Java Stream Api: how to get the number of elements without terminating the stream?

Question

Java

I have a stream:

Files.list(tmpDir)
      .filter(this::isCacheFileExpired)
      
      // здесь я хочу заллогировать сколько файлов будет удаленно
      
      .forEach(this::deleteCacheFile);

And in place of the comment, you need to embed a code that logs the number of deleted (that is, filtered) files.
What operator can do this?
Thanks in advance!

Answer 1

It is impossible, this number will appear only after the end of the stream.