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- /*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
- package thrift
- import (
- "errors"
- )
- // Generic Thrift exception
- type TException interface {
- error
- TExceptionType() TExceptionType
- }
- // Prepends additional information to an error without losing the Thrift exception interface
- func PrependError(prepend string, err error) error {
- msg := prepend + err.Error()
- var te TException
- if errors.As(err, &te) {
- switch te.TExceptionType() {
- case TExceptionTypeTransport:
- if t, ok := err.(TTransportException); ok {
- return prependTTransportException(prepend, t)
- }
- case TExceptionTypeProtocol:
- if t, ok := err.(TProtocolException); ok {
- return prependTProtocolException(prepend, t)
- }
- case TExceptionTypeApplication:
- var t TApplicationException
- if errors.As(err, &t) {
- return NewTApplicationException(t.TypeId(), msg)
- }
- }
- return wrappedTException{
- err: err,
- msg: msg,
- tExceptionType: te.TExceptionType(),
- }
- }
- return errors.New(msg)
- }
- // TExceptionType is an enum type to categorize different "subclasses" of TExceptions.
- type TExceptionType byte
- // TExceptionType values
- const (
- TExceptionTypeUnknown TExceptionType = iota
- TExceptionTypeCompiled // TExceptions defined in thrift files and generated by thrift compiler
- TExceptionTypeApplication // TApplicationExceptions
- TExceptionTypeProtocol // TProtocolExceptions
- TExceptionTypeTransport // TTransportExceptions
- )
- // WrapTException wraps an error into TException.
- //
- // If err is nil or already TException, it's returned as-is.
- // Otherwise it will be wraped into TException with TExceptionType() returning
- // TExceptionTypeUnknown, and Unwrap() returning the original error.
- func WrapTException(err error) TException {
- if err == nil {
- return nil
- }
- if te, ok := err.(TException); ok {
- return te
- }
- return wrappedTException{
- err: err,
- msg: err.Error(),
- tExceptionType: TExceptionTypeUnknown,
- }
- }
- type wrappedTException struct {
- err error
- msg string
- tExceptionType TExceptionType
- }
- func (w wrappedTException) Error() string {
- return w.msg
- }
- func (w wrappedTException) TExceptionType() TExceptionType {
- return w.tExceptionType
- }
- func (w wrappedTException) Unwrap() error {
- return w.err
- }
- var _ TException = wrappedTException{}
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