31 lines
1.0 KiB
Markdown
31 lines
1.0 KiB
Markdown
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The [New Relic Go Agent](https://github.com/newrelic/go-agent) provides a nice middleware for the stdlib handler signature.
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The following is an adaptation of that middleware for Gin.
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```golang
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const (
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// NewRelicTxnKey is the key used to retrieve the NewRelic Transaction from the context
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NewRelicTxnKey = "NewRelicTxnKey"
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)
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// NewRelicMonitoring is a middleware that starts a newrelic transaction, stores it in the context, then calls the next handler
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func NewRelicMonitoring(app newrelic.Application) gin.HandlerFunc {
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return func(ctx *gin.Context) {
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txn := app.StartTransaction(ctx.Request.URL.Path, ctx.Writer, ctx.Request)
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defer txn.End()
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ctx.Set(NewRelicTxnKey, txn)
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ctx.Next()
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}
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}
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```
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and in `main.go` or equivalent...
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```golang
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router := gin.Default()
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cfg := newrelic.NewConfig(os.Getenv("APP_NAME"), os.Getenv("NEW_RELIC_API_KEY"))
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app, err := newrelic.NewApplication(cfg)
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if err != nil {
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log.Printf("failed to make new_relic app: %v", err)
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} else {
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router.Use(adapters.NewRelicMonitoring(app))
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}
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```
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