refactor(dynamic_routing): make the dynamo configs optional (#8589)

crates/external_services/src/grpc_client.rs

@@ -35,7 +35,7 @@ pub type Client = hyper_util::client::legacy::Client<HttpConnector, Body>;
 pub struct GrpcClients {
     /// The routing client
     #[cfg(feature = "dynamic_routing")]
-    pub dynamic_routing: RoutingStrategy,
+    pub dynamic_routing: Option<RoutingStrategy>,
     /// Health Check client for all gRPC services
     #[cfg(feature = "dynamic_routing")]
     pub health_client: HealthCheckClient,
@@ -47,7 +47,7 @@ pub struct GrpcClients {
 pub struct GrpcClientSettings {
     #[cfg(feature = "dynamic_routing")]
     /// Configs for Dynamic Routing Client
-    pub dynamic_routing_client: DynamicRoutingClientConfig,
+    pub dynamic_routing_client: Option<DynamicRoutingClientConfig>,
     /// Configs for Unified Connector Service client
     pub unified_connector_service: Option<UnifiedConnectorServiceClientConfig>,
 }
@@ -69,9 +69,10 @@ impl GrpcClientSettings {
         let dynamic_routing_connection = self
             .dynamic_routing_client
             .clone()
-            .get_dynamic_routing_connection(client.clone())
+            .map(|config| config.get_dynamic_routing_connection(client.clone()))
-            .await
+            .transpose()
-            .expect("Failed to establish a connection with the Dynamic Routing Server");
+            .expect("Failed to establish a connection with the Dynamic Routing Server")
+            .flatten();
 
         #[cfg(feature = "dynamic_routing")]
         let health_client = HealthCheckClient::build_connections(self, client)

crates/external_services/src/grpc_client/dynamic_routing.rs

@@ -47,11 +47,11 @@ pub enum DynamicRoutingError {
 #[derive(Debug, Clone)]
 pub struct RoutingStrategy {
     /// success rate service for Dynamic Routing
-    pub success_rate_client: Option<SuccessRateCalculatorClient<Client>>,
+    pub success_rate_client: SuccessRateCalculatorClient<Client>,
     /// contract based routing service for Dynamic Routing
-    pub contract_based_client: Option<ContractScoreCalculatorClient<Client>>,
+    pub contract_based_client: ContractScoreCalculatorClient<Client>,
     /// elimination service for Dynamic Routing
-    pub elimination_based_client: Option<EliminationAnalyserClient<Client>>,
+    pub elimination_based_client: EliminationAnalyserClient<Client>,
 }
 
 /// Contains the Dynamic Routing Client Config
@@ -74,32 +74,28 @@ pub enum DynamicRoutingClientConfig {
 
 impl DynamicRoutingClientConfig {
     /// establish connection with the server
-    pub async fn get_dynamic_routing_connection(
+    pub fn get_dynamic_routing_connection(
         self,
         client: Client,
-    ) -> Result<RoutingStrategy, Box<dyn std::error::Error>> {
+    ) -> Result<Option<RoutingStrategy>, Box<dyn std::error::Error>> {
-        let (success_rate_client, contract_based_client, elimination_based_client) = match self {
+        match self {
             Self::Enabled { host, port, .. } => {
                 let uri = format!("http://{host}:{port}").parse::<tonic::transport::Uri>()?;
                 logger::info!("Connection established with dynamic routing gRPC Server");
-                (
+
-                    Some(SuccessRateCalculatorClient::with_origin(
+                let (success_rate_client, contract_based_client, elimination_based_client) = (
-                        client.clone(),
+                    SuccessRateCalculatorClient::with_origin(client.clone(), uri.clone()),
-                        uri.clone(),
+                    ContractScoreCalculatorClient::with_origin(client.clone(), uri.clone()),
-                    )),
+                    EliminationAnalyserClient::with_origin(client, uri),
-                    Some(ContractScoreCalculatorClient::with_origin(
+                );
-                        client.clone(),
+
-                        uri.clone(),
+                Ok(Some(RoutingStrategy {
-                    )),
-                    Some(EliminationAnalyserClient::with_origin(client, uri)),
-                )
-            }
-            Self::Disabled => (None, None, None),
-        };
-        Ok(RoutingStrategy {
                     success_rate_client,
                     contract_based_client,
                     elimination_based_client,
-        })
+                }))
+            }
+            Self::Disabled => Ok(None),
+        }
     }
 }

