Question

I’m trying to create my first server, a simple chat server.

I have a Runnable class called cCleanThread that creates a thread that uses sleep to call
cGlobals.mUserList.Clean(); every 10 seconds.

I would like to have it so each instance of cCleanThread would have its own mUserList object. I can’t figure out a easy way to do this.

I figured I would somw how have to pass in a parameter for a mUserList when I create my cCleanThread object?

code

public class cCleanThread   implements Runnable {

Thread runner;
public cCleanThread() {
}

public cCleanThread(String threadName) {
    runner = new Thread(this, threadName); // (1) Create a new thread.
    System.out.println(runner.getName());
    runner.start(); // (2) Start the thread.
}

public void run() {
    //Display info about this particular thread
    System.out.println(Thread.currentThread());
     while(true)
     {

         try {
            Thread.sleep(20*1000);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
         cGlobals.mUserList.Clean(); 
     }
}
}

Answer 1

Pass the mUserList to the thread constructor:

public class cCleanThread implements Runnable {

    private final UserList localUserList;

    public cCleanThread(String threadName, UserList mUserList) {
        this.localUserList = mUserList;
        //...
    }

    public void run() {
        //...
        localUserList.Clean(); 
    }
}

The simply create thread with different arguments:

Thread first  = new cCleanThread("Thread-Foo", fooUsers);
Thread second = new cCleanThread("Thread-Bar", barUsers);