WebConfig.java

package com.github.jbai;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ResourceBundleMessageSource;
import org.springframework.core.task.AsyncTaskExecutor;
import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.multipart.support.StandardServletMultipartResolver;
import org.springframework.web.servlet.config.annotation.AsyncSupportConfigurer;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.github.jbai.web.action")
public class WebConfig extends RepositoryRestMvcConfiguration {
	
	@Bean
    MultipartResolver multipartResolver() {
        return new StandardServletMultipartResolver();
    }

	@Bean
	public InternalResourceViewResolver internalResourceViewResolver() {
		InternalResourceViewResolver resolver = new InternalResourceViewResolver();
		resolver.setPrefix("/WEB-INF/views/");
		resolver.setSuffix(".jsp");
		return resolver;
	}

	@Bean
	public ResourceBundleMessageSource resourceBundleMessageSource() {
		ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
		messageSource.setBasename("messages");
		return messageSource;
	}	

	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		registry.addResourceHandler("/resources/**")
				.addResourceLocations("/resources/").setCachePeriod(31556926);
		registry.addResourceHandler("/resources/css/**")
				.addResourceLocations("/resources/css/")
				.setCachePeriod(31556926);
	}
	
	@Override
	public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
		configurer.setTaskExecutor(getAsyncExecutor());
	}
	
	private AsyncTaskExecutor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(7);
        executor.setMaxPoolSize(42);
        executor.setQueueCapacity(11);
        executor.setThreadNamePrefix("asyncExecutor-");
        executor.initialize();
        return executor;
    }	

	@Override
	public void configureDefaultServletHandling(
			DefaultServletHandlerConfigurer configurer) {
		configurer.enable();
	}

}