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