Socket: Allow Writing and Receiving on the same socket

Hi experts,

After accept the socket Socket socket = serverSocket.accept() in a object
How can I achieve the followings simutaneously?
1) non-stop monitoring socket for incoming message, received message have to pass to outer object
2) allow other objects to send message?

It seems to me that something called "callback" interface has to be implemented, I am looking for sample codes of this...  and explanations...
alenwongAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Siva Prasanna KumarPrincipal Solutions ArchitectCommented:
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
CEHJCommented:
>>1) non-stop monitoring socket for incoming message, received message have to pass to outer object

All you need is

a. a separately threaded loop
b. a method on the outer object to call with the message as a parameter

>>2) allow other objects to send message?

An interface to the socket's output stream allowing the message to be passed as a parameter
0
alenwongAuthor Commented:
shivaspk: don't sure if there's any implementation based on Socket and ServerSocket

CEHJ: it would be grateful if you could provide example...  
0
HTML5 and CSS3 Fundamentals

Build a website from the ground up by first learning the fundamentals of HTML5 and CSS3, the two popular programming languages used to present content online. HTML deals with fonts, colors, graphics, and hyperlinks, while CSS describes how HTML elements are to be displayed.

Mayank SAssociate Director - Product EngineeringCommented:
Have a look at this to get an idea of a sample multi-threaded server:

http://www.experts-exchange.com/Programming/Languages/Java/Q_21757720.html#16084277

In the run () method, you could loop and receive values:

while ( running )
{
  String s = br.readLine () ;
  System.out.println ( s ) ;
}

For sending, you can provide a method like:

public void send ( String s )
{
  writer.println ( s ) ;
}
0
alenwongAuthor Commented:
mayankeagle: don't sure if this segment allows only sequenial read and write, that means a read write write or write write read is not possible....  

    try
    {
      BufferedReader reader = new BufferedReader ( new InputStreamReader ( s.getInputStream () ) ) ;
      PrintWriter writer = new PrintWriter ( s.getOutputStream (), true ) ;
      while ( true )
      {
        // use 'reader' to read commands from the client
        // use 'writer' to send response to the client
      }
    }
0
Mayank SAssociate Director - Product EngineeringCommented:
You need to change it slightly. the ServerThread will have:

class ServerThread implements Runnable
{
  private Socket s ;
  private BufferedReader reader ;
  private PrintWriter writer ;
  public ServerThread ( Socket s )
  {
    this.s = s ;
    // initialize reader and writer here, as in the run () method
    ..
  }
0
ksivananthCommented:
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Java

From novice to tech pro — start learning today.