Servlet 过滤器无法正常运行

Question

After some research and trial error, I've found a method that would allow me to add servlet filters programmatically while preserving their order as desired without using web.xml and annotations. Based upon the method found, the filters aren't functioning as I've understand it represented by the picture in this thread . From my logs, steps 5, 6, & 7 of filter-chain invocation never executed.

On successful web app context startup:

GodFilter.init
Filter1.init
Filter2.init
...
FilterFinal.init

When browsing the web app:

GodFilter.doFilter
Filter1.doFilter
GodFilterChain.doFilter
Filter2.doFilter
GodFilterChain.doFilter
...
FilterFinal.dofilter
MyServlet.service(ServletRequest request, ServletResponse response)
MyServlet.service(HttpServletRequest request, HttpServletResponse response)
MyServlet.getLastModified
MyServlet.doGet

At the very minimum, I'm expecting to see GodFilter.doFilter (per steps 5, 6, & 7 of filter-chain invocation) after the MyServlet.doGet but it's not showing up. Am I missing something or misunderstood how servlet filter-chain works? Is the GodFilter class incorrect?

TIA!

[Edit 1]

I forgot to mention that the GodFilter is loaded via a class implementing ServletContainerInitializer :

FilterRegistration fr = context.addFilter(GodFilter.class.getSimpleName(), GodFilter.class);
fr.addMappingForUrlPatterns(EnumSet.of( //
        DispatcherType.ASYNC, //
        DispatcherType.ERROR, //
        DispatcherType.FORWARD, //
        DispatcherType.INCLUDE, //
        DispatcherType.REQUEST), false, "/*");
fr.setInitParameter("param1", "value1");

I've tried isMatchedAfter to true also but no changes.

Answer 1

After reviewing some more of my code for the Filters, I found I left out the crucial part of post chain.doFilter(request, response) processing in the Filter.doFilter :

Filter1.doFilter(ServletRequest request, ServletResponse response, FilterChain chain) {
    // pre chain processing 

    // if filter is last in filter chain, then mapped servlet will process hereafter
    chain.doFilter(request, response);

    // post chain processing
}