1

dbpool.go

@@ -140,20 +140,41 @@ func (this *dbPool) LoopLoad(
 	watchTimeCb func() int64,
 	sqlCb func(int64) string,
 	params []string,
-	nextTimeCb func() time.Duration,
+	nextTimeCb func() int64,
-	nextRoundCb func() time.Duration,
+	nextRoundCb func() int64,
 	doCb func(*DataSet) bool) {
-	{
+	newDataCond := sync.NewCond(new(sync.Mutex))
+	chTimer := make(chan int64)
+
 	go func () {
+		var lastMaxIdx int64
+		for true {
+			hasNewDdata := false
 			this.RawQuery(
 				dataSource,
-				fmt.Sprintf("SELECT MAX(idx) FROM %s", watchTable),
+				fmt.Sprintf("SELECT MAX(idx) AS max_idx FROM %s", watchTable),
 				[]string{},
 				func (err error, ds *DataSet) {
-				})
+					if err != nil {
-			time.Sleep(time.Second * 3)
+						return
-		}()
 					}
+					if ds.Next() {
+						idx := q5.ToInt64(ds.GetByName("max_idx"))
+						if idx > lastMaxIdx {
+							lastMaxIdx = idx
+							hasNewDdata = true
+						}
+					}
+				})
+			if hasNewDdata {
+				newDataCond.Broadcast()
+			} else {
+				time.Sleep(time.Second * time.Duration(watchTimeCb()))
+			}
+		}
+	}()
+
+	{
 		var lastIdx int64
 		for true {
 			hasNextData := false
@@ -163,7 +184,9 @@ func (this *dbPool) LoopLoad(
 				sql,
 				params,
 				func (err error, ds *DataSet) {
-				if err == nil {
+					if err != nil {
+						return
+					}
 					for ds.Next() {
 						idx := q5.ToInt64(ds.GetByName("idx"))
 						if !doCb(ds) {
@@ -174,13 +197,16 @@ func (this *dbPool) LoopLoad(
 						}
 						hasNextData = true
 					}
-				}
 				})
 			if hasNextData {
-			time.Sleep(nextTimeCb())
+				chTimer <- nextTimeCb()
 			} else {
 				lastIdx = 0
-			time.Sleep(nextRoundCb())
+				chTimer <- nextRoundCb()
+			}
+			newDataCond.L.Lock()
+			newDataCond.Wait()
+			newDataCond.L.Unlock()
 		}
 	}
 }