fix(async-io): check for __name__ attribute when tracing coroutine

[povilasv]

Description

This PR takes over stale PR #2353.

Basically we need to check if coroutine has name attribute before trying to trace, as not all coroutines have this attribute. More details are in the issue.

I've applied suggestions from @xrmx comment in here #2353 (review)

Fixes #2340

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Added unit test. Ran the test without the fix and it fails with the following error:

self = <opentelemetry.instrumentation.asyncio.AsyncioInstrumentor object at 0x79c618a75d60>
coro = <async_generator_asend object at 0x79c618a6d0c0>

    async def trace_coroutine(self, coro):
        start = default_timer()

        attr = {
            "type": "coroutine",
>           "name": coro.__name__,
        }
E       AttributeError: 'async_generator_asend' object has no attribute '__name__'. Did you mean: '__ne__'?

instrumentation/opentelemetry-instrumentation-asyncio/src/opentelemetry/instrumentation/asyncio/__init__.py:268: AttributeError

With the fix the unit test passes.

Does This PR Require a Core Repo Change?

• Yes. - Link to PR:
• No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• Followed the style guidelines of this project
• Changelogs have been updated
• Unit tests have been added
• Documentation has been updated

[xrmx]

@povilasv please fix conflicts

[povilasv]

@xrmx done 👍

[povilasv]

Anything I can do to help move this forward? Would appreciate if this would make it to next release 🙇

[aabmass]

Thanks for the fix!

[xrmx]

Shouldn't return coro here?

[povilasv]

Good point, wip -> #2541

somehow demo app (python anext.py) works in both cases 🤔