stabilize to 0.1.0 with stablization of otel http metric conventions

update docs with new constructor signature

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "tower-otel-http-metrics"
 edition = "2021"
-version = "0.1.0-alpha.3"
+version = "0.1.0"
 license = "MIT"
 description = "OpenTelemetry Metrics Middleware for Tower-compatible Rust HTTP servers"
 homepage = "https://github.com/francoposa/tower-otel-http-metrics"

README.md

@@ -69,7 +69,7 @@ async fn main() {
 
     // init our otel metrics middleware
     let otel_metrics_service_layer =
-        tower_otel_http_metrics::HTTPMetricsLayer::new(String::from(SERVICE_NAME), None);
+        tower_otel_http_metrics::HTTPMetricsLayer::new(String::from(SERVICE_NAME));
 
     let app = Router::new()
         .route("/", get(handle))
@@ -146,7 +146,7 @@ async fn main() {
 
     // init our otel metrics middleware
     let otel_metrics_service_layer =
-        tower_otel_http_metrics::HTTPMetricsLayer::new(String::from(SERVICE_NAME), None);
+        tower_otel_http_metrics::HTTPMetricsLayer::new(String::from(SERVICE_NAME));
 
     let service = ServiceBuilder::new()
         .layer(otel_metrics_service_layer)

examples/axum-http-service/src/main.rs

@@ -51,7 +51,7 @@ async fn main() {
 
     // init our otel metrics middleware
     let otel_metrics_service_layer =
-        tower_otel_http_metrics::HTTPMetricsLayer::new(String::from(SERVICE_NAME), None);
+        tower_otel_http_metrics::HTTPMetricsLayer::new(String::from(SERVICE_NAME));
 
     let app = Router::new()
         .route("/", get(handle))

examples/tower-http-service/src/main.rs

@@ -53,7 +53,7 @@ async fn main() {
 
     // init our otel metrics middleware
     let otel_metrics_service_layer =
-        tower_otel_http_metrics::HTTPMetricsLayer::new(String::from(SERVICE_NAME), None);
+        tower_otel_http_metrics::HTTPMetricsLayer::new(String::from(SERVICE_NAME));
 
     let service = ServiceBuilder::new()
         .layer(otel_metrics_service_layer)

src/lib.rs

@@ -24,7 +24,7 @@ use opentelemetry_api::global;
 use pin_project_lite::pin_project;
 use tower::{Layer, Service};
 
-const HTTP_SERVER_DURATION_METRIC: &str = "http.server.duration";
+const HTTP_SERVER_DURATION_METRIC: &str = "http.server.request.duration";
 
 const HTTP_REQUEST_METHOD_LABEL: &str = "http.request.method";
 const HTTP_ROUTE_LABEL: &str = "http.route";
@@ -56,17 +56,13 @@ pub struct HTTPMetricsLayer {
 }
 
 impl HTTPMetricsLayer {
-    // TODO convert this to a bunch of "with_whatever()" methods
-    pub fn new(service_name: String, server_duration_metric_name: Option<String>) -> Self {
+    pub fn new(service_name: String) -> Self {
         let meter = global::meter(service_name);
-
-        let mut _server_duration_metric_name = Cow::from(HTTP_SERVER_DURATION_METRIC);
-        if let Some(name) = server_duration_metric_name {
-            _server_duration_metric_name = name.into();
-        }
         HTTPMetricsLayer {
             state: Arc::from(HTTPMetricsLayerState {
-                server_request_duration: meter.u64_histogram(_server_duration_metric_name).init(),
+                server_request_duration: meter
+                    .u64_histogram(Cow::from(HTTP_SERVER_DURATION_METRIC))
+                    .init(),
             }),
         }
     }