fishy commented on a change in pull request #2298:
URL: https://github.com/apache/thrift/pull/2298#discussion_r560290054
##########
File path: lib/go/thrift/exception.go
##########
@@ -26,19 +26,86 @@ import (
// 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 {
- if t, ok := err.(TTransportException); ok {
- return NewTTransportException(t.TypeId(), prepend+t.Error())
+ msg := prepend + err.Error()
+
+ if te, ok := err.(TException); ok {
+ switch te.TExceptionType() {
+ case TExceptionTypeTransport:
+ if t, ok := err.(TTransportException); ok {
+ return NewTTransportException(t.TypeId(), msg)
+ }
+ case TExceptionTypeProtocol:
+ if t, ok := err.(TProtocolException); ok {
+ return
NewTProtocolExceptionWithType(t.TypeId(), errors.New(msg))
+ }
+ case TExceptionTypeApplication:
+ if t, ok := err.(TApplicationException); ok {
+ return NewTApplicationException(t.TypeId(), msg)
+ }
+ }
+
+ return wrappedTException{
+ err: errors.New(msg),
Review comment:
@tte
1. the old `PrependError` doesn't keep the original error either, so this is
not a regression :)
2. that being said, this is a reasonable proposal and trivial to implement
so I'll just do it
3. I'm curious, which TProtocol/TTransport combination do you use to
actually get `context.Canceled` to be wrapped under those `ReadFieldX`
functions? I don't think any of the TProtocol implementation would return
`context.Canceled` as the error
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