Emit Profiler start/stop events (#1706)

Author: johnoliver

core/src/main/java/com/microsoft/applicationinsights/internal/profiler/ProfilerServiceInitializer.java

@@ -33,6 +33,7 @@
 import com.microsoft.applicationinsights.profiler.config.AlertConfigParser;
 import com.microsoft.applicationinsights.profiler.config.ServiceProfilerServiceConfig;
 import com.microsoft.applicationinsights.telemetry.EventTelemetry;
+import com.microsoft.applicationinsights.telemetry.TraceTelemetry;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -162,19 +163,23 @@ static UploadCompleteHandler sendServiceProfilerIndex(TelemetryClient telemetryC
             event.getProperties().putAll(done.getServiceProfilerIndex().getProperties());
             event.getMetrics().putAll(done.getServiceProfilerIndex().getMetrics());
             telemetryClient.track(event);
+            // This is an event that the backend specifically looks for to track when a profile is complete
+            telemetryClient.track(new TraceTelemetry("StopProfiler succeeded."));
         };
     }
 
     static AlertingSubsystem createAlertMonitor(
             ScheduledExecutorService alertServiceExecutorService,
             TelemetryClient telemetryClient,
             GcEventMonitor.GcEventMonitorConfiguration gcEventMonitorConfiguration) {
-        return AlertingServiceFactory.create(alertAction(), TelemetryObservers.INSTANCE, telemetryClient, alertServiceExecutorService, gcEventMonitorConfiguration);
+        return AlertingServiceFactory.create(alertAction(telemetryClient), TelemetryObservers.INSTANCE, telemetryClient, alertServiceExecutorService, gcEventMonitorConfiguration);
     }
 
-    private static Consumer<AlertBreach> alertAction() {
+    private static Consumer<AlertBreach> alertAction(TelemetryClient telemetryClient) {
         return alert -> {
             if (profilerService != null) {
+                // This is an event that the backend specifically looks for to track when a profile is started
+                telemetryClient.track(new TraceTelemetry("StartProfiler triggered."));
                 profilerService.getProfiler().accept(alert);
             }
         };