Changed product catalog to use json, so that it slows down and generates nice profiles

src/productcatalogservice/server.go

@@ -10,7 +10,9 @@ import (
 	"time"
 
 	pb "./genproto"
+
 	"cloud.google.com/go/profiler"
+	"github.com/golang/protobuf/jsonpb"
 	"go.opencensus.io/exporter/stackdriver"
 	"go.opencensus.io/plugin/ocgrpc"
 	"go.opencensus.io/trace"
@@ -21,71 +23,107 @@ import (
 
 var port = flag.Int("port", 3550, "port to listen at")
 
-var catalog = []*pb.Product{
+const catalogJSON = `{
+	"products": [
   	{
-		Id:          "OLJCESPC7Z",
+    	"id": "OLJCESPC7Z",
-		Name:        "Vintage Typewriter",
+    	"name": "Vintage Typewriter",
-		Description: "This typewriter looks good in your living room.",
+    	"description": "This typewriter looks good in your living room.",
-		Picture:     "/static/img/products/typewriter.jpg",
+    	"picture": "/static/img/products/typewriter.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 67, Nanos: 990000000},
+    	"priceUsd": {
-	},
+      	"currencyCode": "USD",
-	{
+      	"units": 67,
-		Id:          "66VCHSJNUP",
+      	"nanos": 990000000
-		Name:        "Vintage Camera Lens",
-		Description: "You won't have a camera to use it and it probably doesn't work anyway.",
-		Picture:     "/static/img/products/camera-lens.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 12, Nanos: 490000000},
-	},
-	{
-		Id:          "1YMWWN1N4O",
-		Name:        "Home Barista Kit",
-		Description: "Always wanted to brew coffee with Chemex and Aeropress at home?",
-		Picture:     "/static/img/products/barista-kit.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 124, Nanos: 0},
-	},
-	{
-		Id:          "L9ECAV7KIM",
-		Name:        "Terrarium",
-		Description: "This terrarium will looks great in your white painted living room.",
-		Picture:     "/static/img/products/terrarium.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 36, Nanos: 450000000},
-	},
-	{
-		Id:          "2ZYFJ3GM2N",
-		Name:        "Film Camera",
-		Description: "This camera looks like it's a film camera, but it's actually digital.",
-		Picture:     "/static/img/products/film-camera.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 2245, Nanos: 00000000},
-	},
-	{
-		Id:          "0PUK6V6EV0",
-		Name:        "Vintage Record Player",
-		Description: "It still works.",
-		Picture:     "/static/img/products/record-player.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 65, Nanos: 500000000},
-	},
-	{
-		Id:          "LS4PSXUNUM",
-		Name:        "Metal Camping Mug",
-		Description: "You probably don't go camping that often but this is better than plastic cups.",
-		Picture:     "/static/img/products/camp-mug.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 24, Nanos: 330000000},
-	},
-	{
-		Id:          "9SIQT8TOJO",
-		Name:        "City Bike",
-		Description: "This single gear bike probably cannot climb the hills of San Francisco.",
-		Picture:     "/static/img/products/city-bike.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 789, Nanos: 500000000},
-	},
-	{
-		Id:          "6E92ZMYYFZ",
-		Name:        "Air Plant",
-		Description: "Have you ever wondered whether air plants need water? Buy one and figure out.",
-		Picture:     "/static/img/products/air-plant.jpg",
-		PriceUsd:    &pb.Money{CurrencyCode: "USD", Units: 12, Nanos: 300000000},
-	},
     	}
+  	},
+  	{
+    	"id": "66VCHSJNUP",
+    	"name": "Vintage Camera Lens",
+    	"description": "You won't have a camera to use it and it probably doesn't work anyway.",
+    	"picture": "/static/img/products/camera-lens.jpg",
+    	"priceUsd": {
+      	"currencyCode": "USD",
+      	"units": 12,
+      	"nanos": 490000000
+    	}
+  	},
+  	{
+    	"id": "1YMWWN1N4O",
+    	"name": "Home Barista Kit",
+    	"description": "Always wanted to brew coffee with Chemex and Aeropress at home?",
+    	"picture": "/static/img/products/barista-kit.jpg",
+    	"priceUsd": {
+      	"currencyCode": "USD",
+      	"units": 124
+    	}
+  	},
+  	{
+    	"id": "L9ECAV7KIM",
+    	"name": "Terrarium",
+    	"description": "This terrarium will looks great in your white painted living room.",
+    	"picture": "/static/img/products/terrarium.jpg",
+    	"priceUsd": {
+      	"currencyCode": "USD",
+      	"units": 36,
+      	"nanos": 450000000
+    	}
+  	},
+  	{
+    	"id": "2ZYFJ3GM2N",
+    	"name": "Film Camera",
+    	"description": "This camera looks like it's a film camera, but it's actually digital.",
+    	"picture": "/static/img/products/film-camera.jpg",
+    	"priceUsd": {
+      	"currencyCode": "USD",
+      	"units": 2245
+    	}
+  	},
+  	{
+    	"id": "0PUK6V6EV0",
+    	"name": "Vintage Record Player",
+    	"description": "It still works.",
+    	"picture": "/static/img/products/record-player.jpg",
+    	"priceUsd": {
+      	"currencyCode": "USD",
+      	"units": 65,
+      	"nanos": 500000000
+    	}
+  	},
+  	{
+    	"id": "LS4PSXUNUM",
+    	"name": "Metal Camping Mug",
+    	"description": "You probably don't go camping that often but this is better than plastic cups.",
+    	"picture": "/static/img/products/camp-mug.jpg",
+    	"priceUsd": {
+      	"currencyCode": "USD",
+      	"units": 24,
+      	"nanos": 330000000
+    	}
+  	},
+  	{
+    	"id": "9SIQT8TOJO",
+    	"name": "City Bike",
+    	"description": "This single gear bike probably cannot climb the hills of San Francisco.",
+    	"picture": "/static/img/products/city-bike.jpg",
+    	"priceUsd": {
+      	"currencyCode": "USD",
+      	"units": 789,
+      	"nanos": 500000000
+    	}
+  	},
+  	{
+    	"id": "6E92ZMYYFZ",
+    	"name": "Air Plant",
+    	"description": "Have you ever wondered whether air plants need water? Buy one and figure out.",
+    	"picture": "/static/img/products/air-plant.jpg",
+    	"priceUsd": {
+      	"currencyCode": "USD",
+      	"units": 12,
+      	"nanos": 300000000
+    	}
+  	}
+	]
+}`
 
