsAvailable = false;
                return;
            }
        }

        this._isEnabled = isEnabled;
        this._disabledMetrics = disabledMetrics
        if (this._isEnabled && !this._isInitialized) {
            this._isInitialized = true;
        }

        // Enable the emitter if we were able to construct one
        if (this._isEnabled && AutoCollectNativePerformance._emitter) {
            // enable self
            AutoCollectNativePerformance._emitter.enable(true, collectionInterval);
            if (!this._handle) {
                this._handle = setInterval(() => this._trackNativeMetrics(), collectionInterval);
                this._handle.unref();
            }
        } else if (AutoCollectNativePerformance._emitter) {
            // disable self
            AutoCollectNativePerformance._emitter.enable(false);
            if (this._handle) {
                clearInterval(this._handle);
                this._handle = undefined;
            }
        }
    }