tg44 commented on issue #980:
URL:
https://github.com/apache/incubator-pekko/issues/980#issuecomment-1900165463
My usecase looks like this;
```
Data Source X
|
\|/
Datas
|
\|/
Process A
|
\|/
wireTap()----> Process FileIO Sink (main, can retry with backoff restart)
| | (if it is restarted with supervision it will fail
at every retry effectively killing the database save)
\|/ | (only switch after the main sink die and restart
up to the max limit)
database save |
|----> fallback Ignore Sink(logging) maybe.
```
I think we don't have a Sink which can handle the right side of the graph.
It could be something like;
```scala
def sinkWithFallback[T, Mat](factory: () => (exception: Option[Throwable])
=> Sink[T, Mat]): Sink[T, Mat]
```
And it should be easily implemented from `lazySink`, but `lazySink` is
internal (or at least the akka version I'm using rn has it in internal), so it
is messy...
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