Disable action when analysis starts

My plugin does some analysis when an action performed. I want to disable my action when analysis starts and re-enable it after end of analysis. I tried to do it on update fuction but it looks like it is always holding the value it recieves. It doesn't change after analysis. How can I do it?

@Override
    public void update (AnActionEvent e) {
        e.getPresentation().setEnabled(!IntelliJAnalysis.isTaskRunning());
    }
}

public static boolean isTaskRunning() {
    if(tok==true) {
        return true;
    }
    else{
        return false;
    }
}