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If you change a property file in a message catalog, you'll see the change immediately, just as with component classes and component templates (provided you're not running in production mode).

Asset Localization

When injecting assets, the injected asset will be localized as well. A search for the closest match for the active locale is made, and the final Asset will reflect that.

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Tapestry "narrows" the raw request locale, as specified in the request, to a known quantity. It uses the configuration symbol tapestry.supported-locales to choose the effective locale for each request. This value is a comma-separated list of locale names. Tapestry searches the list for the best match for the request locale; for example, a request locale of "fr_FR" would match "fr" but not "de". If no match is found, then the first locale name in the list is used as the effective locale (that is, the first locale is used as the default for non-matching requests). Thus a site that primarily caters to French speakers would want to list "fr" as the first locale in the list.

Changing the Locale

The PersistentLocale service PersistentLocale is can be used to programmatically override the locale for the current request.

@Inject 
private PersistentLocale persistentLocale;

void onActionFromLocaleToggle() {
    if ("en".equalsIgnoreCase(persistentLocale.get().getLanguage())) {
        persistentLocale.set(new Locale("de"));
    } else {
        persistentLocale.set(new Locale("en"));
    }
    return this;
}
public String getDisplayLanguage() {
    return persistentLocale.get().getDisplayLanguage();
}

Once a persistent locale is set, you will see the locale name as the first virtual folder in page render and component event requests URLs. In this way, a persistent locale will, in fact, persist from request to request, or in a user's bookmarks.

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