Question

I have Threads that listens to incoming HTTP messages , i want to enable other developer that use my code to be able to use the messages that i received in any time. I saw in some mobile OS you can implement class and override onRecive function to receive the messages .

is this the right architecture to use in this case? if yes how could i implemented and if its not what is the best way to do it.

Answer 1

Take a look at the Observer Pattern.

You can have an interface called MessageListener:

public interface MessageListener{
    void onMessage(String message);
}

Users of your library will create their own MessageListeners and will implement the onMessage method which defines what should be done when a message is received. They will also set (or register) this MessageListener with your “threads” before they are started.

Now whenever your thread gets a message, it will notify the listener(s) registered with it by calling the onMessage method.