crates/external_services/src/grpc_client/health_check_client.rs

@@ -53,11 +53,11 @@ impl HealthCheckClient {
     ) -> Result<Self, Box<dyn std::error::Error>> {
         let dynamic_routing_config = &config.dynamic_routing_client;
         let connection = match dynamic_routing_config {
-            DynamicRoutingClientConfig::Enabled {
+            Some(DynamicRoutingClientConfig::Enabled {
                 host,
                 port,
                 service,
-            } => Some((host.clone(), *port, service.clone())),
+            }) => Some((host.clone(), *port, service.clone())),
             _ => None,
         };
 
@@ -81,11 +81,11 @@ impl HealthCheckClient {
     ) -> HealthCheckResult<HealthCheckMap> {
         let dynamic_routing_config = &config.dynamic_routing_client;
         let connection = match dynamic_routing_config {
-            DynamicRoutingClientConfig::Enabled {
+            Some(DynamicRoutingClientConfig::Enabled {
                 host,
                 port,
                 service,
-            } => Some((host.clone(), *port, service.clone())),
+            }) => Some((host.clone(), *port, service.clone())),
             _ => None,
         };
 

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

@@ -2100,13 +2100,13 @@ where
             "performing success_based_routing for profile {}",
             profile_id.get_string_repr()
         );
-        let client = state
+        let client = &state
             .grpc_client
             .dynamic_routing
-            .success_rate_client
             .as_ref()
             .ok_or(errors::RoutingError::SuccessRateClientInitializationError)
-            .attach_printable("success_rate gRPC client not found")?;
+            .attach_printable("dynamic routing gRPC client not found")?
+            .success_rate_client;
 
         let success_based_routing_configs = routing::helpers::fetch_dynamic_routing_configs::<
             api_routing::SuccessBasedRoutingConfig,
@@ -2284,13 +2284,13 @@ pub async fn perform_elimination_routing(
             "performing elimination_routing for profile {}",
             profile_id.get_string_repr()
         );
-        let client = state
+        let client = &state
             .grpc_client
             .dynamic_routing
-            .elimination_based_client
             .as_ref()
             .ok_or(errors::RoutingError::EliminationClientInitializationError)
-            .attach_printable("elimination routing's gRPC client not found")?;
+            .attach_printable("dynamic routing gRPC client not found")?
+            .elimination_based_client;
 
         let elimination_routing_config = routing::helpers::fetch_dynamic_routing_configs::<
             api_routing::EliminationRoutingConfig,
@@ -2484,13 +2484,13 @@ where
             "performing contract_based_routing for profile {}",
             profile_id.get_string_repr()
         );
-        let client = state
+        let client = &state
             .grpc_client
             .dynamic_routing
-            .contract_based_client
             .as_ref()
             .ok_or(errors::RoutingError::ContractRoutingClientInitializationError)
-            .attach_printable("contract routing gRPC client not found")?;
+            .attach_printable("dynamic routing gRPC client not found")?
+            .contract_based_client;
 
         let contract_based_routing_configs = routing::helpers::fetch_dynamic_routing_configs::<
             api_routing::ContractBasedRoutingConfig,

