telemetry

VSCodeTelemetryExample.ts

const vscode = require('vscode');
const TelemetryReporter = require('vscode-extension-telemetry');

// events are in format username/extensionId/action
const extensionId = '<your extension unique name>';

const extension = extensions.getExtension(extensionId)!;
const extensionVersion = extension.packageJSON.version

// the application insights key
// its not a password, just a identifier (you can hardcode it into your extension without worry)
// but you might want to obfuscate it so bots that scan github dont pick up on it
const key = '<your key>'; 

// telemetry reporter 
let reporter;

function activate(context: vscode.ExtensionContext) {
   ...
   // create telemetry reporter on extension activation
   reporter = new TelemetryReporter(extensionId, extensionVersion, key);
   // ensure it gets property disposed
   context.subscriptions.push(reporter);
   ...
}

function deactivate() {
  // This will ensure all pending events get flushed
   reporter.dispose();
}

...
// send event any time after activation
reporter.sendTelemetryEvent('sampleEvent', { 'stringProp': 'some string' }, { 'numericMeasure': 123});