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Example using both HTTP and SQL

This example illustrates what happens when you use multiple wrappers - specifically one from the HTTP layer accepting incoming requests and one wrapping DB access. Not only do you get one event for the incoming request and an event for each DB call, but (because the context is passed all the way down) the events are connected using a Trace ID and the outer HTTP event gets a few extra fields indicating how much total time was spent in the DB for that request.

This example is runnable with go run main.go - it will start listening on port 8080.

Once it's running, in another window, issue a request to the /hello/ endpoint: curl localhost:8080/hello/ and you should see several events appear on STDOUT in the pane running the example.

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