ReloadableResourceBundleMessageSource not working - spring

Question

Currently im working on a new Spring 4 + Thymeleaf + Security project without XML bean files. Somehow the localization property files are not loading and i cant find anything about them in the log files.
/**
* Generates the i18n language loader.
*
* #return
*/
#Bean(name="messageSource")
public ReloadableResourceBundleMessageSource messageSource() {
ReloadableResourceBundleMessageSource resource = new ReloadableResourceBundleMessageSource();
resource.setBasename("classpath:messages");
resource.setDefaultEncoding("UTF-8");
resource.setUseCodeAsDefaultMessage(true);
resource.setFallbackToSystemLocale(false);
return resource;
}
/**
* Generates the i18n language changer parameter.
*
* #return
*/
#Bean
public LocaleChangeInterceptor localeChangeInterceptor() {
LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
localeChangeInterceptor.setParamName("language");
return localeChangeInterceptor;
}
/**
* Genereates the default i18n language.
*
* #return
*/
#Bean(name = "localeResolver")
public SessionLocaleResolver localeResolver() {
SessionLocaleResolver localeResolver = new SessionLocaleResolver();
localeResolver.setDefaultLocale(new Locale("en"));
return localeResolver;
}
/**
* Generates the template resolver for thymeleaf.
*
* #return
*/
#Bean
public ServletContextTemplateResolver templateResolver() {
ServletContextTemplateResolver resolver = new ServletContextTemplateResolver();
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".html");
resolver.setTemplateMode("HTML5");
resolver.setCacheable(false);
return resolver;
}
/**
* Generates the template engine for thymeleaf.
*
* #return
*/
public SpringTemplateEngine templateEngine() {
SpringTemplateEngine engine = new SpringTemplateEngine();
engine.setTemplateResolver(templateResolver());
engine.addDialect(new SpringSecurityDialect());
return engine;
}
/**
* Generates the view resolver from Spring MVC with thymeleaf intergrated.
*
* #return
*/
#Bean
public ViewResolver viewResolver() {
ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
viewResolver.setTemplateEngine(templateEngine());
viewResolver.setOrder(1);
viewResolver.setViewNames(new String[]{"*"});
viewResolver.setCache(false);
return viewResolver;
}
/**
* Add resources.
*
* #param registry
*/
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/assets/**").addResourceLocations("/WEB-INF/assets/");
}
/**
* Add interceptors.
*
* #param registry
*/
#Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(localeChangeInterceptor());
}
File names in the src/main/resources/ folder:
messages.properties
messages_en.properties
messages_nl.properties
Is there anyone who can help me out?

Answer 1

Slash character "/" denoting the classpath root is missing in the basename pattern of your ReloadableResourceBundleMessageSource.
resource.setBasename("classpath:/messages");

Answer 2

Javabase Config:
#Configuration
#EnableWebMvc
public class AppConfig extends WebMvcConfigurerAdapter {
#Bean
public MessageSource messageSource() {
ReloadableResourceBundleMessageSource messageSource = new
ReloadableResourceBundleMessageSource();
messageSource.setBasename("classpath:messages");
messageSource.setCacheSeconds(10);
return messageSource;
}
#Bean
public LocalValidatorFactoryBean localValidatorFactoryBean() {
LocalValidatorFactoryBean factoryBean = new LocalValidatorFactoryBean();
factoryBean.setValidationMessageSource(messageSource());
return factoryBean;
}
#Override
public Validator getValidator() {
return localValidatorFactoryBean();
}
}
XmLbase Config:
Note: You should add mvc namespaces already.
<mvc:annotation-driven validator="validatorFactoryBean"/>
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="classpath:messages"/>
</bean>
<bean id="validatorFactoryBean"
class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
<property name="validationMessageSource" ref="messageSource"/>
</bean>
Note: If you're trying to load from "webapp" folder so there is no need to use "classpath:" prefix.

Answer 3

I neded up with the following configuration for my dev env:
application.properties:
spring.messages.basename=file:src/main/resources/messages
spring.messages.cache-duration=0
Java configuration:
#Bean
#ConfigurationProperties(prefix = "spring.messages")
public MessageSourceProperties messageSourceProperties() {
return new MessageSourceProperties();
}
#Bean(name = AbstractApplicationContext.MESSAGE_SOURCE_BEAN_NAME)
public ReloadableResourceBundleMessageSource reloadableResourceBundleMessageSource( MessageSourceProperties properties ) {
ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
if (StringUtils.hasText( properties.getBasename() )) {
messageSource.setBasenames( StringUtils.commaDelimitedListToStringArray( StringUtils.trimAllWhitespace( properties.getBasename() ) ) );
}
if (properties.getEncoding() != null) {
messageSource.setDefaultEncoding( properties.getEncoding().name() );
}
messageSource.setFallbackToSystemLocale( properties.isFallbackToSystemLocale() );
Duration cacheDuration = properties.getCacheDuration();
if (cacheDuration != null) {
messageSource.setCacheMillis( cacheDuration.toMillis() );
}
messageSource.setAlwaysUseMessageFormat( properties.isAlwaysUseMessageFormat() );
messageSource.setUseCodeAsDefaultMessage( properties.isUseCodeAsDefaultMessage() );
return messageSource;
}
Exaplanation:
spring.messages.basename=file:src/main/resources/messages => read files directly from source
spring.messages.cache-duration=0 => disable caching for files to be reloaded. Default is -1 which means cache forever.
The ReloadableResourceBundleMessageSource bean is a direct copy from spring's MessageSourceAutoConfiguration.java impl, but using ReloadableResourceBundleMessageSource instead as message source.
Bean needs to have name AbstractApplicationContext.MESSAGE_SOURCE_BEAN_NAME to disable default auto-configuration.