feat: implement end-to-end distributed tracing for HTTP and async tasks

- introduce typed traceCtxKey to prevent context key collisions (staticcheck fix)
  - inject B3 trace values into c.Request.Context() in StartTrace middleware
    so handlers using c.Request.Context() carry trace info
  - create startup trace context in main.go, replacing context.TODO()
  - propagate HTTP traceID/spanID through TaskQueueMessage into RabbitMQ
    worker, linking HTTP request → publish → execution on the same traceID
  - fix GORM logger null traceID by binding ctx to AutoMigrate and queries
    via db.WithContext(ctx)
  - thread ctx through handler factory to fix null traceID in startup logs
  - replace per-request RabbitMQ producer with channel-based
    PushTaskToRabbitMQ goroutine; restrict Swagger to non-production

constants/trace.go

@@ -7,3 +7,13 @@ const (
 	HeaderSpanID       = "X-B3-SpanId"
 	HeaderParentSpanID = "X-B3-ParentSpanId"
 )
+
+// traceCtxKey is an unexported type for context keys to avoid collisions with other packages.
+type traceCtxKey string
+
+// Typed context keys for trace values — use these with context.WithValue / ctx.Value.
+var (
+	CtxKeyTraceID      = traceCtxKey(HeaderTraceID)
+	CtxKeySpanID       = traceCtxKey(HeaderSpanID)
+	CtxKeyParentSpanID = traceCtxKey(HeaderParentSpanID)
+)

database/postgres_init.go

@@ -2,6 +2,7 @@
 package database
 
 import (
+	"context"
 	"sync"
 
 	"modelRT/logger"
@@ -22,22 +23,22 @@ func GetPostgresDBClient() *gorm.DB {
 }
 
 // InitPostgresDBInstance return instance of PostgresDB client
-func InitPostgresDBInstance(PostgresDBURI string) *gorm.DB {
+func InitPostgresDBInstance(ctx context.Context, PostgresDBURI string) *gorm.DB {
 	postgresOnce.Do(func() {
-		_globalPostgresClient = initPostgresDBClient(PostgresDBURI)
+		_globalPostgresClient = initPostgresDBClient(ctx, PostgresDBURI)
 	})
 	return _globalPostgresClient
 }
 
 // initPostgresDBClient return successfully initialized PostgresDB client
-func initPostgresDBClient(PostgresDBURI string) *gorm.DB {
+func initPostgresDBClient(ctx context.Context, PostgresDBURI string) *gorm.DB {
 	db, err := gorm.Open(postgres.Open(PostgresDBURI), &gorm.Config{Logger: logger.NewGormLogger()})
 	if err != nil {
 		panic(err)
 	}
 
 	// Auto migrate async task tables
-	err = db.AutoMigrate(
+	err = db.WithContext(ctx).AutoMigrate(
 		&orm.AsyncTask{},
 		&orm.AsyncTaskResult{},
 	)

handler/async_task_create_handler.go

@@ -2,7 +2,6 @@
 package handler
 
 import (
-	"modelRT/config"
 	"modelRT/constants"
 	"modelRT/database"
 	"modelRT/logger"
@@ -66,38 +65,17 @@ func AsyncTaskCreateHandler(c *gin.Context) {
 		return
 	}
 
