Server server = getServer();
WebApp webApp = server.getDefaultWebApp();
invocation.setWebApp(webApp);
if (webApp != null) {
rewriteChain = new WebAppFilterChain(rewriteChain, webApp);
if (webApp.getAccessLog() != null)
rewriteChain = new AccessLogFilterChain(rewriteChain, webApp);
}