Add framework version (#387)

* add constant to store the framework version

* inject gofr version into metrics, logger, and trace

* revert metric scope to appName and version to appVersion

* change version to dev

Author: Vipul Rawat

pkg/gofr/http/middleware/tracer.go

@@ -7,6 +7,8 @@ import (
 
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/propagation"
+
+	"gofr.dev/pkg/gofr/version"
 )
 
 func Tracer(inner http.Handler) http.Handler {
@@ -19,8 +21,7 @@ func Tracer(inner http.Handler) http.Handler {
 		// its parentID, thus connecting two spans
 		ctx = otel.GetTextMapPropagator().Extract(ctx, propagation.HeaderCarrier(r.Header))
 
-		// TODO - inject version
-		tr := otel.GetTracerProvider().Tracer("gofr")
+		tr := otel.GetTracerProvider().Tracer("gofr-" + version.Framework)
 		ctx, span := tr.Start(ctx, fmt.Sprintf("%s %s", strings.ToUpper(r.Method), r.URL.Path))
 		defer span.End()
 

pkg/gofr/logging/logger.go

@@ -15,6 +15,7 @@ import (
 	"gofr.dev/pkg/gofr/grpc"
 	"gofr.dev/pkg/gofr/http/middleware"
 	"gofr.dev/pkg/gofr/service"
+	"gofr.dev/pkg/gofr/version"
 )
 
 const fileMode = 0644
@@ -45,9 +46,10 @@ type logger struct {
 }
 
 type logEntry struct {
-	Level   Level       `json:"level"`
-	Time    time.Time   `json:"time"`
-	Message interface{} `json:"message"`
+	Level       Level       `json:"level"`
+	Time        time.Time   `json:"time"`
+	Message     interface{} `json:"message"`
+	GofrVersion string      `json:"gofrVersion"`
 }
 
 func (l *logger) logf(level Level, format string, args ...interface{}) {
@@ -61,8 +63,9 @@ func (l *logger) logf(level Level, format string, args ...interface{}) {
 	}
 
 	entry := logEntry{
-		Level: level,
-		Time:  time.Now(),
+		Level:       level,
+		Time:        time.Now(),
+		GofrVersion: version.Framework,
 	}
 
 	switch {

pkg/gofr/metrics/exporters/exporter.go

@@ -1,11 +1,14 @@
 package exporters
 
 import (
+	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/exporters/prometheus"
 	"go.opentelemetry.io/otel/metric"
 	metricSdk "go.opentelemetry.io/otel/sdk/metric"
 	"go.opentelemetry.io/otel/sdk/resource"
 	semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
+
+	"gofr.dev/pkg/gofr/version"
 )
 
 func Prometheus(appName, appVersion string) metric.Meter {
@@ -19,6 +22,7 @@ func Prometheus(appName, appVersion string) metric.Meter {
 		metricSdk.WithResource(resource.NewWithAttributes(
 			semconv.SchemaURL,
 			semconv.ServiceNameKey.String(appName),
+			attribute.String("framework_version", version.Framework),
 		))).Meter(appName, metric.WithInstrumentationVersion(appVersion))
 
 	return meter

pkg/gofr/version/version.go

@@ -0,0 +1,3 @@
+package version
+
+const Framework = "dev"