added watcher worker

.gitignore

@@ -7,3 +7,7 @@ main
 
 /versionrecover.bolt
 /recover.bolt
+/tests/benchmarks/cpu.prof
+/tests/benchmarks/mem.prof
+/tests/benchmarks/block.prof
+/tests/benchmarks/benchmarks.test.exe

internal/app/app.go

@@ -11,6 +11,7 @@ import (
 	"penahub.gitlab.yandexcloud.net/external/trashlog.git/app"
 	"penahub.gitlab.yandexcloud.net/external/trashlog.git/wrappers/zaptrashlog"
 	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/interface/controller/http"
+	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/workers"
 	"syscall"
 	"time"
 
@@ -106,6 +107,8 @@ func Run(config *models.Config, logger *zap.Logger, build Build) (appErr error)
 		return err
 	}
 
+	watchWorker := workers.NewWatchWorker(mongoDB.Collection("accounts"), logger)
+
 	clients := initialize.NewClients(initialize.ClientsDeps{
 		Logger:                       logger,
 		AuthURL:                      &config.Service.AuthMicroservice.URL,
@@ -150,6 +153,7 @@ func Run(config *models.Config, logger *zap.Logger, build Build) (appErr error)
 		Repositories: repositories,
 		Clients:      clients,
 		MiddleWare:   middleWare,
+		WatchWorker:  watchWorker,
 	})
 
 	serverHTTP := server.NewServer(server.ServerConfig{
@@ -168,6 +172,8 @@ func Run(config *models.Config, logger *zap.Logger, build Build) (appErr error)
 
 	serverGRPC.Register(rpcControllers)
 
+	go watchWorker.Run(ctx)
+
 	go func() {
 		if err := serverHTTP.Start(config.HTTP.Host + ":" + config.HTTP.Port); err != nil {
 			logger.Error("Server startup error", zap.Error(err))

internal/initialize/controllers.go

@@ -14,13 +14,14 @@ import (
 	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/interface/controller/http/history"
 	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/interface/controller/http/wallet"
 	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/models"
+	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/workers"
 )
 
 type RpcControllersDeps struct {
 	Logger       *zap.Logger
 	Services     *Services
 	Repositories *Repositories
-	HLogger  hlog.Logger
+	HLogger      hlog.Logger
 }
 
 type RpcControllers struct {
@@ -51,6 +52,7 @@ type HttpControllersDeps struct {
 	Logger       *zap.Logger
 	Repositories *Repositories
 	Clients      *Clients
+	WatchWorker  *workers.WatchWorker
 }
 
 type HttpController struct {
@@ -69,6 +71,7 @@ func NewHttpControllers(deps HttpControllersDeps) *HttpController {
 			Logger:      deps.Logger,
 			Encrypt:     deps.Encrypt,
 			AuthClient:  deps.Clients.AuthClient,
+			WatchWorker: deps.WatchWorker,
 		}),
 		CartController: cart.NewCartController(cart.Deps{
 			MiddleWare:     deps.MiddleWare,

internal/interface/controller/http/account/controllers.go

@@ -2,7 +2,6 @@ package account
 
 import (
 	"bufio"
-	"context"
 	"encoding/json"
 	"fmt"
 	"github.com/gofiber/fiber/v2"
@@ -15,6 +14,7 @@ import (
 	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/interface/controller/http"
 	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/interface/repository"
 	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/models"
+	"penahub.gitlab.yandexcloud.net/pena-services/customer/internal/workers"
 	"strconv"
 	"time"
 )
@@ -25,6 +25,7 @@ type Deps struct {
 	Logger      *zap.Logger
 	Encrypt     *qutils.Encrypt
 	AuthClient  *client.AuthClient
+	WatchWorker *workers.WatchWorker
 }
 
 type AccountController struct {
@@ -33,6 +34,7 @@ type AccountController struct {
 	logger      *zap.Logger
 	encrypt     *qutils.Encrypt
 	authClient  *client.AuthClient
+	watchWorker *workers.WatchWorker
 }
 
 func NewAccountController(deps Deps) *AccountController {
@@ -42,6 +44,7 @@ func NewAccountController(deps Deps) *AccountController {
 		logger:      deps.Logger,
 		encrypt:     deps.Encrypt,
 		authClient:  deps.AuthClient,
+		watchWorker: deps.WatchWorker,
 	}
 }
 
@@ -261,14 +264,9 @@ func (receiver *AccountController) AccountPipe(ctx *fiber.Ctx) error {
 	ctx.Set("Transfer-Encoding", "chunked")
 
 	accountCh := make(chan map[string]interface{})
-	cancelCtx, cancel := context.WithCancel(ctx.Context())
+	//cancelCtx, cancel := context.WithCancel(ctx.Context())
 
