Question

It is possible to skip data from an InputStream

in.skip(in.available());

but if you want to do something similar with OutputStream I’ve found

socket.getOutputStream().flush();

But that’s not the same, flush will transmit the buffered data instead of ignoring it.

Is there any possibility of deleting buffered data?

Thanks

EDIT

The situation is a client-server application, when a new command is send (from client)
it (try) to be sure that the answer read will correspond to the last command sent.

Some commands are sent by (human-fired) events, and others are sent by automatic threads.
If a command is on buffer and a new one is send then the answer will be for the first one, causing desynchronization.

Of course a synchronized method plus a flag called “waitingCommand” could be the safer approach but as the communication is not reliable, this approach is slow (depends on timeouts ). That’s why I’ve asked for the skip method.

Answer 1

I’m no sure if it makes sense, but you can try:

class MyBufferedOutputStream extends java.io.BufferedOutputStream {

    public MyBufferedOutputStream(OutputStream out) {
        super(out);
    }

    /** throw away everything in a buffer without writing it */
    public synchronized void skip() {
        count = 0; 
    }

}