errors/errors.go

@@ -356,6 +356,106 @@ func Retryable(err error) error {
 	return &retryableError{err: err}
 }
 
+type IsRetryableFunc func(error) bool
+
+var (
+	RetrayableOracleErrors = []IsRetryableFunc{
+		func(err error) bool {
+			errmsg := err.Error()
+			switch {
+			case strings.Contains(errmsg, `ORA-`):
+				return true
+			case strings.Contains(errmsg, `can not assign`):
+				return true
+			case strings.Contains(errmsg, `can't assign`):
+				return true
+			}
+			return false
+		},
+	}
+	RetrayablePostgresErrors = []IsRetryableFunc{
+		func(err error) bool {
+			errmsg := err.Error()
+			switch {
+			case strings.Contains(errmsg, `number of field descriptions must equal number of`):
+				return true
+			case strings.Contains(errmsg, `not a pointer`):
+				return true
+			case strings.Contains(errmsg, `values, but dst struct has only`):
+				return true
+			case strings.Contains(errmsg, `struct doesn't have corresponding row field`):
+				return true
+			case strings.Contains(errmsg, `cannot find field`):
+				return true
+			case strings.Contains(errmsg, `cannot scan`) || strings.Contains(errmsg, `cannot convert`):
+				return true
+			case strings.Contains(errmsg, `failed to connect to`):
+				return true
+			}
+			return false
+		},
+	}
+	RetryableMicroErrors = []IsRetryableFunc{
+		func(err error) bool {
+			switch verr := err.(type) {
+			case *Error:
+				switch verr.Code {
+				case 401, 403, 408, 500, 501, 502, 503, 504:
+					return true
+				default:
+					return false
+				}
+			case *retryableError:
+				return true
+			}
+			return false
+		},
+	}
+	RetryableGoErrors = []IsRetryableFunc{
+		func(err error) bool {
+			switch verr := err.(type) {
+			case interface{ SafeToRetry() bool }:
+				return verr.SafeToRetry()
+			case interface{ Timeout() bool }:
+				return verr.Timeout()
+			}
+			switch {
+			case errors.Is(err, io.EOF), errors.Is(err, io.ErrUnexpectedEOF):
+				return true
+			case errors.Is(err, context.DeadlineExceeded):
+				return true
+			case errors.Is(err, io.ErrClosedPipe), errors.Is(err, io.ErrShortBuffer), errors.Is(err, io.ErrShortWrite):
+				return true
+			}
+			return false
+		},
+	}
+	RetryableGrpcErrors = []IsRetryableFunc{
+		func(err error) bool {
+			st, ok := status.FromError(err)
+			if !ok {
+				return false
+			}
+			switch st.Code() {
+			case codes.Unavailable, codes.ResourceExhausted:
+				return true
+			case codes.DeadlineExceeded:
+				return true
+			case codes.Internal:
+				switch {
+				case strings.Contains(st.Message(), `transport: received the unexpected content-type "text/html; charset=UTF-8"`):
+					return true
+				case strings.Contains(st.Message(), io.ErrUnexpectedEOF.Error()):
+					return true
+				case strings.Contains(st.Message(), `stream terminated by RST_STREAM with error code: INTERNAL_ERROR`):
+					return true
+				}
+			}
+			return false
+		},
+	}
+)
+
 // Unwrap provides error wrapping
 func (e *retryableError) Unwrap() error {
 	return e.err
@@ -370,77 +470,11 @@ func (e *retryableError) Error() string {
 }
 
 // IsRetryable checks error for ability to retry later
-func IsRetryable(err error) bool {
-	switch verr := err.(type) {
-	case *Error:
-		switch verr.Code {
-		case 401, 403, 408, 500, 501, 502, 503, 504:
+func IsRetryable(err error, fns ...IsRetryableFunc) bool {
+	for _, fn := range fns {
+		if ok := fn(err); ok {
 			return true
-		default:
-			return false
-		}
-	case *retryableError:
-		return true
-	case interface{ SafeToRetry() bool }:
-		return verr.SafeToRetry()
-	case interface{ Timeout() bool }:
-		return verr.Timeout()
-	}
-
-	switch {
-	case errors.Is(err, io.EOF), errors.Is(err, io.ErrUnexpectedEOF):
-		return true
-	case errors.Is(err, context.DeadlineExceeded):
-		return true
-	case errors.Is(err, io.ErrClosedPipe), errors.Is(err, io.ErrShortBuffer), errors.Is(err, io.ErrShortWrite):
-		return true
-	default:
-		st, ok := status.FromError(err)
-		if !ok {
-			errmsg := err.Error()
-			if strings.Contains(errmsg, `number of field descriptions must equal number of`) {
-				return true
-			}
-			if strings.Contains(errmsg, `not a pointer`) {
-				return true
-			}
-			if strings.Contains(errmsg, `values, but dst struct has only`) {
-				return true
-			}
-			if strings.Contains(errmsg, `struct doesn't have corresponding row field`) {
-				return true
-			}
-			if strings.Contains(errmsg, `cannot find field`) {
-				return true
-			}
-			if strings.Contains(errmsg, `cannot scan`) || strings.Contains(errmsg, `cannot convert`) {
-				return true
-			}
-			if strings.Contains(errmsg, `failed to connect to`) {
-				return true
-			}
-
-			return false
-		}
-		switch st.Code() {
-		case codes.Unavailable, codes.ResourceExhausted:
-			return true
-		case codes.DeadlineExceeded:
-			return true
-		case codes.Internal:
-			if strings.Contains(st.Message(), `transport: received the unexpected content-type "text/html; charset=UTF-8"`) {
-				return true
-			}
-			if strings.Contains(st.Message(), io.ErrUnexpectedEOF.Error()) {
-				return true
-			}
-			if strings.Contains(st.Message(), `stream terminated by RST_STREAM with error code: INTERNAL_ERROR`) {
-				return true
-			}
-		default:
-			return false
 		}
 	}
-
 	return false
 }

errors/errors_test.go

@@ -8,6 +8,13 @@ import (
 	"testing"
 )
 
+func TestIsRetrayable(t *testing.T) {
+	err := fmt.Errorf("ORA-")
+	if !IsRetryable(err, RetrayableOracleErrors...) {
+		t.Fatalf("IsRetrayable not works")
+	}
+}
+
 func TestMarshalJSON(t *testing.T) {
 	e := InternalServerError("id", "err: %v", fmt.Errorf("err: %v", `xxx: "UNIX_TIMESTAMP": invalid identifier`))
 	_, err := json.Marshal(e)