-	// send task to message queue
+	// enqueue task to channel for async publishing to RabbitMQ
-	cfg, exists := c.Get("config")
+	msg := task.NewTaskQueueMessageWithPriority(asyncTask.TaskID, task.TaskType(request.TaskType), 5)
-	if !exists {
+	// propagate HTTP request trace so the async chain stays on the same traceID
-		logger.Warn(ctx, "Configuration not found in context, skipping queue publishing")
+	if v, _ := ctx.Value(constants.CtxKeyTraceID).(string); v != "" {
-	} else {
+		msg.TraceID = v
-		modelRTConfig := cfg.(config.ModelRTConfig)
-		ctx := c.Request.Context()
-
-		// create queue producer
-		// TODO 像实时计算一样使用 channel 代替
-		producer, err := task.NewQueueProducer(ctx, modelRTConfig.RabbitMQConfig)
-		if err != nil {
-			logger.Error(ctx, "create rabbitMQ queue producer failed", "error", err)
-			renderRespFailure(c, constants.RespCodeServerError, "create rabbitMQ queue producer failed", nil)
-			return
-		}
-		defer producer.Close()
-
-		// publish task to queue
-		taskType := task.TaskType(request.TaskType)
-		priority := 5 // Default priority
-
-		if err := producer.PublishTaskWithRetry(ctx, asyncTask.TaskID, taskType, priority, 3); err != nil {
-			logger.Error(ctx, "publish task to rabbitMQ queue failed",
-				"task_id", asyncTask.TaskID, "error", err)
-			renderRespFailure(c, constants.RespCodeServerError, "publish task to rabbitMQ queue failed", nil)
-			return
-		}
-		logger.Info(ctx, "published task to rabbitMQ queue successfully",
-			"task_id", asyncTask.TaskID, "queue", constants.TaskQueueName)
-
 	}
+	if v, _ := ctx.Value(constants.CtxKeySpanID).(string); v != "" {
+		msg.SpanID = v
+	}
+	task.TaskMsgChan <- msg
+	logger.Info(ctx, "task enqueued to channel", "task_id", asyncTask.TaskID, "queue", constants.TaskQueueName)
 
 	logger.Info(ctx, "async task created success", "task_id", asyncTask.TaskID, "task_type", request.TaskType)
 

logger/logger.go

@@ -12,6 +12,14 @@ import (
 	"go.uber.org/zap/zapcore"
 )
 
+// Logger is the interface returned by New for structured, trace-aware logging.
+type Logger interface {
+	Debug(msg string, kv ...any)
+	Info(msg string, kv ...any)
+	Warn(msg string, kv ...any)
+	Error(msg string, kv ...any)
+}
+
 type logger struct {
 	ctx     context.Context
 	traceID string
@@ -48,7 +56,10 @@ func makeLogFields(ctx context.Context, kv ...any) []zap.Field {
 		kv = append(kv, "unknown")
 	}
 
-	kv = append(kv, "traceID", ctx.Value(constants.HeaderTraceID), "spanID", ctx.Value(constants.HeaderSpanID), "parentSpanID", ctx.Value(constants.HeaderParentSpanID))
+	traceID, _ := ctx.Value(constants.CtxKeyTraceID).(string)
+	spanID, _ := ctx.Value(constants.CtxKeySpanID).(string)
+	parentSpanID, _ := ctx.Value(constants.CtxKeyParentSpanID).(string)
+	kv = append(kv, "traceID", traceID, "spanID", spanID, "parentSpanID", parentSpanID)
 
 	funcName, file, line := getLoggerCallerInfo()
 	kv = append(kv, "func", funcName, "file", file, "line", line)
@@ -89,16 +100,18 @@ func getLoggerCallerInfo() (funcName, file string, line int) {
 	return
 }
 
-func New(ctx context.Context) *logger {
+// New returns a logger bound to ctx. Trace fields (traceID, spanID, parentSpanID)
+// are extracted from ctx using typed keys, and are included in every log entry.
+func New(ctx context.Context) Logger {
 	var traceID, spanID, pSpanID string
-	if ctx.Value("traceID") != nil {
+	if v, _ := ctx.Value(constants.CtxKeyTraceID).(string); v != "" {
-		traceID = ctx.Value("traceID").(string)
+		traceID = v
 	}
-	if ctx.Value("spanID") != nil {
+	if v, _ := ctx.Value(constants.CtxKeySpanID).(string); v != "" {
-		spanID = ctx.Value("spanID").(string)
+		spanID = v
 	}
-	if ctx.Value("psapnID") != nil {
+	if v, _ := ctx.Value(constants.CtxKeyParentSpanID).(string); v != "" {
-		pSpanID = ctx.Value("pspanID").(string)
+		pSpanID = v
 	}
 
 	return &logger{

main.go

@@ -19,7 +19,6 @@ import (
 	"modelRT/database"
 	"modelRT/diagram"
 	"modelRT/logger"
-	"modelRT/middleware"
 	"modelRT/model"
 	"modelRT/mq"
 	"modelRT/pool"
@@ -74,7 +73,9 @@ var (
 
 func main() {
 	flag.Parse()
-	ctx := context.TODO()
+	startupSpanID := util.GenerateSpanID("startup")
+	ctx := context.WithValue(context.Background(), constants.CtxKeyTraceID, startupSpanID)
+	ctx = context.WithValue(ctx, constants.CtxKeySpanID, startupSpanID)
 
 	configPath := filepath.Join(*modelRTConfigDir, *modelRTConfigName+"."+*modelRTConfigType)
 	if _, err := os.Stat(configPath); os.IsNotExist(err) {
@@ -113,7 +114,7 @@ func main() {
 	}
 