-	go func(ctx context.Context) {
-		defer close(accountCh)
-		if err := receiver.accountRepo.AccountPipe(ctx, userID, accountCh); err != nil {
-			receiver.logger.Error("error in account pipe repo method", zap.Error(err))
-		}
-	}(cancelCtx)
+	receiver.watchWorker.AddChannel(userID, accountCh)
 
 	ctx.Status(fiber.StatusOK).Context().SetBodyStreamWriter(func(w *bufio.Writer) {
 		pingTicker := time.NewTicker(5 * time.Second)
@@ -287,15 +285,17 @@ func (receiver *AccountController) AccountPipe(ctx *fiber.Ctx) error {
 				fmt.Fprintf(w, "data: %s\n\n", accountJSON)
 				if err := w.Flush(); err != nil {
 					receiver.logger.Error("error flushing", zap.Error(err))
-					cancel()
-					receiver.logger.Info("Close connection Account Pipe sse")
+					//cancel()
+					//receiver.logger.Info("Close connection Account Pipe sse")
+					receiver.watchWorker.DropChannel(userID)
 					return
 				}
 			case <-pingTicker.C:
 				fmt.Fprintf(w, "data: %s\n\n", `{"event": "ping"}`)
 				if err := w.Flush(); err != nil {
 					receiver.logger.Error("error sending ping Account Pipe sse, close connection", zap.Error(err))
-					cancel()
+					receiver.watchWorker.DropChannel(userID)
+					//cancel()
 					return
 				}
 			}

internal/workers/mongo_watcher.go

@@ -1 +1,92 @@
 package workers
+
+import (
+	"context"
+	"fmt"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+	"go.uber.org/zap"
+	"sync"
+)
+
+type WatchWorker struct {
+	accountChannels map[string]chan map[string]interface{}
+	mu              sync.Mutex
+	mongoDB         *mongo.Collection
+	logger          *zap.Logger
+}
+
+func NewWatchWorker(mongoDB *mongo.Collection, logger *zap.Logger) *WatchWorker {
+	return &WatchWorker{
+		accountChannels: make(map[string]chan map[string]interface{}),
+		mongoDB:         mongoDB,
+		logger:          logger,
+	}
+}
+
+func (w *WatchWorker) Run(ctx context.Context) {
+	pipeline := mongo.Pipeline{
+		{{"$match", bson.M{"operationType": "update"}}},
+	}
+	opts := options.ChangeStream()
+	opts.SetFullDocument(options.UpdateLookup)
+	changeStream, err := w.mongoDB.Watch(ctx, pipeline, opts)
+	if err != nil {
+		w.logger.Error("error start change stream", zap.Error(err))
+		return
+	}
+	defer changeStream.Close(ctx)
+
+	for {
+		if changeStream.Next(ctx) {
+			var changeEvent struct {
+				FullDocument struct {
+					UserID string `bson:"userId"`
+				} `bson:"fullDocument"`
+				UpdateDescription struct {
+					UpdatedFields map[string]interface{} `bson:"updatedFields"`
+				} `bson:"updateDescription"`
+			}
+			if err := changeStream.Decode(&changeEvent); err != nil {
+				w.logger.Error("error decode change event", zap.Error(err))
+				continue
+			}
+
+			w.mu.Lock()
+			ch, ok := w.accountChannels[changeEvent.FullDocument.UserID]
+			w.mu.Unlock()
+			if !ok {
+				fmt.Println("userID", changeEvent.FullDocument.UserID)
+				fmt.Println("fields", changeEvent.UpdateDescription.UpdatedFields)
+			}
+			if ok {
+				select {
+				case ch <- changeEvent.UpdateDescription.UpdatedFields:
+				case <-ctx.Done():
+					return
+				}
+			}
+		}
+
+		select {
+		case <-ctx.Done():
+			return
+		default:
+			fmt.Println("default select case")
+		}
+	}
+}
+
+func (w *WatchWorker) AddChannel(userID string, ch chan map[string]interface{}) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	w.accountChannels[userID] = ch
+}
+
+func (w *WatchWorker) DropChannel(userID string) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	fmt.Println("drop chan, userID:", userID)
+	delete(w.accountChannels, userID)
+}

tests/e2e/accountPipe_test.go

@@ -13,7 +13,7 @@ import (
 func TestAccountPipe(t *testing.T) {
 	jwtUtil := helpers.InitializeJWT()
 
-	token, tokenErr := jwtUtil.Create("807f1f77bcf81cd799439077")
+	token, tokenErr := jwtUtil.Create("64e53ed187392e122e5d3d50")
 	if !assert.NoError(t, tokenErr) {
 		return
 	}