Question

i want to know how to send data using the AMF format from my flex AIR project to a socket written in Java. I am getting CorruptedStreamException when sending data using writeUTFBytes() methods. Has anyone experienced similar problems? Also can AMF be used only if i am using LCDS only?

private SimpleServer(int port)
{
    System.out.println(">> Starting SimpleServer on port " + port);
    try
    {
        socket      = new ServerSocket(port);
        incoming    = socket.accept();
        objectInputStream   = new ObjectInputStream(incoming.getInputStream());
        objectOutputStream = new ObjectOutputStream(incoming.getOutputStream());
        boolean done = false;
        while (!done)
        {
            Object obj = objectInputStream.readObject();
            System.out.println( obj.toString() );
            if(obj == null)
            {
                done = true;
                incoming.close();
            }
        }
    }
    catch (Exception e)
    {
        System.out.println(e);
    }
}

And my as3 function to send data to the server is

        private function onSendClick():void
        {
            var host:String = "10.87.118.8";
            var port:int = 9090;

            var socket:Socket = new Socket();

            trace("Connect");
            socket.connect(host, port);

            trace("write");
            socket.writeUTFBytes("HelloSocket");

            trace("flush");
            socket.flush();
        }

Answer 1

AMF stands for Action Message Format.

It is a specification which defines how to transfer data between an ActionScript client and external system.

Therefore, many server side technologies incorporate AMF into their packages.
For example BlazeDS, GraniteDS, pyAMF, amfphp, …

Hence, to answer your question, no AMF can also be used outside of LCDS.
It is merely an “envelope” you can use to send your message (=data) in.

It should even work with sockets.
I believe there is an open source library called merapi that uses this principle.

Cheers