import java.util.ArrayList;
import java.util.Collection;

public class TestBuffer{
    private Collection<Object> list = new ArrayList<Object>();
    private boolean insideGetBuffer = false;

    public TestBuffer(){
        System.out.println("Creating a TestBuffer");
    }

    synchronized public void add(Object item) {
        list.add(item);
    }

    synchronized public void remove(Object item) {
        if(insideGetBuffer){
            System.out.println("Broke Synchronization ");
            System.out.println(item);
        }
    }

    synchronized public void getBuffer() {
        insideGetBuffer = true;
        try{
            int i=0;
            for(Object item : list) {
                if(item != null){
                    i++;
                }
            }
        }finally{
            insideGetBuffer = false;
        }
    }
}