Add TrackAvailability method

[Orekhov]

TrackAvailability method is very useful in cases when availability tests feature can't be used. It is available in the .NET package, but is missing in node.js.

This method is very valuable to have in node.js as this platform is used a lot for writing tests. (We already have a few cases, where it is required)

[OsvaldoRosado]

It would be great to add this!

In the meantime while a method is not available to generate an Availability telemetry item for you, you can construct one manually using the SDK's exposed contracts. Here's a rough example:

const appInsights = require("applicationinsights");

appInsights.setup("IKEY").start();

const availabilityTelemetry = new appInsights.Contracts.AvailabilityData();
availabilityTelemetry.id = (Math.random() * 100000).toString();
availabilityTelemetry.name = "Test Availability";
availabilityTelemetry.duration = "00.00:00:1.300000";
availabilityTelemetry.success = true;
availabilityTelemetry.runLocation = "My location";
availabilityTelemetry.message = "Sample diagnostic message";
availabilityTelemetry.measurements = {};
availabilityTelemetry.properties = {'Custom property': 'Value'};

const availabilityData = new appInsights.Contracts.Data();
availabilityData.baseData = availabilityTelemetry;
availabilityData.baseType = "AvailabilityData";

const availabilityEnvelope = new appInsights.Contracts.Envelope();
availabilityEnvelope.data = availabilityData;
availabilityEnvelope.time = new Date().toISOString();
availabilityEnvelope.ver = 1;
availabilityEnvelope.iKey = appInsights.defaultClient.config.instrumentationKey;
availabilityEnvelope.name = "Microsoft.ApplicationInsights.Availability";

appInsights.defaultClient.channel.send(availabilityEnvelope);

For any of the fields used above, your IDE should give you inline documentation for what the field is used for, and what formatting it expects (such as the string format for the duration field).

[devaradhanm]

@OsvaldoRosado , is there any update on this issue?