Merge remote-tracking branch 'origin/master'

svc/queries/product_pricing.go

@@ -3,10 +3,14 @@ package queries
 import (
 	"bssapp-backend/db"
 	"bssapp-backend/models"
+	"context"
+	"database/sql"
+	"strings"
+	"time"
 )
 
-func GetProductPricingList() ([]models.ProductPricing, error) {
-	rows, err := db.MssqlDB.Query(`
+func GetProductPricingList(ctx context.Context) ([]models.ProductPricing, error) {
+	const query = `
 		WITH base_products AS (
 			SELECT
 				LTRIM(RTRIM(ProductCode)) AS ProductCode,
@@ -160,9 +164,32 @@ func GetProductPricingList() ([]models.ProductPricing, error) {
 		LEFT JOIN stock_totals st
 			ON st.ItemCode = bp.ProductCode
 		ORDER BY bp.ProductCode;
-	`)
-	if err != nil {
-		return nil, err
+	`
+
+	var (
+		rows    *sql.Rows
+		rowsErr error
+	)
+	for attempt := 1; attempt <= 3; attempt++ {
+		var err error
+		rows, err = db.MssqlDB.QueryContext(ctx, query)
+		if err == nil {
+			rowsErr = nil
+			break
+		}
+		rowsErr = err
+		if ctx.Err() != nil || !isTransientMSSQLNetworkError(err) || attempt == 3 {
+			break
+		}
+		wait := time.Duration(attempt*300) * time.Millisecond
+		select {
+		case <-ctx.Done():
+			break
+		case <-time.After(wait):
+		}
+	}
+	if rowsErr != nil {
+		return nil, rowsErr
 	}
 	defer rows.Close()
 
@@ -191,3 +218,17 @@ func GetProductPricingList() ([]models.ProductPricing, error) {
 
 	return out, nil
 }
+
+func isTransientMSSQLNetworkError(err error) bool {
+	if err == nil {
+		return false
+	}
+	e := strings.ToLower(err.Error())
+	return strings.Contains(e, "i/o timeout") ||
+		strings.Contains(e, "timeout") ||
+		strings.Contains(e, "wsarecv") ||
+		strings.Contains(e, "connection attempt failed") ||
+		strings.Contains(e, "no connection could be made") ||
+		strings.Contains(e, "broken pipe") ||
+		strings.Contains(e, "connection reset")
+}