Application Insights Telemetry custom properties

[tonto7973]

Hi, I am wondering if there is currently any support for custom AI telemetry properties. I could not find any documentation describing this.

A log statement like this:

context.getLogger().info("Some message");

Shows under traces in Application Insights:

traces
| where message contains "Some message"

with customDimensions that read something like this:

{"HostInstanceId":"548cfa44-cbee-4a92-b930-a4ee99f63466","LogLevel":"Information","Category":"Function.HttpTrigger-Java.User","InvocationId":"ae9b0c4d-9111-4c31-b788-66fa3644d165","ProcessId":"7428"}

Is there a way to add any additional information to customDimensions from Java Azure Function?

Sample case - I'd like to capture some input information from HttpTrigger query, e.g. the id below:

http://localhost:7071/api/HttpTrigger-Java?id=1234

I do not know how to capture the id into customDimensions. I can capture it inside the actual message:

String id = request.getQueryParameters().get("id");
context.getLogger().info("Some message: " + id);

I'd ideally want to propagate such custom properties to any telemetry (traces, dependencies, customEvents, metrics) captured when the function is running. In C# Azure Function I can use Activity tags in combination with ITelemetryInitializer but I am not sure how to do this in Java Azure Function.

Thanks for your help.

[amamounelsayed]

cc @trask

[kaibocai]

Hi @tonto7973 , thanks for reaching out and apologies for the late reply. Application Insight provide you the ability to track your own events, metrics, traces and allow you to viem them in corrsponding customEvents, customMetric, traces on the portal. Below is an example of track customize metrics

import com.microsoft.applicationinsights.TelemetryClient;
import com.microsoft.azure.functions.HttpMethod;
import com.microsoft.azure.functions.HttpRequestMessage;
import com.microsoft.azure.functions.HttpResponseMessage;
import com.microsoft.azure.functions.HttpStatus;
import com.microsoft.azure.functions.annotation.AuthorizationLevel;
import com.microsoft.azure.functions.annotation.FunctionName;
import com.microsoft.azure.functions.annotation.HttpTrigger;

import java.util.Optional;

public class Function {
    private static final TelemetryClient telemetryClient = new TelemetryClient();

    @FunctionName("HttpExample")
    public HttpResponseMessage run(
            @HttpTrigger(
                    name = "req",
                    methods = {HttpMethod.GET, HttpMethod.POST},
                    authLevel = AuthorizationLevel.ANONYMOUS)
            HttpRequestMessage<Optional<String>> request) {

        telemetryClient.trackMetric("test", 123);

        telemetryClient.trackTrace("test");

        return request.createResponseBuilder(HttpStatus.OK).body("Hello world!").build();
    }
}

In the portal you can review it in the customMetric and traces as below