 	// init postgresDBClient
-	postgresDBClient = database.InitPostgresDBInstance(modelRTConfig.PostgresDBURI)
+	postgresDBClient = database.InitPostgresDBInstance(ctx, modelRTConfig.PostgresDBURI)
 
 	defer func() {
 		sqlDB, err := postgresDBClient.DB()
@@ -171,8 +172,10 @@ func main() {
 
 	// async push event to rabbitMQ
 	go mq.PushUpDownLimitEventToRabbitMQ(ctx, mq.MsgChan)
+	// async push task message to rabbitMQ
+	go task.PushTaskToRabbitMQ(ctx, modelRTConfig.RabbitMQConfig, task.TaskMsgChan)
 
-	postgresDBClient.Transaction(func(tx *gorm.DB) error {
+	postgresDBClient.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
 		// load circuit diagram from postgres
 		// componentTypeMap, err := database.QueryCircuitDiagramComponentFromDB(cancelCtx, tx, parsePool)
 		// if err != nil {
@@ -246,22 +249,11 @@ func main() {
 		AllowCredentials: true,
 		MaxAge:           12 * time.Hour,
 	}))
-	// Register configuration middleware
-	engine.Use(middleware.ConfigMiddleware(modelRTConfig))
 	router.RegisterRoutes(engine, serviceToken)
 
-	// Swagger UI
+	if modelRTConfig.DeployEnv != constants.ProductionDeployMode {
-	engine.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))
+		engine.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))
-
+	}
-	// 注册 Swagger UI 路由
-	// docs.SwaggerInfo.BasePath = "/model"
-	// v1 := engine.Group("/api/v1")
-	// {
-	// 	eg := v1.Group("/example")
-	// 	{
-	// 		eg.GET("/helloworld", Helloworld)
-	// 	}
-	// }
 
 	server := http.Server{
 		Addr:    modelRTConfig.ServiceAddr,

middleware/config_middleware.go

@@ -1,3 +1,4 @@
+// Package middleware define gin framework middlewares
 package middleware
 
 import (
@@ -12,4 +13,4 @@ func ConfigMiddleware(modelRTConfig config.ModelRTConfig) gin.HandlerFunc {
 		c.Set("config", modelRTConfig)
 		c.Next()
 	}
-}
+}

middleware/limiter.go

@@ -1,3 +1,4 @@
+// Package middleware define gin framework middlewares
 package middleware
 
 import (

middleware/panic_recover.go

@@ -1,3 +1,4 @@
+// Package middleware define gin framework middlewares
 package middleware
 
 import (

middleware/token.go

@@ -1,3 +1,4 @@
+// Package middleware define gin framework middlewares
 package middleware
 
 import "github.com/gin-gonic/gin"

middleware/trace.go

@@ -1,7 +1,9 @@
+// Package middleware define gin framework middlewares
 package middleware
 
 import (
 	"bytes"
+	"context"
 	"io"
 	"strings"
 	"time"
@@ -27,6 +29,14 @@ func StartTrace() gin.HandlerFunc {
 		c.Set(constants.HeaderTraceID, traceID)
 		c.Set(constants.HeaderSpanID, spanID)
 		c.Set(constants.HeaderParentSpanID, parentSpanID)
+
+		// also inject into request context so c.Request.Context() carries trace values
+		reqCtx := c.Request.Context()
+		reqCtx = context.WithValue(reqCtx, constants.CtxKeyTraceID, traceID)
+		reqCtx = context.WithValue(reqCtx, constants.CtxKeySpanID, spanID)
+		reqCtx = context.WithValue(reqCtx, constants.CtxKeyParentSpanID, parentSpanID)
+		c.Request = c.Request.WithContext(reqCtx)
+
 		c.Next()
 	}
 }
@@ -78,7 +88,6 @@ func LogAccess() gin.HandlerFunc {
 			accessLog(c, "access_end", time.Since(start), reqBody, responseLogging)
 		}()
 		c.Next()
-		return
 	}
 }
 

model/recommend_islocal_cache.go

@@ -22,7 +22,7 @@ func GetNSpathToIsLocalMap(ctx context.Context, db *gorm.DB) (map[string]bool, e
 	var results []ComponentStationRelation
 	nspathMap := make(map[string]bool)
 
