feat(metrics): add response metrics (#1263)

crates/router/src/compatibility/wrap.rs

@@ -25,13 +25,21 @@ where
     Q: Serialize + std::fmt::Debug + 'a,
     S: TryFrom<Q> + Serialize,
     E: Serialize + error_stack::Context + actix_web::ResponseError + Clone,
+    U: auth::AuthInfo,
     error_stack::Report<E>: services::EmbedError,
     errors::ApiErrorResponse: ErrorSwitch<E>,
     T: std::fmt::Debug,
     A: AppStateInfo,
 {
-    let resp: common_utils::errors::CustomResult<_, E> =
-        api::server_wrap_util(state, request, payload, func, api_authentication).await;
+    let resp: common_utils::errors::CustomResult<_, E> = api::server_wrap_util(
+        &router_env::Flow::CompatibilityLayerRequest,
+        state,
+        request,
+        payload,
+        func,
+        api_authentication,
+    )
+    .await;
     match resp {
         Ok(api::ApplicationResponse::Json(router_resp)) => {
             let pg_resp = S::try_from(router_resp);

crates/router/src/core/admin.rs

@@ -12,6 +12,7 @@ use crate::{
         payments::helpers,
     },
     db::StorageInterface,
+    routes::metrics,
     services::api as service_api,
     types::{
         self, api,
@@ -378,10 +379,11 @@ pub async fn create_payment_connector(
         }
         None => None,
     };
+
     let merchant_connector_account = storage::MerchantConnectorAccountNew {
         merchant_id: Some(merchant_id.to_string()),
         connector_type: Some(req.connector_type.foreign_into()),
-        connector_name: Some(req.connector_name),
+        connector_name: Some(req.connector_name.to_owned()),
         merchant_connector_id: utils::generate_id(consts::ID_LENGTH, "mca"),
         connector_account_details: req.connector_account_details,
         payment_methods_enabled,
@@ -406,6 +408,15 @@ pub async fn create_payment_connector(
             },
         )?;
 
+    metrics::MCA_CREATE.add(
+        &metrics::CONTEXT,
+        1,
+        &[
+            metrics::request::add_attributes("connector", req.connector_name.to_string()),
+            metrics::request::add_attributes("merchant", merchant_id.to_string()),
+        ],
+    );
+
     let mca_response = ForeignTryFrom::foreign_try_from(mca)?;
 
     Ok(service_api::ApplicationResponse::Json(mca_response))

crates/router/src/core/api_keys.rs

@@ -132,7 +132,7 @@ pub async fn create_api_key(
     let plaintext_api_key = PlaintextApiKey::new(consts::API_KEY_LENGTH);
     let api_key = storage::ApiKeyNew {
         key_id: PlaintextApiKey::new_key_id(),
-        merchant_id,
+        merchant_id: merchant_id.to_owned(),
         name: api_key.name,
         description: api_key.description,
         hashed_api_key: plaintext_api_key.keyed_hash(hash_key.peek()).into(),
@@ -148,7 +148,11 @@ pub async fn create_api_key(
         .change_context(errors::ApiErrorResponse::InternalServerError)
         .attach_printable("Failed to insert new API key")?;
 
-    metrics::API_KEY_CREATED.add(&metrics::CONTEXT, 1, &[]);
+    metrics::API_KEY_CREATED.add(
+        &metrics::CONTEXT,
+        1,
+        &[metrics::request::add_attributes("merchant", merchant_id)],
+    );
 
     Ok(ApplicationResponse::Json(
         (api_key, plaintext_api_key).foreign_into(),

crates/router/src/core/payments/transformers.rs

@@ -13,7 +13,7 @@ use crate::{
         errors::{self, RouterResponse, RouterResult},
         payments::{self, helpers},
     },
-    routes::AppState,
+    routes::{metrics, AppState},
     services::{self, RedirectForm},
     types::{
         self, api,
@@ -165,7 +165,7 @@ where
             payment_data.address,
             server,
             payment_data.connector_response.authentication_data,
-            operation,
+            &operation,
             payment_data.ephemeral_key,
         )
     }
@@ -256,7 +256,7 @@ pub fn payments_to_payments_response<R, Op>(
     address: PaymentAddress,
     server: &Server,
     redirection_data: Option<serde_json::Value>,
-    operation: Op,
+    operation: &Op,
     ephemeral_key_option: Option<ephemeral_key::EphemeralKey>,
 ) -> RouterResponse<api::PaymentsResponse>
 where
@@ -287,8 +287,19 @@ where
                 .collect(),
         )
     };
+    let merchant_id = payment_attempt.merchant_id.to_owned();
+    let payment_method_type = payment_attempt
+        .payment_method_type
+        .as_ref()
+        .map(ToString::to_string)
+        .unwrap_or("".to_owned());
+    let payment_method = payment_attempt
+        .payment_method
+        .as_ref()
+        .map(ToString::to_string)
+        .unwrap_or("".to_owned());
 
