Setting filter parameters in Spring Boot

[jeffemandel]

I needed to change the log level in the filter in a Spring Boot package, and was initially stymied because I didn't have a web.xml. Here is what allowed me to do this:

@Component
public class MyUrlRewriteFilter extends UrlRewriteFilter {
    @Override
    public void init(FilterConfig config) throws ServletException {
        FilterConfig myConfig = new FilterConfig() {
            private final Map<String, String> params = new HashMap<String, String>();
            {
                params.put("logLevel","DEBUG");
            }
            @Override
            public String getFilterName() {
                return "MyUrlRewriteFilter";
            }
            @Override
            public ServletContext getServletContext() {
                return config.getServletContext();
            }
            @Override
            public String getInitParameter(String name) {
                return params.get(name);
            }
            @Override
            public Enumeration<String> getInitParameterNames() {
                return Collections.enumeration(params.keySet());
            }
        };
        super.init(myConfig);
    }
}