Java

Async Accept Socket Connection

See more Socket/SSL/TLS Examples

Demonstrates how to get the connected client socket after accepting a connection asynchronously. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    //  This example assumes the Chilkat Socket API to have been previously unlocked.
    //  See Socket Unlock Sample for sample code.

    CkSocket listenSocket = new CkSocket();

    //  Bind to a port and listen.
    //  This example will listen at port 5555 and allows for a backlog
    //  of 25 pending connection requests.
    success = listenSocket.BindAndListen(5555,25);
    if (success != true) {
        System.out.println(listenSocket.lastErrorText());
        return;
        }

    //  Start a background task to accept an incoming connection ...
    int maxWaitMs = 20000;
    CkTask acceptTask = listenSocket.AcceptNextConnectionAsync(maxWaitMs);
    acceptTask.Run();

    //  ...
    //  ...
    //  ...

    //  Imagine at this point the task has completed successfully,
    //  and a connection was accepted.  Here's how to get the connected socket...
    CkSocket connectedClient = new CkSocket();
    success = connectedClient.LoadTaskResult(acceptTask);

    //  Here's how it works:  The AcceptNextConnection method would normally
    //  return a socket object when called synchronously.  When called asynchronously,
    //  it cannot do so because it returns the task object.  When the async method
    //  (running in a background thread) completes, the socket object that is the client
    //  connection is contained within the task object.
    //  
    //  This can be generalized for any case where a Chilkat method returns an object.
    //  The async version of that method is such that the object returned in the background
    //  thread is contained within the task object.

    //  To get the result object, we create a new object instance of that type.
    //  In this case, we create a socket object (connectedClient).  There is a LoadTaskResult
    //  method in all Chilkat classes that can be a return value of an async method call.
    //  The LoadTaskResult method transfers the returned object from the task to the caller.
  }
}