Filtro que adiciona cabeçalhos HTTP que evitam cache. Baseado em: https://github.com/dropwizard/dropwizard/blob/master/dropwizard-servlets/src/main/java/io/dropwizard/servlets/CacheBustingFilter.java

CacheBustingFilter.java

import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class CacheBustingFilter implements Filter {

    private static final String CACHE_CONTROL = "Cache-Control";
    private static final String CACHE_SETTINGS = "must-revalidate,no-cache,no-store";

    @Override
    public void doFilter(ServletRequest request,
                         ServletResponse response,
                         FilterChain chain) throws IOException, ServletException {
        if (response instanceof HttpServletResponse) {
            final HttpServletResponse resp = (HttpServletResponse) response;
            resp.setHeader(CACHE_CONTROL, CACHE_SETTINGS);
        }
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {}

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {}
}