C# and Java implement the notification API slightly differently. This section contains examples for each.

You can create a notification listener that provides information about the job’s current status. The status returned via the notification listener can be one of the following:

• Running
• Done
• Done with Error
• Failed

You can create a single generic notification listener that provides status messages for all jobs, or you can create job-specific notification listeners. If you create a job-specific notification listener, be sure to release it when your job completes. Otherwise, it can become a drain on your memory resources. The following examples show both generic and job-specific listeners.

public class NotificationExample
{
   public NotificationExample()
   {
      IExpressionClient Client = ClientFactory.GetExpressionClient("http://localhost:8080/SplusServer");
      // execute command asynchronously (return
      // immediately)
      SplusDataResult job = Client.Eval("sleep(10)", 
			new SynchronousJobStartup(2000));
      // register notification listener to be called when
      // any updates to jobs submitted by this client occur.
      Client.SetNotificationListener(HandleNotification);
      // Alternatively, you could set up a job-specific
      // notification listener that would only handle
      // notifications for a specific jobId using:
      //   Client.SetNotificationListener(job.JobId,
      //      HandleNotification);
      // NOTE: if setting a job-specific listener, be sure
      // to remove it using
      // RemoveNotificationListener(jobId) when it is no 
      // longer needed, to prevent excess memory buildup.
    }
   // method to be called when notification received
   private void HandleNotification(NotificationMessage
      message)
    {
      // if job status has changed, write message to
      // console.
      if (message.Type == eNotificationMessageType.eJobStatusChanged)
      {
         Console.WriteLine("Job " + message.JobId + " is now " + message.JobStatus);
      }
   }
}

public class NotificationExample implements NotificationListener
{
   public NotificationExample() throws NotAuthenticatedException, ApiException, ServerCreationException
   {
      ExpressionClient client = ClientFactory.getExpressionClient("http://localhost:8080/SplusServer");
         // execute command asynchronously (return 
         // immediately)
         SplusDataResult job = client.eval("sleep(10)",
           new SynchronousJobStartup(2000));
         // register notification listener to be called when
        // any updates to jobs submitted by this client
        // occur.
         client.setNotificationListener(this);
         // Alternately, you could set up a job-specific
         // notification listener that would only handle
         // notifications for a specific jobId using:
         //   client.setNotificationListener(this,
         // job.getJobId());
         // NOTE: if setting a job-specific listener, be
         // sure to remove it using
         // removeNotificationListener(jobId) once it is no
         // longer needed, to prevent excess memory
         // buildup.
      }
   // method to be called when notification received
   public void handleNotification(NotificationMessage message)
   {
         // if job status has changed, write message to
         // console.
      if (message.getType() ==
         eNotificationMessageType.eJobStatusChanged)
            {
                System.out.println("Job " +
                message.getJobId() + " is now " +
                message.getJobStatus().name());
            }
   }
}
}