feat: support for disable mon logs like sqlx (#3606)

Co-authored-by: Kevin Wan <wanjunfeng@gmail.com>

core/stores/mon/util.go

@@ -2,6 +2,8 @@ package mon
 
 import (
 	"context"
+	"encoding/json"
+	"errors"
 	"strings"
 	"time"
 
@@ -11,17 +13,53 @@ import (
 
 const mongoAddrSep = ","
 
+var errPlaceholder = errors.New("placeholder")
+
 // FormatAddr formats mongo hosts to a string.
 func FormatAddr(hosts []string) string {
 	return strings.Join(hosts, mongoAddrSep)
 }
 
 func logDuration(ctx context.Context, name, method string, startTime time.Duration, err error) {
+	logDurationWithDoc(ctx, name, method, startTime, err)
+}
+
+func logDurationWithDoc(ctx context.Context, name, method string,
+	startTime time.Duration, err error, docs ...any) {
 	duration := timex.Since(startTime)
 	logger := logx.WithContext(ctx).WithDuration(duration)
-	if err != nil {
-		logger.Infof("mongo(%s) - %s - fail(%s)", name, method, err.Error())
+	var content []byte
+	jerr := errPlaceholder
+	if len(docs) > 0 {
+		content, jerr = json.Marshal(docs)
+	}
+
+	if err == nil {
+		// jerr should not be non-nil, but we don't care much on this,
+		// if non-nil, we just log without docs.
+		if jerr != nil {
+			if logSlowMon.True() && duration > slowThreshold.Load() {
+				logger.Slowf("mongo(%s) - slowcall - %s - ok", name, method)
+			} else if logMon.True() {
+				logger.Infof("mongo(%s) - %s - ok", name, method)
+			}
+		} else {
+			if logSlowMon.True() && duration > slowThreshold.Load() {
+				logger.Slowf("mongo(%s) - slowcall - %s - ok - %s",
+					name, method, string(content))
+			} else if logMon.True() {
+				logger.Infof("mongo(%s) - %s - ok - %s",
+					name, method, string(content))
+			}
+		}
+
+		return
+	}
+
+	if jerr != nil {
+		logger.Errorf("mongo(%s) - %s - fail(%s)", name, method, err.Error())
 	} else {
-		logger.Infof("mongo(%s) - %s - ok", name, method)
+		logger.Errorf("mongo(%s) - %s - fail(%s) - %s",
+			name, method, err.Error(), string(content))
 	}
 }