WebMvcConfig.java

package com.sheetsj.config;

import java.util.List;

import org.springframework.context.MessageSource;
import org.springframework.context.annotation.*;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
import org.springframework.core.MethodParameter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.validation.Validator;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.*;
import org.springframework.web.servlet.config.annotation.*;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
import org.springframework.web.servlet.view.tiles3.*;

@Configuration
@Profile("production")
public class WebMvcConfig extends WebMvcConfigurationSupport {
	
	private static final String MESSAGE_SOURCE = "/WEB-INF/i18n/messages";
	private static final String TILES = "/WEB-INF/tiles/tiles.xml";
	private static final String VIEWS = "/WEB-INF/views/**/views.xml";
	
	private static final String RESOURCES_HANDLER = "/resources/";
	private static final String RESOURCES_LOCATION = RESOURCES_HANDLER + "**";
	
	@Override
	public RequestMappingHandlerMapping requestMappingHandlerMapping() {
		RequestMappingHandlerMapping requestMappingHandlerMapping = super.requestMappingHandlerMapping();
		requestMappingHandlerMapping.setUseSuffixPatternMatch(false);
		requestMappingHandlerMapping.setUseTrailingSlashMatch(false);
		return requestMappingHandlerMapping;
	}
	
	@Bean(name = "messageSource")
	public MessageSource configureMessageSource() {
		ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
		messageSource.setBasename(MESSAGE_SOURCE);
		messageSource.setCacheSeconds(5);
		return messageSource;
	}
	
	@Bean
	public TilesViewResolver configureTilesViewResolver() {
		return new TilesViewResolver();
	}
	
	@Bean
	public TilesConfigurer configureTilesConfigurer() {
		TilesConfigurer configurer = new TilesConfigurer();
		configurer.setDefinitions(new String[] {TILES, VIEWS});
		return configurer;
	}
	
	@Override
	public Validator getValidator() {
		LocalValidatorFactoryBean validator = new LocalValidatorFactoryBean();
		validator.setValidationMessageSource(configureMessageSource());
		return validator;
	}
	
	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		registry.addResourceHandler(RESOURCES_HANDLER).addResourceLocations(RESOURCES_LOCATION);
	}

	@Override
	public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
		configurer.enable();
	}
	
	@Override
	protected void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
		argumentResolvers.add(new UserDetailsHandlerMethodArgumentResolver());
	}
	
	// custom argument resolver inner classes

	private static class UserDetailsHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {

		public boolean supportsParameter(MethodParameter parameter) {
			return UserDetails.class.isAssignableFrom(parameter.getParameterType());
		}

		public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
			Authentication auth = (Authentication) webRequest.getUserPrincipal();
			return auth != null && auth.getPrincipal() instanceof UserDetails ? auth.getPrincipal() : null;
		}
	}
}