Support for OTEL Synchronous Gauge

[timronan]

Describe the bug
io.opentelemetry.extension.incubator.metrics.ExtendedDoubleGaugeBuilder does not seem to be supported by aws-otel-java-instrumentation because I cannot cast io.opentelemetry.javaagent.instrumentation.opentelemetryapi.v1_10.metrics.ApplicationDoubleGaugeBuilder to io.opentelemetry.extension.incubator.metrics.ExtendedDoubleGaugeBuilder following the example below and outlined in the and Add experimental synchronous gauge pull request.

Steps to reproduce

In my Dockerfile, I download the aws-opentelemetry-agent v1.31.0 by running:

ADD https://github.com/aws-observability/aws-otel-java-instrumentation/releases/download/v1.31.0/aws-opentelemetry-agent.jar /app/aws-opentelemetry-agent.jar

In my Observability class, I try to build and test a synchronous Gauge by running:

DoubleGauge gauge = ((ExtendedDoubleGaugeBuilder) meter.gaugeBuilder("my-gauge")).build();
gauge.set(1.0);

What did you expect to see?
I expect to see a metric named "my-gauge" that contains a double with a value of 1.0 passed to my Prometheus instance.

What did you see instead?

Exception in thread "main" java.lang.ClassCastException: class
io.opentelemetry.javaagent.instrumentation.opentelemetryapi.v1_10.metrics.ApplicationDoubleGaugeBuilder cannot be
cast to class io.opentelemetry.extension.incubator.metrics.ExtendedDoubleGaugeBuilder
(io.opentelemetry.javaagent.instrumentation.opentelemetryapi.v1_10.metrics.ApplicationDoubleGaugeBuilder and
io.opentelemetry.extension.incubator.metrics.ExtendedDoubleGaugeBuilder are in unnamed module of loader 'app')

Additional context
Any help you could provide would be greatly appreciated; thanks in advance.

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This issue was closed because it has been marked as stale for 30 days with no activity.