make the proxy tracer compatible with opentracing shim

zalando / opentracing-toolbox

Best-of-breed OpenTracing utilities, instrumentations and extensions

MIT License

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make the proxy tracer compatible with opentracing shim #740

Closed zeitlinger closed 2 years ago

zeitlinger commented 2 years ago

let ForwardingSpan implement Supplier<Span>to support the opentracing shim - see https://github.com/open-telemetry/opentelemetry-java/pull/4535

A unit test doesn't really make sense - then OpenTracing shim changes are not even merged yet. The feature has been tested locally (which locally built artifacts).