diff --git a/examples/new_relic/README.md b/examples/new_relic/README.md new file mode 100644 index 00000000..70f14942 --- /dev/null +++ b/examples/new_relic/README.md @@ -0,0 +1,30 @@ +The [New Relic Go Agent](https://github.com/newrelic/go-agent) provides a nice middleware for the stdlib handler signature. +The following is an adaptation of that middleware for Gin. + +```golang +const ( + // NewRelicTxnKey is the key used to retrieve the NewRelic Transaction from the context + NewRelicTxnKey = "NewRelicTxnKey" +) + +// NewRelicMonitoring is a middleware that starts a newrelic transaction, stores it in the context, then calls the next handler +func NewRelicMonitoring(app newrelic.Application) gin.HandlerFunc { + return func(ctx *gin.Context) { + txn := app.StartTransaction(ctx.Request.URL.Path, ctx.Writer, ctx.Request) + defer txn.End() + ctx.Set(NewRelicTxnKey, txn) + ctx.Next() + } +} +``` +and in `main.go` or equivalent... +```golang +router := gin.Default() +cfg := newrelic.NewConfig(os.Getenv("APP_NAME"), os.Getenv("NEW_RELIC_API_KEY")) +app, err := newrelic.NewApplication(cfg) +if err != nil { + log.Printf("failed to make new_relic app: %v", err) +} else { + router.Use(adapters.NewRelicMonitoring(app)) +} + ``` diff --git a/examples/new_relic/main.go b/examples/new_relic/main.go new file mode 100644 index 00000000..f85f7831 --- /dev/null +++ b/examples/new_relic/main.go @@ -0,0 +1,42 @@ +package main + +import ( + "log" + "net/http" + "os" + + "github.com/gin-gonic/gin" + "github.com/newrelic/go-agent" +) + +const ( + // NewRelicTxnKey is the key used to retrieve the NewRelic Transaction from the context + NewRelicTxnKey = "NewRelicTxnKey" +) + +// NewRelicMonitoring is a middleware that starts a newrelic transaction, stores it in the context, then calls the next handler +func NewRelicMonitoring(app newrelic.Application) gin.HandlerFunc { + return func(ctx *gin.Context) { + txn := app.StartTransaction(ctx.Request.URL.Path, ctx.Writer, ctx.Request) + defer txn.End() + ctx.Set(NewRelicTxnKey, txn) + ctx.Next() + } +} + +func main() { + router := gin.Default() + + cfg := newrelic.NewConfig(os.Getenv("APP_NAME"), os.Getenv("NEW_RELIC_API_KEY")) + app, err := newrelic.NewApplication(cfg) + if err != nil { + log.Printf("failed to make new_relic app: %v", err) + } else { + router.Use(NewRelicMonitoring(app)) + } + + router.GET("/", func(c *gin.Context) { + c.String(http.StatusOK, "Hello World!\n") + }) + router.Run() +} diff --git a/go.mod b/go.mod index 54573a8b..6f9d68d1 100644 --- a/go.mod +++ b/go.mod @@ -24,6 +24,7 @@ exclude ( github.com/gin-gonic/autotls v0.0.0-20190119125636-0b5f4fc15768 github.com/jessevdk/go-assets v0.0.0-20160921144138-4f4301a06e15 github.com/manucorporat/stats v0.0.0-20180402194714-3ba42d56d227 + github.com/newrelic/go-agent v2.5.0+incompatible github.com/thinkerou/favicon v0.1.0 golang.org/x/crypto v0.0.0-20190123085648-057139ce5d2b golang.org/x/lint v0.0.0-20181217174547-8f45f776aaf1