317 Add Observability to PDP and OE

.gitignore

@@ -54,3 +54,7 @@ audit-service/data/
 # Allow .choreo directories for WSO2 Choreo deployment
 !**/.choreo/
 !**/.choreo/**
+
+# Database data directories (local development)
+exchange/pdp-data/
+exchange/ce-data/

exchange/consent-engine/main.go

@@ -32,6 +32,17 @@ func main() {
 	// Setup logging
 	utils.SetupLogging(cfg.Logging.Format, cfg.Logging.Level)
 
+	// Initialize monitoring/observability (optional - can be disabled via ENABLE_OBSERVABILITY=false)
+	// Services will continue to function normally even if observability is disabled
+	if monitoring.IsObservabilityEnabled() {
+		monitoringConfig := monitoring.DefaultConfig("consent-engine")
+		if err := monitoring.Initialize(monitoringConfig); err != nil {
+			slog.Warn("Failed to initialize monitoring (service will continue)", "error", err)
+		}
+	} else {
+		slog.Info("Observability disabled via environment variable")
+	}
+
 	slog.Info("Starting consent engine",
 		"environment", cfg.Environment,
 		"port", cfg.Service.Port,

exchange/docker-compose.yml

@@ -98,4 +98,4 @@ services:
 networks:
   opendif-network:
     name: opendif-network
-    external: true
+    external: true

exchange/minimal-config.json

@@ -0,0 +1,6 @@
+{
+  "ceUrl": "http://consent-engine:8081",
+  "pdpUrl": "http://policy-decision-point:8082",
+  "providers": [],
+  "argMappings": []
+}

exchange/orchestration-engine/provider/provider.go

@@ -6,9 +6,11 @@ import (
 	"fmt"
 	"net/http"
 	"sync"
+	"time"
 
 	"github.com/ginaxu1/gov-dx-sandbox/exchange/orchestration-engine/logger"
 	"github.com/ginaxu1/gov-dx-sandbox/exchange/orchestration-engine/pkg/auth"
+	"github.com/gov-dx-sandbox/exchange/shared/monitoring"
 	"golang.org/x/oauth2/clientcredentials"
 )
 
@@ -47,7 +49,7 @@ func NewProvider(serviceKey, serviceUrl, schemaID string, authConfig *auth.AuthC
 }
 
 // PerformRequest performs the HTTP request to the provider with necessary authentication.
-func (p *Provider) PerformRequest(ctx context.Context, reqBody []byte) (*http.Response, error) {
+func (p *Provider) PerformRequest(ctx context.Context, reqBody []byte) (resp *http.Response, err error) {
 	// 1. Create Request
 	req, err := http.NewRequestWithContext(ctx, "POST", p.ServiceUrl, bytes.NewBuffer(reqBody))
 	if err != nil {
@@ -56,21 +58,29 @@ func (p *Provider) PerformRequest(ctx context.Context, reqBody []byte) (*http.Re
 
 	req.Header.Set("Content-Type", "application/json")
 
+	start := time.Now()
+	defer func() {
+		monitoring.RecordExternalCall(p.ServiceKey, "provider_request", time.Since(start), err)
+	}()
+
 	if p.Auth != nil {
 		switch p.Auth.Type {
 		case auth.AuthTypeOAuth2:
 			if p.OAuth2Config == nil {
-				logger.Log.Error("OAuth2Config is nil", "providerKey", p.ServiceKey)
-				return nil, fmt.Errorf("OAuth2Config is nil")
+				err = fmt.Errorf("OAuth2Config is nil")
+				logger.Log.Error(err.Error(), "providerKey", p.ServiceKey)
+				return
 			}
 
 			client := p.OAuth2Config.Client(ctx)
-			return client.Do(req) // Use context with request
+			resp, err = client.Do(req)
+			return
 		case auth.AuthTypeAPIKey:
 			req.Header.Set(p.Auth.APIKeyName, p.Auth.APIKeyValue)
 		}
 	}
 
 	// Default client execution (for API Key or no auth)
-	return p.Client.Do(req)
+	resp, err = p.Client.Do(req)
+	return
 }

exchange/orchestration-engine/server/server.go

@@ -17,6 +17,7 @@ import (
 	"github.com/ginaxu1/gov-dx-sandbox/exchange/orchestration-engine/pkg/graphql"
 	"github.com/ginaxu1/gov-dx-sandbox/exchange/orchestration-engine/services"
 	"github.com/go-chi/chi/v5"
+	"github.com/gov-dx-sandbox/exchange/shared/monitoring"
 )
 
 type Response struct {
@@ -85,6 +86,7 @@ func RunServer(ctx context.Context, f *federator.Federator) {
 // SetupRouter initializes the router and registers all endpoints
 func SetupRouter(f *federator.Federator) *chi.Mux {
 	mux := chi.NewRouter()
+	mux.Use(monitoring.HTTPMetricsMiddleware)
 
 	// Initialize database connection
 	dbConnectionString := getDatabaseConnectionString()
@@ -123,6 +125,9 @@ func SetupRouter(f *federator.Federator) *chi.Mux {
 		}
 	})
 
