Adding Metrics from within the Application

[Taragos]

Hello,

I am using the Opentelemetry-Javaagent to observe a Karaf-based application.
The collection/exporting of the traces works perfectly and I can also access the Spans from within the application to add attributes or retrieve the current traceId to add it to the logs.

I now wanted to add some application-specific metrics, for example how often a certain file was openend etc. and export them via the opentelemetry-javaagent.

I tried to access the javaagents-meter with the following code, but failed to add metrics to it (they didn't show up)

    private static final MeterProvider meterProvider = MeterProvider.noop();
    private static final Meter meter = meterProvider.get("io.opentelemetry.javaagent.opentelemetry-javaagent");
    private static final LongCounter counter = meter.counterBuilder("status_calls").setDescription("Number of Times Status was called").setUnit("1").build();

    ....

    counter.add(1)

Javaagent Version: 1.10.0
Opentelemetry API Version: 1.10.0

Is this possible? If yes, how could I implement something like this this?

[laurit]

Instead of MeterProvider.noop() try with GlobalOpenTelemetry.getMeterProvider()

[Taragos]

Worked like a charm, thanks!