如何从Java线程触发事件监听器

Question

I have thread with Socket inside. When soket receives some data, I need to fire event (using my sublassed EventObject). Event listeners is added from main thread (to some list?). is this OK?

Pseudocode:



public class SocketThread extends Thread{
    private Socket socket;
    private MyEventListener eventListener;

    public SocketThread(Socket socket, MyEventListener eventListener) {
        this.socket=socket;
        this.eventListener=eventListener;
    }

   public void run() {
        get socket input stream...
        get socket output stream...
        when data received, call process(data) 
    }

   void process(data){
     synchronized(this){
        myEvent event=new MyEvent(data);
        eventListener.fireSomeEvent(myEvent );
    }
}


// main thread

ServerSocket serverSocket=new ServerSocket(host,port);
Socket socket= serverSocket.accept();
ClientThread cthr = new SocketThread (sckt,new MyEventListener(){ 
    void fireSomeEvent(MyEvent event){
    //some code
    }
});

Answer 1

This seems perfectly fine. As long as you're not changing the eventListener there is no concurrency problem that way. But be aware that fireSomeEvent() will be ran from the SocketThread . If you're doing something that is not thread-safe there, you might (will) encounter problems. So that's where you'll need some sort of synchronization.