支持空表

collect.go

@@ -9,6 +9,7 @@ import (
 	"git.nonolive.co/eson.hsm/databoard-collect/database"
 	"github.com/google/uuid"
 	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
 )
 
 // collectCopyCountLiveAnchors 从mongodb里复制需要增量的值
@@ -18,10 +19,17 @@ func collectCopyCountLiveAnchors(cxt *WorkerContext) {
 	for !ps.IsClose() {
 
 		liveanchor := &CountLiveAnchors{}
-		if ok, err := db.T.CountLiveAnchors.OrderBy("create_at desc").Limit(1).Get(liveanchor); ok {
-			last := liveanchor.CreateAt
-			log.Println("last: ", last)
-			cur, err := mdb.C.CountLiveAnchors.Find(context.TODO(), bson.M{"create_at": bson.M{"$gt": last}})
+		ok, err := db.T.CountLiveAnchors.OrderBy("create_at desc").Limit(1).Get(liveanchor)
+		if ok || (ok == false && err == nil) {
+
+			var cur *mongo.Cursor
+			if liveanchor == nil {
+				cur, err = mdb.C.CountLiveAnchors.Find(context.TODO(), bson.M{"create_at": bson.M{"$gt": "2020-05-30"}})
+			} else {
+				last := liveanchor.CreateAt
+				log.Println("last: ", last)
+				cur, err = mdb.C.CountLiveAnchors.Find(context.TODO(), bson.M{"create_at": bson.M{"$gt": last}})
+			}
 			if err != nil {
 				log.Println(err)
 				ps.Wait(time.Second * 5)
@@ -50,9 +58,6 @@ func collectCopyCountLiveAnchors(cxt *WorkerContext) {
 					log.Println(err)
 				}
 			}
-		} else {
-			log.Println(err)
-			ps.Wait(time.Second * 5)
 		}
 	}
 }

worker.go

@@ -17,26 +17,25 @@ func (cxt *WorkerContext) Done() {
 
 // Worker 主进程
 type Worker struct {
-	wg  *sync.WaitGroup
 	cxt *WorkerContext
 }
 
 var worker = func() *Worker {
 	w := &Worker{}
 	w.cxt = &WorkerContext{}
-	w.wg = &sync.WaitGroup{}
+	w.cxt.wg = &sync.WaitGroup{}
 	return w
 }()
 
 // Handler 处理方法
 func (w *Worker) Handler(handleFunc func(cxt *WorkerContext)) {
-	w.wg.Add(1)
+	w.cxt.wg.Add(1)
 	go handleFunc(w.cxt)
 }
 
 // Run 运行
 func (w *Worker) Run() {
 	log.Println("worker running")
-	w.wg.Wait()
+	w.cxt.wg.Wait()
 	log.Println("worker stop")
 }