+	// Metrics endpoint
+	mux.Method("GET", "/metrics", monitoring.Handler())
+
 	// Schema management routes
 	mux.Get("/sdl", schemaHandler.GetActiveSchema)
 	mux.Post("/sdl", schemaHandler.CreateSchema)
@@ -135,6 +140,7 @@ func SetupRouter(f *federator.Federator) *chi.Mux {
 
 	// Publicly accessible Endpoints
 	mux.Post("/public/graphql", func(w http.ResponseWriter, r *http.Request) {
+
 		// Parse request body
 		var req graphql.Request
 		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
@@ -181,6 +187,12 @@ func SetupRouter(f *federator.Federator) *chi.Mux {
 			logger.Log.Error("Failed to write response", "error", err)
 			return
 		}
+
+		outcome := "success"
+		if len(response.Errors) > 0 {
+			outcome = "failure"
+		}
+		monitoring.RecordBusinessEvent("graphql_request", outcome)
 	})
 
 	return mux

exchange/policy-decision-point/go.mod

@@ -4,29 +4,60 @@ go 1.24.6
 
 require (
 	github.com/google/uuid v1.6.0
+	github.com/gov-dx-sandbox/exchange/shared/monitoring v0.0.0
 	github.com/gov-dx-sandbox/exchange/shared/utils v0.0.0
 	github.com/stretchr/testify v1.10.0
 	gorm.io/driver/postgres v1.6.0
 	gorm.io/driver/sqlite v1.6.0
 	gorm.io/gorm v1.31.0
 )
 
-replace github.com/gov-dx-sandbox/exchange/shared/utils => ../shared/utils
-
 require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.23.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/pgx/v5 v5.6.0 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
-	github.com/kr/pretty v0.3.1 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
 	github.com/mattn/go-sqlite3 v1.14.22 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/rogpeppe/go-internal v1.13.1 // indirect
+	github.com/prometheus/client_golang v1.20.5 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
+	github.com/prometheus/common v0.60.1 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
+	go.opentelemetry.io/otel v1.32.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.32.0 // indirect
+	go.opentelemetry.io/otel/exporters/prometheus v0.54.0 // indirect
+	go.opentelemetry.io/otel/metric v1.32.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.32.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.32.0 // indirect
+	go.opentelemetry.io/otel/trace v1.32.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
 	golang.org/x/crypto v0.40.0 // indirect
+	golang.org/x/net v0.41.0 // indirect
 	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/sys v0.34.0 // indirect
 	golang.org/x/text v0.27.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20241104194629-dd2ea8efbc28 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241104194629-dd2ea8efbc28 // indirect
+	google.golang.org/grpc v1.67.1 // indirect
+	google.golang.org/protobuf v1.35.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
+
+replace github.com/gov-dx-sandbox/exchange/shared/config => ../shared/config
+
+replace github.com/gov-dx-sandbox/exchange/shared/constants => ../shared/constants
+
+replace github.com/gov-dx-sandbox/exchange/shared/utils => ../shared/utils
+
+replace github.com/gov-dx-sandbox/exchange/shared/monitoring => ../shared/monitoring

