go-age | An age calculator for Golang | Apps library

Avoid using a global context, rather create one at the entrypoint and then just pass it as an argument to any function that needs it.

You can make use of the nrgin package provided by the Gin framework.

And in the main() function

• Create an instance of newrelic - newrelic.NewApplication(cfg)
• Call the - nrgin.Middleware(app) function passing in the newrelic instance. This will add the Gin transaction context key - newRelicTransaction to the context.
• Register the function in step 2 as a middleware for all your routes - router.Use(nrgin.Middleware(app))

You can then pass this same context object to your other functions that can accept a parameter of type context.Context since gin.Context is simply implementing the context interface of Go.

Example code