crates/router/src/core/routing.rs

@@ -1848,10 +1848,10 @@ pub async fn success_based_routing_update_configs(
         state
             .grpc_client
             .dynamic_routing
-            .success_rate_client
             .as_ref()
-            .async_map(|sr_client| async {
+            .async_map(|dr_client| async {
-                sr_client
+                dr_client
+                    .success_rate_client
                     .invalidate_success_rate_routing_keys(
                         profile_id.get_string_repr().into(),
                         state.get_grpc_headers(),
@@ -1952,10 +1952,10 @@ pub async fn elimination_routing_update_configs(
         state
             .grpc_client
             .dynamic_routing
-            .elimination_based_client
             .as_ref()
-            .async_map(|er_client| async {
+            .async_map(|dr_client| async {
-                er_client
+                dr_client
+                    .elimination_based_client
                     .invalidate_elimination_bucket(
                         profile_id.get_string_repr().into(),
                         state.get_grpc_headers(),
@@ -2287,12 +2287,11 @@ pub async fn contract_based_routing_update_configs(
 
     state
         .grpc_client
-        .clone()
         .dynamic_routing
+        .as_ref()
+        .async_map(|dr_client| async {
+            dr_client
                 .contract_based_client
-        .clone()
-        .async_map(|ct_client| async move {
-            ct_client
                 .invalidate_contracts(
                     profile_id.get_string_repr().into(),
                     state.get_grpc_headers(),

crates/router/src/core/routing/helpers.rs

@@ -845,14 +845,14 @@ pub async fn push_metrics_with_update_window_for_success_based_routing(
 ) -> RouterResult<()> {
     if let Some(success_based_algo_ref) = dynamic_routing_algo_ref.success_based_algorithm {
         if success_based_algo_ref.enabled_feature != routing_types::DynamicRoutingFeatures::None {
-            let client = state
+            let client = &state
                 .grpc_client
                 .dynamic_routing
-                .success_rate_client
                 .as_ref()
                 .ok_or(errors::ApiErrorResponse::GenericNotFoundError {
-                    message: "success_rate gRPC client not found".to_string(),
+                    message: "dynamic routing gRPC client not found".to_string(),
-                })?;
+                })?
+                .success_rate_client;
 
             let payment_connector = &payment_attempt.connector.clone().ok_or(
                 errors::ApiErrorResponse::GenericNotFoundError {
@@ -1214,14 +1214,14 @@ pub async fn update_window_for_elimination_routing(
 ) -> RouterResult<()> {
     if let Some(elimination_algo_ref) = dynamic_algo_ref.elimination_routing_algorithm {
         if elimination_algo_ref.enabled_feature != routing_types::DynamicRoutingFeatures::None {
-            let client = state
+            let client = &state
                 .grpc_client
                 .dynamic_routing
-                .elimination_based_client
                 .as_ref()
                 .ok_or(errors::ApiErrorResponse::GenericNotFoundError {
-                    message: "elimination_rate gRPC client not found".to_string(),
+                    message: "dynamic routing gRPC client not found".to_string(),
-                })?;
+                })?
+                .elimination_based_client;
 
             let elimination_routing_config = fetch_dynamic_routing_configs::<
                 routing_types::EliminationRoutingConfig,
@@ -1394,14 +1394,14 @@ pub async fn push_metrics_with_update_window_for_contract_based_routing(
     if let Some(contract_routing_algo_ref) = dynamic_routing_algo_ref.contract_based_routing {
         if contract_routing_algo_ref.enabled_feature != routing_types::DynamicRoutingFeatures::None
         {
-            let client = state
+            let client = &state
                 .grpc_client
                 .dynamic_routing
-                .contract_based_client
+                .as_ref()
-                .clone()
                 .ok_or(errors::ApiErrorResponse::GenericNotFoundError {
-                    message: "contract_routing gRPC client not found".to_string(),
+                    message: "dynamic routing gRPC client not found".to_string(),
-                })?;
+                })?
+                .contract_based_client;
 
             let payment_connector = &payment_attempt.connector.clone().ok_or(
                 errors::ApiErrorResponse::GenericNotFoundError {