.addMapping("/path/default"))
.addFilter(Servlets.filter("message", MessageFilter.class).addInitParam(MessageFilter.MESSAGE, "FILTER_TEXT "))
.addFilterUrlMapping("message", "*.txt", DispatcherType.REQUEST);
DeploymentManager manager = container.addDeployment(builder);
manager.deploy();
root.addPrefixPath(builder.getContextPath(), manager.start());
DefaultServer.setRootHandler(root);
}