Monitor Fast HTTP in Go Applications with Atatus Go Agent

Installation steps

Install Atatus Go Agent and framework module

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```
go get go.atatus.com/agent
go get go.atatus.com/agent/module/atfasthttp
```

Set up tracer and add Atatus middleware

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import (
    "github.com/valyala/fasthttp"
    "github.com/fasthttp/router"

    "go.atatus.com/agent"
    "go.atatus.com/agent/module/atfasthttp"
)

func main() {
    // Initialize Atatus tracer using environment variables
    tracer := atatus.DefaultTracer
    tracer.Service.LicenseKey = os.Getenv("ATATUS_LICENSE_KEY")
    tracer.Service.AppName = os.Getenv("ATATUS_APP_NAME")
    tracer.Service.Tracing = os.Getenv("ATATUS_TRACING")
    tracer.Service.Analytics = os.Getenv("ATATUS_ANALYTICS")

    // Example FastHTTP handler
    router := router.New()
    router.GET("/example", handleRequest)

    // Register HTTP handlers with Atatus APM monitoring using atfasthttp.Wrap
    wrappedHandler := atfasthttp.Wrap(router.Handler)

    // Pass the wrapped Handler to listenAndServe Method
    err := fasthttp.ListenAndServe(":8080", wrappedHandler)
}

func handleRequest(ctx *fasthttp.RequestCtx)  {
    // The context from ctx should be propagated to downstream operations,
    // such as database queries and external HTTP API calls

    _ = db.QueryContext(ctx, "SELECT 'Atatus!'").Scan(&greeting)
}

Clean Up and Sync Dependencies

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```
go mod tidy
```
Run the Application

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```
go run main.go
```