Java Development Tools

Hi

My Jdeveloper version is 12.2.1.1.0

I have a client application that sends message through JMS to My ADF web application.

My ADF application receives the messages successfully.

My problem is that I want to insert new row in an iterator upon receiving this message.

This is my managed bean

public class DmsDhamanDocTrx implements MessageListener {
private TopicSession session;
private TopicSubscriber subscriber;
protected TopicConnectionFactory tconFactory;
private boolean quit = false;
private TopicPublisher tpub;

And this is the body on the onMessage method

@Override
public void onMessage(Message msg) {
    
System.out.println("On Message Fired ************************"); 
 
    
if (msg instanceof TextMessage) {
        
try {   
            
String command = msg.getStringProperty("CMD");
            
System.out.println("command >>" + command);
            
System.out.println("Messages Recivied");        
 
            
if (command.equalsIgnoreCase("SCAN_DONE")) {               
 
                    
DCBindingContainer currentinding = (DCBindingContainer) BindingContext.getCurrent().getCurrentBindingsEntry();
                      
DCIteratorBinding iterator= currentinding.findIteratorBinding(“Iterator_name”);
            
}          
 
        
} catch (Exception e) {  
            
e.printStackTrace();
        
}
    
}
}

The error java.lang.NullPointerException is raised at the following lines

                         DCBindingContainer currentinding = (DCBindingContainer) BindingContext.getCurrent().getCurrentBindingsEntry();

                        DCIteratorBinding iterator= currentinding.findIteratorBinding(“Iterator_name”);

can any one help me please