Get all keys from spring ReloadableResourceBundleMessageSource
I am using ReloadableResourceBundleMessageSource to store my system's list of values. So I can use i18N functionality
I am using multiple resources in the basenames ReloadableResourceBundleMessageSource. I want to pass all localized web interface shortcuts to the client (front-end) in order to localize it on the client. Is there a way to download all the keys of my resource packs?
here is my definition of ReloadableResourceBundleMessageSource bean:
<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basenames">
<list>
<value>classpath:resource1</value>
<value>classpath:resource2</value>
</list>
</property>
<property name="cacheSeconds" value="60"/>
<property name="defaultEncoding" value="UTF-8"/>
<property name="useCodeAsDefaultMessage" value="true"/>
</bean>
and this is my controller passing all keys:
@Component
@RequestMapping("/bundle")
public class ResourceBundleController {
@Autowired
private MessageSource messageSource;
@RequestMapping(value = "/locales.js")
public ModelAndView strings(HttpServletRequest request) {
// Call the string.jsp view
return new ModelAndView("/WEB-INF/includes/locales.jsp", "keys", ??? );// HERE IS MY PROBLEM. HOW SHOULD I GET ALL THE KEYS FROM MESSAGESOURCE
}
}
and here are my client resource bundle keys:
<%@page contentType="text/javascript" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@taglib prefix="spring" uri="http://www.springframework.org/tags"%>
var messages = {};
<c:forEach var="key" items="${keys}">
messages["<spring:message text='${key}' javaScriptEscape='true'/>"] = "<spring:message code='${key}' javaScriptEscape='true' />";
</c:forEach>
Any help would be appreciated.
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1 answer
Updated spring configuration information is related to resource package cache
You can do something like this:
Your own implementation ReloadableResourceBundleMessageSource
:
public class ExposedResourceMessageBundleSource extends ReloadableResourceBundleMessageSource {
private static final Logger LOGGER = Logger.getLogger(ExposedResourceMessageBundleSource.class);
@Override
protected Properties loadProperties(Resource resource, String fileName) throws IOException {
LOGGER.info("Load " + fileName);
return super.loadProperties(resource, fileName);
}
/**
* Gets all messages for presented Locale.
* @param locale user request locale
* @return all messages
*/
public Properties getMessages(Locale locale){
return getMergedProperties(locale).getProperties();
}
}
Service definition for handling operations with sources:
public interface MessageResolveService extends MessageSourceAware{
String getMessage(String key, Object[] argumentsForKey, Locale locale);
Map<String,String> getMessages(Locale locale);
}
And the implementation:
@Service
public class MessageResolverServiceImpl implements MessageResolveService{
private static final Logger LOGGER = Logger.getLogger(MessageResolverServiceImpl.class);
private MessageSource messageSource;
@Override
public void setMessageSource(MessageSource messageSource) {
LOGGER.info("Messages i18n injected");
this.messageSource = messageSource;
}
public String getMessage(String key, Object[] arguments, Locale locale){
String message = "";
try{
message = messageSource.getMessage(key,arguments,locale);
} catch(NoSuchMessageException e){
message = key;
LOGGER.warn("No message found: "+key);
}
return message;
}
public Map<String,String> getMessages(Locale locale){
Properties properties = ((XmlWebApplicationContext)messageSource).getBean("messageSource",
ExposedResourceMessageBundleSource.class).getMessages(locale);
Map<String,String> messagesMap = new HashMap<String,String>();
for(Map.Entry<Object,Object> entry: properties.entrySet()){
if(entry.getKey() != null && entry.getValue() != null) {
messagesMap.put(entry.getKey().toString(), entry.getValue().toString());
}
}
return messagesMap;
}
}
Spring Configuration:
<bean id="messageSource" class="your.package.ExposedResourceMessageBundleSource">
<property name="basenames">
<list>
<value>classpath:yourFileName</value>
<value>classpath:yourNextFileName</value>
</list>
</property>
<property name="defaultEncoding" value="UTF-8"/>
<property name="cacheSeconds" value="10"/> //If you want reload message every couple seconds. In this case every 10 seconds.
</bean>
And yours @Controller
(similar to this):
@Component
@RequestMapping("/bundle")
public class ResourceBundleController {
@Autowired
private MessageResolveService messageResolveService;
@RequestMapping(value = "/locales.js")
public ModelAndView strings(HttpServletRequest request) {
// Call the string.jsp view
return new ModelAndView("/WEB-INF/includes/locales.jsp", "keys", messageResolverService.getMessages(LocaleContextHolder.getLocale()));
}
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