Re: echoclient reading from server

From:

jimgardener <jimgardener@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Tue, 1 Jul 2008 06:41:31 -0700 (PDT)

Message-ID:

<566ce1e6-63aa-45db-bb38-7bd4072c8453@d19g2000prm.googlegroups.com>

I'm not sure why you chose to set up the connection with a
SocketChannel instead of a "plain" Socket. At the client end the
"traditional way" is probably easier than the stuff in java.nio.

i was learning nio using Greg Travis's ibmalphaworks tutorial on
nio.I tried out the MultiportEcho server program and thought i'd
write the client..

i modified the client code as below

private void initClient()throws IOException{
        InetSocketAddress isa=new
InetSocketAddress(InetAddress.getLocalHost(),port);
        SocketChannel sc=SocketChannel.open(isa) ;
        if(sc!=null)debug("connected to server");
        BufferedReader userin=new BufferedReader(new
InputStreamReader(System.in));
        String userinput;
        while((userinput=userin.readLine())!=null){
            buf.clear();
            buf.put(userinput.getBytes());
            buf.flip();
            sc.write(buf);
            if(userinput.equals("bye"))break;
        }

//trying to read from server
        while(true){
            buf.clear();
            int r=sc.read(buf);
            if(r <=0)break;
            buf.flip();
            String text=new String(buf.array());

            debug("read from server message of length="+text.length()
+"message:"+text);
        }

    }

problem here is that the echo would come only after client says bye to
the server..I would like the server to return the echo as soon as i
type in.Is that possible?

Also ,since i am allocating the ByteBuffer as of 1024 bytes..the
returned string ('text' in the above code) is 1024 bytes length and
this is displayed by debug() as a string with a lot of blanks at the
end

i would like to know if these can be rectified
thanks
jim