groupcache/errors.go

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2023-06-12 17:04:46 +00:00
package groupcache
// ErrNotFound should be returned from an implementation of `GetterFunc` to indicate the
// requested value is not available. When remote HTTP calls are made to retrieve values from
// other groupcache instances, returning this error will indicate to groupcache that the
// value requested is not available, and it should NOT attempt to call `GetterFunc` locally.
type ErrNotFound struct {
Msg string
}
func (e *ErrNotFound) Error() string {
return e.Msg
}
func (e *ErrNotFound) Is(target error) bool {
_, ok := target.(*ErrNotFound)
return ok
}
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// ErrRemoteCall is returned from `group.Get()` when a remote GetterFunc returns an
// error. When this happens `group.Get()` does not attempt to retrieve the value
// via our local GetterFunc.
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type ErrRemoteCall struct {
Msg string
}
func (e *ErrRemoteCall) Error() string {
return e.Msg
}
func (e *ErrRemoteCall) Is(target error) bool {
_, ok := target.(*ErrRemoteCall)
return ok
}