 func main() {
 	go initTracing()
@@ -136,36 +174,51 @@ func initProfiling(service, version string) {
 			Service:        service,
 			ServiceVersion: version,
 			// ProjectID must be set if not running on GCP.
-			// ProjectID: "my-project",
+			ProjectID: "oval-time-515",
 		}); err != nil {
 			log.Printf("warn: failed to start profiler: %+v", err)
-		}
 			d := time.Second * 10 * time.Duration(i)
 			log.Printf("sleeping %v to retry initializing stackdriver profiler", d)
 			time.Sleep(d)
+			continue
+		}
+		return
 	}
 	log.Printf("warning: could not initialize stackdriver profiler after retrying, giving up")
 }
 
 type productCatalog struct{}
 
+func (p *productCatalog) catalog() []*pb.Product {
+	var cat pb.ListProductsResponse
+	if err := jsonpb.UnmarshalString(catalogJSON, &cat); err != nil {
+		log.Printf("warning: failed to parse the product catalog: %v", err)
+		return nil
+	}
+	return cat.Products
+}
+
 func (p *productCatalog) ListProducts(context.Context, *pb.Empty) (*pb.ListProductsResponse, error) {
-	return &pb.ListProductsResponse{Products: catalog}, nil
+	return &pb.ListProductsResponse{Products: p.catalog()}, nil
 }
 
 func (p *productCatalog) GetProduct(ctx context.Context, req *pb.GetProductRequest) (*pb.Product, error) {
-	for _, p := range catalog {
+	var found *pb.Product
-		if req.Id == p.Id {
+	for i := 0; i < len(p.catalog()); i++ {
-			return p, nil
+		if req.Id == p.catalog()[i].Id {
+			found = p.catalog()[i]
 		}
 	}
+	if found == nil {
 		return nil, status.Errorf(codes.NotFound, "no product with ID %s", req.Id)
 	}
+	return found, nil
+}
 
 func (p *productCatalog) SearchProducts(ctx context.Context, req *pb.SearchProductsRequest) (*pb.SearchProductsResponse, error) {
 	// Intepret query as a substring match in name or description.
 	var ps []*pb.Product
-	for _, p := range catalog {
+	for _, p := range p.catalog() {
 		if strings.Contains(strings.ToLower(p.Name), strings.ToLower(req.Query)) ||
 			strings.Contains(strings.ToLower(p.Description), strings.ToLower(req.Query)) {
 			ps = append(ps, p)