exchange/policy-decision-point/go.sum

@@ -1,9 +1,23 @@
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
+github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.23.0 h1:ad0vkEBuk23VJzZR9nkLVG0YAoN9coASF1GusYX6AlU=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.23.0/go.mod h1:igFoXX2ELCW06bol23DWPB5BEWfZISOzSP5K2sbLea0=
 github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
@@ -16,29 +30,69 @@ github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD
 github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
 github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
 github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
 github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
-github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
+github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
+github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
+github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y=
+github.com/prometheus/client_golang v1.20.5/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
+github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
+github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
+github.com/prometheus/common v0.60.1 h1:FUas6GcOw66yB/73KC+BOZoFJmbo/1pojoILArPAaSc=
+github.com/prometheus/common v0.60.1/go.mod h1:h0LYf1R1deLSKtD4Vdg8gy4RuOvENW2J/h19V5NADQw=
+github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
+github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
 github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
 github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+go.opentelemetry.io/otel v1.32.0 h1:WnBN+Xjcteh0zdk01SVqV55d/m62NJLJdIyb4y/WO5U=
+go.opentelemetry.io/otel v1.32.0/go.mod h1:00DCVSB0RQcnzlwyTfqtxSm+DRr9hpYrHjNGiBHVQIg=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.32.0 h1:t/Qur3vKSkUCcDVaSumWF2PKHt85pc7fRvFuoVT8qFU=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.32.0/go.mod h1:Rl61tySSdcOJWoEgYZVtmnKdA0GeKrSqkHC1t+91CH8=
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+go.opentelemetry.io/otel/metric v1.32.0 h1:xV2umtmNcThh2/a/aCP+h64Xx5wsj8qqnkYZktzNa0M=
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+go.opentelemetry.io/otel/sdk/metric v1.32.0 h1:rZvFnvmvawYb0alrYkjraqJq0Z4ZUJAiyYCU9snn1CU=
+go.opentelemetry.io/otel/sdk/metric v1.32.0/go.mod h1:PWeZlq0zt9YkYAp3gjKZ0eicRYvOh1Gd+X99x6GHpCQ=
+go.opentelemetry.io/otel/trace v1.32.0 h1:WIC9mYrXf8TmY/EXuULKc8hR17vE+Hjv2cssQDe03fM=
+go.opentelemetry.io/otel/trace v1.32.0/go.mod h1:+i4rkvCraA+tG6AzwloGaCtkx53Fa+L+V8e9a7YvhT8=
+go.opentelemetry.io/proto/otlp v1.3.1 h1:TrMUixzpM0yuc/znrFTP9MMRh8trP93mkCiDVeXrui0=
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 golang.org/x/crypto v0.40.0/go.mod h1:Qr1vMER5WyS2dfPHAlsOj01wgLbsyWtFn/aY+5+ZdxY=
+golang.org/x/net v0.41.0 h1:vBTly1HeNPEn3wtREYfy4GZ/NECgw2Cnl+nK6Nz3uvw=
+golang.org/x/net v0.41.0/go.mod h1:B/K4NNqkfmg07DQYrbwvSluqCJOOXwUjeb/5lOisjbA=
 golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
 golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
+golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.27.0 h1:4fGWRpyh641NLlecmyl4LOe6yDdfaYNrGb2zdfo4JV4=
 golang.org/x/text v0.27.0/go.mod h1:1D28KMCvyooCX9hBiosv5Tz/+YLxj0j7XhWjpSUF7CU=
+google.golang.org/genproto/googleapis/api v0.0.0-20241104194629-dd2ea8efbc28 h1:M0KvPgPmDZHPlbRbaNU1APr28TvwvvdUPlSv7PUvy8g=
+google.golang.org/genproto/googleapis/api v0.0.0-20241104194629-dd2ea8efbc28/go.mod h1:dguCy7UOdZhTvLzDyt15+rOrawrpM4q7DD9dQ1P11P4=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241104194629-dd2ea8efbc28 h1:XVhgTWWV3kGQlwJHR3upFWZeTsei6Oks1apkZSeonIE=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241104194629-dd2ea8efbc28/go.mod h1:GX3210XPVPUjJbTUbvwI8f2IpZDMZuPJWDzDuebbviI=
+google.golang.org/grpc v1.67.1 h1:zWnc1Vrcno+lHZCOofnIMvycFcc0QRGIzm9dhnDX68E=
+google.golang.org/grpc v1.67.1/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
+google.golang.org/protobuf v1.35.1 h1:m3LfL6/Ca+fqnjnlqQXNpFPABW1UD7mjh8KO2mKFytA=
+google.golang.org/protobuf v1.35.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

exchange/policy-decision-point/main.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/gov-dx-sandbox/exchange/policy-decision-point/internal/config"
 	v1 "github.com/gov-dx-sandbox/exchange/policy-decision-point/v1"
+	"github.com/gov-dx-sandbox/exchange/shared/monitoring"
 	"github.com/gov-dx-sandbox/exchange/shared/utils"
 )
 
@@ -26,6 +27,17 @@ func main() {
 	// Setup logging
 	utils.SetupLogging(cfg.Logging.Format, cfg.Logging.Level)
 
+	// Initialize monitoring/observability (optional - can be disabled via ENABLE_OBSERVABILITY=false)
+	// Services will continue to function normally even if observability is disabled
+	if monitoring.IsObservabilityEnabled() {
+		monitoringConfig := monitoring.DefaultConfig("policy-decision-point")
+		if err := monitoring.Initialize(monitoringConfig); err != nil {
+			slog.Warn("Failed to initialize monitoring (service will continue)", "error", err)
+		}
+	} else {
+		slog.Info("Observability disabled via environment variable")
+	}
+
 	slog.Info("Starting policy decision point",
 		"environment", cfg.Environment,
 		"port", cfg.Service.Port,
@@ -78,6 +90,9 @@ func main() {
 	mux := http.NewServeMux()
 	v1Handler.SetupRoutes(mux) // V1 routes with /api/v1/policy/ prefix
 
+	// Metrics endpoint
+	mux.Handle("/metrics", monitoring.Handler())
+
 	// Health check endpoint
 	mux.Handle("/health", utils.PanicRecoveryMiddleware(utils.HealthHandler("policy-decision-point")))
 
@@ -151,14 +166,17 @@ func main() {
 		utils.RespondWithJSON(w, http.StatusOK, debugInfo)
 	})))
 
+	// Wrap with metrics middleware
+	handler := monitoring.HTTPMetricsMiddleware(mux)
+
 	// Create server configuration
 	serverConfig := &utils.ServerConfig{
 		Port:         cfg.Service.Port,
 		ReadTimeout:  cfg.Service.Timeout,
 		WriteTimeout: cfg.Service.Timeout,
 		IdleTimeout:  60 * time.Second,
 	}
-	server := utils.CreateServer(serverConfig, mux)
+	server := utils.CreateServer(serverConfig, handler)
 
 	// Start server with graceful shutdown
 	if err := utils.StartServerWithGracefulShutdown(server, "policy-decision-point"); err != nil {