-	err := db.Table("component").
+	err := db.WithContext(ctx).Table("component").
 		Select("component.nspath, station.is_local").
 		Joins("join station on component.station_id = station.id").
 		Scan(&results).Error

task/handler_factory.go

@@ -36,12 +36,12 @@ func NewHandlerFactory() *HandlerFactory {
 }
 
 // RegisterHandler registers a handler for a specific task type
-func (f *HandlerFactory) RegisterHandler(taskType TaskType, handler TaskHandler) {
+func (f *HandlerFactory) RegisterHandler(ctx context.Context, taskType TaskType, handler TaskHandler) {
 	f.mu.Lock()
 	defer f.mu.Unlock()
 
 	f.handlers[taskType] = handler
-	logger.Info(context.Background(), "Handler registered",
+	logger.Info(ctx, "Handler registered",
 		"task_type", taskType,
 		"handler_name", handler.Name(),
 	)
@@ -61,11 +61,11 @@ func (f *HandlerFactory) GetHandler(taskType TaskType) (TaskHandler, error) {
 }
 
 // CreateDefaultHandlers registers all default task handlers
-func (f *HandlerFactory) CreateDefaultHandlers() {
+func (f *HandlerFactory) CreateDefaultHandlers(ctx context.Context) {
-	f.RegisterHandler(TypeTopologyAnalysis, &TopologyAnalysisHandler{})
+	f.RegisterHandler(ctx, TypeTopologyAnalysis, &TopologyAnalysisHandler{})
-	f.RegisterHandler(TypeEventAnalysis, &EventAnalysisHandler{})
+	f.RegisterHandler(ctx, TypeEventAnalysis, &EventAnalysisHandler{})
-	f.RegisterHandler(TypeBatchImport, &BatchImportHandler{})
+	f.RegisterHandler(ctx, TypeBatchImport, &BatchImportHandler{})
-	f.RegisterHandler(TaskType(TaskTypeTest), NewTestTaskHandler())
+	f.RegisterHandler(ctx, TaskType(TaskTypeTest), NewTestTaskHandler())
 }
 
 // BaseHandler provides common functionality for all task handlers
@@ -235,14 +235,14 @@ func (h *CompositeHandler) Name() string {
 }
 
 // DefaultHandlerFactory returns a HandlerFactory with all default handlers registered
-func DefaultHandlerFactory() *HandlerFactory {
+func DefaultHandlerFactory(ctx context.Context) *HandlerFactory {
 	factory := NewHandlerFactory()
-	factory.CreateDefaultHandlers()
+	factory.CreateDefaultHandlers(ctx)
 	return factory
 }
 
 // DefaultCompositeHandler returns a CompositeHandler with all default handlers
-func DefaultCompositeHandler() TaskHandler {
+func DefaultCompositeHandler(ctx context.Context) TaskHandler {
-	factory := DefaultHandlerFactory()
+	factory := DefaultHandlerFactory(ctx)
 	return NewCompositeHandler(factory)
 }

task/initializer.go

@@ -23,8 +23,8 @@ func InitTaskWorker(ctx context.Context, config config.ModelRTConfig, db *gorm.D
 
 	// Create task handler factory
 	handlerFactory := NewHandlerFactory()
-	handlerFactory.CreateDefaultHandlers()
+	handlerFactory.CreateDefaultHandlers(ctx)
-	handler := DefaultCompositeHandler()
+	handler := DefaultCompositeHandler(ctx)
 
 	// Create task worker
 	worker, err := NewTaskWorker(ctx, workerCfg, db, config.RabbitMQConfig, handler)
@@ -38,4 +38,4 @@ func InitTaskWorker(ctx context.Context, config config.ModelRTConfig, db *gorm.D
 	)
 
 	return worker, nil
-}
+}

task/queue_message.go

@@ -14,6 +14,8 @@ type TaskQueueMessage struct {
 	TaskID   uuid.UUID `json:"task_id"`
 	TaskType TaskType  `json:"task_type"`
 	Priority int       `json:"priority,omitempty"` // Optional, defaults to constants.TaskPriorityDefault
+	TraceID  string    `json:"trace_id,omitempty"` // propagated from the originating HTTP request
+	SpanID   string    `json:"span_id,omitempty"`  // spanID of the step that enqueued this message
 }
 
