Hono Plugin

[ludu12]

What does this PR do?

Adds a simple plugin for the hono API framework.

Motivation

We'd like to use this framework with datadog but found the instrumentation for requests was missing the route path.

Plugin Checklist

• Unit tests.
• TypeScript definitions.
• TypeScript tests.
• API documentation.
• CircleCI jobs/workflows.
• Plugin is exported.

Additional Notes

Middleware instrumentation is not setup.

[MMShep97]

For the dd-trace maintainers, I wanted to link this support ticket opened a few days ago pertaining to this subject:

https://help.datadoghq.com/hc/en-us/requests/1897368

Thanks! :D

[beeequeue]

Is there anything I can do to help with this?

[ludu12]

@beeequeue honestly if you have some more thoughts on how best to instrument hono in a more robust, let us know! I sort of just found the dispatch and compose functions to be a decent starting point, but its no where near the instrumentation that express is. For instance, I think express automatically instruments entering/exiting middleware functions and such, right now we aren't publishing those types of events.

Also this PR is missing esm support I think which may be why integration tests fail. Honestly unsure how integration tests work fully.

We know Datadog has a feature request for this but not sure where that is