public class SubmitBean  {

    String output = ":";
    public String getOutput()  {
        return output;
    }
    
    public void setOutput(String output)  {
        this.output = output;
    }


    String value;
    public String getValue()  {
        return value;
    }
    
    public void setValue(String value)  {
        this.value = value;
    }
    
    int counter = 0;
    public int getCounter()  {
        return ++counter;
    }

    boolean doubleSubmit = false;
    int lastCounter;
    public void setCounter(int formCounter)  {
        if (formCounter == lastCounter)  {
            doubleSubmit = true;
        }
        lastCounter = formCounter;
    }

    public String submit()  {
try {
Thread.sleep(500);
} catch (Exception e)  {
}
        if (doubleSubmit)  {
            System.out.println("double submit!");
            //skip processing of this form request
            doubleSubmit = false;
            return "success";
        }
        output = output + value;
        return "success";
    }
}