 // NewTaskQueueMessage creates a new TaskQueueMessage with default priority

task/queue_producer.go

@@ -11,11 +11,19 @@ import (
 	"modelRT/constants"
 	"modelRT/logger"
 	"modelRT/mq"
+	"modelRT/util"
 
 	"github.com/gofrs/uuid"
 	amqp "github.com/rabbitmq/amqp091-go"
 )
 
+// TaskMsgChan buffers task messages to be published to RabbitMQ asynchronously
+var TaskMsgChan chan *TaskQueueMessage
+
+func init() {
+	TaskMsgChan = make(chan *TaskQueueMessage, 10000)
+}
+
 // QueueProducer handles publishing tasks to RabbitMQ
 type QueueProducer struct {
 	conn *amqp.Connection
@@ -212,4 +220,39 @@ func (p *QueueProducer) GetQueueInfo() (*amqp.Queue, error) {
 // PurgeQueue removes all messages from the task queue
 func (p *QueueProducer) PurgeQueue() (int, error) {
 	return p.ch.QueuePurge(constants.TaskQueueName, false)
+}
+
+// PushTaskToRabbitMQ reads from taskChan and publishes to RabbitMQ.
+// Must be run as a goroutine; blocks until ctx is cancelled or taskChan is closed.
+func PushTaskToRabbitMQ(ctx context.Context, cfg config.RabbitMQConfig, taskChan chan *TaskQueueMessage) {
+	producer, err := NewQueueProducer(ctx, cfg)
+	if err != nil {
+		logger.Error(ctx, "init task queue producer failed", "error", err)
+		return
+	}
+	defer producer.Close()
+
+	for {
+		select {
+		case <-ctx.Done():
+			logger.Info(ctx, "push task to RabbitMQ stopped by context cancel")
+			return
+		case msg, ok := <-taskChan:
+			if !ok {
+				logger.Info(ctx, "task channel closed, exiting push loop")
+				return
+			}
+			traceID := msg.TraceID
+			if traceID == "" {
+				traceID = msg.TaskID.String() // fallback when no HTTP trace was propagated
+			}
+			taskCtx := context.WithValue(ctx, constants.CtxKeyTraceID, traceID)
+			taskCtx = context.WithValue(taskCtx, constants.CtxKeySpanID, util.GenerateSpanID("task-publish"))
+			taskCtx = context.WithValue(taskCtx, constants.CtxKeyParentSpanID, msg.SpanID)
+			if err := producer.PublishTaskWithRetry(taskCtx, msg.TaskID, msg.TaskType, msg.Priority, 3); err != nil {
+				logger.Error(taskCtx, "publish task to RabbitMQ failed",
+					"task_id", msg.TaskID, "error", err)
+			}
+		}
+	}
 }

task/worker.go

@@ -14,6 +14,7 @@ import (
 	"modelRT/logger"
 	"modelRT/mq"
 	"modelRT/orm"
+	"modelRT/util"
 
 	"github.com/gofrs/uuid"
 	"github.com/panjf2000/ants/v2"
@@ -282,6 +283,16 @@ func (w *TaskWorker) handleMessage(msg amqp.Delivery) {
 		return
 	}
 
+	// derive a per-task context carrying the trace propagated from the originating HTTP request
+	traceID := taskMsg.TraceID
+	if traceID == "" {
+		traceID = taskMsg.TaskID.String() // fallback when message carries no trace
+	}
+	taskCtx := context.WithValue(ctx, constants.CtxKeyTraceID, traceID)
+	taskCtx = context.WithValue(taskCtx, constants.CtxKeySpanID, util.GenerateSpanID("task-worker"))
+	taskCtx = context.WithValue(taskCtx, constants.CtxKeyParentSpanID, taskMsg.SpanID)
+	ctx = taskCtx
+
 	logger.Info(ctx, "Processing task",
 		"task_id", taskMsg.TaskID,
 		"task_type", taskMsg.TaskType,