Question

I’m already working on this for weeks to get it working but without success. I’m using Javafx and java for implementing a small chat programm using the smack API (xmpp). The problem is how to get the received messages from java to javafx. The code below is actualy working when I have variable with a static string like “test message” and calling postMessage in java to send it to javafx. But how do I get another object (MessageListener) from java calling postMessage?

public class Java_callback implements RunnableFuture {
FXListener listener;

public String testmsg;


public Java_callback(FXListener listener) {
    this.listener = listener;

}

@Override
public void run() throws Exception {

    postMessage(testmsg);
}

public void postMessage(final String msg) {
    Entry.deferAction(new Runnable() {
        @Override
        public void run() {
            listener.callback(msg);
        }
    });
}
}

Here the code for processing the message. This part somehow need to call postMessage from the code above.

    public void xmpp_create_chat(String msg) {

    ChatManager chatmanager = connection.getChatManager();
    Chat newChat = chatmanager.createChat("admin@unfc", new MessageListener() {

        @Override
        public void processMessage(Chat chat, Message message) {
            //msgArray.add( new String("Received message: " + message.getBody()) );
            //msg_return = "blabla";

            //java_callback.postMessage(msg_return);
            //test.postMessage(message.getBody());
            //System.out.println("Received message: " + message);

        }
    });

Answer 1

If you make postMessage() static, as in:

public static void postMessage(final String msg);

… then you can make a static method call to it from processMessage(), as in:

Java_callback.postMessage(msg_return);

UPDATE: Change your initializion of listener as well.

private static FXListener listener;

Hopefully this doesn’t break something outside of the provided code 🙂