-    Ok(match payment_request {
+    let output = Ok(match payment_request {
         Some(_request) => {
             if payments::is_start_pay(&operation) && redirection_data.is_some() {
                 let redirection_data = redirection_data.get_required_value("redirection_data")?;
@@ -479,7 +490,20 @@ where
             metadata: payment_intent.metadata,
             ..Default::default()
         }),
-    })
+    });
+
+    metrics::PAYMENT_OPS_COUNT.add(
+        &metrics::CONTEXT,
+        1,
+        &[
+            metrics::request::add_attributes("operation", format!("{:?}", operation)),
+            metrics::request::add_attributes("merchant", merchant_id),
+            metrics::request::add_attributes("payment_method_type", payment_method_type),
+            metrics::request::add_attributes("payment_method", payment_method),
+        ],
+    );
+
+    output
 }
 
 impl ForeignFrom<(storage::PaymentIntent, storage::PaymentAttempt)> for api::PaymentsResponse {

crates/router/src/routes/metrics.rs

@@ -10,10 +10,12 @@ counter_metric!(AWS_KMS_FAILURES, GLOBAL_METER); // No. of AWS KMS API failures
 
 // API Level Metrics
 counter_metric!(REQUESTS_RECEIVED, GLOBAL_METER);
-counter_metric!(FAILED_REQUEST, GLOBAL_METER);
+counter_metric!(REQUEST_STATUS, GLOBAL_METER);
 histogram_metric!(REQUEST_TIME, GLOBAL_METER);
 
 // Operation Level Metrics
+counter_metric!(PAYMENT_OPS_COUNT, GLOBAL_METER);
+
 counter_metric!(PAYMENT_COUNT, GLOBAL_METER);
 counter_metric!(SUCCESSFUL_PAYMENT, GLOBAL_METER);
 
@@ -42,6 +44,8 @@ counter_metric!(CUSTOMER_REDACTED, GLOBAL_METER);
 counter_metric!(API_KEY_CREATED, GLOBAL_METER);
 counter_metric!(API_KEY_REVOKED, GLOBAL_METER);
 
+counter_metric!(MCA_CREATE, GLOBAL_METER);
+
 // Flow Specific Metrics
 
 counter_metric!(ACCESS_TOKEN_CREATION, GLOBAL_METER);

crates/router/src/routes/metrics/request.rs

@@ -1,8 +1,9 @@
 use super::utils as metric_utils;
+use crate::services::ApplicationResponse;
 
 pub async fn record_request_time_metric<F, R>(
     future: F,
-    flow: impl router_env::types::FlowMetric,
+    flow: &impl router_env::types::FlowMetric,
 ) -> R
 where
     F: futures::Future<Output = R>,
@@ -37,3 +38,26 @@ pub fn add_attributes<T: Into<router_env::opentelemetry::Value>>(
 ) -> router_env::opentelemetry::KeyValue {
     router_env::opentelemetry::KeyValue::new(key, value)
 }
+
+pub fn status_code_metrics(status_code: i64, flow: String, merchant_id: String) {
+    super::REQUEST_STATUS.add(
+        &super::CONTEXT,
+        1,
+        &[
+            add_attributes("status_code", status_code),
+            add_attributes("flow", flow),
+            add_attributes("merchant_id", merchant_id),
+        ],
+    )
+}
+
+pub fn track_response_status_code<Q>(response: &ApplicationResponse<Q>) -> i64 {
+    match response {
+        ApplicationResponse::Json(_)
+        | ApplicationResponse::StatusOk
+        | ApplicationResponse::TextPlain(_)
+        | ApplicationResponse::Form(_)
+        | ApplicationResponse::FileData(_) => 200,
+        ApplicationResponse::JsonForRedirection(_) => 302,
+    }
+}

crates/router/src/services/api.rs

@@ -9,7 +9,7 @@ use std::{
     time::{Duration, Instant},
 };
 
-use actix_web::{body, HttpRequest, HttpResponse, Responder};
+use actix_web::{body, HttpRequest, HttpResponse, Responder, ResponseError};
 use common_utils::errors::ReportSwitchExt;
 use error_stack::{report, IntoReport, Report, ResultExt};
 use masking::{ExposeOptionInterface, PeekInterface};
@@ -528,6 +528,7 @@ pub enum AuthFlow {
 
