feat: add precise diagnostics and optional client copy logging controls

database/connector.go

@@ -7,6 +7,8 @@ import (
 	"errors"
 	"reflect"
 	"time"
+
+	"git.yuntuo.hk/k2safe/go-omni/internal/configdiag"
 )
 
 // PoolConfig contains only driver-independent settings. Connection credentials,
@@ -25,15 +27,29 @@ func DefaultPoolConfig() PoolConfig {
 }
 
 func (c PoolConfig) Validate() error {
-	if c.MaxOpenConns < 0 || c.MaxIdleConns < 0 {
-		return errors.New("database pool limits cannot be negative")
+	for _, f := range []struct {
+		name  string
+		value int
+	}{{"maxOpenConns", c.MaxOpenConns}, {"maxIdleConns", c.MaxIdleConns}} {
+		if f.value < 0 {
+			return configdiag.New(f.name, "must be nonnegative")
+		}
 	}
 	if c.MaxOpenConns > 0 && c.MaxIdleConns > c.MaxOpenConns {
-		return errors.New("max idle connections cannot exceed max open connections")
+		return configdiag.New("maxIdleConns", "must not exceed maxOpenConns")
 	}
-	if c.ConnMaxLifetime < 0 || c.ConnMaxIdleTime < 0 || c.PingTimeout <= 0 {
-		return errors.New("database timeouts are invalid")
+	for _, f := range []struct {
+		name  string
+		value time.Duration
+	}{{"connMaxLifetime", c.ConnMaxLifetime}, {"connMaxIdleTime", c.ConnMaxIdleTime}} {
+		if f.value < 0 {
+			return configdiag.New(f.name, "must be nonnegative")
+		}
 	}
+	if c.PingTimeout <= 0 {
+		return configdiag.New("pingTimeout", "must be positive")
+	}
+
 	return nil
 }