Unable to override LocaleResolver bean in spring boot - spring-boot

Question

I have a pure REST spring boot application, which I'm trying to inject my own implementation of the AcceptHeaderLocaleResolver class:
public class SmartLocaleResolver extends AcceptHeaderLocaleResolver implements InitializingBean {
#Override
public Locale resolveLocale(HttpServletRequest request) {
// Some code...
}
}
And I'm injecting the bean like so:
#EnableTransactionManagement()
#SpringBootApplication(scanBasePackages = { "app.core.i18n" })
public class Application extends SpringBootServletInitializer {
private static Class<Application> applicationClass = Application.class;
#Autowired
private FhngHibernateInterceptor interceptor;
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurerAdapter() {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
.allowedOrigins("*")
;
}
#Bean
public LocaleResolver localeResolver() {
SmartLocaleResolver slr = new SmartLocaleResolver();
slr.setDefaultLocale(Locale.forLanguageTag("en"));
return slr;
}
};
}
}
However, no matter what I do, my own resolveLocale() method is never called. I set a breakpoint inside DispatcherServlet::initLocaleResolver() to confirm this:
private void initLocaleResolver(ApplicationContext context) {
try {
// This always throww the NoSuchBeanException
this.localeResolver = context.getBean(LOCALE_RESOLVER_BEAN_NAME, LocaleResolver.class);
}
}
catch (NoSuchBeanDefinitionException ex) {
// We need to use the default.
this.localeResolver = getDefaultStrategy(context, LocaleResolver.class);
}
The bean is never found so a default stragety is used.
What might be missing?
Thank you,

Answer 1

Move your LocaleResolver bean outside of your WebMvcConfigurer bean.
#Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurerAdapter() {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
.allowedOrigins("*");
}
};
}
#Bean
public LocaleResolver localeResolver() {
SmartLocaleResolver slr = new SmartLocaleResolver();
slr.setDefaultLocale(Locale.forLanguageTag("en"));
return slr;
}
The locale of your bean (pardon the pun) will not be picked up by Component Scanning if you define it there.