Multiple readers for InputStream in Java

Question

I have an InputStream from which I'm reading characters. I would like multiple readers to access this InputStream. It seems that a reasonable way to achieve this is to write incoming data to a StringBuffer or StringBuilder, and have the multiple readers read that. Unfortunately, StringBufferInputStream is deprecated. StringReader reads a string, not a mutable object that's continuously being updated. What are my options? Write my own?

Answer 1

Input stream work like this: once you read a portion from it, it's gone forever. You can't go back and re-read it. what you could do is something like this:

class InputStreamSplitter {
  InputStreamSplitter(InputStream toReadFrom) {
    this.reader = new InputStreamReader(toReadFrom);
  }
  void addListener(Listener l) {
    this.listeners.add(l);
  }
  void work() {
    String line = this.reader.readLine();
        while(line != null) {
      for(Listener l : this.listeners) {
        l.processLine(line);
      }
    }
  }
}

interface Listener {
  processLine(String line);
}

have all interested parties implement Listener and add them to InputStreamSplitter