Java

Get the LastErrorText for an Asynchronous Method Call

See more Async Examples

Demonstrates how to get the LastErrorText information for a Chilkat method called 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 requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSocket socket = new CkSocket();

    // The Async call simply creates the task.  The "Connect" method has not yet been called.
    int maxWaitMs = 5000;
    // Let's intentionally cause this connect to fail by giving it an invalid domain..
    CkTask task = socket.ConnectAsync("amazonbladflakjsdflksadjf.com",443,true,maxWaitMs);
    if (socket.get_LastMethodSuccess() == false) {
        System.out.println(socket.lastErrorText());
        return;
        }

    // Start the background thread to run the task.
    success = task.Run();
    if (!success) {
        System.out.println(task.lastErrorText());

        return;
        }

    // The application is now free to do anything else

    // For this example, we'll simply sleep and periodically
    // check to see if the Socket Connect if finished.
    while (task.get_Finished() != true) {
        // Sleep 1 ms.
        task.SleepMs(1);
        }

    // If the task completed, it means the method (in this case the Connect method) was called and returned success or failure.
    if (task.get_StatusInt() != 7) {
        System.out.println("Task did not complete.");
        System.out.println("task status: " + task.status());

        return;
        }

    // Get the success/failure of the Connect
    // (This is the return value of the Connect method had it been called synchronously)
    success = task.GetResultBool();
    if (success == false) {
        // Get the LastErrorText for the Connect method call.
        // Had we called Connect synchronously, we would've simply accessed the socket object's LastErrorText property.
        // Instead, we get the task object's ResultErrorText.
        System.out.println(task.resultErrorText());
        }
    else {
        System.out.println("Connect succeeded.");
        }
  }
}