 #[instrument(skip(request, payload, state, func, api_auth))]
 pub async fn server_wrap_util<'a, 'b, A, U, T, Q, F, Fut, E, OErr>(
+    flow: &'a impl router_env::types::FlowMetric,
     state: &'b A,
     request: &'a HttpRequest,
     payload: T,
@@ -536,18 +537,36 @@ pub async fn server_wrap_util<'a, 'b, A, U, T, Q, F, Fut, E, OErr>(
 ) -> CustomResult<ApplicationResponse<Q>, OErr>
 where
     F: Fn(&'b A, U, T) -> Fut,
+    'b: 'a,
     Fut: Future<Output = CustomResult<ApplicationResponse<Q>, E>>,
     Q: Serialize + Debug + 'a,
     T: Debug,
     A: AppStateInfo,
+    U: auth::AuthInfo,
     CustomResult<ApplicationResponse<Q>, E>: ReportSwitchExt<ApplicationResponse<Q>, OErr>,
     CustomResult<U, errors::ApiErrorResponse>: ReportSwitchExt<U, OErr>,
+    OErr: ResponseError + Sync + Send + 'static,
 {
     let auth_out = api_auth
         .authenticate_and_fetch(request.headers(), state)
         .await
         .switch()?;
-    func(state, auth_out, payload).await.switch()
+    let metric_merchant_id = auth_out.get_merchant_id().unwrap_or("").to_string();
+
+    let output = func(state, auth_out, payload).await.switch();
+
+    let status_code = match output.as_ref() {
+        Ok(res) => metrics::request::track_response_status_code(res),
+        Err(err) => err.current_context().status_code().as_u16().into(),
+    };
+
+    metrics::request::status_code_metrics(
+        status_code,
+        flow.to_string(),
+        metric_merchant_id.to_string(),
+    );
+
+    output
 }
 
 #[instrument(
@@ -567,6 +586,7 @@ where
     Fut: Future<Output = CustomResult<ApplicationResponse<Q>, E>>,
     Q: Serialize + Debug + 'a,
     T: Debug,
+    U: auth::AuthInfo,
     A: AppStateInfo,
     CustomResult<ApplicationResponse<Q>, E>:
         ReportSwitchExt<ApplicationResponse<Q>, api_models::errors::types::ApiErrorResponse>,
@@ -579,8 +599,8 @@ where
     let start_instant = Instant::now();
     logger::info!(tag = ?Tag::BeginRequest);
     let res = match metrics::request::record_request_time_metric(
-        server_wrap_util(state, request, payload, func, api_auth),
-        flow,
+        server_wrap_util(&flow, state, request, payload, func, api_auth),
+        &flow,
     )
     .await
     {
@@ -636,7 +656,7 @@ where
 
 pub fn log_and_return_error_response<T>(error: Report<T>) -> HttpResponse
 where
-    T: actix_web::ResponseError + error_stack::Context + Clone,
+    T: error_stack::Context + Clone + ResponseError,
     Report<T>: EmbedError,
 {
     logger::error!(?error);

crates/router/src/services/authentication.rs

@@ -20,10 +20,28 @@ use crate::{
     types::storage,
     utils::OptionExt,
 };
+
+pub trait AuthInfo {
+    fn get_merchant_id(&self) -> Option<&str>;
+}
+
+impl AuthInfo for () {
+    fn get_merchant_id(&self) -> Option<&str> {
+        None
+    }
+}
+
+impl AuthInfo for storage::MerchantAccount {
+    fn get_merchant_id(&self) -> Option<&str> {
+        Some(&self.merchant_id)
+    }
+}
+
 #[async_trait]
 pub trait AuthenticateAndFetch<T, A>
 where
     A: AppStateInfo,
+    T: AuthInfo,
 {
     async fn authenticate_and_fetch(
         &self,
@@ -303,7 +321,7 @@ impl ClientSecretFetch for api_models::cards_info::CardsInfoRequest {
     }
 }
 
-pub fn jwt_auth_or<'a, T, A: AppStateInfo>(
+pub fn jwt_auth_or<'a, T: AuthInfo, A: AppStateInfo>(
     default_auth: &'a dyn AuthenticateAndFetch<T, A>,
     headers: &HeaderMap,
 ) -> Box<&'a dyn AuthenticateAndFetch<T, A>>

crates/router_env/src/logger/types.rs

@@ -184,12 +184,14 @@ pub enum Flow {
     AttachDisputeEvidence,
     /// Retrieve Dispute Evidence flow
     RetrieveDisputeEvidence,
+    /// Request to compatibility layer
+    CompatibilityLayerRequest,
 }
 
 ///
 /// Trait for providing generic behaviour to flow metric
 ///
-pub trait FlowMetric: ToString + std::fmt::Debug {}
+pub trait FlowMetric: ToString + std::fmt::Debug + Clone {}
 impl FlowMetric for Flow {}
 
 /// Category of log event.